CN102435524B - Calibration method and apparatus for pendulum impact testing machine - Google Patents
Calibration method and apparatus for pendulum impact testing machine Download PDFInfo
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- CN102435524B CN102435524B CN 201110279591 CN201110279591A CN102435524B CN 102435524 B CN102435524 B CN 102435524B CN 201110279591 CN201110279591 CN 201110279591 CN 201110279591 A CN201110279591 A CN 201110279591A CN 102435524 B CN102435524 B CN 102435524B
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- 238000009863 impact test Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 56
- 230000005484 gravity Effects 0.000 claims description 9
- 239000012634 fragment Substances 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
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- 230000007812 deficiency Effects 0.000 description 2
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Abstract
The invention provides a calibration method and apparatus for a pendulum impact testing machine, relating to technology of measurement and calibration. The calibration method comprises the following steps: step 1, carrying out calibration by using the calibration apparatus for the pendulum impact testing machine; 2, carrying out the following procedures for calibration: aligning a hit vertex of the pendulum impact testing machine to be calibrated with a designated hit point of the calibration apparatus for the pendulum impact testing machine, adjusting the height of a pendulum of the pendulum impact testing machine to be calibrated, wherein, the height corresponds to impact energy, an indicated value E0 of which is obtained through calculation, resetting the calibration apparatus for the pendulum impact testing machine, starting the pendulum impact testing machine to be calibrated, reading an actual measurement value E1 of impact energy on an indication plate of the calibration apparatus for the pendulum impact testing machine, and analyzing the value of Edelta, wherein, Edelta satisfies the equation of Edelta=E0-E1. The calibration apparatus comprises a base plate, a vertical rack, a vertical swing rod, a rod shaft and an indication reading means. According to the invention, impact energy can be measured directly, actual measurement of energy loss caused by frictional resistance when the pendulum of the pendulum impact testing machine to be calibrated swings can be realized, and accuracy is improved.
Description
Technical field
The present invention relates to the measurement and calibration technology, especially a kind of method and device that balance weight impact testing machine is calibrated.
Background technology
Balance weight impact testing machine is a kind of device of simulating impact energy and product being tested.As the degree of heel withstand shock, test by balance weight impact testing machine, and according to law of conservation of energy E
Gesture=E
Moving-E
Loss, obtain needed impact kinetic energy by the height of adjusting pendulum.
Figure 1 shows that balance weight impact testing machine (heel fatigue impact testing machine).One fork 2 is installed on the support 1, the fastening pendulum 3 in the lower end of fork 2, the pendulum of certain mass is done to swing under Action of Gravity Field and is fallen, bump is positioned at the bump summit (such as heel 4) under the pendulum system, can directly read the energy that is knocked the summit and is hit (indicating value on the scale according to E=mgh by calculating) on scale 5.By adjusting the falling height of pendulum, can obtain being knocked the different energy that are hit on the summit, and from scale, directly read.
To the calibration of above-mentioned balance weight impact testing machine energy test, the quality that originally (prior art) generally adopts and measurement is put and falling height and the method that compares by the energy value that calculates realize.There is following deficiency in this calibration steps:
The first, the centre of gravity definition of pendulum acquires a certain degree of difficulty, and the centre of gravity definition that produces easily pendulum is not accurate enough, even error is larger.Because balance weight impact testing machine shown in Figure 1, the quality of fork can not be ignored, and the body of pendulum also is related to the centre of gravity definition of pendulum.
The second, oscillator system belongs to physical construction, and the friction force that pendulum is subject in swing is larger, and this friction force institute work (being energy) is difficult to calculate and deduction, and the value that causes simulating produces deviation.
The 3rd, can not directly measure energy values, but the result (E that the quality by measuring pendulum and falling height calculate again
Gesture=mgh).
Summary of the invention
The present invention is intended to overcome the above-mentioned deficiency of prior art, and a kind of calibration steps and device of balance weight impact testing machine is provided.It can directly measure impact energy, need not calculate, and need not to find out the centre of gravity place of pendulum, simultaneously, the energy loss that frictional resistance caused the when pendulum of the balance weight impact testing machine of being imitated swings by actual measurement out, accuracy improves.
For this reason, the technical scheme of the calibration steps of balance weight impact testing machine of the present invention and device is as follows:
The calibration steps of balance weight impact testing machine of the present invention comprises: one, calibrate by the calibrating installation of balance weight impact testing machine, and the calibrating installation of balance weight impact testing machine is by demarcating; Its two, calibration steps is:
One, will be aimed at by the bump summit of the balance weight impact testing machine in school the appointment rum point of the calibrating installation of balance weight impact testing machine;
Two, adjust by the pendulum height of the balance weight impact testing machine in school, this highly corresponding impact energy draws indicated value E as calculated
0(according to E
0=mgh);
Three, the reading indication on the dial plate of calibrating installation of balance weight impact testing machine is made zero;
Four, start by the balance weight impact testing machine in school, make its pendulum fall described appointment rum point on the calibrating installation of bump balance weight impact testing machine, read the measured value E of impact energy from the dial plate of the calibrating installation of balance weight impact testing machine
1
Five, analyze E
⊿=E
0-E
1Value, E
⊿The numerical value that is less than or equal to standard, qualified by the metering of the balance weight impact testing machine impact energy in school, otherwise, defective by the metering of the balance weight impact testing machine impact energy in school.
The calibrating installation of balance weight impact testing machine of the present invention, comprise horizontally disposed bedplate, setting is fixedly arranged on the vertical frame on the bedplate, the vertical pendulum bar, horizontally disposed bar axle and indication reading device, the bar axle is located between two described vertical frames, and corresponding described vertical frame is all stretched out to surpass the position of corresponding described vertical frame in the two ends of bar axle, the bar axle can rotate in the vertical plane perpendicular to the length direction of bar axle, vertical pendulum bar suspension type is arranged on the wherein end of bar axle and fastening with the bar axle, when being subject to clashing into as the lower end of free-ended vertical pendulum bar, the vertical pendulum bar can be centered by the bar axle swings in the vertical plane perpendicular to the length direction of bar axle, and the bar axle rotates simultaneously; The other end of bar axle is referred to as to install the installation end of indication reading device with the installation of indicating reading device, this end of bar axle;
Described indication reading device is the pointer rotational structure, comprise dial plate, A pointer, peak value pointer, peak value pointer shaft and peak value pointer shaft erecting frame, the plate face of dial plate and A pointer rotate the vertical plane at place and parallel the setting of vertical plane that the peak value pointer rotates the place, and they are all perpendicular to the length direction of bar axle; One end of A pointer is the center of rotation end, and the other end pushes away end for hitting of bump peak value pointer rotation, and the installation end of the described installation indication reading device of the center of rotation end of A pointer and bar axle is fastening, can do in company with the bar axle rotation of concentric; One end of peak value pointer is the center of rotation end, the other end is the peak value that the indication end swings with indication vertical pendulum bar, the center of rotation end of peak value pointer is movably arranged in described peak value pointer shaft, the central axis of the central axis of described peak value pointer shaft and bar axle is positioned on the same horizontal linear, described peak value pointer shaft is installed in described peak value pointer shaft support, described peak value pointer shaft support is installed in vertical frame, the indication end of peak value pointer is the arc of the plate face that bends towards dial plate and extends through the rotational plane of A pointer, force hitting of A pointer to push away end and push away the indication end of hitting the peak value pointer, cause the peak value pointer to rotate take described peak value pointer shaft as axle; Be shaped with on the plate face of dial plate with the joint of bar axle is the size of the corresponding impact energy fallen from the place height by the pendulum of school balance weight impact testing machine with direct indication of the radially marking line in the center of circle;
Be fixedly mounted with a shell fragment in the lower end of vertical pendulum bar, be provided with the appointment rum point at shell fragment.
At the leveling bubble of bedplate installation level-off, guarantee that bedplate is in the horizontal positioned state.
The calibrating installation of balance weight impact testing machine of the present invention must can be used for the calibration balance weight impact testing machine through demarcating.
The scaling method of the calibrating installation of balance weight impact testing machine of the present invention is as follows:
With the standard pendulum with rope hanging on the hitch point that is positioned on the surface level of specifying 2000mm above the rum point, adjust suspension, make standard pendulum maintenance level, during the calibrating installation of bump balance weight impact testing machine, guarantee vertically to clash into the described appointment rum point (each carries out bump highly at least 4 times) of vertical pendulum bar lower end of the calibrating installation of balance weight impact testing machine; Different impact energys when highly obtaining to clash into by the difference bump of adjusting the standard pendulum, its impact energy can calculate according to E=mgh, and wherein, m is the quality of standard pendulum, and h is the height that the standard pendulum falls bump, and g is local acceleration of gravity; Thereby obtain the sign scale of different impact energys at the plate face of the dial plate of the sign reading device of the calibrating installation of balance weight impact testing machine.
Compare with prior art, the invention has the beneficial effects as follows: one, can directly measure impact energy, need not calculate, need not to find out the centre of gravity place of pendulum, directly perceived applicable.Its two, the calibrating installation of balance weight impact testing machine of the present invention is by demarcating, the principle of its demarcation is to be undertaken by the standard value that calculates impact energy with different falling heights with the quality of establishing criteria pendulum, has suitable accuracy.Its three, the calibration steps of balance weight impact testing machine of the present invention is partly drawn in the resistance of the balance weight impact testing machine that is calibrated in the actual measurement, accuracy improves.Its four, the calibrating installation of balance weight impact testing machine of the present invention is simple in structure, is convenient to make, long service life is convenient to promote.
Description of drawings
Fig. 1 is balance weight impact testing machine (heel fatigue impact testing machine) synoptic diagram;
Fig. 2 is hammering blow device calibrating installation synoptic diagram of the present invention;
Fig. 3 is indication reading device synoptic diagram (cut-open view).
Among the figure: 100, balance weight impact testing machine; 1, support; 2, fork; 3, pendulum; 4, heel; 5, scale; 6, bedplate; 7, vertical frame; 8; The vertical pendulum bar; 9, bar axle; 10, specify rum point; 11, indication reading device; 12, dial plate; 13, A pointer; 14, peak value pointer; 15, peak value pointer shaft; 16, peak value pointer shaft erecting frame, 17, marking line; 18, the installation end of indication reading device is installed; 200, the calibrating installation of balance weight impact testing machine.
Embodiment
Below, introduce by reference to the accompanying drawings the specific embodiment of the present invention.
Such as Fig. 1, Fig. 2 and shown in Figure 3, the calibration steps of balance weight impact testing machine of the present invention comprises: one, calibrate by the calibrating installation 200 of balance weight impact testing machine, and the calibrating installation 200 of balance weight impact testing machine is by demarcating; Its two, calibration steps is:
One, will be aimed at by the bump summit of the balance weight impact testing machine 100 in school the appointment rum point 10 of the calibrating installation 200 of balance weight impact testing machine;
Two, adjust by the height of the pendulum 3 of the balance weight impact testing machine 100 in school, this highly corresponding impact energy draws indicated value E as calculated
0(according to E
0=mgh);
Three, the reading indication on the dial plate 12 of calibrating installation 200 of balance weight impact testing machine is made zero;
Four, start by the balance weight impact testing machine 100 in school, make its pendulum 3 fall described appointment rum point 10 on the calibrating installation 200 of bump balance weight impact testing machine, read the measured value E of impact energy from the dial plate 12 of the calibrating installation 200 of balance weight impact testing machine
1
Five, analyze E
⊿=E
0-E
1Value, E
⊿The numerical value that is less than or equal to standard, qualified by the metering of the balance weight impact testing machine impact energy in school, otherwise, defective by the metering of the balance weight impact testing machine impact energy in school.
Above-mentioned calibration steps carries out under 10-30 ℃ environment.
As shown in Figures 2 and 3, the calibrating installation 200 of balance weight impact testing machine of the present invention, comprise horizontally disposed bedplate 6, setting is fixedly arranged on the vertical frame 7 on the bedplate 6, vertical pendulum bar 8, horizontally disposed bar axle 9 and indication reading device 11, bar axle 9 is located between two described vertical frames 7, and corresponding described vertical frame 7 is all stretched out at the two ends of bar axle 9, and (so-called " surpassing " namely stretches out enough length with the position above corresponding described vertical frame 7, so that vertical pendulum bar 8 and indication reading device 11 are installed respectively at the two ends of bar axle 9), bar axle 9 can rotate in the vertical plane perpendicular to the length direction of bar axle 9, vertical pendulum bar 8 suspension types are arranged on the wherein end of bar axle 9 and fastening with bar axle 9, when being subject to clashing into as the lower end of free-ended vertical pendulum bar 8, vertical pendulum bar 8 can be centered by bar axle 9 swings in the vertical plane perpendicular to the length direction of bar axle 9, and bar axle 9 rotates simultaneously; The other end of bar axle 9 is referred to as to install the installation end 18 of indication reading device with the installation of indicating reading device 11, this end of bar axle 9.
Described indication reading device 11 is the pointer rotational structure, comprise dial plate 12, A pointer 13, peak value pointer 14, peak value pointer shaft 15 and peak value pointer shaft erecting frame 16, the plate face of dial plate 12 and A pointer 13 rotates the vertical plane at places and parallel the setting of vertical plane that peak value pointer 14 rotates places, and they are all perpendicular to the length direction of bar axle 9; One end of A pointer 13 is the center of rotation end, and the other end pushes away end for bump peak value pointer 14 hitting of rotation, and the installation end 18 of the described installation indication reading device of the center of rotation end of A pointer 13 and bar axle 9 is fastening, can do in company with bar axle 9 rotation of concentric; One end of peak value pointer 14 is the center of rotation end, the other end is the peak value that the indication end swings with indication vertical pendulum bar 8, the center of rotation end of peak value pointer 14 is movably arranged in described peak value pointer shaft 15, the central axis of the central axis of described peak value pointer shaft 15 and bar axle 9 is positioned on the same horizontal linear, described peak value pointer shaft 15 is installed in described peak value pointer shaft support 16, described peak value pointer shaft support 16 is installed in vertical frame 7, the indication end of peak value pointer 14 is the arc of the plate face that bends towards dial plate 12 and extends through the rotational plane of A pointer 13, force hitting of A pointer 13 to push away end and push away the indication end of hitting peak value pointer 14, cause peak value pointer 14 to rotate take described peak value pointer shaft 15 as axle; Be shaped with on the plate face of dial plate 12 with the joint of bar axle 9 is the size of the corresponding impact energy fallen from the place height by the pendulum 4 of school balance weight impact testing machine 100 with direct indication of the radially marking line in the center of circle.
Be fixedly mounted with a shell fragment in the lower end of vertical pendulum bar 8, be provided with at shell fragment and specify rum point 10.
At the leveling bubble of bedplate 6 installation level-ofves, guarantee that bedplate 6 is in the horizontal positioned state.
The calibrating installation 200 of balance weight impact testing machine of the present invention must can be used for calibration balance weight impact testing machine 100 through demarcating.
The scaling method of the calibrating installation 200 of balance weight impact testing machine of the present invention is as follows:
With the standard pendulum with rope hanging on the hitch point that is positioned on the surface level of specifying 2000mm above the rum point 10, adjust suspension, make standard pendulum maintenance level, during the calibrating installation 200 of bump balance weight impact testing machine, guarantee vertically to clash into the balance weight impact testing machine calibrating installation vertical pendulum bar 8 lower ends described appointment rum point 10(each carry out highly at least bump 4 times); Different impact energys when highly obtaining to clash into by the difference bump of adjusting the standard pendulum, its impact energy can calculate according to E=mgh, and wherein, m is the quality of standard pendulum, and h is the height that the standard pendulum falls bump, and g is local acceleration of gravity; Thereby obtain the sign scale of different impact energys at the plate face of the dial plate 12 of the sign reading device 11 of the calibrating installation 200 of balance weight impact testing machine.
Calibrate or it is carried out timing signal at the calibrating installation 200 that uses balance weight impact testing machine, bedplate 6 must be transferred to level (by leveling bubble).
The above only is preferred embodiment of the present invention, is not that technical scope of the present invention is imposed any restrictions.The technician of the industry, under the inspiration of the technical program, can make some distortion and revise, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any modification, equivalent variations and modification that above embodiment does.
Claims (1)
1. the calibrating installation of balance weight impact testing machine, it is characterized in that: comprise horizontally disposed bedplate, setting is fixedly arranged on the vertical frame on the bedplate, the vertical pendulum bar, horizontally disposed bar axle and indication reading device, the bar axle is located between two described vertical frames, and corresponding described vertical frame is all stretched out to surpass the position of corresponding described vertical frame in the two ends of bar axle, the bar axle can rotate in the vertical plane perpendicular to the length direction of bar axle, vertical pendulum bar suspension type is arranged on the wherein end of bar axle and fastening with the bar axle, when being subject to clashing into as the lower end of free-ended vertical pendulum bar, the vertical pendulum bar can be centered by the bar axle swings in the vertical plane perpendicular to the length direction of bar axle, and the bar axle rotates simultaneously; The other end of bar axle is installed with the indication reading device, and this end of bar axle is referred to as to install the installation end of indication reading device;
Described indication reading device is the pointer rotational structure, comprise dial plate, A pointer, peak value pointer, peak value pointer shaft and peak value pointer shaft erecting frame, the plate face of dial plate and A pointer rotate the vertical plane at place and parallel the setting of vertical plane that the peak value pointer rotates the place, and they are all perpendicular to the length direction of bar axle; One end of A pointer is the center of rotation end, and the other end pushes away end for hitting of bump peak value pointer rotation, and the installation end of the described installation indication reading device of the center of rotation end of A pointer and bar axle is fastening, can do in company with the bar axle rotation of concentric; One end of peak value pointer is the center of rotation end, the other end is the peak value that the indication end swings with indication vertical pendulum bar, the center of rotation end of peak value pointer is movably arranged in described peak value pointer shaft, the central axis of the central axis of described peak value pointer shaft and bar axle is positioned on the same horizontal linear, described peak value pointer shaft is installed in described peak value pointer shaft erecting frame, described peak value pointer shaft erecting frame is installed in vertical frame, the indication end of peak value pointer is the arc of the plate face that bends towards dial plate and extends through the rotational plane of A pointer, force hitting of A pointer to push away end and push away the indication end of hitting the peak value pointer, cause the peak value pointer to rotate take described peak value pointer shaft as axle; Be shaped with on the plate face of dial plate with the joint of bar axle is the size of the corresponding impact energy fallen from the place height by the pendulum of school balance weight impact testing machine with direct indication of the radially marking line in the center of circle;
Be fixedly mounted with a shell fragment in the lower end of vertical pendulum bar, be provided with the appointment rum point at shell fragment.
2. the calibrating installation of balance weight impact testing machine according to claim 1 is characterized in that: the leveling bubble that level-off is installed at bedplate.
3. the scaling method of the calibrating installation of claim 1 or 2 described balance weight impact testing machines, it is characterized in that: with the standard pendulum with rope hanging on the hitch point that is positioned on the surface level of specifying 2000mm above the rum point, adjust suspension, make standard pendulum maintenance level, when clashing into the calibrating installation of balance weight impact testing machine, guarantee vertically to clash into the described appointment rum point of vertical pendulum bar lower end of the calibrating installation of balance weight impact testing machine, each carries out bump highly at least 4 times; Different impact energys when highly obtaining to clash into by the difference bump of adjusting the standard pendulum, its impact energy can calculate according to E=mgh, and wherein, m is the quality of standard pendulum, and h is the height that the standard pendulum falls bump, and g is local acceleration of gravity; Thereby obtain the sign scale of different impact energys at the plate face of the dial plate of the indication reading device of the calibrating installation of balance weight impact testing machine.
4. the calibration steps of balance weight impact testing machine, it is characterized in that, comprise: one, calibrating installation by the balance weight impact testing machine described in claim 1 or 2 is calibrated, and the calibrating installation of this balance weight impact testing machine the scaling method of the calibrating installation by balance weight impact testing machine claimed in claim 3 demarcate; Its two, calibration steps is:
One, will be aimed at by the bump summit of the balance weight impact testing machine in school the appointment rum point of the calibrating installation of this balance weight impact testing machine;
Two, adjust by the pendulum height of the balance weight impact testing machine in school, this highly corresponding impact energy draws indicated value E as calculated
0
Three, the reading indication on the dial plate of calibrating installation of this balance weight impact testing machine is made zero;
Four, start by the balance weight impact testing machine in school, make its pendulum fall described appointment rum point on the calibrating installation of this balance weight impact testing machine of bump, read the measured value E of impact energy from the dial plate of the calibrating installation of this balance weight impact testing machine
1
Five, analyze E
⊿=E
0-E
1Value, E
⊿The numerical value that is less than or equal to standard, qualified by the metering of the balance weight impact testing machine impact energy in school, otherwise, defective by the metering of the balance weight impact testing machine impact energy in school.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110279591 CN102435524B (en) | 2011-09-20 | 2011-09-20 | Calibration method and apparatus for pendulum impact testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110279591 CN102435524B (en) | 2011-09-20 | 2011-09-20 | Calibration method and apparatus for pendulum impact testing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102435524A CN102435524A (en) | 2012-05-02 |
| CN102435524B true CN102435524B (en) | 2013-05-29 |
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ID=45983700
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|---|---|---|---|
| CN 201110279591 Expired - Fee Related CN102435524B (en) | 2011-09-20 | 2011-09-20 | Calibration method and apparatus for pendulum impact testing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110865207A (en) * | 2019-11-25 | 2020-03-06 | 天津大学 | On-site calibration device of vibration acceleration monitoring equipment of ocean platform structure |
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| CN102944373B (en) * | 2012-11-03 | 2015-05-13 | 无锡市计量测试中心 | Method for measuring absorption energy of pendulum impact tester and puncture tester by weight method |
| CN104048885B (en) * | 2014-06-25 | 2017-04-12 | 东北大学 | Pendulum bob type shearing-resistant impact testing machine and testing method thereof |
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| CN105092200B (en) * | 2015-09-01 | 2017-07-28 | 辽宁工业大学 | Car engine start shock measuring system |
| CN106197931A (en) * | 2016-07-08 | 2016-12-07 | 济南时代试金试验机有限公司 | A kind of indicator device of shock machine |
| CN107687929A (en) * | 2017-08-28 | 2018-02-13 | 广东小天才科技有限公司 | Drop test equipment, method and device |
| CN107655821B (en) * | 2017-11-14 | 2024-06-04 | 苏州市职业大学 | Frequency modulation balancing device for changing free attenuation frequency on low-frequency mechanical spectrometer |
| CN109540675A (en) * | 2018-12-14 | 2019-03-29 | 交通运输部公路科学研究所 | A kind of device and method for evaluating and testing falling sphere body localized contact characteristic |
| CN110823489A (en) * | 2019-11-19 | 2020-02-21 | 中国航发贵州黎阳航空动力有限公司 | Weighing device of pendulum of impact testing machine |
| CN114427947A (en) * | 2022-01-30 | 2022-05-03 | 重庆长安汽车股份有限公司 | Shock resistance testing method for suspension system |
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|---|---|---|---|---|
| CN2705786Y (en) * | 2004-01-17 | 2005-06-22 | 钢铁研究总院 | Swinging hammer type impact tester sample |
| CN2750304Y (en) * | 2004-07-20 | 2006-01-04 | 甄业盛 | Pendulum impact tester |
| CN100516806C (en) * | 2007-05-16 | 2009-07-22 | 中国船舶重工集团公司第十二研究所 | Impact machine direct testing method and dedicated standard impact body |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MY136233A (en) * | 2002-11-18 | 2008-08-29 | Univ Putra Malaysia | Pendulum impact test rig |
-
2011
- 2011-09-20 CN CN 201110279591 patent/CN102435524B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2705786Y (en) * | 2004-01-17 | 2005-06-22 | 钢铁研究总院 | Swinging hammer type impact tester sample |
| CN2750304Y (en) * | 2004-07-20 | 2006-01-04 | 甄业盛 | Pendulum impact tester |
| CN100516806C (en) * | 2007-05-16 | 2009-07-22 | 中国船舶重工集团公司第十二研究所 | Impact machine direct testing method and dedicated standard impact body |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110865207A (en) * | 2019-11-25 | 2020-03-06 | 天津大学 | On-site calibration device of vibration acceleration monitoring equipment of ocean platform structure |
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Address after: 523000 No. 2 Niushan Niuheng Industrial Zone, Dongcheng Street, Dongguan City, Guangdong Province Patentee after: Dongguan high quality measurement technology service Co.,Ltd. Address before: 523128 Residential Committee Office Building of Niushan New Village, Dongcheng District, Dongguan City, Guangdong Province Patentee before: DONGGUAN HIGH-TECHNOLOGY GOODS DETECTION SERVICESCO., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 |