CN108225522A - A kind of logistics dynamic weigher and its weighing method - Google Patents
A kind of logistics dynamic weigher and its weighing method Download PDFInfo
- Publication number
- CN108225522A CN108225522A CN201810119911.4A CN201810119911A CN108225522A CN 108225522 A CN108225522 A CN 108225522A CN 201810119911 A CN201810119911 A CN 201810119911A CN 108225522 A CN108225522 A CN 108225522A
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- China
- Prior art keywords
- controller
- amplifier
- signal amplifier
- pressure sensor
- support plate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/002—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for postal parcels and letters
- G01G19/005—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for postal parcels and letters with electric or electronic computing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/62—Over or under weighing apparatus
Abstract
The present invention relates to a kind of logistics dynamic weigher and its weighing methods, including conveyer, support plate, it is vertically directed mechanism, pressure sensor, pedestal, dead weight removal module, signal amplifier, data collector and controller, the conveyer is set in support plate, the support plate is erected at by being vertically directed mechanism on pedestal, the pressure sensor is set on pedestal, and floating support is in the bottom center position of support plate, pressure sensor, dead weight removal module, signal amplifier, data collector and controller are sequentially connected, the controller is also connected with the parameter regulation end of signal amplifier.Compared with prior art, the present invention improves measurement accuracy, especially reduces the measurement error of light-duty package by the signal amplifier of single-sensor structure, dead weight removal module and dynamic regulation amplification factor.
Description
Technical field
The present invention relates to logistics detection field, more particularly, to a kind of logistics dynamic weigher and its weighing method.
Background technology
The weight of package, is the important evidence that logistic industry carries out charge clearing, and each site and Distribution Center are required for pair
Package is weighed, and traditional artificial weighting manner uses platform balance and hand-held scanner rifle, needs two people cooperation or frequent taking and placing
Scanner and package, labor intensity is big, and working efficiency is low, can not meet the needs of logistic industry fast development.
Currently, domestic also to have many online weighing equipments to occur, these equipments are commonly used in below conveying mechanism and install
The mode of weighing device.Wherein, weighing device has plenty of multiple weighing sensors combinations and weighs, such as number of patent application
" 201710215621.5 ", entitled " a kind of dynamic weighing instrument ", number of patent application " 201520933345.2 " are entitled " to examine at a high speed
Weight scale ", number of patent application " 201520932204.9 ", three patents of entitled " belt conveyor for being used for check weighing scale "；Have
Be static electronic scale, such as number of patent application " 201710061494.8 ", a kind of entitled " dynamic weighing, barcode scanning device " and patent
Application number " 201620271007.1 ", two patents of entitled " logistics sorting weighing device ".
The mode combined using multiple weighing sensors, there are following points：
1st, it since conveying mechanism weight is bigger, needs to select the weighing device of larger range；
2nd, article in weighing process is mobile, uncertain, weighing sensor installation error of article placement location, can all cause
The unbalance stress of weighing sensor, it is desirable that each weighing sensor has larger range；
Problem above makes total range of weighing device, and much larger than Item Weight, and within range ability, weighing device has phase
Same absolute precision, the relative accuracy that this has resulted in article is low, when especially measuring lighter items.
Static electronic scale generally uses the structure of multisensor, similary to have above deficiency.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of logistics dynamic weighings
Device and its weighing method remove the signal amplifier of module and dynamic regulation amplification factor by single-sensor structure, dead weight,
Measurement accuracy is improved, especially reduces the measurement error of light-duty package.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of logistics dynamic weigher including conveyer, support plate, is vertically directed mechanism, pressure sensor, pedestal, dead weight
Module, signal amplifier, data collector and controller are removed, the conveyer is set in support plate, and the support plate passes through
It is vertically directed mechanism to be erected on pedestal, the pressure sensor is set on pedestal, and floating support is in the bottom surface of support plate
Center, pressure sensor, dead weight removal module, signal amplifier, data collector and controller are sequentially connected, the control
Device processed is also connected with the parameter regulation end of signal amplifier；
The minimum amplification factor A of controller initial setting up signal amplifier1With the corresponding range M that weighsmax, pressure sensor adopts
The signal of collection is successively by pressure sensor, dead weight removal module, signal amplifier and data collector input controller, control
The Item Weight M that device acquisition measures for the first time1, and further obtain the corresponding amplification factor A of optimal precisionn, An=2MmaxA1/3M1,
The amplification factor of signal amplifier is adjusted to AnAfter carry out double measurement, the Item Weight of double measurement is as knot of finally weighing
Fruit.
The mechanism that is vertically directed includes the linear guide, guide supporting seat and linear bearing, and the linear guide is set vertically
It puts, the top of the linear guide is connected by the bottom surface of guide supporting seat and support plate, and the bottom end of the linear guide passes through linear bearing
On pedestal.
The mechanism that is vertically directed is multiple, and multiple mechanisms that are vertically directed are uniformly arranged along the edge of support plate.
The dead weight removal module includes instrument amplifier and voltage regulation unit, and the output terminal of the pressure sensor connects
Connect the input terminal of instrument amplifier, the input terminal of the output terminal connection signal amplifier of the instrument amplifier, instrument amplifier
Reference voltage end connection voltage regulation unit, utilize the reference voltage of voltage regulation unit regulation meter amplifier so that defeated
The output signal of instrument amplifier is zero when sending machine non-loaded.
The voltage regulation unit includes operational amplifier, first resistor and second resistance, one end of the first resistor
Ground connection, the other end of first resistor connect one end of second resistance and the positive input terminal of operational amplifier, second electricity respectively
The voltage adjustable side of the other end connection controller of resistance, the negative input end of the operational amplifier connect operational amplifier respectively
The reference voltage end of output terminal and instrument amplifier.
The inlet and exit of the conveyer are respectively equipped with an optoelectronic switch, and the optoelectronic switch connects controller.
The controller is connect respectively with remote data base, man-machine interface display and scanner.
A kind of weighing method of above-mentioned logistics dynamic weigher, includes the following steps：
1）The minimum amplification factor A of initial setting up signal amplifier1With the corresponding range M that weighsmax；
2）Start to measure after detecting article completely into conveyer, terminate to measure when article initially moves off conveyer,
During measurement, the signal of pressure sensor acquisition is adopted successively by pressure sensor, dead weight removal module, signal amplifier and data
Storage input controller, the Item Weight M that controller acquisition measures for the first time1, and further obtain the corresponding amplification of optimal precision
Multiple An, An=2MmaxA1/3M1, the amplification factor of signal amplifier is adjusted to AnAfter carry out double measurement, the article of double measurement
Weight is as final weighing results.
The step 1）Calibration steps is carried out before, and the calibration steps includes but not limited to return to zero and nonlinear compensation.
Compared with prior art, the present invention has the following advantages：
1st, by the signal amplifier of single-sensor structure, dead weight removal module and dynamic regulation amplification factor, measurement is improved
Precision, especially reduces the measurement error of light-duty package, and have the advantages that working efficiency it is high, using it is simple, be advantageously integrated.
2nd, the corresponding amplification factor of optimal precision, the double measurement based on the corresponding amplification factor of optimal precision are rationally designed
As a result as final weighing results, ensure the accuracy of weighing data.
3rd, it is vertically directed mechanism and limits moving horizontally and overturning for conveyer, conveyer is made only to be transmitted to pressure sensor
Gravity.
4th, it is simple in structure, low manufacture cost, use easy to spread.
Description of the drawings
Fig. 1 is the system construction drawing of the present invention
Fig. 2 is the schematic diagram of measuring circuit in the present invention
Fig. 3 is the structure diagram that mechanism is vertically directed in the present invention.
In figure：1st, conveyer, 2, support plate, 3, pressure sensor, 4, pedestal, 5, dead weight removal module, 51, instrument amplification
Device, 52, operational amplifier, 6, signal amplifier, 7, data collector, 8, controller, 9, be vertically directed mechanism, 91, straight line leads
Rail, 92, guide supporting seat, 93, linear bearing, 10, optoelectronic switch, 11, multi-functional I/O module.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
As shown in Figure 1, a kind of logistics dynamic weigher, including conveyer 1, support plate 2, is vertically directed mechanism 9, pressure
Sensor 3, pedestal 4, dead weight removal module 5, signal amplifier 6, data collector 7 and controller 8, conveyer 1 are set on support
On plate 2, support plate 2 is erected at by being vertically directed mechanism 9 on pedestal 4, and pressure sensor 3 is set on pedestal 4, and branch of floating
It supports in the bottom center position of support plate 2, pressure sensor 3, dead weight removal module 5, signal amplifier 6,7 and of data collector
Controller 8 is sequentially connected, and controller 8 is also connected with the parameter regulation end of the adjustable amplification factor of signal amplifier 6.
The minimum amplification factor A of 8 initial setting up signal amplifier 6 of controller1With the corresponding range M that weighsmax, article exists
It is moved on conveyer 1, in weight transfer to pressure sensor 3, dead weight removal module 5 removes oneself in 3 signal of pressure sensor
After 6 amplified signal of signal amplifier, input control after digital signal is converted analog signals by data collector 7 for weight ingredient
Device 8, controller 8 obtain the Item Weight M measured for the first time1, and further obtain the corresponding amplification factor A of optimal precisionn, An=
2MmaxA1/3M1, the amplification factor of signal amplifier 6 is adjusted to AnAfter carry out double measurement, the Item Weight conduct of double measurement
Final weighing results.
It is multiple to be vertically directed mechanism 9, and multiple mechanisms 9 that are vertically directed are uniformly arranged along the edge of support plate 2, the present embodiment
In, four are vertically directed the four corners that mechanism 9 is separately mounted to corresponding conveyer 1, as shown in figure 3, being each vertically directed mechanism 9
Include the linear guide 91, guide supporting seat 92 and linear bearing 93, the linear guide 91 is vertically arranged, the top of the linear guide 91
It is fixedly connected by guide supporting seat 92 with the bottom surface of support plate 2, the bottom end of the linear guide 91 is set on base by linear bearing 93
On seat 4, connection is rolled between the linear guide 91 and linear bearing 93, mechanism 9 is vertically directed and limits moving horizontally for conveyer 1
With overturning, conveyer 1 is made only to transmit gravity to pressure sensor 3.
As shown in Fig. 2, dead weight removal module 5 include instrument amplifier 51 and voltage regulation unit, pressure sensor 3 it is defeated
Outlet connects the input terminal of instrument amplifier 51, the input terminal of the output terminal connection signal amplifier 6 of instrument amplifier 51, instrument
Amplifier 51 reference voltage end connection voltage regulation unit, the voltage of voltage regulation unit can be set by controller 8 or
It manually sets, utilizes the reference voltage of voltage regulation unit regulation meter amplifier 51 so that instrument is put when conveyer 1 is non-loaded
The output signal of big device 51 is zero.
In the present embodiment, as shown in Fig. 2, voltage regulation unit includes operational amplifier 52, the electricity of first resistor R1 and second
R2 is hindered, one end ground connection of first resistor R1, the other end of first resistor R1 connects one end of second resistance R2 respectively and operation is put
The positive input terminal of big device 52, the voltage adjustable side of the other end connection controller 8 of second resistance R2, bearing for operational amplifier 52 are defeated
Enter the end reference voltage end of the output terminal of connection operational amplifier 52 and instrument amplifier 51 respectively.
As shown in Fig. 2, in the present embodiment, signal amplifier 6 is digital instrument amplifier 51, and dead weight removes 5 He of module
The realization of AD8231 chips can be used in signal amplifier 6.Controller 8 is industrial computer, and passes through the more of model USB-6002
Instrument amplifier 51, signal amplifier 6 and voltage regulation unit of the function I/O module 11 respectively with dead weight removal module 5 are connect,
Multi-functional I/O module 11 includes analog signal output module (DAC), data collector 7 (ADC) and Digital I/O output module, control
Device 8 controls the amplification factor of signal amplifier 6, the AI 0 of data collector 7 by the P1.4-P1.7 ends of Digital I/O output module
The analog signal of pressure for exporting signal amplifier 6 is held to be converted to digital signal and be transmitted to controller 8, controller 8 is also logical
0 ends of AO for crossing analog signal output module adjust the voltage at R2 ends, and then the electricity of the reference voltage end of regulation meter amplifier 51
Pressure, the instrument amplifier 51 that controller 8 also presets dead weight removal module 5 by the P1.0-P1.3 ends of Digital I/O output module are put
Big multiple.
The inlet and exit of conveyer 1 are respectively equipped with an optoelectronic switch 10, and optoelectronic switch 10 connects controller 8, profit
Judge that article enters and leaves the state of conveyer 1 with optoelectronic switch 10.
Controller 8 is connect respectively with remote data base, man-machine interface display and scanner etc., is realized communication, is facilitated reality
Existing function integrates.
A kind of weighing method of above-mentioned logistics dynamic weigher includes the following steps：
1）The minimum amplification factor A of initial setting up signal amplifier 61With the corresponding range M that weighsmax；
2）Optoelectronic switch 10 in real time detect, start to measure after detecting article completely into conveyer 1, until article start from
Terminate to measure when opening conveyer 1, during measurement, the signal that pressure sensor 3 acquires is successively by pressure sensor 3, dead weight removal
7 input controller 8 of module 5, signal amplifier 6 and data collector, controller 8 obtain the Item Weight M measured for the first time1, and
Further obtain optimal precision（That is maximal accuracy）Corresponding amplification factor An, An=2MmaxA1/3M1, by putting for signal amplifier 6
Big multiple is adjusted to AnAfter carry out double measurement, the Item Weight that double measurement regains is as final weighing results.
When conveyer 1 is non-loaded, the amplification factor of signal amplifier 6 is turned up in controller 8, is measured with high-amplification-factor empty
Loading capacity records null offset, returns to zero to device into Mobile state.
By above scheme, the present invention provides a kind of logistics dynamic weighers, are gone by single-sensor structure, dead weight
Except module 5 and the signal amplifier 6 of dynamic regulation amplification factor, measurement accuracy is improved, especially reduces the survey of light-duty package
Error is measured, and high with working efficiency, using simple, the advantages of being advantageously integrated.
Claims (9)
1. a kind of logistics dynamic weigher, which is characterized in that including conveyer, support plate, be vertically directed mechanism, pressure sensing
Device, pedestal, dead weight removal module, signal amplifier, data collector and controller, the conveyer are set in support plate, institute
State support plate and be erected on pedestal by being vertically directed mechanism, the pressure sensor is set on pedestal, and floating support in
The bottom center position of support plate, pressure sensor, dead weight removal module, signal amplifier, data collector and controller according to
Secondary connection, the controller are also connected with the parameter regulation end of signal amplifier；
The minimum amplification factor A of controller initial setting up signal amplifier1With the corresponding range M that weighsmax, pressure sensor acquisition
Signal successively by pressure sensor, dead weight removal module, signal amplifier and data collector input controller, controller
Obtain the Item Weight M measured for the first time1, and further obtain the corresponding amplification factor A of optimal precisionn, An=2MmaxA1/3M1, will
The amplification factor of signal amplifier is adjusted to AnAfter carry out double measurement, the Item Weight of double measurement is as final weighing results.
2. a kind of logistics dynamic weigher according to claim 1, which is characterized in that the mechanism that is vertically directed includes
The linear guide, guide supporting seat and linear bearing, the linear guide are vertically arranged, and the top of the linear guide passes through guide supporting
Seat is connect with the bottom surface of support plate, and the bottom end of the linear guide is set on by linear bearing on pedestal.
3. a kind of logistics dynamic weigher according to claim 1, which is characterized in that the mechanism that is vertically directed is more
A, multiple mechanisms that are vertically directed are uniformly arranged along the edge of support plate.
4. a kind of logistics dynamic weigher according to claim 1, which is characterized in that the dead weight removal module includes
Instrument amplifier and voltage regulation unit, the input terminal of the output terminal connection instrument amplifier of the pressure sensor, the instrument
The input terminal of the output terminal connection signal amplifier of table amplifier, the reference voltage end connection voltage of instrument amplifier adjust list
Member utilizes the reference voltage of voltage regulation unit regulation meter amplifier so that instrument amplifier is defeated when conveyer is non-loaded
It is zero to go out signal.
5. a kind of logistics dynamic weigher according to claim 4, which is characterized in that the voltage regulation unit includes
Operational amplifier, first resistor and second resistance, one end ground connection of the first resistor, the other end of first resistor connect respectively
One end of second resistance and the positive input terminal of operational amplifier, the voltage of the other end connection controller of the second resistance are adjusted
End, the negative input end of the operational amplifier connect the output terminal of operational amplifier and the reference voltage of instrument amplifier respectively
End.
6. a kind of logistics dynamic weigher according to claim 1, which is characterized in that the inlet of the conveyer and
Exit is respectively equipped with an optoelectronic switch, and the optoelectronic switch connects controller.
7. a kind of logistics dynamic weigher according to claim 1, which is characterized in that the controller respectively with remotely
Database, man-machine interface display are connected with scanner.
8. a kind of a kind of weighing method of logistics dynamic weigher according to claim 1, which is characterized in that including with
Lower step：
1）The minimum amplification factor A of initial setting up signal amplifier1With the corresponding range M that weighsmax；
2）Start to measure after detecting article completely into conveyer, terminate to measure when article initially moves off conveyer,
During measurement, the signal of pressure sensor acquisition is adopted successively by pressure sensor, dead weight removal module, signal amplifier and data
Storage input controller, the Item Weight M that controller acquisition measures for the first time1, and further obtain the corresponding amplification of optimal precision
Multiple An, An=2MmaxA1/3M1, the amplification factor of signal amplifier is adjusted to AnAfter carry out double measurement, the article of double measurement
Weight is as final weighing results.
A kind of 9. weighing method of logistics dynamic weigher according to claim 8, which is characterized in that the step 1）
Calibration steps is carried out before, and the calibration steps includes but not limited to return to zero and nonlinear compensation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810119911.4A CN108225522A (en) | 2018-02-07 | 2018-02-07 | A kind of logistics dynamic weigher and its weighing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810119911.4A CN108225522A (en) | 2018-02-07 | 2018-02-07 | A kind of logistics dynamic weigher and its weighing method |
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| CN108225522A true CN108225522A (en) | 2018-06-29 |
Family
ID=62670874
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| CN201810119911.4A Pending CN108225522A (en) | 2018-02-07 | 2018-02-07 | A kind of logistics dynamic weigher and its weighing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926573A (en) * | 2018-09-19 | 2020-03-27 | 深圳龙澄高科技环保股份有限公司 | Dynamic weighing system |
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