JP2004093482A - Movable arm type centrifugal force loading test device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable arm type centrifugal force loading test device that measures all kinds of data by setting a model ground to a state which is close to that of an actual ground so that the influences of rotational acceleration and gravitational acceleration may be neglected. <P>SOLUTION: This movable arm type centrifugal force loading test device comprises a vertical rotating shaft 7 which is rotated by means of a rotationally driving means, a main arm 11 which is horizontally fixed to the shaft 7, and a swinging arm 13 horizontally swingably supported by the front end of the arm 11. This test device also comprises a platform 21 which is hung down from the front end of the swinging arm 13 in a state where the platform 21 can be rotated vertically in the extended direction of the arm 13 and a measuring means which measures all kinds of data from the model ground. The platform 21 which can rotate at the front end of the swinging arm 13 can offset not only gravitational acceleration by swinging up, but also the rotation acceleration by freely rotating horizontally. While the rotational acceleration is applied, centrifugal acceleration always acts in the direction toward the bottom section of the platform 21. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an arm-movable centrifugal force test apparatus, and more particularly to an arm-movable centrifugal force for testing various data such as load, displacement, acceleration, and temperature of a model ground in a reduced model in which a building is built on the ground. The present invention relates to a load test device.
[0002]
[Prior art]
The centrifugal force loading test is a test in which the same weight stress as that of actual ground is applied to a model ground such as a reduced model by centrifugal force to reproduce the same behavior as a real model on the reduced model. This test eliminates the need for laborious and expensive full-scale models.
[0003]
A conventional centrifugal loading test apparatus includes a rotating arm fixed horizontally to a vertical rotating shaft, and a swinging arm that is supported by the tip of the rotating arm so as to be rotatable in the direction of the rotating arm and loaded with a specimen. A gantry, a driving device for rotating and driving the rotating shaft, and a sample container for storing the specimen, each of which includes various types of the specimen when the rotating shaft is rotated to apply centrifugal force to the specimen. It measures data (for example, see Patent Literature 1 and Patent Literature 2).
[0004]
[Patent Document 1]
Japanese Patent No. 3314622 (page 2, columns 3 to 4, FIG. 1)
[Patent Document 2]
JP 2001-124668 A (page 2, column 2 to page 3, column 4; FIG. 1).
[0005]
[Problems to be solved by the invention]
By the way, in the conventional centrifugal force loading test, it is effective to elucidate the behavior of the ground that largely depends on its own weight stress such as slope stability, bearing capacity, consolidation, liquefaction, etc. related to slope failure. However, it has various problems like other mechanical tests.
[0006]
Above all, since the centrifugal acceleration is proportional to the square of the radius and the angular velocity, and the field of uniform acceleration has a curvature, the fact that the direction and magnitude of the acceleration are not uniform in the model is unique to the centrifugal loading test. Known as a problem. In other words, since the centrifugal acceleration is proportional to the product of the radius of gyration and the square of the angular velocity, the magnitude of the acceleration varies depending on the distance from the rotation axis. Strictly speaking, the distribution of the acceleration is different from the actual ground where a constant gravitational acceleration always acts on the whole such as moving to the ground.
[0007]
In addition, there has been a problem of acceleration (hereinafter, referred to as “rotational acceleration”) generated in the tangential direction of the rotation trajectory during acceleration until reaching a predetermined centrifugal acceleration, which has not been regarded as important in the past.
[0008]
More specifically, referring to FIG. 9, at the time of acceleration from the start of rotation of the rotating arm 201 to reaching a certain rotation speed, the centrifugal acceleration Ace acting outward in the radial direction and the centrifugal acceleration Ace always acting in the vertical direction. There are three accelerations acting on the model ground 203: a 1 G gravity acceleration Ag and a rotation acceleration Ar acting in the tangential direction of the rotation orbit. Therefore, the direction of action of the resultant acceleration Aco is the direction in which the three accelerations Ace, Ag, and Ar are combined.
[0009]
On the other hand, when the rotating arm 201 reaches a constant rotational speed at a constant rotational speed, the rotational acceleration Ar becomes 0 (zero) as shown in FIG. 10, so that the centrifugal acceleration Ace and the gravitational acceleration Ag are combined. The acceleration becomes Aco.
[0010]
The conventional centrifugal load test apparatus is designed so as to correspond only to the combined direction of the centrifugal acceleration ace and the gravitational acceleration Ag, simply by swinging the swinging gantry attached to the end of the rotating arm 201.
[0011]
Therefore, there is still a problem with respect to the effect of the rotational acceleration, and when an experiment is performed with a large acceleration, there is a concern that the rotational acceleration is particularly problematic in the model ground 203 such that the distribution of pore water pressure is biased in the direction of the rotational acceleration. For this reason, there is a problem that it is difficult to apply the same weight stress as the actual ground to the model ground 203 such as a reduced model by centrifugal force.
[0012]
For example, referring to FIG. 11, in a conventional centrifugal force loading test device, a rotational acceleration Ar of about 2.5 G acts. Thus, the influence of the rotational acceleration Ar cannot be ignored.
[0013]
The present invention has been made to solve the above-described problems, and its purpose is to measure various data by setting the model ground to a state close to the real ground so that the effects of rotational acceleration and gravitational acceleration can be ignored. It is an object of the present invention to provide a centrifugal force loading test device with a movable arm that can easily measure the various data.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, an arm-movable centrifugal force loading test apparatus according to the present invention according to claim 1 includes a vertical rotation shaft rotated by a rotation driving means, a main arm fixed to the rotation shaft in a horizontal direction, A swing arm that is pivotally supported in a horizontal direction at a tip of the main arm, and a model ground is suspended on the tip of the swing arm so as to be pivotable in a vertical direction in the extension direction of the swing arm. It is characterized by comprising a platform and measuring means for measuring various data on the model ground.
[0015]
Therefore, since the swing mechanism is composed of the main arm and the swing arm, the platform not only swings up at the tip of the swing arm to cancel the gravitational acceleration, but also rotates by the swing arm freely rotating in the horizontal direction. Acceleration is also offset. Even during the rotational acceleration, only the centrifugal acceleration always acts toward the bottom of the platform, that is, vertically downward of the model ground, so that various data are measured in a state where the model ground is close to the actual ground.
[0016]
According to a second aspect of the present invention, there is provided an arm-movable centrifugal force testing apparatus according to the first aspect, wherein the measuring means includes an imaging means for imaging the behavior of the model ground. An imaging unit is provided on the platform, a slip ring is provided on the rotating shaft to transmit an image signal captured by the imaging unit to the outside, and an image processing device is provided that processes an image transmitted via the slip ring. It is characterized by becoming.
[0017]
Therefore, since the imaging means is provided on the platform, the model ground can be always imaged by the imaging means while the platform is rotating, and the image signal is easily transmitted via the slip ring, and the external image can be obtained. Recorded and analyzed by the processing unit.
[0018]
According to a third aspect of the present invention, there is provided the centrifugal force loading test apparatus according to the first aspect, wherein the measurement means wirelessly transmits measurement signals of various data on the model ground to the measuring means. A radio transmission system having a unit and a receiving unit, wherein the transmitting unit is provided near the base of the main arm or above the rotation axis, and the reception unit is provided outside the main arm and the rotation axis, and the reception unit And a data analysis processing device for analyzing data transmitted from the computer.
[0019]
Therefore, since the data measured by the measuring means is transmitted wirelessly by the transmitting unit and received by the receiving unit, it is easy to measure and transmit various types of data while the platform is rotating. Moreover, the radio wave transmission system is less expensive than the slip ring. Further, since the antenna is mounted near the base of the main arm or above the rotation axis, the adverse effect of the radio wave condition caused by the turning of the antenna is minimized.
[0020]
According to a fourth aspect of the present invention, there is provided a centrifugal force loading test apparatus according to the first aspect, wherein the centrifugal force loading test apparatus according to the first aspect has a protective wind surrounding the rotary shaft, the main arm, the swing arm, and the platform. The present invention is characterized in that a protective windshield device comprising a windshield and an opening / closing door that enters and exits the protective windshield is provided.
[0021]
Therefore, since the rotating part is surrounded by the protective windshield, even if an abnormality such as the pop-out of the sample occurs during the operation of the apparatus, it is a safety measure and the air resistance of the rotating part is reduced. Further, since the protective windshield has an opening / closing door, an operator can easily enter and exit the protective windshield to easily exchange a sample such as a model ground.
[0022]
According to a fifth aspect of the present invention, there is provided the centrifugal force loading test apparatus according to the first aspect of the present invention, wherein the measuring means detects vibration of a bearing portion which supports the rotary shaft. A bearing vibration detector, a bearing temperature detector for detecting a temperature of the bearing portion, and a driving means temperature detector for detecting a temperature of the rotary driving means, each of which is measured by each of the detectors. It is characterized in that a safety management means for generating an alarm when a measured value exceeds a preset value is provided.
[0023]
Therefore, abnormal vibration and temperature rise of the bearing portion of the rotating shaft due to high-speed rotation, or temperature rise of the rotation driving means are constantly measured, and when the measured value exceeds a preset value, the safety management means surely issues an alarm. , Safety management is automatically performed.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0025]
1 and 2, the arm-movable centrifugal force loading test apparatus 1 according to this embodiment can be roughly classified into a rotating section, a driving section, a protective windshield section, a control section, a measuring section, a safety management apparatus. And a part.
[0026]
As the rotating part, a rotating shaft support frame 5 is integrally erected on the upper surface of the bottom frame 3 fixed to the floor surface, and the rotating shaft 7 is extended substantially vertically in the rotating shaft supporting frame 5. And bearings via upper and lower bearings 9. Two main arms 11 are fixed on the upper part of the rotating shaft 7 projecting upward from the rotating shaft support frame 5 so as to be substantially symmetrical in the horizontal direction. Further, a swing arm 13 is rotatably supported at the tip of each main arm 11 by a bearing boss 15 and a swing arm shaft 17 so as to be rotatable in the horizontal direction. As the bearing boss 15, for example, a cylindrical bearing is used.
[0027]
Also, a platform 21 on which the sample container 19 is mounted is rotatably suspended at the tip of the swing arm 13 in the direction perpendicular to the extension direction of the swing arm 13 via a shaft 23 in the direction of extension. It is configured to swing up with the increase of. The sample container 19 is for holding a model ground.
[0028]
The model ground is mounted on only one side of the two symmetrical platforms 21, and the other platform 21 has balance weights for balancing the left and right main arms 11, the swing arms 13 and the platforms 21. 25 is placed.
[0029]
As a driving unit, the lower end of the rotating shaft 7 is connected to an output shaft of a speed reducer 27 provided on the bottom frame 3 via a force pulling ring 29, and an input shaft of the speed reducer 27 serves as a rotation driving means. , For example, is connected to a drive shaft of an inverter motor 31 via a chain force coupling 33. In this embodiment, the rotation speed and the control of the inverter motor 31 are easy, and the maximum rotation speed is 300 rpm. The effective radius of the entire length of the main arm 11, the swing arm 13 and the platform 21 is, for example, 1.5 m, and the maximum acceleration is 150 G at the lowermost part of the platform 21. The acceleration reaching time of the inverter motor 31 up to the maximum acceleration of 150 G is 300 seconds at the maximum.
[0030]
In addition, since the motor 31 is directly connected to the speed reducer 27 immediately below the rotary shaft 7, a shaft connecting the inverter motor 31 and the speed reducer 27 is not required, and the structure is compact.
[0031]
With the above configuration, the rotation of the inverter motor 31 is reduced by the speed reducer 27 and transmitted to the rotating shaft 7. The rotation of the rotation shaft 7 causes the main arm 11 and the swing arm 13 to rotate. At the time of acceleration from the start of rotation until the rotation reaches a certain rotation speed, it is shown in FIG. As described above, the three accelerations of the centrifugal acceleration Ace acting radially outward, the 1G gravitational acceleration Ag constantly acting in the vertical direction, and the rotational acceleration Ar acting tangentially to the rotation orbit are applied to the model ground. Works. Therefore, the direction of action of the resultant acceleration Aco is the direction in which the three accelerations Ace, Ag, and Ar are combined.
[0032]
However, in the embodiment of the present invention, since the swing mechanism is constituted by the main arm 11 and the swing arm 13, this swing mechanism causes the swing arm 13 to rotate with the centrifugal acceleration Ace as shown in FIG. It will move in the direction combined with the acceleration Ar. The swing mechanism is a mechanism that allows the swing arm 13 to freely rotate in the horizontal direction.
[0033]
Therefore, by the combination of the swing mechanism and the platform 21 that swings up in the vertical direction, the platform 21 not only cancels out the gravitational acceleration Ag by swinging up at the tip of the swing arm 13 but also allows the swing arm 13 to freely rotate in the horizontal direction. Thus, the rotational acceleration Ar is also offset. In other words, the swing arm 13 is such that the combined direction of the centrifugal acceleration Ace and the rotational acceleration Ar when there is no swing mechanism is located on a horizontal plane and an extension of the swing arm 13 as shown by a two-dot chain line in FIG. Go to
[0034]
As a result, since the platform 21 moves in the direction in which the centrifugal acceleration Ace, the gravitational acceleration Ag, and the rotational acceleration Ar are combined, even during the rotational acceleration, only the centrifugal acceleration Ace is directed downward at the bottom of the platform 21, in other words, always downward in the vertical direction of the model ground. Act on. The sample container 19 (model container) moves three-dimensionally in the direction in which the centrifugal acceleration Ace, the gravitational acceleration Ag, and the rotational acceleration Ar are combined, and only the centrifugal acceleration Ace is applied to the model ground. can do.
[0035]
The protective windshield includes safety measures in the event that an abnormality such as a sample jumps out while the movable arm centrifugal force loading test device 1 is operating, and a protective windshield for reducing the air resistance of the rotating unit. The protective windshield 35 is provided with a protective windshield 37 made of, for example, a plurality of steel plates so as to surround the rotating part, and an operator enters and exits the protective windshield 37. Door 39 for opening and closing.
[0036]
The protective windshield 37 is secured to the bottom frame 41 to prevent lateral displacement when an unbalanced load is generated. An opening / closing door 39 is provided so as to be able to open and close so as to cover an entrance 43 provided on an upper wall of the protection windshield 37. In the vicinity of the entrance 43, a work stair 45 is provided outside the side wall of the protection windshield 37. Is provided, and an elevating ramp 47 is provided inside the side wall.
[0037]
The control unit controls and operates the operation and stop of the arm-movable centrifugal load test apparatus 1 and is integrated on a table-top operation panel 49 as shown in FIG. It is installed in another place. Note that a control panel 51 is connected to the operation panel 49.
[0038]
Referring to FIGS. 3 to 6, the measuring unit is a measuring system including measuring means for measuring various data on the model ground, and includes a load, a displacement, an accelerometer, and a CCD force camera 53 as an imaging means. Measuring equipment such as the above, a wireless data logger 55 (radio wave transmission system) for wirelessly transmitting the measurement signal of the above data, equipment (image processing system) for transmitting an image signal of the CCD force sensor 53, and further data. For example, an analysis personal computer 57 as a data analysis processing device for recording and analyzing, and a DVD device 59 as an image processing device for processing a transmitted image are provided.
[0039]
In centrifugal model experiments, it is still important to closely observe the behavior of the entire model. In the arm movable type centrifugal force loading test apparatus 1 of this embodiment, as shown in FIG. 3, the behavior of the model ground is obtained by capturing the behavior of the model ground by using a very small mounting CCD force film 53 mounted on the platform 21. The image signal is recorded on the DVD device 59 through the slip ring 61.
[0040]
More specifically, referring to FIG. 1, a slip ring frame 63 is integrally provided substantially at the center of the upper surface of the upper wall of the protective windshield 37, and the slip ring frame 63 is provided with a bearing 65 via a bearing 65. A slip ring 61 is attached. The lower portion of the slip ring 61 is connected to the upper end of the rotating shaft 7 via a joint 67. On the upper surface near the rotation center of the main arm 11, a measuring instrument fixing frame 69 is integrally provided around the joint 67 with a gap.
[0041]
Further, the image processing system will be described with reference to FIGS. 3 and 4. The mounting CCD power camera 53 is attached to, for example, a bracket (not shown) extending in the width direction on the side surface of the platform 21. The mounting CCD camera 53 is connected to a camera controller 73 and a video transmission modulator 75 provided on the measuring instrument fixed frame 69 via the swing arm 13 and the main arm 11 via a power camera cable 71 having a sufficient length. Then, the coaxial cable 77 is connected to the slip ring 61 via the joint 67. In the slip ring 61, the signal is transmitted from the rotor to the contact, and the contact is connected to the DVD device 59 and the monitor 81 via an external video transmission / demodulator 79 by a coaxial cable 77. Therefore, the ground behavior during the experiment is photographed by the ultra-compact on-board CCD force camera 53, and the obtained image signal is recorded on the DVD device 59 through the slip ring 61 and analyzed.
[0042]
Further, a monitoring CCD power lens 83 for monitoring the entire rotating section is installed inside the protection windshield 37, and the monitoring CCD power lens 83 is connected to another external power lens controller 85 by a coaxial cable 77. Is connected to the monitor 87.
[0043]
Further, the radio transmission system will be described with reference to FIGS. 5 and 6. Data measured by measuring instruments such as a small strain gauge load cell and an accelerometer is wirelessly transmitted by a wireless data logger 55. As the radio wave method, since the antenna 89 is mounted on the arm, when the rotation speed increases, the position of the antenna 89 moves rapidly on the circumference, the radio wave condition deteriorates, and measurement may be impossible, so In the embodiment of the present invention, this is achieved by attaching the antenna 89 of the wireless data logger 55 near the base of the rotating shaft 7. Further, if the antenna 89 is mounted on the center of the upper part of the rotating shaft 7, the accuracy is further improved.
[0044]
The wireless data logger 55 includes a transmitting unit 91 for transmitting data by radio waves and a receiving unit 93 for receiving radio waves. The transmitting unit 91 having an antenna 89 is provided on a measuring instrument fixed frame 69 near the base of the main arm 11. The receiving section 93 is provided outside the apparatus main body of the centrifugal force loading test apparatus 1 with the movable arm, and is inexpensive as compared with the slip ring 61. The apparatus used in this embodiment has a maximum of 500 channels. It can be expanded up to.
[0045]
More specifically, a small pressure sensor 97, a laser displacement meter 99, and a temperature sensor 101 inside the earthen tank are installed in, for example, a test earthen tank 95 serving as a model ground. It is connected to the transmitting section 91. Each device and the transmission unit 91 are connected to an external power supply via the slip ring 61. The receiving unit 93 is connected to, for example, an analysis personal computer 57 and a monitor 105 as a data analysis processing device for analyzing data by a cable 103.
[0046]
The safety management unit includes a system that constantly measures abnormal vibration and temperature rise of the bearing unit 9 of the rotating shaft 7 due to high-speed rotation, and turns on an alarm and a rotating light when the measured value exceeds a preset value. Has become.
[0047]
More specifically, referring to FIG. 7, the arm movable centrifugal force loading test device 1 includes, for example, a bearing vibration sensor 107 as a bearing vibration detector for detecting vibration of the upper and lower bearings 9 that support the rotating shaft 7. For example, a bearing temperature sensor 109 as a bearing temperature detector for detecting the temperature of the bearing portion 9, and a reduction gear temperature sensor 111 as a reduction gear temperature detector for detecting the temperature of the lubricating oil of the reduction gear 27, It is provided as a measuring means of the safety management device section.
[0048]
The sensors 107, 109, and 111 are connected by a cable 103 to an operation panel 49 provided outside the arm-movable centrifugal load test apparatus 1, and a control unit of the operation panel 49 detects each of the sensors. For example, a warning patrol light (yellow rotating light) is connected as safety management means for generating an alarm when the detected value exceeds a preset value. As this warning patrol light, a first patrol light 113 is provided above the protective windshield 35, and a second patrol light 115 is provided at the entrance of the test room. Further, an emergency stop button 117 for stopping the operation of the arm movable type centrifugal force loading test device 1 by an operator receiving the warning of the above-mentioned warning patrol lights 113 and 115 is connected to the operation panel 49. Therefore, safety management is automatically performed.
[0049]
The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. An acid-resistant rotary joint is attached to the upper part of the rotary shaft 7, and the liquid stored in an external tank (not shown) is supplied to the model ground on the platform 21 from the hose (not shown) via the acid-resistant rotary joint. it can. This is for forcibly deteriorating the model ground, and a strong oxidizing solution such as a special acid alloy Hastelloy C is used as the liquid.
[0050]
【The invention's effect】
As can be understood from the above description of the embodiment of the invention, according to the invention of claim 1, since the swing mechanism is constituted by the main arm and the swing arm, the platform swings at the tip of the swing arm. In addition to offsetting the gravity acceleration, the swing arm can be freely rotated in the horizontal direction to offset the rotational acceleration. Therefore, even during the rotational acceleration, only the centrifugal acceleration can always act on the bottom of the platform, that is, vertically downward of the model ground, so that various data can be measured with the model ground being close to the actual ground.
[0051]
According to the second aspect of the present invention, since the imaging means is provided on the platform, the model ground can be always imaged by the imaging means while the platform is rotating, and the image signal imaged by the slip ring can be easily externally output. To an external image processing device for recording and analysis.
[0052]
According to the third aspect of the present invention, the data measured by the measuring means can be wirelessly transmitted by the transmitting unit and received by the receiving unit. Therefore, while the platform is rotating, various types of data are measured and easily transmitted. it can. Moreover, the radio wave transmission system is less expensive than the slip ring. In addition, since the antenna of the transmission unit is mounted near the base of the main arm or above the rotation axis, the adverse effect of the radio wave condition due to the turning of the antenna can be minimized.
[0053]
According to the fourth aspect of the present invention, since the rotating part is surrounded by the protective windshield, even if an abnormality such as popping out of the sample occurs during the operation of the apparatus, it becomes a safety measure and reduces the air resistance of the rotating part. it can. Further, since the opening and closing door is provided on the protection windshield, the operator can easily enter and exit the protection windshield to easily exchange a sample such as a model ground.
[0054]
According to the invention of claim 5, abnormal vibration and temperature rise of the bearing portion of the rotating shaft due to high-speed rotation, or temperature rise of the rotation drive means are constantly measured, and when this measured value exceeds a preset value, Since the alarm can be securely generated by the safety management means, the safety management can be automatically performed.
[Brief description of the drawings]
FIG. 1 is an overall schematic explanatory view of an arm-movable centrifugal load testing apparatus according to an embodiment of the present invention.
FIG. 2 is a partial plan view of FIG.
FIG. 3 is a schematic explanatory diagram of an image processing system according to an embodiment of the present invention.
FIG. 4 is a schematic wiring diagram of FIG. 3;
FIG. 5 is a schematic explanatory diagram of a radio wave transmission system according to an embodiment of the present invention.
FIG. 6 is a schematic wiring diagram of FIG. 5;
FIG. 7 is a schematic explanatory diagram of a safety management device unit according to the embodiment of the present invention.
FIG. 8 is a schematic explanatory view of a swing mechanism according to the embodiment of the present invention.
FIG. 9 is a schematic explanatory diagram of acceleration acting on a model ground during rotation acceleration of a rotating arm in a conventional centrifugal force loading test device.
FIG. 10 is a schematic explanatory diagram of acceleration acting on a model ground during constant rotation of a rotating arm in a conventional centrifugal force loading test device.
FIG. 11 is a graph showing the magnitude of the rotational acceleration acting on the model ground during the rotational acceleration of the rotary arm in the conventional centrifugal load testing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Arm movable centrifugal load test apparatus 7 Rotating shaft 9 Bearing 11 Main arm 13 Swing arm 17 Swing arm shaft 19 Sample container 21 Platform 23 Shaft 25 Balance weight 27 Reduction gear (rotation drive transmission means)
31 Inverter motor (rotation drive means)
35 Protective windshield device 37 Protective windshield wall 39 Opening / closing door 43 Doorway 49 Operation panel 51 Control panel 53 CCD camera for mounting (imaging means)
55 wireless data logger (radio wave transmission system)
57 PC for analysis (data analysis processor)
59 DVD device (image processing device)
61 Slip ring 67 Joint part 69 Fixed frame for measuring equipment 83 CCD camera for monitoring (imaging means)
89 Antenna 91 Transmitter 93 Receiver 95 Test tank 97 Small pressure sensor 99 Laser displacement meter 101 Temperature sensor inside tank 107 Bearing vibration sensor (bearing vibration detector)
109 Bearing temperature sensor (bearing temperature detector)
111 Reduction gear temperature sensor (Reduction gear temperature detector)
113 First Patlite (Safety Management Means)
115 second patrol light (safety management means)
Ar Rotational acceleration Ace Centrifugal acceleration Ag Gravitational acceleration Aco Composite acceleration

Claims (5)

A vertical rotation shaft that is rotated by the rotation driving means, a main arm fixed horizontally to the rotation shaft, a swing arm pivotally supported at the tip of the main arm so as to be swingable in a horizontal direction, It is characterized by comprising a platform that is suspended at the tip so as to be rotatable in the vertical direction toward the extension direction of the swing arm and that loads the model ground, and a measuring unit that measures various data on the model ground. A movable arm centrifugal force testing device. The measuring unit includes an imaging unit for imaging the behavior of the model ground, the imaging unit is provided on the platform, and a slip ring is provided on the rotating shaft to transmit an image signal captured by the imaging unit to the outside, 2. The movable arm type load test device according to claim 1, further comprising an image processing device for processing an image transmitted through the slip ring. The measurement means includes a radio wave transmission system having a transmission unit and a reception unit for wirelessly transmitting measurement signals of various data on the model ground, wherein the transmission unit is provided near a root of the main arm or above a rotation axis, and The arm movable centrifugal force loading according to claim 1, characterized in that the unit is provided outside the main arm and the rotation axis, and a data analysis processing device for analyzing data transmitted from the receiving unit is provided. Testing equipment. 2. A protection windshield, comprising: a protection windshield surrounding the rotation shaft, the main arm, the swing arm, and a platform; and an opening / closing door that enters and exits the protection windshield. Arm movable centrifugal force loading test equipment. A bearing vibration detector for detecting a vibration of a bearing unit that supports the rotating shaft; a bearing temperature detector for detecting a temperature of the bearing unit; a driving unit temperature detector for detecting a temperature of the rotation driving unit; And a safety management means for generating an alarm when a measured value measured by each of the detectors exceeds a preset value. The movable arm type centrifugal force loading test device according to the above.

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