CA2085338A1 - Weighing apparatus - Google Patents
Weighing apparatusInfo
- Publication number
- CA2085338A1 CA2085338A1 CA 2085338 CA2085338A CA2085338A1 CA 2085338 A1 CA2085338 A1 CA 2085338A1 CA 2085338 CA2085338 CA 2085338 CA 2085338 A CA2085338 A CA 2085338A CA 2085338 A1 CA2085338 A1 CA 2085338A1
- Authority
- CA
- Canada
- Prior art keywords
- transducer
- orientated
- axis
- web
- lateral
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G21/00—Details of weighing apparatus
- G01G21/22—Weigh pans or other weighing receptacles; Weighing platforms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/08—Apparatus for or methods of weighing material of special form or property for weighing livestock
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G21/00—Details of weighing apparatus
- G01G21/23—Support or suspension of weighing platforms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/1402—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Force In General (AREA)
Abstract
Weighing apparatus for the electronic weighing of livestock and other applications consists of an elongated weight-receiving structure (20) at each end of which an orientated transducer (23, 24, 60) is mounted with its axis of orientation intersecting the longitudinal axis of the structure. The orientated transducer may comprise a bending beam weighbar (23) or a pair of load cells (60).
Description
WO91/1~60 PCT/AU91/00252 -1- 29~5338 WEI~HING APPA-R-A~E~
Economical weighing equipment suitable for use in the electronic weighing of livestock and industrial loads and in many other applications is known, in the form of individual weighb4ams consisting of a load-receiving member the load forces on which are transferred to a tran~ducer structure, which may take the form of an axially extending bending beam weighbar carrying a strain gauge, or alternatively may comprise a pair of load cells, one load cell being mounted at each end of the load-receiving member. In the case where the tran~ducer used is a bending beam device, such weighbea~s may be of the kind described in Aus~ralian patent No. 590520.
In many load measurement applications, a pair of such weighbeAms are used beneath a lo~d-carrying structure, for example a crate or a cattle crush.
In applications involving dynamic or live loads, and particularly in the weighing of live animals, for example ca~tle, weighbea~s of the type described above have some disadvantages. Where a pair of weighbeams are placed under a cattle crush or in a section of a race, these must be placed transverse to the major direction of movemen~ of the animals on the structure.
Such movement tends to roll the weighbeams about their longitudinal axes, and particularly in the case of beams employing loadcells, this can produce undesirable and damaging torque and side loading on transducers, leading ~o unacceptable weighin~ results, and equipment damage. Where the equipment uses bending beam transducers of the kind described in the above-mentioned patent thi.s problem is less acute, but still the need exists for a structure which avoids this problem ye~ still provides a simple, robust and .,j33~i economical device capable of the desired degree of accuracy.
In this ~pecification the expression ~Ibending beam transducerl~ means a load measuremen~ device in which load and reaction forces are applied to a beam in equilibrium, these iorces being app]Lied to respective force tran~mi~sion means spaced from one ano~her in the longitudinal direction of the beam, and in which 10 i8 measured at a selected region of the beam the strain therein which arises from the bending of the beam by those forces and which is proport,ional to the distances be~ween the said region and the force ~ransmission means. The beam employed in such a transducer will throughout this specification be referred to as a ~bending beam weighbar."
For ease of reference, throughout this specification both a bending beam transducer and a pair of load cells attached to a common load receiving structure the outputs of which are used ~ogether in deriving the value of the load on the ~tructure with which ~hey are engaged, will be referred to as an "orientat-ed transducer~, and references to the orientation of such a transducer will be to the orientation of the length of the bending beam weighbar or of a line joining the load cell pair.
Also included within the expression ~orientated transducer~ herein are transducers which comprise a strain measuring region lying between a load application region and a support region, ~hese regions lying substantially on a common axis, and referellces to the orientation of such a transducer are to the orien~ation of that common axis.
An example of this last-mentioned type of orientated 20~a338 transducer is the well known shearbeam loadcell.
The invention broadly resides in weighing apparatus having a longitudinal axis, said apparatus being supported on a pair of orientated transducers as defined herein located substantially adjacent each end of 6aid member, each said transducer being orientated on an axis which intersects said longi~udinal axis.
The invention also resides in weighing apparatus comprising a weight-receiYing structure for use in the weighing of dynamic loads subjected to impulsive loading predominantly in substantial alignment with a first axis vf the structure, said structure being supported by four orientated transducers as defined herein, one such transducer being located in each of the four quadrants defined by said axis and an orthogonal axis passing through the mid-point of the length of the structure along said first axis, each such transducer being supported at a region on each ~ide of an axis normal to said first axis.
The invention will now be described, by way of example only, with reference to several embodiments illustrated in the drawings, in which:
Fig. 1 is a plan view of a weighing unit according to a first embodiment of the invention;
Fig. 2 is a side elevation of the unit illustrated in Fig. l;
Fig. 3 is a sectional elevation taken on the line 3-3 in Fig. 1;
Fig. 4 is a bottom plan view of the weighing unit illustrated in Fig. l;
3s Fig. 5 is a plan view of a second embodiment of the invention;
Fig. 6 is a fragmentary side elevation of the unit WO91tl9960 ~3~ 4-illustrated in Fig. 5;
Fig. 7 is a plan view of a further embodiment of the invention;
Fig. 8 is a cross-6ection taken on the line 8-8 of Fig. 7;
Fig. 9 is a schematic plan vie~ showing one manner of use of the weighing units embodying the inventio~;
Fig. 10 is a plan view of a further embodiment of the invention;
Fig. 11 is a plan view of a further embodiment of the i~vention;
Fig. 12 is a fragmentary sectional elevation taken on the line lO-lO of Fig. 11;
Fig. 13 is a fragmentary sectional elevation taken on the line 11-ll of Fig. 12; and Fig. 14 is a plan ~iew of a further embodiment of the invention.
In the embodiment of the invention shown in Figs. 1--4 a channel section s~eel beam 20 carries at each end an orthogonally orientated transducer housing 21 formed from similar channel section.
Mounted within each of the housings 21 is a transducer comprising a bending beam bar 23 fitted with a strain gauge unit 2~. The bar 23 i5, as in the prior art referred to, fixed to the housing 21 and a base member 25 by means of elastomer load ~ransferring members 26. The material and manner of construction of the members 26 are preferably in accordance with the teachi~gs of applicant~s Australian patent application No. 33534/8g.
The base member 25 in this embodiment comprises a steel plate to which is attached at each end by welding, a lug 27 which extends beyond the plate ~o WO9~/19960 PCT/AU91/00252 20~338 enable the assembly to be fixed, if required, to a floor or other surface.
Studs 28 fixed to the elastomer el~ments 26 secure these to the housing 21 and the base member 25. In order that the nuts on the external ends of the studs 2~ should not stand proud of the surface of the housing 21 and the base member 25, pads 29 are provided between the web of th~ housing 21 and the upper elastomer elements 26 so that the upper nuts rest within apertures 30 in the web of the housing, while the lower nuts rest in apertures 31 si~ilarly provided in the lugs 27.
The strai~ gauge units 24 of each bar 23 are interconnected by wiring (not shown) incorporating a balancing circuit to normalize the orientated transducer outputs for a given load.
The use of channel section members in the construction of the unit so far described provides adequate structural strength and rigidity while avoiding the creation of enclosed spaces which encourage the retention of foreign matter, with consequent corrosion. The illustrated configuration also provides ready accessability for service. For example, access to the transducers is gained simply by the removal of the two nuts securing the members 26 to the base member 25, and the reJnoval of the nuts from the upper studs as well enables complete disassembly.
Figs. 5 and 6 illustrate an alternative approach to the construction o~ a weighing unit having a basic geometry similar to that of the units of Figs. l to 3; 4. In this second embodiment a preferably channel-shaped central body portion 40 extends between transverse end pieces 41 formed of steel C~ J
angle and thereby having a horizon~al f lange 42 and a vertical web 43.
A bending beam weighbar 24, in a mannex simila.r to that of the first embodLment, supports the flange 42 by means of elastomer load transfer elements 26.
The weighbars 24 are similarly supported on angle section members 44, comprising a flange 45 and a vertical web 46, which serve with the sections 41 mechanically to protect the transducer assembly. As in the firs~ embodiment, the transducer assembly is secured by studs 28.
~ounting lugs 48 are attached to the flanges 42, forming pads for the elements 26 and allowing the upper stud nuts to be concealed in apertures 47, while mounting lugs 48a are provided on the flanges 45, pads 49 enabling the lower stud nuts to rest in apertures 50 in the flanges 45 and lugs 48a.
In the device illustrated in Figs. 7 and 8 the lateral members 21 are oppositely directed and each houses a shearbsam loadcell 60 which in accordance with the present invention is orientated as illustrated. The members 21 are supported on the loadcell 60 by means of a elastomeric load transfer element 61 and are fixed to the base member 25 by conventional means such as a pair of bolts (not shown).
Fig. 9 shows schema~ically a typical application of the invention, where a cattle crush 51 is supported on a pair of devices of the kind described in relation to 3~ Figs. 1-4. Such an arrangement will be seen to have an inherent s~ability along the main axis of animal movement and dynamic loading which is superior to that .
.,- ..
. ' . .
WO91~1g~60 _7_ 2 ~ ~ 3 38 obtained by the prior art devices described. By the use of four short bending beam ~ransducers, moreover, a greater load-carrying capacity and shear streng~h can be achieved while still retaining the use of inexpensive elastomeric load transfer members, without 10~8 of linearity.
Nany variations in the construction of the device may be made without departing from the principles of the present invention. For example, the load carrying member lO and the housing ll may be of channel or other section, and the member lO may be telescopic so as to be adjustable to the dimensions of different loads, or may be constructed in sections for ease of packing and transport.
Fig. lO illustrates such an arrangement, in which the transducer housings 21 are detachably mounted on the ends of the beam 20, for example by means of stub channels 52 bolted to the ends of the beam 20.
As described earlier, the orientated transducers employed in embodiments of the invention need not be of the bending beam type. They may for example comprise pairs of load cells, for example shear beam load cells, the cells of each pair being located at each end of the respective housing 21. Preferably, the shear beams will be orientated with their longitudinal axis on or parallel to the axis of the housing 2l.
Where bending beam transducers are employed, the elastomer elements 26 may be substituted by other means for load transfer and support. For ~xample, pins with elas~omeric bushes may be employed, as described in applicant~s Australian patent No.
590520. In a particularly simple arrangement, wO9~/1gg60 ~ 3~
minLmizing cost although being subject to wear, having a shorter life, and providing less accurate we.ighing, fixed pins may be employed without elastomeric bushes.
Pigs. 11-13 illustrate such an arrangement, in which the load is applied to the bar 23 by pins 53 engaged with the flanges of the housings 21, and the bar is supported by pins 54 engaged with flanges 55 provided on the base member 2S.
Fig. 14 illustrates another embodiment of the present invention, where the approach taken in Fig. 10 is extended. In this case, a cattle crush 56 (or other device) is provided with stubs 57 of steel tube, which may be fixed to the crush by welding. Housings 21 are provided with sockets 58 of steel tube dimensioned for a close sliding fit with the stubs 57, and the stubs and the sockets are provided with holes for the reception of locking pins after the housings have been attached to the crush. In this way, the crush 56 replaces the load-carrying body used in the embodiments described above.
Economical weighing equipment suitable for use in the electronic weighing of livestock and industrial loads and in many other applications is known, in the form of individual weighb4ams consisting of a load-receiving member the load forces on which are transferred to a tran~ducer structure, which may take the form of an axially extending bending beam weighbar carrying a strain gauge, or alternatively may comprise a pair of load cells, one load cell being mounted at each end of the load-receiving member. In the case where the tran~ducer used is a bending beam device, such weighbea~s may be of the kind described in Aus~ralian patent No. 590520.
In many load measurement applications, a pair of such weighbeAms are used beneath a lo~d-carrying structure, for example a crate or a cattle crush.
In applications involving dynamic or live loads, and particularly in the weighing of live animals, for example ca~tle, weighbea~s of the type described above have some disadvantages. Where a pair of weighbeams are placed under a cattle crush or in a section of a race, these must be placed transverse to the major direction of movemen~ of the animals on the structure.
Such movement tends to roll the weighbeams about their longitudinal axes, and particularly in the case of beams employing loadcells, this can produce undesirable and damaging torque and side loading on transducers, leading ~o unacceptable weighin~ results, and equipment damage. Where the equipment uses bending beam transducers of the kind described in the above-mentioned patent thi.s problem is less acute, but still the need exists for a structure which avoids this problem ye~ still provides a simple, robust and .,j33~i economical device capable of the desired degree of accuracy.
In this ~pecification the expression ~Ibending beam transducerl~ means a load measuremen~ device in which load and reaction forces are applied to a beam in equilibrium, these iorces being app]Lied to respective force tran~mi~sion means spaced from one ano~her in the longitudinal direction of the beam, and in which 10 i8 measured at a selected region of the beam the strain therein which arises from the bending of the beam by those forces and which is proport,ional to the distances be~ween the said region and the force ~ransmission means. The beam employed in such a transducer will throughout this specification be referred to as a ~bending beam weighbar."
For ease of reference, throughout this specification both a bending beam transducer and a pair of load cells attached to a common load receiving structure the outputs of which are used ~ogether in deriving the value of the load on the ~tructure with which ~hey are engaged, will be referred to as an "orientat-ed transducer~, and references to the orientation of such a transducer will be to the orientation of the length of the bending beam weighbar or of a line joining the load cell pair.
Also included within the expression ~orientated transducer~ herein are transducers which comprise a strain measuring region lying between a load application region and a support region, ~hese regions lying substantially on a common axis, and referellces to the orientation of such a transducer are to the orien~ation of that common axis.
An example of this last-mentioned type of orientated 20~a338 transducer is the well known shearbeam loadcell.
The invention broadly resides in weighing apparatus having a longitudinal axis, said apparatus being supported on a pair of orientated transducers as defined herein located substantially adjacent each end of 6aid member, each said transducer being orientated on an axis which intersects said longi~udinal axis.
The invention also resides in weighing apparatus comprising a weight-receiYing structure for use in the weighing of dynamic loads subjected to impulsive loading predominantly in substantial alignment with a first axis vf the structure, said structure being supported by four orientated transducers as defined herein, one such transducer being located in each of the four quadrants defined by said axis and an orthogonal axis passing through the mid-point of the length of the structure along said first axis, each such transducer being supported at a region on each ~ide of an axis normal to said first axis.
The invention will now be described, by way of example only, with reference to several embodiments illustrated in the drawings, in which:
Fig. 1 is a plan view of a weighing unit according to a first embodiment of the invention;
Fig. 2 is a side elevation of the unit illustrated in Fig. l;
Fig. 3 is a sectional elevation taken on the line 3-3 in Fig. 1;
Fig. 4 is a bottom plan view of the weighing unit illustrated in Fig. l;
3s Fig. 5 is a plan view of a second embodiment of the invention;
Fig. 6 is a fragmentary side elevation of the unit WO91tl9960 ~3~ 4-illustrated in Fig. 5;
Fig. 7 is a plan view of a further embodiment of the invention;
Fig. 8 is a cross-6ection taken on the line 8-8 of Fig. 7;
Fig. 9 is a schematic plan vie~ showing one manner of use of the weighing units embodying the inventio~;
Fig. 10 is a plan view of a further embodiment of the invention;
Fig. 11 is a plan view of a further embodiment of the i~vention;
Fig. 12 is a fragmentary sectional elevation taken on the line lO-lO of Fig. 11;
Fig. 13 is a fragmentary sectional elevation taken on the line 11-ll of Fig. 12; and Fig. 14 is a plan ~iew of a further embodiment of the invention.
In the embodiment of the invention shown in Figs. 1--4 a channel section s~eel beam 20 carries at each end an orthogonally orientated transducer housing 21 formed from similar channel section.
Mounted within each of the housings 21 is a transducer comprising a bending beam bar 23 fitted with a strain gauge unit 2~. The bar 23 i5, as in the prior art referred to, fixed to the housing 21 and a base member 25 by means of elastomer load ~ransferring members 26. The material and manner of construction of the members 26 are preferably in accordance with the teachi~gs of applicant~s Australian patent application No. 33534/8g.
The base member 25 in this embodiment comprises a steel plate to which is attached at each end by welding, a lug 27 which extends beyond the plate ~o WO9~/19960 PCT/AU91/00252 20~338 enable the assembly to be fixed, if required, to a floor or other surface.
Studs 28 fixed to the elastomer el~ments 26 secure these to the housing 21 and the base member 25. In order that the nuts on the external ends of the studs 2~ should not stand proud of the surface of the housing 21 and the base member 25, pads 29 are provided between the web of th~ housing 21 and the upper elastomer elements 26 so that the upper nuts rest within apertures 30 in the web of the housing, while the lower nuts rest in apertures 31 si~ilarly provided in the lugs 27.
The strai~ gauge units 24 of each bar 23 are interconnected by wiring (not shown) incorporating a balancing circuit to normalize the orientated transducer outputs for a given load.
The use of channel section members in the construction of the unit so far described provides adequate structural strength and rigidity while avoiding the creation of enclosed spaces which encourage the retention of foreign matter, with consequent corrosion. The illustrated configuration also provides ready accessability for service. For example, access to the transducers is gained simply by the removal of the two nuts securing the members 26 to the base member 25, and the reJnoval of the nuts from the upper studs as well enables complete disassembly.
Figs. 5 and 6 illustrate an alternative approach to the construction o~ a weighing unit having a basic geometry similar to that of the units of Figs. l to 3; 4. In this second embodiment a preferably channel-shaped central body portion 40 extends between transverse end pieces 41 formed of steel C~ J
angle and thereby having a horizon~al f lange 42 and a vertical web 43.
A bending beam weighbar 24, in a mannex simila.r to that of the first embodLment, supports the flange 42 by means of elastomer load transfer elements 26.
The weighbars 24 are similarly supported on angle section members 44, comprising a flange 45 and a vertical web 46, which serve with the sections 41 mechanically to protect the transducer assembly. As in the firs~ embodiment, the transducer assembly is secured by studs 28.
~ounting lugs 48 are attached to the flanges 42, forming pads for the elements 26 and allowing the upper stud nuts to be concealed in apertures 47, while mounting lugs 48a are provided on the flanges 45, pads 49 enabling the lower stud nuts to rest in apertures 50 in the flanges 45 and lugs 48a.
In the device illustrated in Figs. 7 and 8 the lateral members 21 are oppositely directed and each houses a shearbsam loadcell 60 which in accordance with the present invention is orientated as illustrated. The members 21 are supported on the loadcell 60 by means of a elastomeric load transfer element 61 and are fixed to the base member 25 by conventional means such as a pair of bolts (not shown).
Fig. 9 shows schema~ically a typical application of the invention, where a cattle crush 51 is supported on a pair of devices of the kind described in relation to 3~ Figs. 1-4. Such an arrangement will be seen to have an inherent s~ability along the main axis of animal movement and dynamic loading which is superior to that .
.,- ..
. ' . .
WO91~1g~60 _7_ 2 ~ ~ 3 38 obtained by the prior art devices described. By the use of four short bending beam ~ransducers, moreover, a greater load-carrying capacity and shear streng~h can be achieved while still retaining the use of inexpensive elastomeric load transfer members, without 10~8 of linearity.
Nany variations in the construction of the device may be made without departing from the principles of the present invention. For example, the load carrying member lO and the housing ll may be of channel or other section, and the member lO may be telescopic so as to be adjustable to the dimensions of different loads, or may be constructed in sections for ease of packing and transport.
Fig. lO illustrates such an arrangement, in which the transducer housings 21 are detachably mounted on the ends of the beam 20, for example by means of stub channels 52 bolted to the ends of the beam 20.
As described earlier, the orientated transducers employed in embodiments of the invention need not be of the bending beam type. They may for example comprise pairs of load cells, for example shear beam load cells, the cells of each pair being located at each end of the respective housing 21. Preferably, the shear beams will be orientated with their longitudinal axis on or parallel to the axis of the housing 2l.
Where bending beam transducers are employed, the elastomer elements 26 may be substituted by other means for load transfer and support. For ~xample, pins with elas~omeric bushes may be employed, as described in applicant~s Australian patent No.
590520. In a particularly simple arrangement, wO9~/1gg60 ~ 3~
minLmizing cost although being subject to wear, having a shorter life, and providing less accurate we.ighing, fixed pins may be employed without elastomeric bushes.
Pigs. 11-13 illustrate such an arrangement, in which the load is applied to the bar 23 by pins 53 engaged with the flanges of the housings 21, and the bar is supported by pins 54 engaged with flanges 55 provided on the base member 2S.
Fig. 14 illustrates another embodiment of the present invention, where the approach taken in Fig. 10 is extended. In this case, a cattle crush 56 (or other device) is provided with stubs 57 of steel tube, which may be fixed to the crush by welding. Housings 21 are provided with sockets 58 of steel tube dimensioned for a close sliding fit with the stubs 57, and the stubs and the sockets are provided with holes for the reception of locking pins after the housings have been attached to the crush. In this way, the crush 56 replaces the load-carrying body used in the embodiments described above.
Claims (23)
1. Weighing apparatus having a longitudinal axis, an elongated member lying on said axis, said apparatus being supported on a pair of orientated transducers as herein defined, one of said transducers being located substantially adjacent each end of said member, each said transducer being orientated on an axis which intersects said longitudinal axis.
2. Apparatus according to claim 1 wherein each said transducer is orientated substantially orthogonally relative to said longitudinal axis.
3. Apparatus according to claim 1 or claim 2 further comprising a pair of lateral members one adjacent each end of the elongated member, said lateral members being supported by respective ones of said transducers.
4. Apparatus according to claim 3 in which said lateral members each comprise channel members comprising a web and side flanges extending downwardly from the web.
5. Apparatus according claim 4 wherein each orientated transducer comprises a bending beam weighbar as defined herein attached to a respective lateral member by its load force transmission means.
6. Apparatus according to claim 5 wherein the load force transmission means of each weighbar are elastomeric elements, said elements being engaged with the web of the respective lateral member.
7. Apparatus according to any one of claims 2 to 5 further comprising a base member extending beneath each lateral member, each said transducer being supported by a respective base member.
8. Apparatus according to claim 3 wherein each said transducer comprises a shearbeam loadcell.
9. Apparatus according to claim 8 in which said base member extends at least partly beneath the structure of said apparatus thereby to limit the weight-responsive downward movement of said lateral member.
10. Apparatus according to claim 8 and 4 wherein said base member extends at least partly beneath one of said flanges.
11. Apparatus according to claim 5 wherein the load force transmission elements of each weighbar are pins, said elements being engaged with the respective flanges of the respective lateral member.
12. Apparatus according to claim 3 in which said lateral members are of angle section, each comprising an upper substantially horizontal web and a single side flange extending downwardly from one edge of the web.
13. Apparatus according to claim 12 further comprising a base member extending beneath each lateral member, said base members being of angle section and comprising a base web and a flange extending upwardly from the side of the base web remote from the side flange of the overlying lateral member.
14. Apparatus according to claim 12 in which each orientated transducer is engaged with the web of a respective lateral member.
15. Apparatus according to claim 14 wherein each orientated transducer comprises a bending beam weighbar as defined herein attached to a respective web by its load force transmission means.
16. Apparatus according to claim 15 wherein each transducer is attached to a base web by its reaction force transmission means.
17. Apparatus according to claim 16 further comprising means engaging with one of said flanges to limit travel of said lateral member towards said base member.
18. Apparatus according to any one of claims 3 to 17 wherein said lateral members are detachably secured to said elongated member.
19. Weighing apparatus comprising a pair of devices according to any preceding claim and a load receiving structure, said devices supporting said load receiving structure by extending beneath it, the longitudinal axes of said pair being similarly orientated relative to said structure.
20. Weighing apparatus according to claim 19 wherein said load receiving structure received dynamic loads having their varying components predominantly in a given direction, said pair of devices being orientated with their longitudidnal axes substantially normal to said direction.
21. Weighing apparatus comprising a weight receiving structure for use in the weighing of dynamic loads subjected to impulsive loading predominantly in sub-stantial alignment with a first axis of the structure, said structure being supported by four orientated transducers as defined herein, one such transducer being located in each of the four quadrants defined by said axis and an orthogonal axis passing through the mid-point of the length of the structure along said first axis, each such transducer being supported at a region on each side of an axis normal to said first axis.
22. Apparatus according to claim 18 wherein each transducer is carried by a housing detachably securable to said structure.
23. Apparatus substantially as described herein with reference to Figs. 1-4, 5-6, 7-8, 9, 10, 11-13 or 14 of the accompanying drawings.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPK064290 | 1990-06-14 | ||
| AUPJ0642 | 1990-06-14 | ||
| AUPJ1663 | 1990-08-10 | ||
| AUPK166390 | 1990-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2085338A1 true CA2085338A1 (en) | 1991-12-15 |
Family
ID=25643887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2085338 Abandoned CA2085338A1 (en) | 1990-06-14 | 1991-06-13 | Weighing apparatus |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0533777A1 (en) |
| CN (1) | CN1058469A (en) |
| BR (1) | BR9106560A (en) |
| CA (1) | CA2085338A1 (en) |
| WO (1) | WO1991019960A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1847771B1 (en) * | 2006-04-18 | 2015-02-18 | Anglepoise Holdings Limited | Balance system |
| DE102010022440A1 (en) * | 2010-05-28 | 2011-12-01 | Seca Ag | Device for weighing |
| CN104526883B (en) * | 2014-11-20 | 2017-02-22 | 徐州徐工施维英机械有限公司 | Additive metering device, concrete mixing plant, and additive metering method |
| CN105318944B (en) * | 2015-11-03 | 2018-06-29 | 浙江大学 | The chicken scene weighing system and method for rod-shaped platform |
| CN105640558B (en) * | 2015-12-31 | 2018-04-17 | 银川奥特信息技术股份公司 | Animal hoof disease checks system and method |
| CN107063409A (en) * | 2017-03-15 | 2017-08-18 | 厚福医疗装备有限公司 | Huge legendary turtle formula levitation axis weighing device |
| CN110419946B (en) * | 2019-07-30 | 2021-09-10 | 厦门大白科技有限公司 | Kettle capable of displaying water volume |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981001196A1 (en) * | 1979-10-23 | 1981-04-30 | J Muddle | Improved livestock weighing apparatus |
| EP0041127A1 (en) * | 1980-05-29 | 1981-12-09 | Eaton Corporation | Electromechanical scale |
| US4506746A (en) * | 1982-09-27 | 1985-03-26 | Hottinger Baldwin Measurements, Inc. | Gaged plate transducer weighing apparatus |
| EP0116170A3 (en) * | 1983-01-17 | 1985-01-09 | Hottinger Baldwin Messtechnik Gmbh | Weighing apparatus with rod-shaped transducer beams |
| GB8411379D0 (en) * | 1984-05-03 | 1984-06-06 | Egs Scales Uk Ltd | Weighbridge |
| DE3833291A1 (en) * | 1988-09-30 | 1990-04-05 | Pfister Gmbh | PLATFORM SCALE |
-
1991
- 1991-06-13 WO PCT/AU1991/000252 patent/WO1991019960A1/en not_active Application Discontinuation
- 1991-06-13 BR BR9106560A patent/BR9106560A/en not_active Application Discontinuation
- 1991-06-13 CA CA 2085338 patent/CA2085338A1/en not_active Abandoned
- 1991-06-13 EP EP19910911222 patent/EP0533777A1/en not_active Withdrawn
- 1991-06-14 CN CN 91104643 patent/CN1058469A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN1058469A (en) | 1992-02-05 |
| WO1991019960A1 (en) | 1991-12-26 |
| BR9106560A (en) | 1994-11-08 |
| EP0533777A1 (en) | 1993-03-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |