CN112919006A - Coal passing density detection device and use method thereof - Google Patents

Coal passing density detection device and use method thereof Download PDF

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Publication number
CN112919006A
CN112919006A CN202110334223.1A CN202110334223A CN112919006A CN 112919006 A CN112919006 A CN 112919006A CN 202110334223 A CN202110334223 A CN 202110334223A CN 112919006 A CN112919006 A CN 112919006A
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coal
telescopic pipe
detection device
fixed
density detection
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CN112919006B (en
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袁景
张宇航
梁晓瑾
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Liaoning Technical University
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Liaoning Technical University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/60—Arrangements for supporting or guiding belts, e.g. by fluid jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G45/00—Lubricating, cleaning, or clearing devices
    • B65G45/10—Cleaning devices
    • B65G45/18—Cleaning devices comprising brushes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/04—Bulk
    • B65G2201/045—Sand, soil and mineral ore
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
    • B65G2203/02—Control or detection
    • B65G2203/0208—Control or detection relating to the transported articles
    • B65G2203/0258—Weight of the article

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  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
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Abstract

The invention discloses a coal passing density detection device and a using method thereof, wherein the coal passing density detection device comprises a first roller frame, a second roller frame is fixed on the first roller frame, a carrier roller is rotatably arranged on the inner side of the second roller frame, a conveying belt is arranged on the carrier roller, a second telescopic pipe is fixed on the side surface of the first roller frame, a first telescopic pipe is arranged at the upper end of the inner side of the second telescopic pipe, a support plate is fixed on the first telescopic pipe, and the front surface of the support plate is rotatably connected with an adjusting screw rod through a bearing seat; through setting up wired laser scanning head, first flexible pipe, the flexible pipe of second, adjust stay cord, adjusting screw, fixture block, connecting block and connecting plate, be convenient for avoid measuring and calculating the inconvenience to the coal volume, later stage needs measure its volume alone, and device simple structure can adjust the height and the horizontal position of line laser scanning head according to actual need.

Description

Coal passing density detection device and use method thereof
Technical Field
The invention belongs to the technical field of coal passing density detection, and particularly relates to a coal passing density detection device and a using method thereof.
Background
Coal is a solid combustible mineral formed gradually by ancient plants buried underground and undergoing complex biochemical and physicochemical changes. Coal is generally conveyed by a carrier roller conveying belt in the conveying process, and a belt conveying system plays a leading role in material conveying in various fields (such as systems of ports, electric power, coal, metallurgy and the like).
The existing coal is conveyed through a conveying belt, the density of conveyed coal is inconvenient to detect, the volume of the coal needs to be measured independently in the later period, the using effect is poor, in addition, the conveying carrier roller is not convenient to clean, coal dust adheres to the surface of the conveying carrier roller, the belt and the conveying carrier roller can be caused to slip, and therefore the coal density detection device and the using method thereof are provided.
Disclosure of Invention
The invention aims to provide a coal passing density detection device and a use method thereof, and aims to solve the problems that the density of conveyed coal is inconvenient to detect in the conveying process of the conventional coal through a conveying belt, the volume of the coal needs to be measured separately in the later period, the use effect is poor, the conveying carrier roller is not convenient to clean well, and coal dust adheres to the surface of the conveying carrier roller, so that the belt and the conveying carrier roller slip.
In order to achieve the purpose, the invention provides the following technical scheme: a coal density detection device comprises a first roller frame, a second roller frame is fixed on the first roller frame, a carrier roller is rotatably arranged on the inner side of the second roller frame, a conveying belt is arranged on the carrier roller, a second telescopic pipe is fixed on the side surface of the first roller frame, a first telescopic pipe is arranged at the upper end of the inner side of the second telescopic pipe, a support plate is fixed on the first telescopic pipe, the front surface of the support plate is rotatably connected with an adjusting screw rod through a bearing seat, a connecting block is sleeved on the outer side of the adjusting screw rod and is in matched connection with the adjusting screw rod through a thread part, a connecting plate is fixed on the lower surface of the connecting block, a guide groove is formed in the connecting plate, the support plate and the connecting plate are in matched connection through the guide groove, a wire laser scanning head is fixed on the lower surface of the connecting plate, and installation grooves are, the adjustable telescopic pipe is characterized in that a spring is fixed on the inner side of the mounting groove, a clamping block is fixed at one end of the spring, an adjusting pull rope is arranged on one side wall of the clamping block and penetrates through the upper surface of the first telescopic pipe, a clamping groove is formed in the inner side of the second telescopic pipe, and the clamping block is connected with the second telescopic pipe in a matched mode through the clamping groove.
Preferably, an installation plate is fixed on the front surface of the second carrier roller frame through screws, a rubber block is fixed at the upper end of the installation plate, bristles are fixed on the rubber block, and the bristles are in contact with the carrier rollers.
Preferably, the mounting plate is rectangular, and the number of the mounting plates is equal to that of the carrier rollers.
Preferably, a rotary handle is fixed at one end of the adjusting screw rod, and the rotary handle is circular.
Preferably, the front surface of the first telescopic pipe is provided with a scale groove, and the inner side of the scale groove is provided with scale marks.
Preferably, the first telescopic pipe is provided with two positions, and the clamping blocks are provided with four positions.
Preferably, the middle part of the outer surface of the adjusting pull rope is sleeved with a rubber sleeve, and the outer surface of the rubber sleeve is provided with anti-skid lines.
Preferably, the connecting block is also rectangular, and the connecting block is abutted to the support plate.
A use method of a coal passing density detection device comprises the following steps:
a. the adjusting pull rope is pulled upwards to enable the adjusting pull rope to drive the clamping block to withdraw from the inner side of the clamping groove, the first telescopic pipe can slide upwards to adjust the height of the support plate, the adjusting pull rope is loosened after adjustment, and the clamping block enters the inner side of the other clamping groove under the pushing of the elastic force of the spring;
b. the adjusting screw rod is driven to rotate by rotating the handle, the connecting block is driven to move by the adjusting screw rod through the threaded part, and the connecting block is matched with the spring through the guide groove, so that the connecting block can be conveniently moved horizontally, and the horizontal position of the line laser scanning head can be adjusted;
c. make line laser scanning head external computer, scan the coal of carrying on the conveyer belt through line laser scanning head, find volume V according to the integral formula, the integral formula is:
Figure BDA0002997516460000031
wherein V represents the volume, b, a respectively represent the end point and the starting point of the running of the conveyor belt, dx is the spacing distance between b and a in the running direction of the conveyor belt, S (x) is the cross-sectional area obtained by the numerical value of the distance obtained by scanning the outer contour of the belt material by the line laser scanning head, and the expression of S (x) is as follows,
Figure BDA0002997516460000032
Figure BDA0002997516460000033
x0the value is; f (x)n) The value is obtained by line laser ranging, n is the number of points of line laser X-axis precision equidistant division, XiDividing the projection length of the belt in the X-axis direction by the value of the ith sampling point equally divided by the X-axis precision of the line laser, XnThe value of the nth sampling point which is obtained by dividing the projection length of the belt in the X-axis direction by the X-axis precision of the line laser at equal intervals, namely Delta S (X)i) The area of the line laser scanning head between the ith-1 sampling point and the ith sampling point is obtained by calculation according to the projection length and the installation angle of the belt on the carrier rollers at two sides in the X-axis direction;
d. later stage is weighed the coal weight through the belt weigher, can solve the density of crossing the coal, cross coal density rho, as shown:
m＝V×ρ
wherein m represents the weight of coal;
e. in the process of conveying the conveying belt by the rotation of the carrier roller, the surface of the carrier roller is cleaned by the bristles, and the rubber block has good elasticity, so that the bristles are in contact with the carrier roller better.
Compared with the prior art, the invention has the beneficial effects that:
(1) through setting up wired laser scanning head, first flexible pipe, the flexible pipe of second, adjust stay cord, adjusting screw, fixture block, connecting block and connecting plate, be convenient for avoid measuring and calculating the inconvenience to crossing coal volume, the later stage needs measure its volume alone, and device simple structure can adjust the height and the horizontal position of line laser scanning head according to actual need, has increased the practicality of device.
(2) Through being provided with mounting panel, block rubber and brush hair, be convenient for avoid inconvenient to the adnexed coal cinder clearance in bearing roller surface, the coal cinder causes to take place to skid between bearing roller and the conveyor belt, and device simple structure is convenient for improve the result of use of device.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view at A of FIG. 1 according to the present invention;
FIG. 3 is a schematic diagram of a connecting plate structure according to the present invention;
FIG. 4 is a schematic cross-sectional view at B of FIG. 1 according to the present invention;
in the figure: 1. a first carrier roller frame; 2. a line laser scanning head; 3. connecting blocks; 4. a support plate; 5. adjusting the pull rope; 6. adjusting the screw rod; 7. rotating the handle; 8. a first telescopic tube; 9. scale marks; 10. a second telescopic tube; 11. a conveyor belt; 12. a carrier roller; 13. a second carrier roller frame; 14. a spring; 15. a clamping block; 16. a connecting plate; 17. a guide groove; 18. mounting a plate; 19. a rubber block; 20. brushing; 21. a rubber sleeve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a coal passing density detection device comprises a first roller frame 1, a second roller frame 13 is fixed on the first roller frame 1, a supporting roller 12 is rotatably arranged on the inner side of the second roller frame 13, a conveying belt 11 is arranged on the supporting roller 12, a second telescopic pipe 10 is fixed on the side surface of the first roller frame 1, a first telescopic pipe 8 is arranged at the upper end of the inner side of the second telescopic pipe 10 and is convenient for adjusting the height of a supporting plate 4, the supporting plate 4 is fixed on the first telescopic pipe 8, the front surface of the supporting plate 4 is rotatably connected with an adjusting screw 6 through a bearing seat and is convenient for adjusting the horizontal position of the connecting block 3, a connecting block 3 is sleeved on the outer side of the adjusting screw 6, the connecting block 3 is matched and connected with the adjusting screw 6 through a thread part, a connecting plate 16 is fixed on the lower surface of the connecting block 3, a guide groove 17 is arranged on the connecting plate, make connecting block 3 carry out horizontal migration better being convenient for, surface mounting has wired laser scanning head 2 under connecting plate 16, be convenient for scan the coal of carrying, mounting groove has been seted up to first flexible pipe 8 both sides wall, the mounting groove inboard is fixed with spring 14, be convenient for promote fixture block 15 and get into the inboard of draw-in groove, spring 14 one end is fixed with fixture block 15, fixture block 15 one side wall is provided with adjusts stay cord 5, be convenient for better pulling fixture block 15 to remove, it runs through first flexible pipe 8 upper surface to adjust stay cord 5, the draw-in groove has been seted up to the flexible pipe 10 inboard of second, fixture block 15 cooperates through the draw-in groove with the flexible pipe 10 of second and is connected, be convenient for restrict first flexible pipe 8 and the flexible.
Preferably, the front surface of the second roller frame 13 is fixed with a mounting plate 18 through screws, the upper end of the mounting plate 18 is fixed with a rubber block 19, bristles 20 are fixed on the rubber block 19, and the bristles 20 are in contact with the roller 12, so that the surface of the roller 12 can be cleaned conveniently.
Preferably, the mounting plate 18 is rectangular, which facilitates better cleaning effect, and the number of the mounting plates 18 is equal to that of the carrier rollers 12.
Preferably, a rotary handle 7 is fixed at one end of the adjusting screw rod 6, and the rotary handle 7 is circular, so that the adjusting screw rod 6 can rotate conveniently.
Preferably, the front surface of the first telescopic pipe 8 is provided with a scale groove, and the inner side of the scale groove is provided with a scale mark 9, so that the length of the first telescopic pipe 8 extending out of the second telescopic pipe 10 can be conveniently recorded.
Preferably, the first telescopic tube 8 is provided with two positions to better support the support plate 4, and the four clamping blocks 15 are provided.
Preferably, the middle of the outer surface of the adjusting pull rope 5 is sleeved with a rubber sleeve 21, and the outer surface of the rubber sleeve 21 is provided with anti-slip lines, so that the pull rope 5 can be conveniently and better pulled to move.
Preferably, connecting block 3 also is the rectangle, and connecting block 3 offsets with extension board 4, is convenient for when adjustment connecting block 3 removes, and connecting block 3 self takes place to rotate.
A use method of a coal passing density detection device comprises the following steps:
a. the adjusting pull rope 5 is pulled upwards, so that the adjusting pull rope 5 drives the clamping block 15 to withdraw from the inner side of the clamping groove, the first telescopic pipe 8 can slide upwards at the moment to adjust the height of the support plate 4, the adjusting pull rope 5 is loosened after adjustment, and the clamping block 15 enters the inner side of another clamping groove under the pushing of the elastic force of the spring 14;
b. the adjusting screw rod 6 is driven to rotate by rotating the handle 7, the adjusting screw rod 6 drives the connecting block 3 to move through the thread part, and the connecting plate 16 is matched with the spring 14 through the guide groove 17, so that the connecting block 3 can move horizontally, and the horizontal position of the line laser scanning head 2 can be adjusted;
c. make line laser scanning head 2 external computer, scan the coal of carrying on conveyor belt 11 through line laser scanning head 2, find volume V according to the integral formula, the integral formula is:
Figure BDA0002997516460000071
wherein V represents the volume, b, a respectively represents the end point and the starting point of the running of the conveyor belt, dx is the spacing distance between b and a in the running direction of the conveyor belt, S (x) is the section area obtained by the numerical value of the distance obtained by the line laser scanning head 2 scanning the outer contour of the belt material, and the expression of S (x) is as follows,
Figure BDA0002997516460000072
Figure BDA0002997516460000073
……，
Figure BDA0002997516460000074
Figure BDA0002997516460000081
x0a value of 0; f (x)n) The value is obtained by line laser ranging, n is the number of points of line laser X-axis precision equidistant division, XiDividing the projection length of the belt in the X-axis direction by the value of the ith sampling point equally divided by the X-axis precision of the line laser, XnThe value of the nth sampling point which is obtained by dividing the projection length of the belt in the X-axis direction by the X-axis precision of the line laser at equal intervals, namely Delta S (X)i) The area scanned by the line laser scanning head 2 between the ith-1 sampling point and the ith sampling point is obtained by calculation according to the projection length and the installation angle of the belt on the carrier rollers at two sides in the X-axis direction;
d. later stage is weighed the coal weight through the belt weigher, can solve the density of crossing the coal, cross coal density rho, as shown:
m＝V×ρ
wherein m represents the weight of coal;
e. in the process of conveying the conveying belt 11 by the rotation of the carrier roller 12, the surface of the carrier roller 12 is cleaned by the bristles 20, and the rubber block 19 has good elasticity, so that the bristles 20 are better contacted with the carrier roller 12.
In summary, the invention is convenient to avoid inconvenience in measuring and calculating the volume of the coal, needs to measure the volume of the coal independently in the later period, has a simple structure, can adjust the height and the horizontal position of the line laser scanning head according to actual needs, increases the practicability of the device, is convenient to avoid inconvenience in cleaning coal scraps attached to the surface of a carrier roller by arranging the mounting plate, the rubber block and the brush hair, prevents the carrier roller and the conveying belt from skidding due to the coal scraps, has a simple structure, and is convenient to improve the use effect of the device.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a cross coal density detection device, includes first bearing roller frame (1), be fixed with second bearing roller frame (13) on first bearing roller frame (1), second bearing roller frame (13) inboard is rotated and is provided with bearing roller (12), be provided with conveyor belt (11), its characterized in that on bearing roller (12): a second telescopic pipe (10) is fixed on the side surface of the first carrier roller frame (1), a first telescopic pipe (8) is arranged at the upper end of the inner side of the second telescopic pipe (10), a support plate (4) is fixed on the first telescopic pipe (8), the front surface of the support plate (4) is rotatably connected with an adjusting screw rod (6) through a bearing seat, a connecting block (3) is sleeved on the outer side of the adjusting screw rod (6), the connecting block (3) is in matched connection with the adjusting screw rod (6) through a screw thread part, a connecting plate (16) is fixed on the lower surface of the connecting block (3), a guide groove (17) is formed in the connecting plate (16), the support plate (4) is in matched connection with the connecting plate (16) through the guide groove (17), a wire laser scanning head (2) is fixed on the lower surface of the connecting plate (16), and mounting, the inner side of the mounting groove is fixedly provided with a spring (14), one end of the spring (14) is fixedly provided with a clamping block (15), one side wall of the clamping block (15) is provided with an adjusting pull rope (5), the adjusting pull rope (5) penetrates through the upper surface of the first telescopic pipe (8), the inner side of the second telescopic pipe (10) is provided with a clamping groove, and the clamping block (15) is connected with the second telescopic pipe (10) in a matched mode through the clamping groove.
2. The coal passing density detection device according to claim 1, wherein: the front surface of the second carrier roller frame (13) is fixed with a mounting plate (18) through screws, the upper end of the mounting plate (18) is fixed with a rubber block (19), bristles (20) are fixed on the rubber block (19), and the bristles (20) are in contact with the carrier rollers (12).
3. The coal passing density detection device according to claim 2, wherein: the mounting plate (18) is rectangular, and the number of the mounting plate (18) is equal to that of the carrier rollers (12).
4. The coal passing density detection device according to claim 1, wherein: and a rotary handle (7) is fixed at one end of the adjusting screw rod (6), and the rotary handle (7) is circular.
5. The coal passing density detection device according to claim 1, wherein: the front surface of the first telescopic pipe (8) is provided with a scale groove, and the inner side of the scale groove is provided with a scale mark (9).
6. The coal passing density detection device according to claim 1, wherein: the first telescopic pipe (8) is provided with two positions, and the four clamping blocks (15) are arranged.
7. The coal passing density detection device according to claim 1, wherein: the middle of the outer surface of the adjusting pull rope (5) is sleeved with a rubber sleeve (21), and anti-slip lines are arranged on the outer surface of the rubber sleeve (21).
8. The coal passing density detection device according to claim 1, wherein: the connecting block (3) is also rectangular, and the connecting block (3) is abutted to the support plate (4).
9. A use method of a coal passing density detection device is characterized in that: the method comprises the following steps:
a. the adjusting pull rope (5) is pulled upwards, so that the adjusting pull rope (5) drives the clamping block (15) to withdraw from the inner side of the clamping groove, the first telescopic pipe (8) can slide upwards at the moment to adjust the height of the support plate (4), the adjusting pull rope (5) is loosened after adjustment, and the clamping block (15) enters the inner side of the other clamping groove under the pushing of the elastic force of the spring (14);
b. the adjusting screw rod (6) is driven to rotate by the rotary handle (7), the adjusting screw rod (6) drives the connecting block (3) to move through the thread part, and the connecting plate (16) is matched with the spring (14) through the guide groove (17), so that the connecting block (3) can move horizontally, and the horizontal position of the line laser scanning head (2) is adjusted;
c. make line laser scanning head (2) external computer, scan the coal of carrying on conveyor belt (11) through line laser scanning head (2), find volume V according to the integral formula, the integral formula is:
Figure FDA0002997516450000031
wherein V represents the volume, b and a respectively represent the end point and the starting point of the running of the conveyor belt, dx is the spacing distance between b and a in the running direction of the conveyor belt, S (x) is the cross-sectional area obtained by the numerical value of the distance obtained by scanning the outer contour of the belt material by the line laser scanning head (2), and the expression of S (x) is as follows,
Figure FDA0002997516450000032
Figure FDA0002997516450000033
x0a value of 0; f (x)n) The value is obtained by line laser ranging, n is the number of points of line laser X-axis precision equidistant division, XiFor the belt to be in the X-axis directionDividing the projection length by the value of the ith sampling point equally divided by the X-axis precision of the line laser, XnThe value of the nth sampling point which is obtained by dividing the projection length of the belt in the X-axis direction by the X-axis precision of the line laser at equal intervals, namely Delta S (X)i) The area scanned by the line laser scanning head (2) between the ith-1 sampling point and the ith sampling point is obtained by calculation according to the projection length and the installation angle of the belt on the carrier rollers at two sides in the X-axis direction;
d. later stage is weighed the coal weight through the belt weigher, can solve the density of crossing the coal, cross coal density rho, as shown:
m＝V×ρ
wherein m represents the weight of coal;
e. in the process of conveying the conveying belt (11) by rotating the carrier roller (12), the surface of the carrier roller (12) is cleaned through the bristles (20), and the rubber block (19) is good in elasticity, so that the bristles (20) can be better contacted with the carrier roller (12).
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US4176964A (en) * 1976-09-08 1979-12-04 Agfa-Gevaert, A.G. Determination of extreme density values of a transported strip of photographic originals
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US6137294A (en) * 1999-01-21 2000-10-24 Usx Corporation Prediction of bulk density of particulates with a correlation based on moisture content
EP2246673A1 (en) * 2009-04-28 2010-11-03 Sick Ag Method for determining the volume of loads and device
CN210775113U (en) * 2019-09-25 2020-06-16 深圳职业技术学院 Solid density measuring instrument
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Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1064943A (en) * 1963-02-08 1967-04-12 Coal Ind Method and apparatus for measuring the bulk density of material
GB1265371A (en) * 1968-04-10 1972-03-01
US4176964A (en) * 1976-09-08 1979-12-04 Agfa-Gevaert, A.G. Determination of extreme density values of a transported strip of photographic originals
DE3735749A1 (en) * 1986-11-12 1988-05-26 Orgreb Inst Kraftwerke Method and arrangement for controlling a plurality of coal feed devices conveying to a central transport installation
DE4240094A1 (en) * 1992-11-28 1994-06-01 Abb Patent Gmbh CCD camera system for control of flow on belt conveyor - evaluates shape and vol. of moving mass by processing of image of bright band projected onto surface
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