CN204694725U - The determinator of Hopkinson pressure bar system take-off lever speed - Google Patents
The determinator of Hopkinson pressure bar system take-off lever speed Download PDFInfo
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- CN204694725U CN204694725U CN201520403151.1U CN201520403151U CN204694725U CN 204694725 U CN204694725 U CN 204694725U CN 201520403151 U CN201520403151 U CN 201520403151U CN 204694725 U CN204694725 U CN 204694725U
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Abstract
The utility model belongs to measurement mechanism technical field, especially a kind of determinator of Hopkinson pressure bar system take-off lever speed is related to, it is characterized in that being provided with a laser velocimeter device between Hopkinson pressure bar system take-off lever end and absorbing rod, this laser velocimeter device comprises laser flip flop, fixes the speed measuring device main body of two flip flop equipments of this laser flip flop.The utility model has the practical value of height, can when warranty test result, and improve experimental precision, reduce experiment difficulty, accurately obtain the loss part of energy, the improvement for Hopkinson pressure bar test has original innovation characteristic.
Description
Technical field
The utility model belongs to measurement mechanism technical field, especially relates to a kind of determinator of Hopkinson pressure bar system take-off lever speed.
Background technology
At present, split hopkinson bar a kind ofly studies effective experiment of material dynamic mechanical performance under one-dimensional stress state and put.Since Kolsky in 1949 invents it and studied the existing a lot of improvement of this experimental provision since material dynamic mechanical performance under one-dimensional stress state with it, experimental technique improves constantly.Conventional Hopkinson pressure bar test device only has a set of velocity-measuring system, namely in input lever part, the kinetic energy of input lever is calculated by the velograph recorded, the namely gross energy of whole system, and the atlas analysis that the energy demand of take-off lever obtains from computing machine obtains, the difference of the two is exactly the energy acting on experiment test specimen, but due to the existence of systematic error and personal error, will bring certain mistake and error to the energy spectrometer of loss.Especially Hopkinson pressure bar test device accurately can not facilitate acquisition take-off lever energy, makes the error of experimental result larger.
Summary of the invention
The purpose of this utility model is to provide a kind of determinator that can facilitate the Hopkinson pressure bar system take-off lever speed of Accurate Determining take-off lever energy, this device can measure the speed of take-off lever on original measurement data basis, more accurately the distribution of energy in Hopkinson pressure bar test be can represent, thus explosive and the rock energy match problem of Practical Project instructed.
The purpose of this utility model is realized by following technical proposals:
The determinator of Hopkinson pressure bar system take-off lever speed of the present utility model, it is characterized in that being provided with a laser velocimeter device between Hopkinson pressure bar system take-off lever end and absorbing rod, this laser velocimeter device comprises laser flip flop, fixes the speed measuring device main body of two flip flop equipments of this laser flip flop.
Described speed measuring device main body comprises the main body bearing fixing with Hopkinson experimental provision base, be fixed on the stationary installation of this main body bearing upper end, described main body bearing upper center is provided with groove, second circular hole is respectively equipped with in these groove both sides, described stationary installation is provided with two first circular holes, two described first circular holes and two second circular holes form two circular holes respectively, the transmitter termination of laser flip flop and receiver termination are fixed in these two circular holes respectively, and Hopkinson pressure bar system take-off lever is through in described groove.
Advantage of the present utility model:
The determinator of Hopkinson pressure bar system take-off lever speed of the present utility model has the practical value of height, can when warranty test result, improve experimental precision, reduce experiment difficulty, accurately obtain the loss part of energy, the improvement for Hopkinson pressure bar test has original innovation characteristic.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the A direction view of the utility model Fig. 1.
Embodiment
Embodiment of the present utility model is further illustrated below in conjunction with accompanying drawing.
As illustrated in fig. 1 and 2, the determinator of Hopkinson pressure bar system take-off lever speed of the present utility model, it is characterized in that being provided with a laser velocimeter device between Hopkinson pressure bar system take-off lever 1 end and absorbing rod 5, this laser velocimeter device comprises laser flip flop 8, fixes the speed measuring device main body of two flip flop equipments of this laser flip flop 8.
Described speed measuring device main body comprises the main body bearing 7 fixing with Hopkinson experimental provision base, be fixed on the stationary installation 3 of this main body bearing 7 upper end, described main body bearing 7 upper center is provided with groove 6, second circular hole is respectively equipped with in these groove 6 both sides, described stationary installation is provided with two first circular holes, two described first circular holes and two second circular holes form two circular holes respectively, the transmitter termination 2 of laser flip flop and receiver termination 4 are fixed in these two circular holes respectively, Hopkinson pressure bar system take-off lever 1 is through in described groove 6.
The utility model improves on the basis of existing Hopkinson experimental provision, and the mode taked installs laser velocimeter device, two flip flop equipments of fixed laser trigger at the end of Hopkinson pressure bar system take-off lever 1.The mistiming of a signal is had between laser flip flop, its value is that Hopkinson pressure bar system take-off lever 1 measures run duration interval T by laser velocimeter device (generating laser and laser pickoff composition), measure distance L therebetween, because the distance between laser instrument is short, and the time is shorter, according to Differential Principle, approximate for this instantaneous velocity can be thought average velocity, the ratio of available range L and time T represents this speed V, in the mass M of known pole, obtain the momentum P of take-off lever end, and then try to achieve kinetic energy E.So just dump energy E ' can be drawn.Concrete theoretical formula is as follows:
（1）
（2）
（3）
In formula: the speed of V-take-off lever, m/s.
Distance between L-trigger, m.
The mistiming that T-trigger time records, s.
The momentum of P-take-off lever, kgm/s.
The energy of E-take-off lever, J.
In this laser velocimeter device, Hopkinson pressure bar system take-off lever 1 just in time can pass through between speed measuring device, and the centre-height of Hopkinson pressure bar system take-off lever 1 and the centre-height of speed measuring device are in same level; Speed measuring device can the speed of Measurement accuracy Hopkinson pressure bar system take-off lever 1, by physical equation and energygram analysis of spectrum, obtains the distribution condition of energy in whole system, and then carry out mating of study of rocks and explosive energy.The determinator of Hopkinson pressure bar system take-off lever speed of the present utility model has the practical value of height, can when warranty test result, improve experimental precision, reduce experiment difficulty, accurately obtain the loss part of energy, the improvement for Hopkinson pressure bar test has original innovation characteristic.
Claims (2)
1. the determinator of a Hopkinson pressure bar system take-off lever speed, it is characterized in that being provided with a laser velocimeter device between Hopkinson pressure bar system take-off lever end and absorbing rod, this laser velocimeter device comprises laser flip flop, fixes the speed measuring device main body of two flip flop equipments of this laser flip flop.
2. the determinator of Hopkinson pressure bar system take-off lever speed according to claim 1, it is characterized in that described speed measuring device main body comprises the main body bearing fixing with Hopkinson experimental provision base, be fixed on the stationary installation of this main body bearing upper end, described main body bearing upper center is provided with groove, second circular hole is respectively equipped with in these groove both sides, described stationary installation is provided with two first circular holes, two described first circular holes and two second circular holes form two circular holes respectively, the transmitter termination of laser flip flop and receiver termination are fixed in these two circular holes respectively, Hopkinson pressure bar system take-off lever is through in described groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520403151.1U CN204694725U (en) | 2015-06-12 | 2015-06-12 | The determinator of Hopkinson pressure bar system take-off lever speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520403151.1U CN204694725U (en) | 2015-06-12 | 2015-06-12 | The determinator of Hopkinson pressure bar system take-off lever speed |
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| CN204694725U true CN204694725U (en) | 2015-10-07 |
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| CN201520403151.1U Active CN204694725U (en) | 2015-06-12 | 2015-06-12 | The determinator of Hopkinson pressure bar system take-off lever speed |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771330A (en) * | 2017-01-16 | 2017-05-31 | 李嘉雯 | For the INTELLIGENT TACHOMETER of Hopkinson pressure bar experiment |
| CN110987666A (en) * | 2019-11-20 | 2020-04-10 | 南京理工大学 | Method for eliminating partial system errors in SHPB test |
-
2015
- 2015-06-12 CN CN201520403151.1U patent/CN204694725U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771330A (en) * | 2017-01-16 | 2017-05-31 | 李嘉雯 | For the INTELLIGENT TACHOMETER of Hopkinson pressure bar experiment |
| CN106771330B (en) * | 2017-01-16 | 2018-04-13 | 李嘉雯 | INTELLIGENT TACHOMETER for Hopkinson pressure bar experiment |
| CN110987666A (en) * | 2019-11-20 | 2020-04-10 | 南京理工大学 | Method for eliminating partial system errors in SHPB test |
| CN110987666B (en) * | 2019-11-20 | 2022-03-15 | 南京理工大学 | Method for eliminating partial system errors in SHPB test |
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| C14 | Grant of patent or utility model | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Angang Group Mine Company |