WO2007048271A1 - Appareil d’essai au choc - Google Patents

Appareil d’essai au choc Download PDF

Info

Publication number
WO2007048271A1
WO2007048271A1 PCT/CN2005/001752 CN2005001752W WO2007048271A1 WO 2007048271 A1 WO2007048271 A1 WO 2007048271A1 CN 2005001752 W CN2005001752 W CN 2005001752W WO 2007048271 A1 WO2007048271 A1 WO 2007048271A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
impact tester
tester according
test head
test
Prior art date
Application number
PCT/CN2005/001752
Other languages
English (en)
Chinese (zh)
Inventor
Tat Wing So
Ka Lun Fan
Ching Ching Cheung
Original Assignee
Jets Technics Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jets Technics Limited filed Critical Jets Technics Limited
Priority to PCT/CN2005/001752 priority Critical patent/WO2007048271A1/fr
Publication of WO2007048271A1 publication Critical patent/WO2007048271A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/40—Investigating hardness or rebound hardness
    • G01N3/48—Investigating hardness or rebound hardness by performing impressions under impulsive load by indentors, e.g. falling ball
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0032—Generation of the force using mechanical means
    • G01N2203/0033—Weight

Definitions

  • the present invention relates to a test instrument, and more particularly to an impact tester for measuring the impact capability of a sports field or a playground mat. Background technique
  • 'Existing impact testers such as the Triax 2000 impact tester from the Playground Clearing House in the United States, include a tripod mount and a spherical test head mounted on top of the tripod.
  • An accelerometer is installed in the test head. During the test work, the staff first measures the height of the test head with a ruler, and then makes the test head fall freely from the top of the tripod. When the test head is in contact with the surface of the mat, the accelerometer forms a power proportional to the acceleration value. The signal and the electrical signal are processed and converted into data indicating the impact resistance of the floor mat, thereby facilitating the recording and determination by the staff.
  • the tripod bracket is higher than the height of an ordinary person, and the operation is inconvenient.
  • the test head falls from a height. After contact with the floor mat, if the impact of the mat is not good enough, the test head will not be buffered, and it may rebound due to the speed too fast, causing damage to the nearby staff or others. hurt.
  • an object of the present invention to provide an impact tester which is compact in structure, light in weight, easy to operate, and safe and reliable.
  • an impact tester of the present invention includes a test stand and a drop assembly, wherein: the test stand includes a support platform and a plurality of retractable legs connected to the support platform, and the center of the support platform is a central through hole , each leg is evenly distributed around the bracket platform, in the center A magnetic seat with a switch is arranged beside the hole. When the switch is opened, the lower surface of the magnetic seat is magnetic, and when the switch is closed, the lower surface of the magnetic seat is not magnetic;
  • the drop assembly includes a drop shaft and a 3 ⁇ 4 test head connected to the lower end of the drop shaft.
  • the drop shaft cooperates with the center through hole.
  • the test head is hemispherical, made of a magnetically permeable material, and the spherical portion is downward. When the drop axis is lifted up through the center through hole, the upper surface of the test head can abut against the lower surface of the magnetic seat.
  • the impact tester of the present invention is light in weight and less than one meter in height, and one person can easily operate and complete the entire test procedure. During the test, the movement of the test head is constrained by the hollow shaft, and it will not hurt others due to rebound, and the safety is higher.
  • FIG. 1 is a schematic view of an embodiment of an impact tester of the present invention
  • Figure 2 is a plan view of the stent platform
  • Figure 3 is a side view of the stent platform
  • FIG. 4 is a schematic view of another embodiment of the impact tester of the present invention.
  • Figure 5 is a schematic view of the drop assembly of Figure 4.
  • Figure 6 is a flow chart of the electronic part of the impact tester of Figure 4. detailed description
  • the impact tester of the present invention includes a test stand and a drop assembly.
  • the test support comprises a support platform 13 and a plurality of telescopic legs 4 connected to the support platform 13, and the legs 4 are evenly distributed around the periphery of the support platform 13, and the support support platform 13 is hinged.
  • the center of the support platform 13 is a central through hole 14.
  • a magnetic base 2 with a rotary switch 25 is disposed near the central through hole 14. When the switch 25 is rotated to the open position, the lower surface 24 of the magnetic base 2 is magnetic, and when the switch 25 is rotated to the closed position, the lower surface 24 is not magnetic.
  • a plurality of permanent magnets are mounted in the magnetic base 2, and the rotation of the switch 25 adjusts the positions of the permanent magnet N and S poles so that the lower surface of the magnetic seat changes between magnetic and non-magnetic. .
  • Similar devices and operating principles are well known in the art, such as magnetic shelves commonly used in laboratory measurements.
  • the magnetic base 2 may also include an electromagnet. When the switch 25 is opened, the alternating current is turned on, the lower surface 24 of the magnetic base 2 is magnetic, and when the switch 25 is closed, the alternating current is disconnected. The lower surface 24 is not magnetic.
  • the drop assembly includes a drop shaft 1 and a test head 6 coupled to the lower end of the drop shaft.
  • the drop shaft 1 cooperates with the center through hole 14 during the impact test.
  • the test head is hemispherical with the spherical portion down.
  • the upper surface of the spherical test head 6 may have a threaded hole, and the lower end of the drop shaft 1 has an outer thread so that the two are threadedly connected to achieve a detachable fit.
  • a bearing bush 21 may be mounted on the center through hole 14, and the bearing bush 21 has a protrusion from both sides of the center through hole 14.
  • the flat upper and lower end faces 22 and 23 are coming out.
  • the test head 6 is made of a magnetically permeable material.
  • An adjustment mechanism 3 is also mounted on the telescopic legs 4.
  • the adjustment mechanism 3 can be constructed of any structure known in the art for adjusting the extension length of each telescopic leg to adjust the distance between the test head 6 and the floor mat 5 to be tested.
  • Each leg is engraved with a corresponding reference tick mark for tuning.
  • the drop axis 1 and test head 6 of the drop assembly of the present invention may be hollow.
  • a 0-shaped indicating ring 9 is fitted.
  • the O-shaped indicator ring 9 hits the upper end surface 22 of the bearing bushing 21 and is blocked.
  • a horizontal display device 7 can also be provided on the stand platform 13.
  • the horizontal display device can use flat water drops.
  • the retractable leg 4 of the test stand of the present invention is adjusted to the reference scale line by means of the adjustment mechanism 3.
  • the drop shaft 1 is then passed through the center through hole 14 in which the bearing bushing 21 is mounted, and the test head 6 is attached.
  • a groove 41 is provided at the upper end of the drop shaft 1.
  • a corresponding pin hole 42 is formed in the two portions where the end portion is separated by the groove 41.
  • the mounting pin 10 can be mounted in the pin hole 42 to be perpendicular to the groove 41.
  • Both ends of the "n"-shaped mounting bracket 8 are inserted into the mounting holes 81, 82 of the bracket platform 13, respectively.
  • the groove 41 is aligned with the beam portion of the mounting frame 8, and the beam portion is sized such that it can fit in the groove 41, and then the mounting pin 10 is inserted into the pin hole. 42, release the drop assembly, and support the drop assembly in the standby position by the mounting bracket 8 and the mounting pin 10. Since the drop shaft 1 and the test head 6 are detachable. It is also possible to first mount the drop shaft 1 as described above, and then mount the test head 6 at the lower end of the drop shaft 1, which facilitates the movement of the impact tester.
  • the switch of the magnetic base 2 is opened. Removing the mounting bracket 8 and the mounting pin 10, lifting the drop shaft 1 until the upper surface of the test head 6 abuts against the lower end surface of the magnetic base 2 24 and attracted by magnetism.
  • the impact tester is placed on the center of the floor mat 5 to be tested.
  • Each of the retractable legs 4 is adjusted to maintain the distance between the bottom of the test head and the surface of the floor mat 5 at a set value. And use the flat water beads 7 to maintain the level of the support platform 13.
  • a 0-shaped indicator ring is placed over the upper end of the drop shaft 1 to ensure that the distance between the indicator ring 9 and the upper end face 22 of the bearing bush is equal to the distance from the test head to the surface of the floor mat to be tested.
  • the distance is set to 0.7 m.
  • a ruler with a fixed length of 0.7 m can be prepared for easy measurement. The position of the indicator ring 9 is now the "zero point" position of the test.
  • the drop assembly When the switch 25 of the magnetic base 2 is rotated to the closed position, and the lower surface 24 of the magnetic base 2 is demagnetized, the drop assembly is free to fall onto the floor mat 5 by gravity. The drop assembly continues to move downward after the test head 6 hits the surface of the floor mat 5, and then quickly stops due to the cushioning action of the floor mat 5. The indicator ring 9 dropped with the drop assembly is blocked after encountering the upper end face 22 of the bearing bushing, and the drop shaft 1 continues to descend. Then, the drop shaft 1 is lifted until the upper surface of the test head 6 contacts the lower surface 24 of the magnetic base 2. When the switch 25 of the magnetic base 2 is rotated to the open position, the test head 6 is sucked. The distance of the indicator ring 9 relative to the initially set test zero is measured, which is the maximum distance the test head drops after it touches the floor mat. The smaller the distance, the better the impact resistance of the mat. Measure the distance and record the value to complete a test.
  • the scale can be marked on the drop axis 1 to read the value directly.
  • the lower surface 24 of the magnetic base 2 can be formed by the lower plane of the support platform 13. During the operation of the impact tester, the upper plane of the test head 6 directly contacts the lower plane of the support platform 13.
  • Figure 4 illustrates yet another embodiment of the present invention.
  • the structure of the impact tester is substantially the same as that of the embodiment shown in FIG. 1, but does not have a 0-shaped indicator ring 9, but is provided with an electronic portion for quantitatively measuring the impact of the test head, including installation in the test.
  • the acceleration sensor 16 inside the head, the processor 17 connected to the acceleration sensor 16 and processing the measurement signal of the acceleration sensor, has a display for displaying the measurement result processed by the processor and a control panel 15 for controlling the switch.
  • An aperture may be formed in the upper plane of the test head 6 to connect the cable of the acceleration sensor 16 and the processor 17 through. '
  • the operation of the impact tester of this embodiment is also similar to that of the previous embodiment.
  • the acceleration sensor 16 is shocked to generate an electrical signal which is transmitted to the microprocessor 17, which includes a signal conditioner 18, a low pass filter 19, an analog/digital Turn The converter 20, the sorting data, and the microcontroller 30 for performing mathematical calculations.
  • the voltage signal is sequentially adjusted, filtered, converted, sorted, and calculated, it is displayed as a digital signal on the control panel 15.
  • Figure 6 shows a flow chart of the signal processing procedure.
  • the impact resistance of the mat can be assessed by comparing the values of the test results with corresponding standard values.
  • the impact tester of this embodiment allows the operator to obtain test results faster, more conveniently, and more accurately.
  • the mounting handle 11 can be provided on the surface of the support platform 13.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

La présente invention concerne un appareil d’essai au choc qui comprend un support d’essai et un assemblage de chute. Le support d’essai comprend une partie supérieure plate de support et des pieds de support rétractables multiples qui sont reliés à la partie supérieure plate de support, et l’assemblage de chute comprend un axe de chute et une tête d’essai qui est reliée à l’extrémité inférieure de l’axe de chute.
PCT/CN2005/001752 2005-10-24 2005-10-24 Appareil d’essai au choc WO2007048271A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/001752 WO2007048271A1 (fr) 2005-10-24 2005-10-24 Appareil d’essai au choc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/001752 WO2007048271A1 (fr) 2005-10-24 2005-10-24 Appareil d’essai au choc

Publications (1)

Publication Number Publication Date
WO2007048271A1 true WO2007048271A1 (fr) 2007-05-03

Family

ID=37967386

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2005/001752 WO2007048271A1 (fr) 2005-10-24 2005-10-24 Appareil d’essai au choc

Country Status (1)

Country Link
WO (1) WO2007048271A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107202674A (zh) * 2017-05-02 2017-09-26 哈尔滨工程大学 U型舱横向加强抗冲击试验平台
US10527531B2 (en) 2017-01-24 2020-01-07 United States Gypsum Company Ball drop iris for vertical impact testing
CN114459653A (zh) * 2022-02-10 2022-05-10 广州德标检测有限公司 一种冲击能力自动测试仪及其测试方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU750308A1 (ru) * 1978-06-19 1980-07-23 Предприятие П/Я Г-4466 Устройство дл испытани изделий на удар
US5551279A (en) * 1995-10-06 1996-09-03 Quick; Donald C. Impact gauge
JP2001074594A (ja) * 1999-09-08 2001-03-23 Rion Co Ltd 球状衝撃源の保持構造及びそれを用いた衝撃力付与装置
JP2004257774A (ja) * 2003-02-24 2004-09-16 Fujitsu Ltd 落下試験装置
CN2653470Y (zh) * 2003-08-04 2004-11-03 厦门彩晶交通光学科技有限公司 冲击力测试仪

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU750308A1 (ru) * 1978-06-19 1980-07-23 Предприятие П/Я Г-4466 Устройство дл испытани изделий на удар
US5551279A (en) * 1995-10-06 1996-09-03 Quick; Donald C. Impact gauge
JP2001074594A (ja) * 1999-09-08 2001-03-23 Rion Co Ltd 球状衝撃源の保持構造及びそれを用いた衝撃力付与装置
JP2004257774A (ja) * 2003-02-24 2004-09-16 Fujitsu Ltd 落下試験装置
CN2653470Y (zh) * 2003-08-04 2004-11-03 厦门彩晶交通光学科技有限公司 冲击力测试仪

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10527531B2 (en) 2017-01-24 2020-01-07 United States Gypsum Company Ball drop iris for vertical impact testing
CN107202674A (zh) * 2017-05-02 2017-09-26 哈尔滨工程大学 U型舱横向加强抗冲击试验平台
CN114459653A (zh) * 2022-02-10 2022-05-10 广州德标检测有限公司 一种冲击能力自动测试仪及其测试方法
CN114459653B (zh) * 2022-02-10 2024-05-28 广州达欧技术检测有限公司 一种冲击能力自动测试仪及其测试方法

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