CN104198146B

CN104198146B - Agricultural material collision recovery coefficient test platform

Info

Publication number: CN104198146B
Application number: CN201410412089.2A
Authority: CN
Inventors: 王立军; 周文秀; 李兴星; 马继卿
Original assignee: Northeast Agricultural University
Current assignee: Northeast Agricultural University
Priority date: 2014-08-14
Filing date: 2014-08-14
Publication date: 2017-01-25
Anticipated expiration: 2034-08-14
Also published as: CN104198146A

Abstract

The invention discloses an agricultural material collision recovery coefficient test platform and belongs to physical property test devices. A mirror, a scale wall plate, a height adjusting rod, first and second electromagnetic valves, a support and a time-delay relay are arranged on a base, the mirror and the scale wall plate form a 135-degree included angle to be connected into a whole, the support is hinged to a collision wall plate through a pin shaft, angle adjusting screws A and B are arranged on two sides of the pin shaft on the support respectively, upper and lower supporting plates are disposed on the height adjusting rod, upper and lower adsorption tubes are installed on the upper and lower supporting plates respectively, an air-sucking pump is respectively communicated with the first and second electromagnetic valves through a connecting air tube, a high-speed camera is vertical to the scale wall plate, horizontal adjusting bolt groups are arranged at four corners of the base respectively, the platform can perform testing on collisions of agricultural materials in various forms and conditions and collisions among materials, the structure is novel and reasonable, the adaptive capacity is high, the application range is wide, the usage is reliable, and the test accuracy is high.

Description

Agricultural material collides recovery coefficient test platform

Technical field

The invention belongs to quantitative measurement equipment, relate generally to a kind of agricultural material collision recovery coefficient of bulk solid Test platform.

Background technology

In agricultural material field, collide the property that can return to reset condition after recovery coefficient reflects material collision deformation Can, it is united reaper cleaning vibration sieve and the basic data of precision drill parameter designing and performance evaluation.In addition, collision is extensive Complex coefficient is one of required most basic particle habit during discrete element software emulation, and the parameter being inputted during emulation is more accurate, The result then calculating output is more accurate.Some scholars both domestic and external obtain collision recovery coefficient to measure, and have made some by oneself and have touched Hit recovery coefficient test bed, enable that material height of drop is adjustable, that is, material impact velocity size is adjustable, however lack from Dynamic batch charging mechanism is it is impossible to be the movement of falling object when ensureing that material falls；The direction of the impact velocity of material cannot be changed；And it is real Experiment device can only measure acquisition collision situation in normal orientation for the material, analytical calculation recovery coefficient, tangentially touches for material Hit situation and total collision situation cannot obtain it is impossible to obtain its recovery coefficient.

Content of the invention

The purpose of the present invention is aiming at the problem that above-mentioned prior art exists, and design provides a kind of agricultural material collision extensive Complex coefficient test platform, is reached and can achieve and provide agricultural material to be collided with collision wallboard with friction speed and different directions Condition, accurately and timely measure the agricultural material forward and backward total, normal direction of collision and tangential on speed and accurately measure agriculture What industry material collided each other in the air collides forward and backward speed, adaptable purpose.

The object of the present invention is achieved like this: on base upper surface equipped mirror, scale wallboard, height regulating rod, First magnetic valve, the second magnetic valve, bracing frame and time-delay relay, described mirror is linked into an integrated entity with scale wallboard, mirror with Between scale wallboard, within angle α is 135 °, and described height regulating rod is located at the rear outside of scale wallboard, and support frame as described above is located at Scale wallboard front inner；Pass through bearing pin hinge installation shock wallboard on support frame as described above upper end, on bracing frame, be located at Bearing pin both sides position can move up and down the equipped angular adjustment screw rod a and angular adjustment screw rod b of regulation, described angular adjustment spiral shell The upper end of bar a, b is engaged with collision wallboard downside respectively；Described height regulating rod can be gone up from top to bottom successively The lower mobile installation mounting plate adjusting and bottom plate, are respectively mounted adsorption tube and lower adsorption tube on mounting plate and bottom plate, The two ends of upper aspiration pipe are connected on adsorption tube and the first magnetic valve, the two ends of lower aspiration pipe respectively with lower adsorption tube and Second magnetic valve connects, and time-delay relay is connected by wire respectively with the first magnetic valve, the second magnetic valve；Connect tracheae by aspiration Pump is connected with first and second magnetic valve respectively；High-speed camera and scale wallboard are in that orthogonal configuration is anterior in scale wallboard At the opposite site of inner side；It is respectively mounted horizontal adjustment bolt group at described base four corners position, so far constitute agricultural material and touch Hit recovery coefficient test platform.

The present invention overcome and avoid traditional agricultural material connected by cotton rope carry out testing collide restorer between material The problem of number test result poor accuracy, using the collision wallboard of adjustable for height upper and lower adsorption tube and tilt adjustable section Structure, can test to collision recovery coefficient between the collision of agricultural material various forms condition and material, be agricultural material Distinct element method research provide technical support, have novel in structural design reasonable, adaptable, applied widely, use Feature reliable, that measuring accuracy is high.

Brief description

Fig. 1 is agricultural material collision recovery coefficient test platform general structure schematic diagram；

Fig. 2 is the direction view of bowing of Fig. 1；

Fig. 3 is the structural representation after removing high-speed camera in Fig. 1；

Fig. 4 is the left-hand view of Fig. 1；

Fig. 5 is the seed collision rift speed schematic diagram of agricultural material；

Fig. 6 is the seed 3-D view that high-speed camera shoots.

In figure piece number illustrates:

1st, mirror, 2, scale wallboard, 3, bottom plate, 4, lower adsorption tube, 5, mounting plate, 6, upper absorption pipe, 7, height adjust Bar, 8, upper aspiration pipe, 9, lower aspiration pipe, 10, collision wallboard angular adjustment scale line, 11, collision wallboard, 12, bearing pin, 13, angle Degree adjusting screw rod a, 14, aspiration pump, 15, connect tracheae, the 16, first magnetic valve, the 17, second magnetic valve, 18, bracing frame, 19, prolong When relay, 20, base, 21, horizontal adjustment bolt group, 22, angular adjustment screw rod b, 23, high-speed camera.

Specific embodiment

Below in conjunction with the accompanying drawings embodiment of the present invention is described in detail.A kind of agricultural material collision recovery coefficient test Platform, is equipped with mirror 1, scale wallboard 2, height regulating rod 7, the first magnetic valve 16, the second magnetic valve on base 20 upper surface 17th, bracing frame 18 and time-delay relay 19, described mirror 1 and scale wallboard 2 link into an integrated entity, between mirror 1 and scale wallboard 2 Within angle α is 135 °, and described height regulating rod 7 is located at the rear outside of scale wallboard 2, and support frame as described above 18 is located at scale wallboard 2 front inner；Pass through bearing pin 12 hinge installation shock wallboard 11 on support frame as described above 18 upper end, on bracing frame 18, position The equipped angular adjustment screw rod a13 and angular adjustment screw rod b22 of regulation, described angle can be moved up and down in bearing pin 12 both sides position The upper end of degree adjusting screw rod a13, b22 is engaged with collision wallboard 11 downside respectively；On described height regulating rod 7 from Installation mounting plate 5 and the bottom plate 3 of regulation can be moved up and down under up to successively, mounting plate 5 and bottom plate 3 are respectively mounted Adsorption tube 6 and lower adsorption tube 4, the two ends of upper aspiration pipe 8 are connected on adsorption tube 6 and the first magnetic valve 16, lower aspiration The two ends of pipe 9 are connected with lower adsorption tube 4 and the second magnetic valve 17 respectively, wire by time-delay relay 19 respectively with the first magnetic valve 16th, the second magnetic valve 17 connects；Connect tracheae 15 to connect aspiration pump 14 respectively with first and second magnetic valve 16,17；High-speed camera Machine 23 and scale wallboard 2 are in orthogonal configuration at scale wallboard 2 front inner opposite site；In 20 4 jiaos of described base Position is respectively mounted horizontal adjustment bolt group 21.Described scale wallboard 2 interior sidewall surface is cooperated with collision wallboard 11 Setting collision wallboard angular adjustment scale line 10.

When colliding recovery coefficient between test material and material, first, first and second magnetic valve 16,17 broadly falls into connection shape State, by setting time time-delay relay 19, controls the first magnetic valve 16 and the second magnetic valve 17 to disconnect with regular hour difference, Wherein first magnetic valve 16 first disconnects, and material second magnetic valve 17 after the mouth of pipe free-falling of upper adsorption tube 6, certain time difference breaks Open, material collides from the mouth of pipe free-falling of lower adsorption tube 4, a certain position two agricultural material below lower adsorption tube 4, and Shot by high-speed camera 23, wherein require time delayses relay 19 can control time difference minimum by 0.1 second.

From fig. 5, it can be seen that because material has the scrambling (as corn kernel) of shape, the bounce-back of seed collision rift Direction is random it is assumed that the speed after material seed collision reaction is v, when high-speed camera is just to yz plane, Zhi Nengti Take movement velocity on this face for the material seed, i.e. v_zWith v_y, speed phase ratio error after the speed that is achieved in that and actual collision Can be very big, the sum velocity v of actual material collision rift also includes v_x, this speed is no only by traditional high-speed camera-shooting method Method obtains.In Fig. 6 experiment, mirror 1 is in 135 ° of angles with scale wallboard 2, and the putting position of high-speed camera 23 is just to scale Wallboard 2, now, by High-speed Photography Analysis not only can obtain material seed with scale wallboard 2 parallel surface (yz plane) on Speed vz and vy, mirror 1 image-forming principle can also be passed through, from mirror 1 inner obtain material seed with scale wallboard 2 vertical plane Speed vx in (xz plane) and vz, finally obtain space velocity v of material seed collision rift, greatly reduce experiment and survey Amount error, increased the accuracy of collision recovery coefficient test.

When in view of collision angle and impact velocity factor, by adjusting upper and lower supporting plate 5,3 on height regulating rod 7 Position, change upper and lower adsorption tube 6,4 height, realize the change of agricultural material height of drop；By angular adjustment screw rod a13 And b22, adjust collision wallboard 11 and horizontal plane between angle, realize agricultural material at different conditions with collision wallboard 11 Raw collision, and obtain the speed on different directions in agricultural material collision process by high-speed camera 23, finally by trying to achieve Speed ratio before and after collision, the collision recovery coefficient in acquisition normal direction, tangential and total direction.Collision wallboard angular adjustment scale line 10 with the cooperation of collision wallboard 11, to facilitate the accurate determination of angle between collision wallboard 11 and horizontal plane, meet not syn-collision The needs of condition.

Claims

1. a kind of agricultural material collision recovery coefficient test platform it is characterised in that: mirror is equipped with base (20) upper surface (1), scale wallboard (2), height regulating rod (7), the first magnetic valve (16), the second magnetic valve (17), bracing frame (18) and time delay Relay (19), described mirror (1) and scale wallboard (2) link into an integrated entity, within angle α between mirror (1) and scale wallboard (2) For 135 °, described height regulating rod (7) is located at the rear outside of scale wallboard (2), and support frame as described above (18) is located at scale wallboard (2) front inner；Pass through bearing pin (12) hinge installation shock wallboard (11) on support frame as described above (18) upper end, in bracing frame (18) upper, regulation can be moved up and down positioned at bearing pin (12) both sides position equipped angular adjustment screw rod a (13) and angular adjustment Screw rod b (22), the upper end of described angular adjustment screw rod a, b (13,22) is engaged with collision wallboard (11) downside respectively； Installation mounting plate (5) and the bottom plate (3) of regulation can be moved up and down successively from top to bottom on described height regulating rod (7), Adsorption tube (6) and lower adsorption tube (4) are respectively mounted on mounting plate (5) and bottom plate (3), the two ends of upper aspiration pipe (8) are respectively Be connected on adsorption tube (6) and the first magnetic valve (16), the two ends of lower aspiration pipe (9) respectively with lower adsorption tube (4) and second Magnetic valve (17) connects, and time-delay relay (19) is connected by wire respectively with the first magnetic valve (16), the second magnetic valve (17)；Even Aspiration pump (14) is connected by trachea (15) respectively with first and second magnetic valve (16,17)；High-speed camera (23) and scale wallboard (2) it is in orthogonal configuration at scale wallboard (2) front inner opposite site；In the punishment of described base (20) four corners position An Zhuan not horizontal adjustment bolt group (21).

2. agricultural material according to claim 1 collision recovery coefficient test platform it is characterised in that: in described scale wall In plate (2) interior sidewall surface and collision wallboard (11) cooperate setting collision wallboard angular adjustment scale line (10).