CN105222878A - The simple and easy method of adjustment of a kind of large-tonnage hopper weighing system - Google Patents
The simple and easy method of adjustment of a kind of large-tonnage hopper weighing system Download PDFInfo
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- CN105222878A CN105222878A CN201510545743.1A CN201510545743A CN105222878A CN 105222878 A CN105222878 A CN 105222878A CN 201510545743 A CN201510545743 A CN 201510545743A CN 105222878 A CN105222878 A CN 105222878A
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Abstract
The invention discloses the simple and easy method of adjustment of a kind of large-tonnage hopper weighing system, the method carries out the inspection of LOAD CELLS successively; The inspection of described terminal box; The inspection of weight display; The installation check of LOAD CELLS; The ground connection of LOAD CELLS checks; The inspection of field wiring; The inner parameter of weight display is arranged; The overall performance test of weighing system; The Zero calibration of weighing system; Total millivolt of value of weighing system calculates; The full scale of weighing system is demarcated; By the arbitrary value inspection adjustment result in full range.First the present invention guarantees the reaction of system to tiny signal, and by calculating the range of adjustment weight display to the theoretical value of sensor measurement scope; Again the arbitrary value in setting range is detected.For counterweight standardization in the past, the present invention is that large-tonnage hopper weighing system provides a kind of practicable method of adjustment, and the work efficiency that can improve, saves time, cost-saving, simple.
Description
Technical field
The present invention relates to the field of weighing, specifically, relate to a kind of simple and easy method of adjustment of large-tonnage hopper weighing system, the method can complete the adjustment of large-tonnage hopper weighing system simply and effectively.
Background technology
Three large bases of modern information technologies are the collection of information, transmission and treatment technology, i.e. sensing technology, the communication technology and computer technology, and they constitute " sense organ ", " nerve " and " brain " of information technology system respectively.The primary parts of information acquisition system are sensors, and are placed in system foremost.In a modern automatic checkout system, if there is no sensor, just cannot characterize the various parameters of links in production run by Inspect and control, also just cannot realize automatic control.In modern technologies, sensor is actually the basis of modern test technology and automatic technology.
LOAD CELLS is called as the heart component in electronic scale.The develop rapidly of science and technology, the electronic scale made by LOAD CELLS is also widely applied to all trades and professions, achieves the weighing fast and accurately to material.Particularly along with the appearance of microprocessor, improving constantly of industrial processes automaticity, LOAD CELLS has become a kind of required device in process control, control from the weight measurements such as the large tank can not weighed in the past, hopper and the measurement such as crane scale, weighter for truck, automatic detection in the feed proportioning system, production technology of mixed allocation plurality of raw materials and the control of bulk material inlet amount etc., all apply LOAD CELLS.At present, LOAD CELLS has almost applied to all fields of weighing.
The scaling method general for adjustment large-tonnage hopper weighing system is counterweight standardization.After usually having demarcated zero point, the counterweight of the weight such as full scale being loaded into weighing system sensor installs on stressed platform, the counterweight that weighing system uses that tonnage is larger is in the process more, relative manpower transport's counterweight number of times is more, demarcation required time is longer, work efficiency is extremely low, and a large amount of counterweight transports, carrying are also comparatively difficult.
Summary of the invention
The present invention is to solve adopt the technical matters that counterweight standardization difficulty is large, labor intensive material resources are many during existing adjustment large-tonnage hopper weighing system, provide the simple and easy method of adjustment of a kind of large-tonnage hopper weighing system, the adjustment of large-tonnage hopper weighing system can be made simple, specification and technological requirement can be met preferably again simultaneously.
In order to solve the problems of the technologies described above, the present invention is achieved by following technical scheme:
The simple and easy method of adjustment of a kind of large-tonnage hopper weighing system, this weighing system comprises some LOAD CELLS, weight display, a terminal box, it is characterized in that, the method adopts a precision higher than the signal generator of weighing system precision, and carries out in accordance with the following steps:
(1) described LOAD CELLS is checked;
(2) described terminal box is checked;
(3) described weight display is checked;
(4) installation of described LOAD CELLS is checked;
(5) ground connection inspection is carried out to described LOAD CELLS;
(6) field wiring is checked;
(7) inner parameter of described weight display is set;
(8) weighing system carries out overall performance test;
(9) weighing system carries out Zero calibration: described weight display input tare weight millivolt value given by described signal generator, can demarcate zero point;
(10) total millivolt of value of weighing system is calculated: total millivolt value=tare weight millivolt value+net weight millivolt value; Wherein said tare weight millivolt value directly can read in the menu ISN of described weight display; Described net weight millivolt value calculates according to the number of full scale design load, LOAD CELLS driving voltage, LOAD CELLS sensitivity, LOAD CELLS and single LOAD CELLS tonnage value and obtains, and computing formula is net weight millivolt value=(sensitivity of full scale design load * LOAD CELLS driving voltage * LOAD CELLS)/(number of single LOAD CELLS tonnage value * LOAD CELLS);
(11) full scale of weighing system is demarcated: utilize described signal generator to export described total millivolt of value, and be directly added in the input signal end of described weight display, after the ISN of described weight display display is stable, the full scale of weighing system can be demarcated;
(12) inspection adjustment result: utilize at least three any millivolt values in described signal generator loading full range and record; And the displayed value of the output signal value of described signal generator with described weight display is compared, within the error the allowed band whether displayed value detecting described weight display requires in its product technology;
When the displayed value of described weight display is within its error allowed band, adjustment process terminates;
When the displayed value of described weight display exceeds its error allowed band, perform step (7).
Utilize described signal generator to load millivolt value in full range in step (12), be specially get tare weight millivolt value+net weight millivolt value 25%, 50% of tare weight millivolt value+net weight millivolt value, 75% of tare weight millivolt value+net weight millivolt value.
The invention has the beneficial effects as follows:
The present invention is by the performance test to hopper weighing system, and then the test to LOAD CELLS sensitivity, guarantees the reaction of system to tiny signal, by calculating the theoretical value of LOAD CELLS measurement range, and the range of adjustment weight display; Then, then the arbitrary value in setting range is detected, finally, adjust result by the practical application inspection in producing.For counterweight standardization in the past, the present invention is that large-tonnage hopper weighing system provides a kind of practicable method of adjustment, and the work efficiency that can improve, saves time, cost-saving, simple.
Accompanying drawing explanation
Fig. 1 is the process flow chart of the simple and easy method of adjustment of large-tonnage hopper weighing system provided by the present invention.
Embodiment
For summary of the invention of the present invention, feature and effect can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
As shown in Figure 1, present embodiment discloses the simple and easy method of adjustment of a kind of large-tonnage hopper weighing system, relate to the hopper weighing system in certain project sintered material system, this weighing system comprises some LOAD CELLS, weight display, a terminal box, the method additionally uses a signal generator, and signal generator precision must higher than the precision of weighing system.
Relevant parameters involved in the present embodiment and process conditions as follows:
What signal generator was selected is Britain De Luke DruckDPI620 pressure testers, it is the modular portable check system comprising the pressure testers integrating world-class, multi-functional process signal check meter, and its feature is: the high precision of 0.005%FS; WinCE system Orion; USB principal and subordinate interface supports computer and peripherals.
The weight display of what weight display was selected is Yuyao Pacific Weighting Engineering Co., Ltd, model is PA8110A type, it is high precision 0.01%FS, low drifting amplifier, 24 high-speed a/d converters and monolithic display driver, and it is the regulation of 3 grades that its basic mechanical design feature index meets accuracy grade in GB/T7724-1999 " weight display controller ".
LOAD CELLS is resistance strain weighing transducer, CZL-YB type, driving voltage DC8V needed for it, sensitivity 1.5mV/V, rated load amount 200 tons, precision 0.05%FS.
The concrete steps of the simple and easy method of adjustment of large-tonnage hopper weighing system that the present embodiment provides are as follows:
The inspection of step one, LOAD CELLS: LOAD CELLS is the core component of weighing system, it should be selected according to weigh operating mode (as impact, overload, high temperature etc.), actual technological requirement and demand of technical standard of scene.General normal temperature LOAD CELLS is no more than rated load 80%; High temperature weighing sensor is no more than rated load 50% and selects.Working-yard is commonly used quantity and is 3 to 4.
Be 600 tons according to technological requirement range in the present embodiment, be no more than 80% of rated load, LOAD CELLS should select four, and every only at least 200 tons, design meets technological requirement.
The inspection of step 2, terminal box: terminal box provides excitation power supply to each LOAD CELLS in weighing system, the output signal of each LOAD CELLS in terminal box through electric current with converge into a road signal after calculating and be supplied to weight display.Therefore selecting of terminal box should be mated with LOAD CELLS.
The inspection of step 3, weight display: weight display can output drive voltage volt value, receives the tiny signal of LOAD CELLS and makes it to amplify display, being converted to the desired signal of host computer.
Step one to step 3 is that the basic element of character that weighing system is formed checks, selecting of LOAD CELLS, terminal box, weight display must meet technological requirement, designing requirement and product technology documentation requirements.
The installation check of step 4, LOAD CELLS: active line and the stressed dead in line of LOAD CELLS that should ensure loading force, make the impact of Tilt loading and eccentric load reduce to minimum.Being sure not exerts all one's strength at the position such as overcoat and lead-in wire causes LOAD CELLS to damage.Sensor is installed and should be stablized firmly.
The ground connection of step 5, LOAD CELLS checks: in order to prevent big current directly by LOAD CELLS body, damages internal strain meter, the bypass apparatus that can do at LOAD CELLS charger two termination copper litz wire during installation.Forbid that the ground connection utilizing LOAD CELLS carries out electric welding field.
In step 4, step 5, the installation of LOAD CELLS and ground protection must meet specification and product technology documentation requirements.Ensure the accuracy that LOAD CELLS is measured, avoid LOAD CELLS impaired.
Step 6, field wiring inspection: should select shielded cable by LOAD CELLS to weight display and the master die analog quantity signal wire that exported by weight display, screen layer in weight display one end single-end earthed.Shielded cable can not be arranged in same wire casing with power power-line, should adopt independent metal penetration pipe.Wiring, wiring should meet specification and product technology documentation requirements, guarantee that Signal transmissions is reliable.
Step 7, weight display inner parameter are arranged: the inner parameter setting weight display according to design and product technology documentation requirements.The present embodiment is according to design range 0 ~ 600 ton, and scaling position is set to one, and scale division value is set to 20 tons, and measurement unit is ton.
Step 8, weighing system performance test: comprise test connection line, the installation situation of LOAD CELLS, the performance etc. of LOAD CELLS and terminal box.First check that hopper should connect without hard power and interior no-sundries; Then open instrument power, first all potentiometers are transferred to maximal value, when confirming empty scale, weight display is shown zero setting.Be carried near each LOAD CELLS successively in order to identical counterweight (such as multiple people), observe the reading of weight display, General Requirements deviation of reading is less than 5%, if deviation is excessive, the height of LOAD CELLS should be regulated, make the uniform force of each LOAD CELLS, the signal value of output should be identical.
Weighing system performance test is the precondition of demarcating weighing system, if this step goes wrong, staking-out work below cannot be carried out.
Step 9, weighing system Zero calibration: confirm that hopper supports without hard power, hopper hole capital after selling all securities no-sundries.Weight display enters demarcation state, and setting zero point also preserves.Generally press " back to zero " key, and press the preservation of " confirmation " key.Concrete operations are according to product technology file.
According to the principle of work piezoelectric effect of LOAD CELLS, LOAD CELLS is not when having stressed, apply its millivolt value exported of driving voltage and should be zero, but the hopper due to scene just has tens tons of weights, therefore LOAD CELLS should have corresponding millivolt value to export after applying driving voltage, and this millivolt of value available signal generator records.Generally all to remove gross weight when Zero calibration, therefore, utilize precision to input the millivolt value of gross weight to weight display higher than the signal generator of weight display, can zero point be demarcated.
The calculating of step 10, weighing system total millivolt value: the calculating of the total millivolt value of weighing system is the basis carrying out demarcating without counterweight timing signal full scale.
Computing formula is: total millivolt value=tare weight millivolt value+net weight millivolt value;
Wherein tare weight millivolt value directly can read in the menu ISN of weight display;
Wherein net weight millivolt value calculates according to the number of full scale design load, LOAD CELLS driving voltage, LOAD CELLS sensitivity, LOAD CELLS and single LOAD CELLS tonnage value and obtains,
Computing formula is: net weight millivolt value=(sensitivity of full scale design load * LOAD CELLS driving voltage * LOAD CELLS)/(number of single LOAD CELLS tonnage value * LOAD CELLS)
In the present embodiment, tare weight millivolt value is 0.9647mV; According to full scale design load 0 ~ 600 ton, LOAD CELLS driving voltage 8V, LOAD CELLS sensitivity 1.5mV/V, the number of LOAD CELLS 4, single LOAD CELLS tonnage value 200 tons, calculating net weight millivolt value is: net weight millivolt value=(600*8*1.5)/(200*4)=9.0 (mV).Total millivolt of value is 9.0+0.9647=9.9647 (mV).
The demarcation of step 11, weighing system full scale, utilizes precision to replace large-tonnage counterweight value as signal source with this higher than the signal generator of weight display:
Utilize precision higher than the signal generator of weight display and before the deadline, export total millivolt of above-mentioned value, and be directly added in the input signal end+SIG of weight display,-SIG, after the ISN that display to be weighed shows is stable, the full scale of weighing system can be demarcated, replace the counterweight value of loading with this.
Step 12, inspection adjustment result: utilize precision higher than any millivolt value in the signal generator loading full range of weight display and record, 25%, 50%, 75% of the tare weight millivolt value+net weight millivolt value of general feeding storehouse weight, detects simultaneously and exports to the corresponding milliampere value of host computer and record;
The tare weight millivolt value 0.9647mV of feeding storehouse weight adds 2.25mV, 4.5mV, 6.75mV respectively in the present embodiment, and detection exports to 4 ~ 20 milliamperes of corresponding values of host computer and record.
The output signal value of signal generator is compared with the displayed value of weight display, detects the displayed value of weight display whether within the error 0.01%FS allowed band of its product technology documentation requirements;
When the displayed value of weight display is within its error allowed band, adjustment process terminates;
When the displayed value of weight display exceeds its error allowed band, repeat step step 7 to step 12, until the displayed value of weight display is within its error allowed band.
Implementation result: adopt method of the present invention to adjust large-tonnage hopper weighing system, can increase work efficiency, shorten the time of adjustment, complete Suitable content simply easily; The result simultaneously adjusted meets code requirement and technological requirement, workable, Be very effective.
Comprehensive above-described embodiment can be found out, the present invention is applicable to the field adjustable of large-tonnage hopper weighing system, the applicable ore deposit groove bunker scale as blast furnace of the method, sintered material bunker scale, mixing, shop fixtures bunker scale, central cooler hopper scale, the adjustment of the feed bin weighing system of converter etc.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make the concrete conversion of a lot of form, these all belong within protection scope of the present invention.
Claims (2)
1. the simple and easy method of adjustment of large-tonnage hopper weighing system, this weighing system comprises some LOAD CELLS, weight display, a terminal box, it is characterized in that, the method adopts a precision higher than the signal generator of weighing system precision, and carries out in accordance with the following steps:
(1) described LOAD CELLS is checked;
(2) described terminal box is checked;
(3) described weight display is checked;
(4) installation of described LOAD CELLS is checked;
(5) ground connection inspection is carried out to described LOAD CELLS;
(6) field wiring is checked;
(7) inner parameter of described weight display is set;
(8) weighing system carries out overall performance test;
(9) weighing system carries out Zero calibration: described weight display input tare weight millivolt value given by described signal generator, can demarcate zero point;
(10) total millivolt of value of weighing system is calculated: total millivolt value=tare weight millivolt value+net weight millivolt value; Wherein said tare weight millivolt value directly can read in the menu ISN of described weight display; Described net weight millivolt value calculates according to the number of full scale design load, LOAD CELLS driving voltage, LOAD CELLS sensitivity, LOAD CELLS and single LOAD CELLS tonnage value and obtains, and computing formula is net weight millivolt value=(sensitivity of full scale design load * LOAD CELLS driving voltage * LOAD CELLS)/(number of single LOAD CELLS tonnage value * LOAD CELLS);
(11) full scale of weighing system is demarcated: utilize described signal generator to export described total millivolt of value, and be directly added in the input signal end of described weight display, after the ISN of described weight display display is stable, the full scale of weighing system can be demarcated;
(12) inspection adjustment result: utilize at least three any millivolt values in described signal generator loading full range and record; And the displayed value of the output signal value of described signal generator with described weight display is compared, within the error the allowed band whether displayed value detecting described weight display requires in its product technology;
When the displayed value of described weight display is within its error allowed band, adjustment process terminates;
When the displayed value of described weight display exceeds its error allowed band, perform step (7).
2. the simple and easy method of adjustment of a kind of large-tonnage hopper weighing system according to claim 1, it is characterized in that, utilize described signal generator to load millivolt value in full range in step (12), be specially get tare weight millivolt value+net weight millivolt value 25%, 50% of tare weight millivolt value+net weight millivolt value, 75% of tare weight millivolt value+net weight millivolt value.
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| CN110530490A (en) * | 2019-07-27 | 2019-12-03 | 王勇 | A kind of calibration method that digital indication claims |
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Cited By (3)
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| CN109900348A (en) * | 2017-12-08 | 2019-06-18 | 奥豪斯仪器（常州）有限公司 | A kind of method that instrument and scale body arbitrarily match combination |
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Application publication date: 20160106 |