Summary of the invention
Technical matters to be solved by this invention is to provide a kind of tobacco elasticity on-line detection device and method thereof, is used for the elasticity of pipe tobacco is realized online detection.
To achieve these goals, the invention provides a kind of tobacco elasticity on-line detection device, it is characterized in that, comprise mounting bracket, at least two pipe tobacco measuring thickness devices, conveying belt, data acquisition processing system;
Described pipe tobacco measuring thickness device comprises the first pipe tobacco measuring thickness device, the second pipe tobacco measuring thickness device that is positioned at described conveying belt top, the described first pipe tobacco measuring thickness device, the described second pipe tobacco measuring thickness device are set in turn on the described mounting bracket with the spacing of setting along the direction of motion of described conveying belt, and the center line of the described first pipe tobacco measuring thickness device, the described second pipe tobacco measuring thickness device is consistent with the direction of motion of described conveying belt and be parallel to each other;
Described data acquisition processing system, connect the described first pipe tobacco measuring thickness device, the described second pipe tobacco measuring thickness device, be used for when pipe tobacco is carried on described conveying belt, gather first signal, secondary signal that thickness that the described first pipe tobacco measuring thickness device, the described second pipe tobacco measuring thickness device measure described pipe tobacco respectively obtains, and obtain the elasticity number of described pipe tobacco according to described first signal, described secondary signal.
Described tobacco elasticity on-line detection device, wherein, described data acquisition processing system comprises again:
Pipe tobacco thickness coefficient amending unit is used for the pipe tobacco thickness coefficient is revised, and obtains pipe tobacco thickness measuring correction factor;
The first tobacco elasticity processing unit connects described pipe tobacco thickness coefficient amending unit, is used for according to the described elasticity number of following tobacco elasticity calculated with mathematical model;
R=K
1 repaiies(H
1) * (H
2-H
1)/H
1* 100%
In the formula: R is the elasticity number (%) of pipe tobacco;
H
1Be first signal, the pipe tobacco thickness (mm) that the first pipe tobacco measuring thickness device is measured;
H
2Be secondary signal, the pipe tobacco thickness (mm) that the second pipe tobacco measuring thickness device is measured;
K
1 repaiies(H
1) be pipe tobacco thickness measuring correction factor.
Described tobacco elasticity on-line detection device, wherein, described first pipe tobacco measuring thickness device and/or the described second pipe tobacco measuring thickness device are pinch roller formula measuring thickness device, this pinch roller formula measuring thickness device comprises pinch roller, connecting rod, bolster, displacement transducer, transmitter;
Described bolster is connected with described pinch roller by described connecting rod, and described displacement transducer is connected with described bolster, and described first signal, described secondary signal are delivered to described data acquisition processing system by described transmitter.
Described tobacco elasticity on-line detection device, wherein, described displacement transducer is angular displacement sensor or linear movement pick-up.
Described tobacco elasticity on-line detection device, wherein, described on-line measuring device also comprises: pressure governor is used to regulate the pressure of described pinch roller to described pipe tobacco.
Described tobacco elasticity on-line detection device, wherein, described on-line measuring device also comprises: fixed material pipe, be positioned at the described first pipe tobacco measuring thickness device, described second pipe tobacco measuring thickness device the place ahead, be installed in the pipe tobacco feeding port place of described conveying belt, be used to stablize the thickness of described pipe tobacco on described conveying belt.
Described tobacco elasticity on-line detection device, wherein, described on-line measuring device also comprises: the moisture in cut tobacco measuring instrument, be installed in the place ahead of the described first pipe tobacco measuring thickness device or the rear of the described second pipe tobacco measuring thickness device, and be positioned at the center line top of the described first pipe tobacco measuring thickness device, the described second pipe tobacco measuring thickness device, be used for measuring greatly the time moisture of described pipe tobacco when the change of soil water content of described pipe tobacco.
Described tobacco elasticity on-line detection device, wherein, described data acquisition process also comprises:
The moisture in cut tobacco leveling factor unit is used for the moisture in cut tobacco coefficient is revised, and obtains the moisture in cut tobacco correction factor;
The second tobacco elasticity processing unit connects described pipe tobacco thickness amending unit, described moisture in cut tobacco leveling factor unit, is used for according to the described elasticity number of following tobacco elasticity calculated with mathematical model;
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * (H
2-H
1)/H
1* 100%
In the formula, K
2 repair(H
2O) be the moisture in cut tobacco correction factor.
Described tobacco elasticity on-line detection device, wherein, described moisture in cut tobacco leveling factor unit draws different K with the known elasticity number that contains the different in moisture pipe tobacco by demarcation
2 repair(H
2O) value, thus K obtained
2 Repair(H
2O), carry out fitting a straight line with least square method again or carry out the polygometry match and try to achieve K with the change of soil water content of pipe tobacco relation
2 repair(H
2O) and first relational expression between moisture in cut tobacco, moisture value, described first relational expression of measuring according to described moisture in cut tobacco measuring instrument obtained K
2 repair(H
2O).
Described tobacco elasticity on-line detection device, wherein, described on-line measuring device also comprises: the pipe tobacco temperature measuring set, be installed in the place ahead of the described first pipe tobacco measuring thickness device or the rear of the described second pipe tobacco measuring thickness device, and be positioned at the center line top of the described first pipe tobacco measuring thickness device, the described second pipe tobacco measuring thickness device, be used for measuring greatly the time temperature of described pipe tobacco when the temperature variation of described pipe tobacco.
Described tobacco elasticity on-line detection device, wherein, described data acquisition process also comprises:
Pipe tobacco temperature coefficient amending unit is used for the pipe tobacco temperature coefficient is revised, and obtains the pipe tobacco temperature correction coefficient;
The 3rd tobacco elasticity processing unit connects described pipe tobacco thickness amending unit, described moisture in cut tobacco leveling factor unit, described pipe tobacco temperature coefficient amending unit, is used for according to the described elasticity number of following tobacco elasticity calculated with mathematical model;
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * K
3 repair(T ℃) * (H
2-H
1)/H
1* 100%
In the formula, K
3 repair(T ℃) is the pipe tobacco temperature correction coefficient.
Described tobacco elasticity on-line detection device, wherein, described pipe tobacco temperature coefficient amending unit draws different K with the elasticity number of known different temperatures pipe tobacco by demarcation
3 repair(T ℃) value, thus K obtained
3 repairThe temperature variation relation of (T ℃) and pipe tobacco is carried out fitting a straight line with least square method again or is carried out the polygometry match and try to achieve K
3 repairSecond relational expression between (T ℃) and pipe tobacco temperature is obtained K according to described pipe tobacco temperature measuring set temperature value measured, described second relational expression
3 repair(T ℃) value.
To achieve these goals, the present invention also provides a kind of tobacco elasticity online test method, it is characterized in that, comprising:
Step 1, the pipe tobacco of conveying belt being carried by the first pipe tobacco measuring thickness device, the second pipe tobacco measuring thickness device carries out thickness measure;
Step 2, by data acquisition processing system gather the described first pipe tobacco measuring thickness device, the described second pipe tobacco measuring thickness device is measured first signal, the secondary signal that described pipe tobacco obtains respectively;
Step 3 is calculated the elasticity number of described pipe tobacco according to described first signal, described secondary signal.
Described tobacco elasticity online test method wherein, in the described step 3, further comprises: with the step of the elasticity number of the described pipe tobacco of following tobacco elasticity calculated with mathematical model;
R=K
1 repaiies(H
1) * (H
2-H
1)/H
1* 100%
In the formula: R is the elasticity (%) of pipe tobacco;
H
1Be first signal, the pipe tobacco thickness (mm) that the first pipe tobacco measuring thickness device is measured;
H
2Be secondary signal, the pipe tobacco thickness (mm) that the second pipe tobacco measuring thickness device is measured;
K
1 repaiies(H
1) be pipe tobacco thickness measuring correction factor.
Described tobacco elasticity online test method wherein, in the described step 3, further comprises: select the step of whether described pipe tobacco being carried out moisture correction and/or temperature correction according to the operating mode situation of described pipe tobacco.
Described tobacco elasticity online test method, wherein, in the described step 3, further comprise: when the change of soil water content of described pipe tobacco is big, adopt drimeter to measure the moisture of described pipe tobacco, and with the step of the elasticity number of the described pipe tobacco of following tobacco elasticity calculated with mathematical model:
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * (H
2-H
1)/H
1* 100%
In the formula, K
2 repair(H
2O) be the moisture in cut tobacco correction factor.
Described tobacco elasticity online test method, wherein, in the described step 3, the step of obtaining described moisture in cut tobacco correction factor is specially:
With the known elasticity number that contains the different in moisture pipe tobacco, draw different K by demarcation
2 repair(H
2O) value, thus K obtained
2 repair(H
2O), carry out fitting a straight line with least square method again or carry out the polygometry match and try to achieve K with the change of soil water content of pipe tobacco relation
2 repair(H
2O) and first relational expression between the moisture in cut tobacco, obtain K according to moisture value, described first relational expression measured
2 repair(H
2O).
Described tobacco elasticity online test method wherein, in the described step 3, further comprises: when the change of soil water content of described pipe tobacco is little, described pipe tobacco is not carried out the step of moisture correction, at this moment K
2 repair(H
2O)=1.
Described tobacco elasticity online test method wherein, in the described step 3, further comprises: when the temperature variation of described pipe tobacco is big, adopts temperature measuring set to measure the temperature of described pipe tobacco, and calculate the step of the elasticity number of described pipe tobacco with following formula:
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * K
3 repair(T ℃) * (H
2-H
1)/H
1* 100%
In the formula, K
3 repair(T ℃) is the pipe tobacco temperature correction coefficient.
Described tobacco elasticity online test method, wherein, in the described step 3, the step of obtaining described pipe tobacco temperature correction coefficient is specially:
With the elasticity number of known different temperatures pipe tobacco, draw different K by demarcation
3 repair(T ℃) value, thus K obtained
3 repairThe temperature variation relation of (T ℃) and pipe tobacco is carried out fitting a straight line with least square method again or is carried out the polygometry match and try to achieve K
3 repairSecond relational expression between (T ℃) and pipe tobacco temperature is obtained K according to temperature value measured, described second relational expression
3 repair(T ℃) value.
Described tobacco elasticity online test method wherein, in the described step 3, further comprises: when the temperature variation of described pipe tobacco is little, described pipe tobacco is not carried out the step of temperature correction, at this moment K
3 repair(T ℃)=1.
Compared with prior art, technique effect of the present invention is:
1) on-line measurement replaces manual static to measure, and can save time, and is laborsaving.
2) on-line measurement can in time, accurate, full-range detect tobacco elasticity value size, distribution, fluctuating range, numerical value dynamic trend in the pipe tobacco production run, thereby provides new monitoring means for producing the decision maker.
3) realization of the online detection means of tobacco elasticity can further realize the online process control of tobacco elasticity, dwindles the tobacco elasticity fluctuation range, improve the tobacco elasticity value, improves cigarette quality, save the pipe tobacco consumption, thereby brings bigger economic benefit for enterprise.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is made further more detailed description.
As shown in Figure 1a, be tobacco elasticity on-line detection device front view of the present invention; Fig. 1 b is a tobacco elasticity on-line detection device vertical view of the present invention.
Pick-up unit of the present invention adopts two pinch rollers, and first pinch roller is exerted pressure to pipe tobacco and made pipe tobacco generation deformation, second pinch roller detect the distortion situation of pipe tobacco behind the release of pressure, can calculate the elasticity size of pipe tobacco thus.The invention provides a kind of tobacco elasticity on-line detection device 100, comprise mounting bracket 1, at least two pipe tobacco measuring thickness devices, conveying belt 6 and data acquisition processing systems 7.The pipe tobacco measuring thickness device comprises pipe tobacco measuring thickness device A 2 and pipe tobacco measuring thickness device B 3.Pipe tobacco measuring thickness device A 2 links to each other with data acquisition processing system 7 with pipe tobacco measuring thickness device B 3, pipe tobacco measuring thickness device A 2, pipe tobacco measuring thickness device B 3 are arranged on the mounting bracket 1, be positioned at the top of conveying belt 6, direction of motion along conveying belt 6 is installed successively, it is S that the pinch roller 5 of the pinch roller 5 of pipe tobacco measuring thickness device A 2 and pipe tobacco measuring thickness device B 3 is placed on the spacing that (contacts) on the conveying belt 6 between two pinch rollers, and its center line is consistent with the direction of motion of conveying belt 6 and parallel.Shown in Fig. 1 a, Fig. 1 b.
In the tobacco elasticity on-line detection device 100, what pipe tobacco measuring thickness device A 2 and/or pipe tobacco measuring thickness device B 3 adopted is pinch roller formula measuring thickness device, and this pinch roller formula measuring thickness device comprises connecting rod 4, pinch roller 5, bolster 8, displacement transducer 9 and transmitter 10.Wherein, displacement transducer 9 can be angular displacement sensor or linear movement pick-up, and the output signal of displacement transducer 9 is delivered to data acquisition processing system 7 through transmitter 10.Shown in Fig. 2 a.
Shown in Fig. 2 b, be the cellular construction synoptic diagram of data acquisition processing system.Data acquisition processing system 7 comprises: pipe tobacco thickness coefficient amending unit 71, moisture in cut tobacco leveling factor unit 72, pipe tobacco temperature coefficient amending unit 73, the first tobacco elasticity processing unit 74, the second tobacco elasticity processing unit 75, the 3rd tobacco elasticity processing unit 76.
Pipe tobacco thickness coefficient amending unit 71 is used for the pipe tobacco thickness coefficient is revised, and obtains pipe tobacco thickness measuring correction factor K
1 repaiies(H
1);
Moisture in cut tobacco leveling factor unit 72 is used for the moisture in cut tobacco coefficient is revised, and obtains moisture in cut tobacco correction factor K
2 repair(H
2O);
Pipe tobacco temperature coefficient amending unit 73 is used for the pipe tobacco temperature coefficient is revised, and obtains pipe tobacco temperature correction coefficient K
3 repair(T ℃);
The first tobacco elasticity processing unit 74 connects pipe tobacco thickness coefficient amending unit 71, is used for according to the described elasticity number of following tobacco elasticity calculated with mathematical model;
R=K
1 repaiies(H
1) * (H
2-H
1)/H
1* 100% (1)
In the formula: R is the elasticity number (%) of pipe tobacco;
H
1Be first signal, the pipe tobacco thickness (mm) that the first pipe tobacco measuring thickness device is measured;
H
2Be secondary signal, the pipe tobacco thickness (mm) that the second pipe tobacco measuring thickness device is measured;
K
1 repaiies(H
1) be pipe tobacco thickness measuring correction factor, i.e. the used pipe tobacco thickness measuring of timing signal COEFFICIENT K
1(H
1) modified value.
The second tobacco elasticity processing unit 75 connects pipe tobacco thickness amending unit 71, described moisture in cut tobacco leveling factor unit 72, is used for according to the described elasticity number of following tobacco elasticity calculated with mathematical model;
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * (H
2-H
1)/H
1* 100% (2)
In the formula, K
2 repair(H
2O) be the moisture in cut tobacco correction factor, i.e. the used moisture in cut tobacco COEFFICIENT K of timing signal
2(H
2O) modified value.
The 3rd tobacco elasticity processing unit 76 connects pipe tobacco thickness amending unit 71, described moisture in cut tobacco leveling factor unit 72, pipe tobacco temperature coefficient amending unit 73, is used for according to the described elasticity number of following tobacco elasticity calculated with mathematical model;
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * K
3 repair(T ℃) * (H
2-H
1)/H
1* 100% (3)
In the formula, K
3 repair(T ℃) is the pipe tobacco temperature correction coefficient, i.e. the used pipe tobacco temperature coefficient of timing signal K
3The modified value of (T ℃).
In pipe tobacco measuring thickness device A 2, pipe tobacco measuring thickness device B 3, in order to regulate the size that 5 pairs of pipe tobaccos 13 of pinch roller are exerted pressure, also be provided with pressure governor, this pressure governor adopts lever one Weight type pressure governor, shown in Fig. 3 a, Fig. 3 b.For the pressure that alleviates 5 pairs of pipe tobaccos 13 of pinch roller can locate to add weight 11 at A ',, can change the size of exerting pressure by the weight that changes weight 11 for the pressure that increases by 5 pairs of pipe tobaccos 13 of pinch roller can locate to add weight 11 at B '.
In addition, this pressure governor also can adopt other forms of regulator, as the spring pressure regulator, to regulate the size that 5 pairs of pipe tobaccos 13 of pinch roller are exerted pressure.
In the tobacco elasticity on-line detection device 100, also comprise a fixed material pipe 14, be installed in the place ahead of pipe tobacco measuring thickness device A 2, pipe tobacco measuring thickness device B 3, the pipe tobacco feeding port place of conveying belt 6.As shown in Figure 5.
The purpose that fixed material pipe 14 is installed is to stablize the thickness of pipe tobacco 13 on the conveying belt 6, reduces the variation in thickness of pipe tobacco 13.
In the tobacco elasticity on-line detection device 100, the first tobacco elasticity processing unit 74 in the data acquisition processing system 7 calculates according to the elasticity number of following tobacco elasticity mathematical model to pipe tobacco.
R=K
1 repaiies(H
1) * (H
2-H
1)/H
1* 100% (1)
In the formula: R is the elasticity (%) of pipe tobacco;
H
1Pipe tobacco thickness (mm) for pipe tobacco measuring thickness device A 2 measurements;
H
2Pipe tobacco thickness (mm) for pipe tobacco measuring thickness device B 3 measurements;
In the formula, K
1 repaiies(H
1) be pipe tobacco thickness measuring correction factor, i.e. the used pipe tobacco thickness measuring of timing signal COEFFICIENT K
1(H
1) modified value.
K
1 repaiies(H
1) be to determine by materials calibration by the pipe tobacco of the known tobacco elasticity value of pipe tobacco thickness coefficient amending unit 71 usefulness.Work as H
1Changing can be at different H when big
1Demarcate a plurality of K under the situation
1 repaiies(H
1) value, obtain K
1 repaiies(H
1) and H
1Variation relation can be according to H when detecting tobacco elasticity
1Value is according to K
1 repaiies(H
1) and H
1Variation relation is determined K
1 repaiies(H
1) value, thereby can calculate the tobacco elasticity value.
Because the elasticity of pipe tobacco 13 is relevant with the moisture of pipe tobacco 13, when the change of soil water content of pipe tobacco 13 is bigger, then need pipe tobacco 13 is carried out the moisture correction.For this reason in tobacco elasticity on-line detection device 100, also comprise a moisture in cut tobacco measuring instrument 12, this moisture in cut tobacco measuring instrument 12 is installed in the place ahead of pipe tobacco measuring thickness device A2 or the rear of pipe tobacco measuring thickness device B 3, and be located at the center line top of pipe tobacco measuring thickness device A 2 and pipe tobacco measuring thickness device B 3, shown in Fig. 4 a, Fig. 4 b.
At this moment, the second tobacco elasticity processing unit 75 of data acquisition processing system 7 is by the elasticity number of following tobacco elasticity calculated with mathematical model pipe tobacco.
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * (H
2-H
1)/H
1* 100% (2)
In the formula, K
2 repair(H
2O) be the moisture in cut tobacco correction factor, i.e. the used moisture in cut tobacco COEFFICIENT K of timing signal
2(H
2O) modified value.
K
2 repair(H
2O) be by the known elasticity number that contains the different in moisture pipe tobacco of moisture in cut tobacco leveling factor unit 72 usefulness, draw different K by demarcation
2 repair(H
2O) value, thus K obtained
2 repair(H
2O), carry out fitting a straight line with least square method again or carry out the polygometry match and try to achieve K with the change of soil water content of pipe tobacco relation
2 repair(H
2O) and the relational expression between moisture in cut tobacco.During online detection tobacco elasticity, the moisture value and the above-mentioned K that measure according to moisture in cut tobacco measuring instrument 12
2 repair(H
2O) obtain K with the relational expression of moisture in cut tobacco
2 repair(H
2O) value, thus can calculate the tobacco elasticity value.
Because the elasticity of pipe tobacco 13 is relevant with the temperature of pipe tobacco 13, when the temperature variation of pipe tobacco 13 is bigger, then need pipe tobacco 13 is carried out the temperature correction.For this reason in tobacco elasticity on-line detection device 100, also comprise a pipe tobacco temperature measuring set, this pipe tobacco temperature measuring set is installed in the place ahead of pipe tobacco measuring thickness device A 2 or the rear of pipe tobacco measuring thickness device B 3, and is positioned at the center line top of pipe tobacco measuring thickness device A 2 and pipe tobacco measuring thickness device B3.
At this moment, the 3rd tobacco elasticity processing unit 76 of data acquisition processing system 7 is by the elasticity number of following tobacco elasticity calculated with mathematical model pipe tobacco.
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * K
3 repair(T ℃) * (H
2-H
1)/H
1* 100% (3)
In the formula, K
3 repair(T ℃) is the pipe tobacco temperature correction coefficient, i.e. the used pipe tobacco temperature coefficient of timing signal K
3The modified value of (T ℃).
K
3 repair(T ℃) is by the elasticity number of the known different temperatures pipe tobacco of pipe tobacco temperature coefficient amending unit 73 usefulness, draws different K by demarcation
3 repair(T ℃) value, thus K obtained
3 repairThe temperature variation relation of (T ℃) and pipe tobacco is carried out fitting a straight line with least square method again or is carried out the polygometry match and try to achieve K
3 repairWhen the relational expression between (T ℃) and pipe tobacco temperature, online detection tobacco elasticity, according to pipe tobacco temperature measuring set temperature value measured and above-mentioned K
3 repair(T ℃) obtains K with the relational expression of pipe tobacco temperature
3 repair(T ℃) value, thus can calculate the tobacco elasticity value.
Should point out at this, in actual detected, select whether to carry out above-mentioned moisture in cut tobacco correction, the correction of pipe tobacco temperature according to the operating mode situation of pipe tobacco.
In order to improve measuring accuracy, correct measurement goes out the pipe tobacco elasticity number, must resolve two problems:
1, the duty of tobacco elasticity on-line detection device 100 should be tried one's best near the duty of static tobacco elasticity pick-up unit, to satisfy the tobacco elasticity measurement requirement.
Static pipe tobacco is measured the working condition of elastomeric check device: the sampling receptacle internal diameter is 95mm, highly for 240mm, gauge head pressure are 7.4kg, the speed of exerting pressure is (30 ± 3) mm/s, the time of exerting pressure is that 7s, interval time are 10s.
Measuring process: get the 70g sample and put into sampling receptacle, apply 7.4kg pressure, the 7s that exerts pressure record height of specimen H
1, the pipe tobacco height H of record sample behind the release of pressure 10s
2, the computing formula of tobacco elasticity R is as follows:
R=(H
2-H
1)/H
1*100%
In the formula: R is the elasticity (%) of pipe tobacco;
H
1Be the back pipe tobacco thickness (mm) of exerting pressure;
H
2Be pipe tobacco thickness (mm) behind the release of pressure.
During design tobacco elasticity on-line detection device 100, select suitable pinch roller parameter, mounting distance and belt speed, the working condition when making it near static measurement.
2, set up the mathematical model of tobacco elasticity on-line measurement.
Now as follows to the problems referred to above division:
The duty of A, tobacco elasticity on-line detection device 100 and pinch roller parameter are selected
The duty of supposing tobacco elasticity on-line detection device 100 as shown in Figure 5.
Pinch roller A parameter is: diameter=d
A, width=D
A, weight=W
A
Pinch roller B parameter is: diameter=d
B, width=D
B, weight=W
B
A) the pinch roller parameter is selected:
A1) diameter d of pinch roller A
A
The diameter d of pinch roller A
ABe greater than the thickness of tested pipe tobacco, otherwise pinch roller A will be buried by pipe tobacco;
Weight>7.9kg of pinch roller A.
A2) width D of pinch roller A
A
The pinch roller width D
ADiameter=the 95mm of≤static tobacco elasticity pick-up unit container.
A3) weight W of pinch roller A
A
The material density of supposing pinch roller A is ρ;
The weight W of pinch roller A
A=π (d
A/ 2)
2* D
A* ρ.
A4) parameter of pinch roller B is selected identical with pinch roller A
The pressure of pinch roller A, B requires to regulate by pressure governor to be determined.
B) duty is determined:
B1) selection of belt speed V
The diameter d of pinch roller A
ADefinite, belt speed is selected to satisfy the rate request of exerting pressure, and static test has provided the speed V that exerts pressure
PressThe speed of the exerting pressure V that=(30 ± 3) mm/s belt speed V and pinch roller give
Press(circumference exert pressure speed) has following relation:
V=(pi/2) * V
Press
Belt speed V=(pi/2) * V
Press=47.1mm/s
B2) pinch roller A and pinch roller B between apart from S
S selects to satisfy release of pressure time requirement:
∵ S/V=release of pressure time=10s
∴S=10s*V=10*47.1=471mm。
In order to satisfy the time 7s requirement of exerting pressure, can add pre-pinch roller 15 in the place ahead of pinch roller A or add and keep pressure pinch roller 16, shown in Fig. 6 a, Fig. 6 b at the rear of pinch roller A.
The mathematical model of B, tobacco elasticity on-line measurement
Because tobacco elasticity is relevant with pipe tobacco water cut, pipe tobacco temperature and flow of tobacco, set the correction factor method so adopt, set up following tobacco elasticity mathematical model:
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * K
3 repair(T ℃) * (H
2-H
1)/H
1* 100% (3)
In the formula: R is tobacco elasticity (%);
K
1 repaiies(H
1) be pipe tobacco thickness correction factor;
K
2 repair(H
2O) be the moisture in cut tobacco correction factor;
K
3 repair(T ℃) is the pipe tobacco temperature correction coefficient;
H
1Pipe tobacco thickness (mm) for pipe tobacco measuring thickness device A 2 measurements;
H
2Pipe tobacco thickness (mm) for pipe tobacco measuring thickness device B 3 measurements;
Formula (1) if in the moisture variation of pipe tobacco little, K then
2 repair(H
2O)=1.
Formula (1) if in the pipe tobacco temperature variation little, K then
3 repair(T ℃)=1.
Work as K
2 repair(H
2O)=1, K
3 repair(T ℃)=1 o'clock, moisture in cut tobacco, pipe tobacco temperature are not revised.Adopt said method, can solve the tobacco elasticity problem on line detection preferably.
Further technical scheme of the present invention is described below by specific embodiment.
1, mathematical model
In first embodiment, when setting up mathematical model, suppose that moisture in cut tobacco and pipe tobacco temperature variation are little, then need not carry out moisture in cut tobacco, the correction of pipe tobacco temperature, i.e. K
2 repair(H
2O)=1, K
3 repair(T ℃)=1.At this moment, the mathematical model of employing is:
R=K
1 repaiies(H
1) * (H
2-H
1)/H
1* 100% (1)
2, the parameter of duty and pipe tobacco measuring thickness device is determined
A) working status parameter
Belt speed V=47.1Vmm/s;
Between pipe tobacco measuring thickness device A 2, pipe tobacco measuring thickness device B 3 apart from S=471mm.
B) pipe tobacco measuring thickness device parameter
B1) parameter of pinch roller A
Width D
A≤ 95mm selects D
A=90mm;
Diameter d
A〉=test pipe tobacco thickness;
Suppose test pipe tobacco thickness=150mm
Selected pinch roller diameter=250mm
Weight W
A, suppose that the pinch roller material is an edible plastic
Its material density=2.0g/cm
3
W then
A=π (25/2)
2* 9*2.0g/cm
3
=3.14*156.25*9*2
=8.831kg
Weight 8.831kg>7.4kg meets the demands.
B2) parameter of pinch roller B
The parameter of pinch roller B is identical with the parameter of pinch roller A;
B3) displacement transducer
Select FB-900C type angular displacement sensor for use, resolution=0.01 degree.
B4) transmitter 10 adopts the high reliability microprocessor to make, and the conversion precision is 16.
3, data acquisition processing system is selected
Data acquisition processing system 7 selects Siemens PLC C to make, and CPU adopts 300 types and has the tobacco elasticity leveling factor unit and the tobacco elasticity data processing unit.
4, K
1 repaiies(H
1) determine
Adopt known tobacco elasticity to demarcate and determine K
1 repaiies(H
1):
Suppose K
1(H
1)=1, conveying belt 6 feeding tobacco-threads 13 are by tobacco elasticity on-line detection device 100, and data acquisition processing system 7 is gathered the signal H of pipe tobacco measuring thickness device A 2
AiSignal H with pipe tobacco measuring thickness device B 3
BiIf collection period is 1 second, according to following tobacco elasticity mathematical model:
R=K
1(H
1)*(H
Bi-H
Ai)/H
Ai*100%
Calculate the tobacco elasticity value of per second, the pipe tobacco grab sample that pinch roller 5 was pressed meanwhile supposes that it is R that measurement time t=60 second, data acquisition processing system 7 provide the tobacco elasticity mean value of measuring in 60 seconds
Survey=3.8%, the pipe tobacco of sampling records elasticity R through static pipe tobacco measuring instrument
0=3.9%, K then
1(H
1) modified value is:
K
1 repaiies(H
1)=(R
0/ R
Survey) * K
1(H
1)=(3.9%/3.8%) * 1=1.026
The elasticity mathematical model of final definite pipe tobacco is:
R
i=1.026*(H
2i-H
1i)/H
1i*100%
During online detection, tobacco elasticity on-line detection device 100 is by above-mentioned calculated with mathematical model tobacco elasticity value.
Further describe the application's technical scheme below again by second embodiment, in this second embodiment, described the tobacco elasticity on-line detection device that has the moisture correction.
Moisture in cut tobacco measuring instrument 12 is selected the infrared moisture measuring instrument, is installed in the place ahead of measuring thickness device A 2.
1) the tobacco elasticity mathematical model of Cai Yonging is:
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * (H
2-H
1)/H
1* 100% (2)
K
1(H
1) definite K in first embodiment
1 repaiies(H
1K is supposed to demarcate in)=1.026
1(H
1) time pipe tobacco moisture value=11.5%, this moment K
2 repair(H
2O)=1.
As previously mentioned, adopt the different moisture content pipe tobacco to demarcate and can get following data, see Table 1 by tobacco elasticity on-line detection device 100:
Table 1
Sequence number |
The used K of timing signal
2(H
2O) value
|
Timing signal moisture in cut tobacco value |
On-line measuring device is measured the tobacco elasticity value |
Static detection device is measured the tobacco elasticity value |
Revise back moisture in cut tobacco correction factor K
2 repair(H
2O)
|
1 |
1 |
11.5% |
3.9% |
3.9% |
1 |
2 |
1 |
12% |
3.80% |
3.85% |
1.013 |
3 |
1.013 |
12.5% |
3.92% |
4.01% |
1.036 |
4 |
1.036 |
13% |
3.85% |
3.91% |
1.052 |
5 |
1.052 |
13.5% |
3.79% |
3.88% |
1.076 |
6 |
1.076 |
14% |
3.81% |
3.96% |
1.118 |
Find out moisture in cut tobacco and K according to nominal data
2 repair(H
2O) relation between is with K
2 repair(H
2O) be that horizontal ordinate gets K for ordinate with the moisture in cut tobacco value
2 repair(H
2O) with the moisture in cut tobacco change curve, as shown in Figure 8.
According to K
2 repair(H
2O) with a of moisture in cut tobacco change curve, b, c, d, e, each point coordinate of f carries out curve fitting:
(a) carry out slope=K that fitting a straight line can be obtained fitting a straight line with least square method
0, intercept=b tries to achieve K
2 repair(H
2O) expression formula:
K
2 repair(H
2O)=K
0* (moisture value)
i+ b (4)
According to the moisture in cut tobacco value that infrared moisture measuring instrument 12 records, the substitution formula is tried to achieve K in (4)
2 repair(H
2O) value is with K
2 repair(H
2O) substitution has the elasticity mathematical model (formula (2)) of moisture in cut tobacco correction to calculate the elasticity number of pipe tobacco again.
(b) can adopt polygometry to carry out match:
Connect a-b, b-c, c-d, d-e, e-f obtain a plurality of broken lines.
The a-b section
Slope K
1=(1.013-1)/(12%-11.5%)
Moisture is less than 12% o'clock, K
2 repair(H
2O) expression formula is:
K
2 repair(H
2O)=K
1* (record moisture value-11.5%)+1 (5)
The b-c section
Slope K
2=(1.036-1.013)/(12.5%-12%)
Moisture is less than 12.5% o'clock, K
2 repair(H
2O) expression formula is:
K
2 repair(H
2O)=K
2* (record moisture value-12%)+1.013 (6)
The c-d section
Slope K
3=(1.052-1.036)/(13%-12.5%)
Moisture is less than 13% o'clock, K
2 repair(H
2O) expression formula is:
K
2 repair(H
2O)=K
3* (record moisture value-12.5%)+1.036 (7)
The d-e section
Slope K
4=(1.076-1.052)/(13.5%-13%)
Moisture is less than 13.5% o'clock, K
2 repair(H
2O) expression formula is:
K
2 repair(H
2O)=K
4* (record moisture value-13%)+1.052 (8)
The e-f section
Slope K
5=(1.118-1.076)/(14%-13.5%)
Moisture is greater than 13.5% o'clock, K
2 repair(H
2O) expression formula is:
K
2 repair(H
2O)=K
5* (record moisture value-13.5%)+1.076 (9)
To sum up, K
2 repair(H
2O) moisture correction process flow diagram as shown in Figure 7.
According to the moisture value that moisture in cut tobacco measuring instrument 12 is measured, press K
2 repair(H
2O) moisture correction process flow diagram is determined K
2 repair(H
2O) be worth, calculate the elasticity number of pipe tobacco again according to elasticity mathematical model formula (2).
As shown in Figure 9, be the online testing process figure of tobacco elasticity of the present invention.In conjunction with Fig. 1-shown in Figure 8, this flow process specifically comprises the steps:
Step S901, the pipe tobacco of carrying by pipe tobacco measuring thickness device A 2,3 pairs of conveying belt of pipe tobacco measuring thickness device B 6 13 carries out thickness measure;
Step S902 gathers the signal H that pipe tobacco measuring thickness device A 2 measures by data acquisition processing system 7
1The signal H that measures with pipe tobacco measuring thickness device B 3
2
Step S903, data acquisition processing system 7 calculates according to the elasticity number of tobacco elasticity mathematical model to pipe tobacco 13.
Further, among the step S903, the first tobacco elasticity processing unit 74 of data acquisition processing system 7 calculates according to the elasticity number of tobacco elasticity mathematical model to pipe tobacco.
R=K
1 repaiies(H
1) * (H
2-H
1)/H
1* 100% (1)
In the formula: R is the elasticity (%) of pipe tobacco;
H
1Pipe tobacco thickness (mm) for pipe tobacco measuring thickness device A 2 measurements;
H
2Pipe tobacco thickness (mm) for pipe tobacco measuring thickness device B 3 measurements;
K
1 repaiies(H
1) be pipe tobacco thickness measuring correction factor, i.e. the used pipe tobacco thickness measuring of timing signal COEFFICIENT K
1(H
1) modified value.
Wherein, K
1 repaiies(H
1) be to determine by materials calibration by the pipe tobacco of the known tobacco elasticity value of pipe tobacco thickness coefficient amending unit 71 usefulness.Work as H
1Changing can be at different H when big
1Demarcate a plurality of K under the situation
1 repaiies(H
1) value, obtain K
1 repaiies(H
1) and H
1Variation relation can be according to H when detecting tobacco elasticity
1Value is according to K
1 repaiies(H
1) and H
1Variation relation is determined K
1 repaiies(H
1) value, thereby can calculate the tobacco elasticity value.
Because the elasticity of pipe tobacco 13 is relevant with the moisture of pipe tobacco 13, when the change of soil water content of pipe tobacco 13 is bigger, then need pipe tobacco 13 is carried out the moisture correction.For this reason in tobacco elasticity on-line detection device 100, also comprise a moisture in cut tobacco measuring instrument 12, this moisture in cut tobacco measuring instrument 12 is installed in the place ahead of pipe tobacco measuring thickness device A2 or the rear of pipe tobacco measuring thickness device B 3, and is positioned at the center line top of pipe tobacco measuring thickness device A 2 and pipe tobacco measuring thickness device B 3.At this moment, the second tobacco elasticity processing unit 75 of data acquisition processing system 7 is by the elasticity number of following tobacco elasticity calculated with mathematical model pipe tobacco.
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * (H
2-H
1)/H
1* 100% (2)
In the formula, K
2 repair(H
2O) be the moisture in cut tobacco correction factor, i.e. the used moisture in cut tobacco COEFFICIENT K of timing signal
2(H
2O) modified value.
K
2 repair(H
2O) be by the known elasticity number that contains the different in moisture pipe tobacco of moisture in cut tobacco leveling factor unit 72 usefulness, draw different K by demarcation
2 repair(H
2O) value, thus K obtained
2 repair(H
2O), carry out fitting a straight line with least square method again or carry out the polygometry match and try to achieve K with the change of soil water content of pipe tobacco relation
2 repair(H
2O) and the relational expression between moisture in cut tobacco.During online detection tobacco elasticity, the moisture value and the above-mentioned K that measure according to moisture in cut tobacco measuring instrument 12
2 repair(H
2O) obtain K with the relational expression of moisture in cut tobacco
2 repair(H
2O) value, thus can calculate the tobacco elasticity value.
Because the elasticity of pipe tobacco 13 is relevant with the temperature of pipe tobacco 13, when the temperature variation of pipe tobacco 13 is bigger, then need pipe tobacco 13 is carried out the temperature correction.For this reason in tobacco elasticity on-line detection device 100, also comprise a pipe tobacco temperature measuring set, this pipe tobacco temperature measuring set is installed in the place ahead of pipe tobacco measuring thickness device A 2 or the rear of pipe tobacco measuring thickness device B 3, and is positioned at the center line top of pipe tobacco measuring thickness device A 2 and pipe tobacco measuring thickness device B3.At this moment, the 3rd tobacco elasticity processing unit 76 of data acquisition processing system 7 is by the elasticity number of following tobacco elasticity calculated with mathematical model pipe tobacco.
R=K
1 repaiies(H
1) * K
2 repair(H
2O) * K
3 repair(T ℃) * (H
2-H
1)/H
1* 100% (3)
In the formula, K
3 repair(T ℃) is the pipe tobacco temperature correction coefficient, i.e. the used pipe tobacco temperature coefficient of timing signal K
3The modified value of (T ℃).
K
3 repair(T ℃) is by the elasticity number of the known different temperatures pipe tobacco of pipe tobacco temperature coefficient amending unit 73 usefulness, draws different K by demarcation
3 repair(T ℃) value, thus K obtained
3 repairThe temperature variation relation of (T ℃) and pipe tobacco is carried out fitting a straight line with least square method again or is carried out the polygometry match and try to achieve K
3 repairWhen the relational expression between (T ℃) and pipe tobacco temperature, online detection tobacco elasticity, according to pipe tobacco temperature measuring set temperature value measured and above-mentioned K
3 repair(T ℃) obtains K with the relational expression of pipe tobacco temperature
3 repair(T ℃) value, thus can calculate the tobacco elasticity value.
Certainly the present invention can also have various embodiments, as the pipe tobacco temperature measuring set is installed, and demarcates different pipe tobacco temperature K with the tobacco elasticity value of different temperatures
3 repair(T ℃) value is tried to achieve its variation relation, during online detection, according to the pipe tobacco temperature value of measuring, obtains K
3 repair(T ℃) value, according to tobacco elasticity calculated with mathematical model tobacco elasticity value, its way is identical with second embodiment again.Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.