CN204373755U - Streams electronic scales - Google Patents
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- CN204373755U CN204373755U CN201520006129.3U CN201520006129U CN204373755U CN 204373755 U CN204373755 U CN 204373755U CN 201520006129 U CN201520006129 U CN 201520006129U CN 204373755 U CN204373755 U CN 204373755U
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Abstract
A kind of streams electronic scales, it comprises bracing frame and is fixedly installed on the LOAD CELLS on bracing frame, LOAD CELLS is fixedly installed rigidity to weigh chute, it is characterized in that rigidity weighs track length direction horizontal by an angle A, 0 ° of < A < 90 °; Be fixedly installed on the rigidity feeding chute on bracing frame or pay-off or independent rack, this feeding chute is parallel closely relative with chute of weighing, but does not contact, and position is slightly high; LOAD CELLS bearing end and rigidity weigh chute be rigidly connected and LOAD CELLS design to carry Impact direction and rigidity track length direction of weighing vertical, be also provided with the Weighing control instrument be electrically connected with LOAD CELLS.
Description
Technical field
The utility model relates to a kind of streams electronic scales, is applicable to the weight detecting of moving material stream on production line.Streams can be solid, also can be liquid.
Background technology
All electronic weighing appliances (containing: electronic scales) are all experience the weight of weighed object by sensor.Electronic weighing appliance adopts force snesor or the gravity of LOAD CELLS metering object in locality mostly.As everyone knows, the gravity of object is perpendicular to object location surface level.All the time, all by strict designated mounting mode and stress point and direction when force snesor or LOAD CELLS use, in order to avoid affect sensor accuracy.For reducing the component deviation of sensor, current nearly all sensor production factory, weighing-appliance factory, textbook, industry standard of weighing and specification, material for training, equipment operating debugging specification data all require that LOAD CELLS must level be installed, in order to avoid vertical gravity weighs important deviation on direction in the non-design of sensor.Error caused by on-the-spot non-horizontal mounting must reduce or eliminate by demarcating correction.Weigh and packaging industry or Weighing Apparatus Industry technician all view sensor level be installed as be accustomed to, customary, right and proper.
Dynamic electron is weighed and is referred to continuous weighting in weighed object operational process.The motion carrier being weighed object of existing dynamic electronic scale has belt, roll shaft, dissepiment, hopper etc., in the document that can consult and data, all Weighing unit and sensor levels are installed in the Design of Mechanical Structure of aforementioned all dynamic electronic scales, in order to avoid gravity to weigh on direction important deviation in the non-design of sensor or is not subject to whole gravity designing on Impact direction.Owing to containing the disturbance that motion carrier and deadweight and running amount of unbalance thereof produce in LOAD CELLS output, all there is the problems such as dynamic weighing precision is not high, manufacturing cost is high, maintenance cost is high, degree of protection is low in all dynamic electronic scales.
At present, adopt the dynamic electronic scale for moving material stream of LOAD CELLS mostly to adopt Belt Conveying mode, be also belt conveyer scale.Part belt conveyer scale does not have clear and definite material loading part, weighing sections is divided point, and sensor is directly installed on below a part of belt, so by belt tension, speed, conveying roller running jumping effect, weighing precision is very poor, degree of protection is low, maintenance cost is very high.Also have part belt conveyer scale, Weighing part is broken independent from production line belt, but have the conveying device in weighing unit still to use belt, weighing precision still affects very large by rotatable parts.
If adopt slideway to replace belt conveyor, sensor levels to arrange experience the vertical stress component of material suffered by slideway to slideway pressure by transmission rod again, can solve rotatable parts interfering object, still there are the following problems affects the problem of weighing precision and usable range: 1, sensor has the friction force of material instability in exporting; 2, weight of material exports at sensor is that decay is too many; 3, be not suitable for much needing high spud angle use occasion; 4, material signal is low to slideway deadweight accounting.Material can export to sensor and bring very large interference when feed bin or parallel belts fall into the slideway of inclination, exports bring very big error to weighing instrument.
Summary of the invention
This patent for existing employing LOAD CELLS for moving material flowable state electronic scales Problems existing, especially for people's inertia mistake in understanding all the time, a kind of streams electronic scales is proposed, that is: with slideway replace Belt Conveying material disturb to eliminate rotatable parts, parallel feeding chute is installed to eliminate material loading in chute front end of weighing time disturb perpendicular to the impulsive force of chute of weighing, make its Impact direction vertically with chute of weighing disturb to eliminate friction force during sensor installation, realize wide-angle tilt to solve various specific question.It efficiently solves all problems of current go-on-go scale metering units.
The technical scheme that this patent is taked is: a kind of streams electronic scales, it comprises bracing frame and is fixedly installed at least one LOAD CELLS on bracing frame, LOAD CELLS is fixedly installed chute of weighing, it is characterized in that weighing track length direction horizontal by an angle A, 0 ° of < A < 90 ° (material landing direction is appointed as in track length direction of weighing); LOAD CELLS bearing end be rigidly connected with chute of weighing and LOAD CELLS design to carry Impact direction vertical with track length direction of weighing; Also be provided with the Weighing control instrument be electrically connected with LOAD CELLS.
The concrete feature of this programme also has, described in weigh the rigid body that chute hard wear-resistant material makes, the Baltimore groove in both ends open or plane or bobbin body shape structure.
Chute front of weighing is provided with independently feeding chute.The feeding chute be arranged at before chute feed end of weighing guarantee from the material of production line pay-off the direction of motion of the discharge end of feeding chute become and the lubricating substance direction of chute of weighing consistent.Concrete relative position should meet impulsive disturbance large to output generation of weighing when not making material slide into chute of weighing from feeding chute.
Feeding chute is the rigid body made with hard wear-resistant material; Feeding chute discharging opening is suitable and keep gap with chute charging aperture of weighing, the discharging direction of feeding chute discharging opening is parallel with chute lubricating substance direction of weighing, feeding chute discharge end extends to the top of chute of weighing naturally, the chute bottom surface of feeding chute is higher than the bottom surface of chute of weighing, feeding chute and maintenance between chute of weighing independently, do not contact.Feeding chute can adopt same material, same section structure, same lubricant method with chute of weighing; Feeding chute also according to material special shape, can adopt different section profile, finally at the profile that discharging opening becomes and chute of weighing is same; Feeding chute can with chute different length of weighing; Feeding chute can be rigidly attached on bracing frame, also can be rigidly attached on production line pay-off, can also be independent support.
Described LOAD CELLS is shearing force LOAD CELLS or single-point balance beam sensor or column type sensor or wheel spoke type sensor.Generally being arranged on rigidity weighs below chute.According to chute width, LOAD CELLS must have certain thickness, can anti-side-sway, unbalance loading.
According to material, rigidity is weighed the friction factor of chute and production line requirement, weigh chute and level A(in a certain angle of rigidity meets and needs the material of dynamic weighing on rigidity weighs chute to slide, the modes such as rolling are parallel to rigidity chute of weighing and pass through), carrier is slid past as what be weighed material, the weigh bearing end of chute and LOAD CELLS (or force snesor) of rigidity is rigidly connected, and it is vertical to make LOAD CELLS design Impact direction and rigidity track length direction (i.e. material traffic direction) of weighing, stiff end and the bracing frame of LOAD CELLS are rigidly connected, bracing frame is rigidity, its position is not moved because material passes through, LOAD CELLS is electrically connected with Weighing control instrument by cable.
Rigidity weigh the design consideration material size of chute length, travelling speed and weighing instrument response speed and determine.Generally, 1.5 times that table top material movement direction length is greater than the most length direction of material are measured.The angle of chute and the level of weighing and bracing frame install the angle determination principle of bottom surface to LOAD CELLS: can according to the feeding speed of the arrangement of production line rate, space, production scene, Weighing control instrument range and sampling time and resolution, material and weigh friction factor, feed mechanism between chute and feeding chute, material shapes of materials, warm and humid state, Weighing control instrument need material weigh on chute accelerate, at the uniform velocity, deceleration etc. requires and determines, angle can from being greater than 0 ° to close to 90 °; Also automatic angle mechanism can be made, on-the-spot artificial or Lookup protocol.
The installed surface of the bearing end of LOAD CELLS may be vertical with design Impact direction, also may be parallel; The installed surface of stiff end also may be vertical with design Impact direction, also may be parallel.Weigh chute and bracing frame coordinates mounting means with the concrete of LOAD CELLS, can adjust according to the concrete LOAD CELLS adopted.The LOAD CELLS that this programme embodiment adopts is that the installed surface of bearing end is parallel with the installed surface of stiff end and all vertical with design Impact direction.
For expanding weigh range or material metage area or material Negotiation speed, weigh chute area or load capacity must be strengthened, LOAD CELLS is 1 or 2 or 4 or more even number, they must be rigidly connected with chute of weighing, their design Impact direction all must be vertical with track length direction of weighing, and their installation bottom surface must be parallel.
Also must meet when described LOAD CELLS is rectangle LOAD CELLS and make gravity not produce component in LOAD CELLS side facet normal direction.
Weighing control instrument is dynamic continuous weighting in material landing process.During equipment debugging, first to its static weighing Calibration, then operation state performance is revised.Weighing control instrument can be independently, or A/D module adds the array configurations such as display module, also can be embedded in in other equipment, or control display system a set of with other collaborative share, can also be PC etc.
The beneficial effect of this programme is: 1, thoroughly solve the dynamic weighing precision problem of streams electronic scales, the dynamic weighing meeting more occasions requires: relative to the belt conveyer scale adopting LOAD CELLS, eliminate cylinder, belt, bearing, motor, after Timing Belt, scale body is reduced to a chute of weighing, the impost of this body structure alleviates greatly, can greatly be improved by the ratio claiming the weight of material to account for transducer range, again because rigidity track length of weighing is vertical with sensor design loading direction, sensor exports just can be larger, the resolution of instrument signal can be higher, scale body does not have rotary part, and would not produce scale running body amount of unbalance, weighing precision can improve greatly, do not have running gear, its cost efficiency improves certainly greatly, do not have moving component to be easy to realize high-grade water, wet, dirt protection and the requirement of food medical and health, the market of dynamic weigher will be larger.Have a strong impact on the efficiency of existing go-on-go scale because belt speed is limited, and this programme can realize quick check weighing by weigh chute angle and material loading speed of adjustment.
If 2 weigh chute tilt but sensor levels place, F=H+G × cos
2a+ f × sinA, F seriously affect by uncertain random friction.Visible, due to LOAD CELLS design Impact direction and track length direction (i.e. material traffic direction) at right angle setting of weighing, friction force is made not produce component at LOAD CELLS design Impact direction, completely eliminate the interference of friction force to weighing data, the dynamic weight of LOAD CELLS exports not by the impact of material material, material state, friction factor.
3, because LOAD CELLS design Impact direction and rigidity are weighed track length direction (i.e. material traffic direction) at right angle setting, make LOAD CELLS experience weight of material to export with as far as possible large electric signal at the whole components on chute normal of weighing, be more conducive to instrument controlling of sampling.Effective output that this case LOAD CELLS experiences weight of material is GcosA.If weighed, chute tilts but sensor levels placement, and this effectively exports is then Gcos
2a.Visible, this case output is 1/cosA times of horizontal positioned.
If 4 LOAD CELLS horizontal positioned, inclination angle is larger, cos
2a is less.The gap that the weight of material electric signal of 2 schemes exports is larger.This case can solve chute of weighing and to tilt but numerous needs that LOAD CELLS horizontal positioned scheme can't resolve are weighed greatly the problem at chute inclination angle, the material dynamic weighing of as higher in: friction factor or thickness, need the dynamic weighing of high temperature or the cryogenic object passed through at a high speed, production line high transfer rate requires, the dynamic weighing of horizontal direction limited space on production line.
5, due to LOAD CELLS design Impact direction and track length direction (i.e. material traffic direction) at right angle setting of weighing, material effective weight G is exported in load cell signal, i.e. F=(H+G) cosA in the ratio of 1:1 with the invalid H that conducts oneself with dignity of physical construction of chute of weighing.And chute of weighing tilts but F=H+G × cos in sensor levels placement schemes
2a+ f × sinA, G and H presses cos
2the ratio of A:1 exports.Visible, this case relative mechanical structure invalid signals, useful signal accounting is larger, lower to the requirement of instrument and resolution thereof.
6, Weighing control instrument using the static accurate weight of actual material to the ratio of this material test result of weighing of Weighing control instrument display when weighing landing on chute as correction factor or using the weight of its special calibrating object to the ratio of test result of weighing of this demarcation thing Weighing control instrument display when weighing landing on chute as correction factor, make the weight of the chute of weighing tilted value of weighing more accurate.Inclination angle detection device measuring angle need not be adopted to show that coefficient revises the weight output valve of Weighing control instrument by formula scales again.
7, the feeding chute being arranged at chute feed end front portion of weighing guarantee from the material of production line pay-off the direction of motion of the discharge end of feeding chute become and the length direction of chute of weighing consistent, perpendicular to the interference of the impulsive force weighing results of chute of weighing during elimination material loading, substantially increase weighing precision.
Accompanying drawing explanation
Fig. 1 is the structure composition schematic diagram of this streams electronic scales.
In Fig. 1: 1-weighs chute; 2-LOAD CELLS or force snesor; 3-bracing frame; 4-Weighing control instrument; 6-instrument bearing; 7-feeding chute; 8-feed bin; 9-moving material stream.
Fig. 2 is the structure front elevation of this streams electronic scales.
Fig. 3 is the force diagram of LOAD CELLS.
Fig. 4 is the force diagram of chute of weighing.
Fig. 5 is that material is at the force diagram on chute of weighing.
Embodiment
As shown in Figure 1-2, a kind of streams electronic scales, it comprises bracing frame 3 and is fixedly installed at least one LOAD CELLS 2 on bracing frame 3, LOAD CELLS 2 is fixedly installed chute 1 of weighing, weigh chute 1 length direction horizontal by an angle A, 0 ° of < A < 90 °; LOAD CELLS 2 bearing end is rigidly connected with chute 1 of weighing and LOAD CELLS 2 designs that to carry Impact direction vertical with chute 1 length direction of weighing; Described LOAD CELLS 2 makes gravity not produce component in LOAD CELLS 2 side facet normal direction for also meeting during rectangle LOAD CELLS.Also be provided with the Weighing control instrument 4 be electrically connected with LOAD CELLS 2.Rigid body, the Baltimore groove in both ends open or bobbin body shape structure that described chute 1 hard wear-resistant material of weighing is made.As the trough body structure that: chute 1 of weighing can be upper and LOAD CELLS 2 connecting elements of reprocessing after stainless steel bending.
Weighing, chute 1 front is provided with independently feeding chute 7.The feeding chute 7 be arranged at before chute 1 feed end of weighing guarantee from production
linemoving material stream 9 become consistent with the lubricating substance direction of chute 1 of weighing in the direction of motion of the discharge end of feeding chute 7.Concrete relative position should meet impulsive disturbance large to output generation of weighing when not making moving material stream 9 slide into chute 1 of weighing from feeding chute 7.
Feeding chute 7 is the rigid bodies made with hard wear-resistant material; Feeding chute 7 discharging opening is suitable and keep gap with chute 1 charging aperture of weighing, the discharging direction of feeding chute 7 discharging opening is parallel with chute 1 lubricating substance direction of weighing and have and cover overlap, but do not contact, the chute surface of feeding chute 7 is slightly higher than the chute surface of chute 1 of weighing, namely feeding chute 7 discharge end extends to the top of chute 1 of weighing naturally, the chute bottom surface of feeding chute is higher than the bottom surface of chute 1 of weighing, and feeding chute and weigh between chute and keep independent, does not contact.Feeding chute 7 can adopt same material, same section structure, same lubricant method with chute 1 of weighing; Feeding chute 7 also according to moving material stream 9 special shape, can adopt different section profile, finally at the profile that discharging opening becomes and chute 1 of weighing is same; Feeding chute 7 can with chute 1 different length of weighing; Feeding chute 7 can be rigidly attached on bracing frame 3, also can be rigidly attached to production
lineon, can also be independent support.
Described LOAD CELLS 2 is shearing force LOAD CELLS or single-point balance beam sensor or column type sensor or wheel spoke type sensor.Below the chute 1 of weighing generally being arranged on rigidity.According to chute width, LOAD CELLS 2 must have certain thickness, can anti-side-sway, unbalance loading.
According to moving material stream 9 to the friction factor of chute 1 of weighing and production line requirement, chute 1 of weighing meets with level A(in a certain angle needs the moving material stream 9 of dynamic weighing weighing on chute 1 to slide, the modes such as rolling are parallel to chute 1 of weighing and pass through), carrier is slid past as what be weighed moving material stream 9, chute 1 of weighing is rigidly connected with the bearing end of LOAD CELLS or force snesor 2, and it is vertical to make LOAD CELLS 2 design Impact direction and rigidity chute 1 length direction (i.e. material traffic direction) of weighing, stiff end and the bracing frame 3 of LOAD CELLS 2 are rigidly connected, bracing frame 3 is rigidity, its position is not moved because moving material stream 9 passes through, LOAD CELLS 2 is electrically connected with Weighing control instrument 4 by cable.
The response speed of the design consideration material size of chute 1 length of weighing, travelling speed and Weighing control instrument 4 and determining.Generally, 1.5 times that table top material movement direction length is greater than the most length direction of material are measured.The angle of chute 1 and the level of weighing and bracing frame 3 pairs of LOAD CELLS 2 install the angle determination principle of bottom surface: can according to the feeding speed of the arrangement of production line rate, space, production scene, Weighing control instrument 4 range and sampling time and resolution, moving material stream 9 and weigh friction factor, feed mechanism between chute 1 and feeding chute 7, moving material stream 9 shapes of materials, warm and humid state, Weighing control instrument 4 need moving material stream 9 weigh on chute 1 accelerate, at the uniform velocity, deceleration etc. requires and determines, angle can from being greater than 0 ° to close to 90 °; Also automatic angle mechanism can be made, on-the-spot artificial or Lookup protocol.
The installed surface of the bearing end of LOAD CELLS 2 may be vertical with design Impact direction, also may be parallel; The installed surface of stiff end also may be vertical with design Impact direction, also may be parallel.Weigh chute 1 and bracing frame 3 coordinates mounting means with the concrete of LOAD CELLS 2, can adjust according to the concrete LOAD CELLS 2 adopted.The LOAD CELLS 2 that this programme embodiment adopts is that the installed surface of bearing end is parallel with the installed surface of stiff end and all vertical with design Impact direction.
To weigh area or moving material stream 9 Negotiation speed for expanding weigh range or moving material stream 9, weigh chute 1 area or load capacity must be strengthened, LOAD CELLS 2 is 1 or 2 or 4 or more even numbers, they must be rigidly connected with chute 1 of weighing, their design Impact direction all must be vertical with chute 1 length direction of weighing, and their installation bottom surface must be parallel.
Weighing control instrument 4 is dynamic continuous weighting in moving material stream 9 landing process.During equipment debugging, first to its static weighing Calibration, then operation state performance is revised: using the accurate weight of actual moving material stream 9 to the ratio of this moving material stream 9 test result of weighing that Weighing control instrument 4 shows when weighing landing on chute 1 as correction factor or using the weight of its special calibrating thing to the ratio of this demarcation thing test result of weighing that Weighing control instrument 4 shows when weighing landing on chute 1 as correction factor.Weighing control instrument 4 can be independently, or A/D module adds the array configurations such as display module, also can be embedded in in other equipment, or control display system a set of with other collaborative share, can also be PC etc.
Welding with the manganese steel plate that 12mm is thick the upper table surface made is the rectangle of length of side 5000mm*2000mm, shelves limit height is smooth the weigh passage of trough body structure as moving material stream 9 landing of 500mm, the long 188mm of PW16A single point weighing cell 2(of the 500kg range produced respectively by bolt and 2 German HBM companies in the middle part of two ends below this chute 1 cell body, wide 63.5mm, high 62.3mm, deadweight 1800g) force side be rigidly connected, chute 1 length direction (i.e. long side direction) and level are 60 ° of angles, LOAD CELLS 2 base end being rigidly connected with the mounting plane in 60 ° of angles with level by bolt and bracing frame 3, bracing frame 3 keeps static at weighing process.The high rigid smooth feeding chute 7 being the trough body structure of 500mm and falling from feed bin 8 as moving material stream 9 in rectangle that the upper table surface made is length of side 2000mm*1700mm, shelves limit is welded again with the manganese steel plate that 12mm is thick, rigidly fix and be arranged on bracing frame 3, its track length direction is consistent with track length direction of weighing, with chute of weighing at the overlapping 20mm of length direction, its bottom surface exceeds the chute chute face 10mm that weighs.Be arranged at the feeding chute 7 of chute 1 feed end front portion of weighing, guarantee from the moving material stream 9 of the feed bin 8 in production line pay-off the direction of motion of the discharge end of feeding chute 7 become and the length direction of chute 1 of weighing consistent.2 LOAD CELLS 2 are electrically connected to Weighing control instrument 4.Moving material stream 9 is bulk cargo ore, is fallen by feed bin 8.Weighing control instrument 4 can select PLAC-5100 instrument, and bracing frame 3 is weldment, and there is foot bolt at heavy 4000kg(such as scene, and bracing frame 3 can significantly loss of weight).On slideway, fill a speed pickup again, detect the speed of streams.After machinery and instrument are installed and are connected, first static weight demarcation (material of known weight being fixed on gauged instrument on slideway export) is carried out to moving material stream electronic scales, then the streams of known weight and flow velocity is allowed to slip into by feeding slideway 7 chute 1 of weighing, and slide along chute 1 of weighing, streams total length under this weight is calculated according to time used and speed, moment contained material general assembly (TW) can be calculated in slideway length, with this control instrument of weighing is exported and carry out dynamic corrections.Namely correction factor feeding Weighing control instrument 4 be can be used for the dynamic weighing of bulk cargo ore.
This programme, significantly reducing under manufacturing cost and maintenance cost, also significantly improves dynamic weighing precision, significantly can also improve the grade of dust-proof, waterproof, the healthy prevention.
See Fig. 3, Fig. 4, Fig. 5, material is when weighing on chute 1, and the force analysis of LOAD CELLS 2, chute 1 of weighing, moving material stream 9 is as follows.Wherein:
Weigh chute 1 couple of horizontal line angle: A
Moving material stream 9 weight: G
Moving material stream 9 is to chute 1 normal pressure: the N=GcosA that weighs
Moving material stream 9 friction force: f
Chute 1 of weighing is conducted oneself with dignity: H
Chute 1 of weighing is added to the pressure that LOAD CELLS 2 designs loading direction: F=N+HcosA
=(H+G)cosA
The voltage signal U=(F/S that LOAD CELLS 2 exports) * K*E=(H+G) cosA*K*E/S.
S: LOAD CELLS 2 rated load
K: LOAD CELLS 2 sensitivity coefficient
E: LOAD CELLS 2 driving voltage.
Claims (6)
1. a streams electronic scales, it comprises bracing frame and is fixedly installed at least one LOAD CELLS on bracing frame, LOAD CELLS is fixedly installed chute of weighing, it is characterized in that weighing chute material landing direction horizontal by an angle A, 0 ° of < A < 90 °; LOAD CELLS bearing end be rigidly connected with chute of weighing and LOAD CELLS design to carry Impact direction vertical with track length direction of weighing; Also be provided with the Weighing control instrument be electrically connected with LOAD CELLS.
2. streams electronic scales according to claim 1, the rigid body that chute hard wear-resistant material of weighing described in it is characterized in that is made, the Baltimore groove in both ends open or bobbin body shape structure.
3. streams electronic scales according to claim 1, is characterized in that chute front of weighing is provided with feeding chute.
4. streams electronic scales according to claim 3, is characterized in that feeding chute is the rigid body made with hard wear-resistant material; Feeding chute discharging opening is suitable and keep gap with chute charging aperture of weighing, the discharging direction of feeding chute discharging opening is parallel with chute lubricating substance direction of weighing, feeding chute discharge end extends to the top of chute of weighing naturally, the chute bottom surface of feeding chute higher than the bottom surface of chute of weighing, feeding chute and weigh between chute and keep independent.
5. streams electronic scales according to claim 1, is characterized in that described LOAD CELLS is shearing force LOAD CELLS or single-point balance beam sensor or column type sensor or wheel spoke type sensor.
6. streams electronic scales according to claim 1, is characterized in that LOAD CELLS is 1 or 2 or 4 or more even number.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006129.3U CN204373755U (en) | 2015-01-06 | 2015-01-06 | Streams electronic scales |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006129.3U CN204373755U (en) | 2015-01-06 | 2015-01-06 | Streams electronic scales |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457929A (en) * | 2015-01-06 | 2015-03-25 | 山东西泰克仪器有限公司 | Material flow electronic scale |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457929A (en) * | 2015-01-06 | 2015-03-25 | 山东西泰克仪器有限公司 | Material flow electronic scale |
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