CN201218748Y - Electronic belt conveyor scale capable of real-time compensation for belt tension change - Google Patents

Electronic belt conveyor scale capable of real-time compensation for belt tension change Download PDF

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Publication number
CN201218748Y
CN201218748Y CNU2007201769191U CN200720176919U CN201218748Y CN 201218748 Y CN201218748 Y CN 201218748Y CN U2007201769191 U CNU2007201769191 U CN U2007201769191U CN 200720176919 U CN200720176919 U CN 200720176919U CN 201218748 Y CN201218748 Y CN 201218748Y
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belt
belt tension
data
real
variation
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CNU2007201769191U
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Chinese (zh)
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周明远
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Abstract

The utility model discloses an electronic belt scale, comprising a scale frame, a weighting instrument, and also comprising a detection device for detecting variation of belt tension; the weighting instrument is provided with a data input port for receiving real-time data detected by the detection device; the weighting instrument is inside provided with a belt tension compensation factor processing circuit; the compensated material actual weight data is obtained by obtaining a ratio of an initial electric signal F[0](t[0]) to a real-time electric signal F[0](t[n]) detected by the detection device, followed by multiplying by the material weight data detected by a weight sensor, the data is subjected to processing of the weighting instrument to acquire the actual weight of weighted material. The utility model attains the compensation factor of the variation of belt tension by measuring the variation of pressure value applied on a belt machine by fixed objects, in order to eliminate influence caused by the variation of belt tension and to improve weighting precision of the electronic belt scale.

Description

The belted electronic balance that a kind of energy real-Time Compensation belt tension changes
Technical field
The utility model relates to the belted electronic balance that a kind of energy real-Time Compensation belt tension changes.
Background technology
Belted electronic balance is the equipment that can carry out the dynamic real-time metering when band conveyor transmits material in enormous quantities to material, because of it installs and uses easy, the reading all trades and professions that are widely used in directly perceived.But the weighing precision of existing belted electronic balance can't maintain a long-term stability after demarcating (verification), can only be used for the occasions lower such as enterprises examination to accuracy requirement, import and export harbour, coal-burning power plant etc. at bulk goods and require the enterprise of accurate measurement and the Belt Scales that department also must install the expensive hundreds thousand of units of a cover more in a large number, once a day even carry out physical goods inspection every day for several times, expend a large amount of human and material resources and financial resources, and the belted electronic balance of a cover only needs tens thousand of units.Why the precision of existing belted electronic balance can not maintain a long-term stability, both at home and abroad the consistent random variation of thinking to come from belt tension (essence is elasticity coefficient) of industry.
As shown in Figure 1, on the belt feeder material 2 of weighing section across belt 3 with its weight transfer on the carrying roller 4 and scale frame 5 of belted electronic balance, the scale frame changes into corresponding electric signal with the gravity that affords by load sensor 6, and this electric signal is sent into the weight that weighing instrument can show material after treatment.And the bounce f's of gravity P that the actual power F that affords of load sensor (being the scale frame) is the weighing section material and belt (thereby because stressed generation deformation generation) is poor: F=P-f, the size of this bounce f depends on that not only suffered gravity P depends on that also belt tension is the elasticity coefficient of belt.Therefore:
F(t)＝P(t)-f(t)
The belt weight of weighing section be zero point tare weight can remove so do not consider by school zero.Wherein, bounce f (t)=P (t) K (t), K in the formula (t) are that random variation is the stochastic variable of time along with the variation of environment temperature, humidity, belt water cut and wear intensity or the like factor for the elasticity coefficient of belt.Following formula is convertible into following formula:
F (t)=P (t)-P (t) K (t) is promptly:
F(t)＝P(t)[1-K(t)]
This shows: because the randomness of K (t), even under the constant situation of P (t), F (t) remains at random.So the random variation of belt tension (being elasticity coefficient K (t)) causes the precision of belted electronic balance not maintain a long-term stability.
Summary of the invention
The purpose of this utility model provides the belted electronic balance that a kind of energy real-Time Compensation belt tension changes, and can eliminate the weighing error that the belt tension changing factor causes, and improves weighing precision.The utility model is achieved in that and comprises scale frame and the weighing instrument that is used for weighing, the scale frame is provided with LOAD CELLS, weighing instrument is provided with data-in port, the data that LOAD CELLS records are sent in the weighing instrument by data-in port, it is characterized in that: comprise that also is used for detecting the pick-up unit that belt tension changes;
The weighing instrument is provided with the data-in port that is used for receiving the real time data that pick-up unit is surveyed that detects the belt tension variation;
Be provided with belt tension penalty coefficient λ treatment circuit in the weighing instrument, this circuit is used for obtaining the initial electrical signal F that above-mentioned detection device is surveyed 0(t 0) and real-time electric signal F 0(t n) ratio, i.e. λ=F 0(t 0)/F 0(t n), and the weight of material data that this penalty coefficient λ and weighing sensor record are multiplied each other, obtain the material actual weight data after the compensation, these data are handled through the weighing instrument and are obtained institute's scale material actual weight.
The pick-up unit that described detection belt tension changes comprises: a following belt that is located at belt feeder is the pinch roller and the mounting bracket thereof of return phase top; One or several detect the detecting sensor that belt tensions change, and are used for measuring pinch roller and are applied to electric pressure signal on the belt, and this electric pressure signal is transferred to the weighing instrument; Described detecting sensor is fixed on the mounting bracket of pinch roller top, and pinch roller is provided with the pull bar that is rotationally connected with the pinch roller rotating shaft, and the pull bar upper end connects with the detecting sensor stress point.
In order to prevent that pinch roller from swinging back and forth in belt direction of travel, mounting bracket is provided with the vertically-guided groove that the pinch roller rotating shaft is moved up and down.
The pick-up unit that described detection belt tension changes also can adopt the base-supporting structure, comprising: comprise that a following belt that is placed on belt feeder by roll mode is return phase, the hypodermis band application is reinforced the error detecting code of level pressure power; One is located at down the belt below and is used for detecting the pick-up unit that above-mentioned error detecting code is applied to the electric pressure signal on the belt, this pick-up unit comprises: mounting bracket, detecting sensor, carrying roller and pallet, detecting sensor is fixed on the support, carrying roller is fixed on the pallet by rotating shaft, and the pallet below connects with the detecting sensor stress point.
The following principle that is based on the utility model realizes: as shown in Figure 1, the material that the load sensor detection obtains is applied to pressure F (t)=P-f (t)=P-PK (the t)=P (1-K (t)) on the belt; The weight of the fixed weight that the detection of belt tension detecting sensor obtains is applied to the pressure F on the belt 0(t)=P 0-f 0(t)=P 0-P 0K (t)=P 0(1-K (t)).At time t 0With t n, suppose P (t 0)=P (t n)=P promptly obtains:
F(t 0)＝P〔1-K(t 0)〕 F(t n)＝P〔1-K(t n)〕
F 0(t 0)＝P 0〔1-K(t 0)〕 F 0(t n)＝P 0〔1-K(t n)〕
F (t 0), F (t n) record by belted electronic balance; F 0(t 0), F 0(t n) value record by being used for detecting the detecting sensor that belt tension changes.
If t 0Be the nominal time, write down F (t with instrument this moment 0) value just represented weight P (this promptly demarcates or verification operation); Write down and preserve F again by instrument 0(t 0) value, t at any time nAllow instrument to detected F (t n) and F 0(t n) value does following computing:
F ( t n ) · F 0 ( t 0 ) F 0 ( t n ) = P ( 1 - K ( t n ) ) · P 0 ( 1 - K ( t 0 ) ) P 0 ( 1 - K ( t n ) ) = P ( 1 - K ( t 0 ) ) = F ( t 0 )
That is: F (t n) F 0(t 0)/F 0(t n)=F (t 0)=P (1-K (t 0))
The material P of weight just can show same value F (t in the different time in instrument like this, equally 0).For different P values, because coefficient (1-K (t 0)) constant, F just becomes the linear function of P and no longer has randomness, thereby has guaranteed the long-term stability of belt conveyer scale weighing precision.
F 0 ( t 0 ) F 0 ( t n ) = ( 1 - K ( t 0 ) ) ( 1 - K ( t n ) ) Be the penalty coefficient λ that belt tension changes.
The utility model is by the variation of force value in different time on the following belt of measuring fixing weight and being applied to belt feeder, the penalty coefficient that finds belt tension to change, change the influence that brings thereby eliminate belt tension, improve the weighing precision of belted electronic balance.
Description of drawings
Fig. 1 is the utility model principle of work synoptic diagram.
Fig. 2 is that the utility model detects the pick-up unit structural representation that belt tension changes.
Fig. 3 is along A-A line cut-open view among Fig. 2.
Fig. 4 is that the utility model detects another example structure synoptic diagram of pick-up unit that belt tension changes.
Fig. 5 is the left view of Fig. 4.
Fig. 6 is the utility model flow diagram of weighing.
Embodiment
As shown in Figure 1, be provided with on the following belt 8 of belt feeder and detect the pick-up unit that belt tension changes, this device is included in following belt 8 tops of belt feeder and places a weight, and this weight is a pinch roller 7; Belt tension detecting sensor 6 is set, is used for measuring weight and is applied to electric pressure signal on the belt; Pinch roller 7 can be positioned at down on the belt 8 by guide piece, concrete structure as shown in Figures 2 and 3, mounting bracket 12 is provided with the vertically-guided groove 14 that pinch roller rotating shaft 11 is moved up and down, two detecting sensors 6 are fixed on the mounting bracket 12 of pinch roller top by screw 10, pinch roller 7 both sides are provided with the pull bar 9 that is rotationally connected with pinch roller rotating shaft 11, this detecting sensor 6 can adopt the shear beam sensor, and each pull bar 9 upper end is fixed on the pull-type annex of detecting sensor 6.Pinch roller rotating shaft 11 two ends are fixed with is equipped with balancing weight 13.
The electric signal that belt tension detecting sensor 6 records is that pinch roller is pinch roller weight P to the belt applied pressure 0Bounce f with belt (thereby because stressed generation deformation generation) 0Difference F 0=P 0-f 0Electric signal; As shown in Figure 6, with of weighing instrument input port 2 inputs of this electric signal, get original pressure electric signal F respectively by belted electronic balance 0(t 0) and real-time pressure electric signal F 0(t n), ask its ratio, i.e. λ=F 0(t 0)/F 0(t n), the electric pressure signal F (t) that the gage probe of this ratio and belted electronic balance is recorded multiplies each other, again through the actual measurement weight after eliminating the belt tension changing factor of calculating of belted electronic balance weighing instrument.
The pick-up unit that detects the belt tension variation also can adopt the base-supporting structure.Concrete structure as shown in Figure 4 and Figure 5, promptly returning the error detecting code of placing above the belt at the following belt 8 of belt feeder is chain code 17; Pick-up unit is made up of mounting bracket 12, detecting sensor 6, carrying roller 16 and pallet 15, and two groups of carrying rollers 16 are fixed on the pallet 15, and four jiaos of pallet 15 belows connect with four detecting sensor 6 stress points that are fixed on screw 10 on the support 12 respectively.The pressure that chain code 17 is applied to down on the belt 8 is transferred on the carrying roller 16 by belt, is transferred on the detecting sensor 6 by 15 on pallet again, makes detecting sensor record electric pressure signal.

Claims (4)

1, the belted electronic balance of a kind of energy real-Time Compensation belt tension variation, comprise the scale frame and the weighing instrument that are used for weighing, the scale frame is provided with LOAD CELLS, weighing instrument is provided with data-in port, the data that LOAD CELLS records are sent in the weighing instrument by data-in port, it is characterized in that: comprise that also is used for detecting the pick-up unit that belt tension changes;
The weighing instrument is provided with the data-in port that is used for receiving the real time data that pick-up unit is surveyed that detects the belt tension variation;
Be provided with belt tension penalty coefficient λ treatment circuit in the weighing instrument, this circuit is used for obtaining the initial electrical signal F that above-mentioned detection device is surveyed 0(t 0) and real-time electric signal F 0(t n) ratio, i.e. λ=F 0(t 0)/F 0(t n), and the weight of material data that this penalty coefficient λ and weighing sensor record are multiplied each other, obtain the material actual weight data after the compensation, these data are handled through the weighing instrument and are obtained institute's scale material actual weight.
2, the belted electronic balance of energy real-Time Compensation belt tension according to claim 1 variation is characterized in that the pick-up unit that described detection belt tension changes comprises:
A following belt [8] that is located at belt feeder is the pinch roller [7] and the mounting bracket [12] thereof of return phase top;
One or several detect the sensor [6] that belt tensions change, and are used for measuring pinch roller and are applied to electric pressure signal on the belt, and this electric pressure signal is transferred to the weighing instrument;
Described detecting sensor [6] is fixed on the mounting bracket [12] of pinch roller [7] top, and pinch roller is provided with the pull bar [9] that is rotationally connected with pinch roller rotating shaft [11], and pull bar [9] upper end connects with detecting sensor [6] stress point.
3, the belted electronic balance of energy real-Time Compensation belt tension according to claim 2 variation, it is characterized in that: mounting bracket [12] is provided with the vertically-guided groove [14] that pinch roller rotating shaft [11] is moved up and down.
4, according to claim 1 can real-Time Compensation the belted electronic balance that changes of belt tension, it is characterized in that the pick-up unit that described detection belt tension changes comprises: comprise a following belt [8] that is placed on belt feeder by roll mode be return phase, to the stressed error detecting code of hypodermis band application [17]; One is located at down the belt below and is used for detecting the pick-up unit that above-mentioned error detecting code is applied to the electric pressure signal on the belt, this pick-up unit comprises: mounting bracket [12], detecting sensor [6], carrying roller [16] and pallet [15], detecting sensor [6] is fixed on the mounting bracket [12], carrying roller [16] is fixed on the pallet [15] by rotating shaft, and pallet [15] below connects with detecting sensor [6] stress point.
CNU2007201769191U 2007-09-21 2007-09-21 Electronic belt conveyor scale capable of real-time compensation for belt tension change Expired - Fee Related CN201218748Y (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CNU2007201769191U CN201218748Y (en) 2007-09-21 2007-09-21 Electronic belt conveyor scale capable of real-time compensation for belt tension change

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103017872A (en) * 2012-12-04 2013-04-03 重庆市渝溪产业（集团）有限公司 Dynamic metering device
CN105651363A (en) * 2016-03-31 2016-06-08 南京三埃工控有限公司 Flat supporting roller belt weigher realizing large flow
CN111157085A (en) * 2019-12-26 2020-05-15 中交一航局安装工程有限公司 Array type belt conveyor weighing device and installation process thereof
CN114396995A (en) * 2022-01-14 2022-04-26 赛摩电气有限公司 Weighing device and metering method of belt feeder

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103017872A (en) * 2012-12-04 2013-04-03 重庆市渝溪产业（集团）有限公司 Dynamic metering device
CN105651363A (en) * 2016-03-31 2016-06-08 南京三埃工控有限公司 Flat supporting roller belt weigher realizing large flow
CN111157085A (en) * 2019-12-26 2020-05-15 中交一航局安装工程有限公司 Array type belt conveyor weighing device and installation process thereof
CN114396995A (en) * 2022-01-14 2022-04-26 赛摩电气有限公司 Weighing device and metering method of belt feeder
CN114396995B (en) * 2022-01-14 2024-05-07 赛摩电气有限公司 Weighing device and metering method for belt feeder

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C17 Cessation of patent right
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Granted publication date: 20090408

Termination date: 20100921