The arm belt scale is realized the system of the physical goods inspection accuracy of measuring automatically
Technical field
The utility model relates to the system that carries out automatic physical goods inspection to being installed in the belt conveyer scale that becomes on the loose shape material reclaimer arm belt conveying in the inclination angle frame, belongs to the conveying and metering technical field.
Background technology
Loose shape material reclaimer (abbreviation reclaimer) is in order to take whole loose shape material stockpile, and its cantilever must can turn round and pitching.Be installed in the Belt Conveying frame on the cantilever, its inclination angle also will change along with the pitching of cantilever.Because the inclination angle of band conveyor frame is unfixing on the reclaimer cantilever, therefore, generally is not suitable for installing the belt conveyer scale for trade settlement on the reclaimer cantilever.But for the feeding amount to reclaimer is measured, usually in follow-up ground flow, select to meet the fixed angle Belt Conveying frame that the belt conveyer scale condition is installed belt conveyer scale is installed, satisfy the needs of the bulk material accuracy of measuring.Therefore cause feeding source from reclaimer to suitable length of the time interval of finishing material metering, general all more than dozens of minutes, be unfavorable for that the reclaimer operator accurately grasps the feeding amount.
The belt conveyer scale method of calibration mainly contains simulation verification and physical goods inspection.The simulation verification mainly adopts the chain code with standard weights to cover in whole effectively range of weighing of belt conveyer scale, relatively determines the accuracy of measuring of belt conveyer scale by cumulative amount and the theoretical cumulative amount that calculates of metering chain code generation; The material of belt conveyer scale again weighing on the static scale of pin-point accuracy grade more and the common employing of physical goods inspection will be flowed through, with the weighing value of static scale as standard value, the accuracy of verification belt conveyer scale.
Reclaimer adopts oblique pull cable structure cantilever mounted usually, except bucket wheel and Belt Conveying frame are installed, only provides the walkway of Belt Conveying frame both sides on the cantilever, and the activity space on the cantilever is very little.If it will be very inconvenient on the reclaimer cantilever arm belt scale being carried out the chain code check.Because the cantilever of reclaimer is higher, the climbing staircase is narrow precipitous, and every section chain code has the hundreds of kilogram, hangs chain code with hoisting device uneconomical, then quite is difficult for and safe can not be guaranteed with a dead lift.Simultaneously, a large amount of chain codes is concentrated the local location that is deposited in the reclaimer cantilever, can change the distribution of force of cantilever, the safety that jeopardizes reclaimer.Therefore, carry out the chain code check at cantilever basically infeasible.And carry out calibration equipment expense that physical goods inspection needs and other expense to not being for the arm belt scale of trade settlement, also be suitable uneconomical.In addition, no matter be simulation verification or physical goods inspection arm belt scale, all there is the problem of breaks in production.
The patent No. is that 201020630160 utility model patent discloses a kind of self checking belted electronic balance, belt conveyer scale and a contrast correction instrument by the independent metering of two covers form, cover in the two cover belt conveyer scales is as weighing belt conveyer scale (metering units), and is another set of as verification belt conveyer scale (verification unit).Metering units is born daily gage work, verification unit is measured the inventory through metering units equally, the weight of verification unit metering also comprises the weight of standard test weight under the verification state, contrast is revised instrument by gathering simultaneously the variable of metering units and verification unit, the weight of contrast standard counterweight, the data that metering units gathers are revised, make belt conveyer scale can under normal operation, finish automatic Verification, automatically revise, what both guaranteed to produce carries out continuously, can keep the accuracy of measuring again.Contrast equation: the standard test weight that the material metage displayed value+verification unit of instrument displayed value=verification unit metering value – metering units variable=verification unit is revised in the contrast material metage displayed value of the demonstration value – metering units=standard test weight gravimetric value of weighing.When not applying standard test weight, contrast is revised the instrument displayed value and is should be 0.Be not 0 o'clock, illustrate that metering units has error in dipping.When applying standard test weight, contrast is revised the instrument displayed value and is should be the gravimetric value that equals standard test weight.As unequal, can revise the displayed value of instrument and the gravimetric value verification metering units of standard test weight according to contrast.In fact, the patent No. is that the inventor of 201020630160 utility model patents has ignored verification unit itself and also has error in dipping, can not ignore simply the error that verification unit exists.Here need to consider metering units and verification unit accuracy of measuring hierarchical problem separately.If the accuracy of measuring grade of verification unit is higher than the accuracy of measuring grade of metering units, can ignore again the error that two kinds of grades produce simultaneously, so above-mentioned equation can be set up.If the accuracy of measuring ad eundem of verification unit and metering units exists: the material metage displayed value of verification unit ≠ weight of material value so; The standard test weight of the verification unit displayed value ≠ standard test weight gravimetric value of weighing; So obtain: instrument displayed value ≠ standard test weight gravimetric value is revised in contrast.Therefore, the self checking purpose be realized, the accuracy of measuring grade of metering units must be higher than as the accuracy of measuring grade of verification unit belt conveyer scale.And the patent No. is that metering units and verification unit adopt in 201020630160 utility model patents belt conveyer scale material and structure are basically identical, only verification unit increases the mechanism of hanging standard test weight, the accuracy of measuring grade that can not guarantee verification unit is higher than metering units, and there is the imperfection part in this patent.As long as the patent No. is the problem that 201020630160 utility model patents solve accuracy of measuring grade, the self checking that is used for so the fixed angle belt conveyer scale is feasible.If but this patent is used for becoming the self checking of inclined angle belt scale, then new problem can occur.For the Belt Conveying frame of variable pitch, belt conveyer scale mounted thereto must can compensate the error in dipping that change of pitch angle causes.So not only the belt conveyer scale of metering units need to compensate error of tilt, and the belt conveyer scale of verification unit also will compensate error of tilt, and the error in dipping that change of pitch angle produces is far longer than the minimum accuracy of measuring grade of belt conveyer scale national Specification.Therefore, after the over-compensation error of tilt, no matter how high the accuracy of measuring grade of belt conveyer scale under the fixed angle state of verification unit have, and all is in same levels with the accuracy of measuring of metering units under the state that becomes the inclination angle.Even that is to say the patent No. is that 201020630160 utility model patents are after the accuracy of measuring grade that solves verification unit is higher than this problem of the accuracy of measuring of metering units, also be only applicable to the self checking of fixed angle belt conveyer scale, and can not be used for becoming the self checking of inclined angle belt scale.Draw thus, the patent No. is that 201020630160 utility model patents want not only to have technical obstacle for the self checking that becomes the inclined angle belt scale, also uneconomical on cost: as to need after all the extra cover belt conveyer scale of installing, and if can compensate the belt conveyer scale of error of tilt.
Summary of the invention
The accuracy of measuring grade that problem to be solved in the utility model provides a verification belt conveyer scale is higher than arm belt scale accuracy of measuring grade and realizes the check system of the automatic physical goods inspection accuracy of measuring of arm belt scale.
The utility model arm belt scale is realized the system of the physical goods inspection accuracy of measuring automatically, and it comprises arm belt scale, ground belt conveyer scale and belt conveyer scale verification computing machine; Belt conveyer scale verification computing machine is connected with the ground belt conveyer scale with the arm belt scale respectively, belt conveyer scale verification computing machine and arm belt scale bidirectional data communication, belt conveyer scale verification computing machine and ground belt conveyer scale one-way communication.The accuracy of measuring grade of ground belt conveyer scale is higher than the arm belt scale.
Principle of work of the present utility model is: measurement flow is through the inventory of oneself respectively for arm belt scale and ground belt conveyer scale, and belt conveyer scale verification computing machine is born the task of calculating error in dipping; Belt conveyer scale verification computing machine receives the material metering value of arm belt scale and ground belt conveyer scale, after belt conveyer scale verification computing machine compares both variable errors, send the data message of revising the accuracy of measuring to the arm belt scale, after the arm belt scale receives and revises data, revise relevant measuring parameter, finish the physical goods inspection process of arm belt scale.
The beneficial effects of the utility model are: native system has been realized the physical goods inspection accuracy of measuring of arm belt scale automatically, exempted the manual maintenance of the arm belt scale accuracy of measuring, high-frequency verification has avoided contingency on safeguarding the impact of the arm belt scale accuracy of measuring, the inventory (being generally several kilotons to several ten thousand tons) of large quantity makes the confidence level of verification demarcate far above artificial materials calibration, artificial chain code, be merged into arm belt scale verification in the material extracting operation process and do not interfere the material extracting operation of reclaimer, not the activity duration of the outer reclaimer of occupying volume; Guaranteed that the reclaimer operator accurately grasps the feeding amount, guaranteed the accuracy of feeding from the feeding source of reclaimer, the feeding amount has been realized real-time control.
Description of drawings
Fig. 1 is the theory diagram of the utility model system.
Embodiment
As shown in Figure 1, the utility model arm belt scale is realized the system of the physical goods inspection accuracy of measuring automatically, and it comprises arm belt scale 1, ground belt conveyer scale 2 and belt conveyer scale verification computing machine 3; Belt conveyer scale verification computing machine 3 is connected with the ground belt conveyer scale with arm belt scale 1 respectively and is connected, belt conveyer scale verification computing machine 3 and arm belt scale 1 bidirectional data communication, belt conveyer scale verification computing machine 3 and ground belt conveyer scale 2 one-way communications.
Wherein, the accuracy of measuring grade of ground belt conveyer scale 2 is higher than arm belt scale 1.
Ground belt conveyer scale 2 is installed on the different Belt Conveying frames from arm belt scale 1.
Principle of work of the present utility model is: measurement flow is through the inventory of oneself respectively for arm belt scale and ground belt conveyer scale, and belt conveyer scale verification computing machine is born the task of calculating error in dipping; Belt conveyer scale verification computing machine receives the material metering value of arm belt scale and ground belt conveyer scale, after belt conveyer scale verification computing machine compares both variable errors, send the data message of revising the accuracy of measuring to the arm belt scale, after the arm belt scale receives and revises data, revise relevant measuring parameter, finish the physical goods inspection process of arm belt scale.
In when work, same batch materials flow through respectively arm belt scale 1 and ground belt conveyer scale 2, arm belt scale 2 and ground belt conveyer scale 2 measures respectively the material that passes through oneself.Belt conveyer scale verification computing machine 3 is born the task of calculating error in dipping, belt conveyer scale verification computing machine 3 is connected with the ground belt conveyer scale with arm belt scale 1 respectively and is connected, belt conveyer scale verification computing machine 3 receives the material metering value of arm belt scale 1 and ground belt conveyer scale 2, after belt conveyer scale verification computing machine 3 compares both variables, calculate the margin of error of 1 batch of variable of arm belt scale.After the comprehensive multiple batches of variable margin of error, carry out probability statistics, determine the fluctuation range of arm belt scale accuracy of measuring error, the assessment errors correction.Belt conveyer scale verification computing machine 3 calculates the data value of the arm belt scale correction accuracy of measuring according to the calibration corrections of assessment, and send to arm belt scale 1, the arm belt scale connect 1 receive revise data value after, revise relevant measuring parameter, finish the physical goods inspection process of arm belt scale.
Arm belt scale in the native system is installed on the Belt Conveying frame of reclaimer cantilever, mainly be to provide real-time feeding amount data for operator in time, grasp the opportunity that stops feeding, improve the accuracy of a feeding amount, do not participate in the clearing of feeding amount.Simultaneously, because the arm belt scale need to compensate the error in dipping that the cantilever change of pitch angle causes, its accuracy of measuring is the unnecessary accuracy of measuring grade that reaches the ground belt conveyer scale also, as long as the accuracy of measuring of arm belt scale can remain in the error range of permission, just can satisfy actual needs, the accuracy of measuring requirement that is the arm belt scale is not high, as long as the accuracy of measuring is reliable and stable.Therefore, according to application target and the requirement of arm belt scale, can with the cumulative amount of the ground belt conveyer scale that is used for clearing in the flow process standard value as the verification arm belt scale accuracy of measuring, no longer need extra standard test weight auxiliary examination.The ground belt conveyer scale is installed on the belt conveyor frame that is fixed on ground, and mounting condition all meets national standard, the situation that does not exist the inclination angle to change.Therefore, the ground belt conveyer scale need not pour angle compensation.The ground belt conveyer scale is mainly used in metering and clearing, need to have the measurement instrument licence, and must regularly carry out accuracy of measuring verification.
The utility model not only is applicable to loose shape material reclaimer, so long as be installed in the belt conveyer scale on the moving equipment of variable pitch, can be suitable for.Be above-described embodiment in any form restriction this is not novel, all employings are equal to replaces or technical scheme that equivalent transformation forms, all drops on the protection domain of this novel requirement.