CN201731928U - Weighing system with multiple weight calibration and control points - Google Patents
Weighing system with multiple weight calibration and control points Download PDFInfo
- Publication number
- CN201731928U CN201731928U CN2010201988792U CN201020198879U CN201731928U CN 201731928 U CN201731928 U CN 201731928U CN 2010201988792 U CN2010201988792 U CN 2010201988792U CN 201020198879 U CN201020198879 U CN 201020198879U CN 201731928 U CN201731928 U CN 201731928U
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- weighing
- weighing system
- load cells
- slave computer
- school
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Abstract
The utility model discloses a weighing system with multiple weight calibration and control points, which comprises a lower computer in series connection with a weighing device. The weighing system is characterized by further including an upper management computer, a weighing transmitter, a weighing sensor and a measuring hopper, the measuring hopper is arranged on the weighing device, the weighing sensor is arranged inside the measuring hopper, an output end of the weighing sensor is connected in series with the weighing transmitter prior to being connected with an input end of the lower computer, and an output end of the upper management computer is connected with the input end of the lower computer. The weighing system with multiple weight calibration and control points has the advantages of rapid and accurate weight calibration, and improvement in dynamic measurement precision.
Description
Technical field
The utility model relates to the weighing system of various weighing devices, especially is fit to the weighing device that range ability is big, the school claims difficulty.The quick school of Cement Concrete Mixing, asphalt concrete mixer is claimed and improves measuring accuracy and played bigger effect.
Background technology
At present, weighing device has by instrument control metering, has by PLC control metering.Two point form is adopted in the calibration of weighing device more, promptly calibrate zero point and full scale point A (X1, Y1).Think that point between zero point and the A point all on the line that zero point and A are ordered, both thought that it was linear claiming.Because the measuring accuracy of weighing device (linear quality) is influenced by the shape, structure of quantity, the weighing device of LOAD CELLS etc., cause linear badly, even zero point and A point are calibrated, most intermediate point is not on straight line OA.May be that off-straight OA is a lot of as the dotted line in the accompanying drawing 1.The school claims comparatively complicated, difficult.The school claims also to differ and reaches the regulation permissible accuracy surely repeatedly, and the school claims that personnel's workload is big, and the dynamic measurement precision also is affected simultaneously.
The utility model content
The utility model purpose is to provide a kind of weighing system that the multiple spot school claims and controls that has at the defective that prior art exists.
The utility model adopts following technical scheme for achieving the above object:
The utlity model has the weighing system that the multiple spot school claims and controls, comprise slave computer serial connection weighing device, it is characterized in that also comprising senior management computer, weight transmitter, LOAD CELLS and weighing hopper, wherein weighing hopper is arranged on the weighing device, LOAD CELLS is arranged in the weighing hopper, connect the input end of slave computer behind the output terminal serial connection weight transmitter of LOAD CELLS, the input end of the output termination slave computer of senior management computer.
Preferably, described slave computer adopts Programmable Logic Controller (PLC).
Preferably, described weight transmitter employing model is the weight transmitter of TR700.
Preferably, described LOAD CELLS employing model is the LOAD CELLS of 619-1500-G.
Preferably, weighing system comprises n LOAD CELLS that is distributed on the weighing device, and wherein n is the natural number greater than 1.
Preferably, described slave computer also comprises the overload alarm device, the output terminal of the input termination slave computer of described overload alarm device.
The utility model is fast fast, the school claims that accurately, the dynamic measurement precision also is improved.
Description of drawings
Fig. 1 is that the two-point method school claims synoptic diagram.
Fig. 2 is the utility model patent structure synoptic diagram.
Fig. 3 is that the multipoint method school claims synoptic diagram.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to utility model:
The utility model is made up of senior management computer, slave computer Programmable Logic Controller (PLC), weight transmitter, LOAD CELLS, weighing hopper.LOAD CELLS gather alleged material in the weighing hopper weight signal, send into weight transmitter, weight transmitter and the electric signal of the mV level of sending into changed into the normalized current signal (4～20mA) send into Programmable Logic Controller, Programmable Logic Controller by the programmed control weighing device of setting.Flow process is seen accompanying drawing 2.
In accompanying drawing 3 (only 4 schools claim method for example).X-axis is the weight of alleged material, and Y-axis is the electric signal that weight transmitter is exported, and the electric signal that the weight of alleged material and weight transmitter are exported is corresponding one by one.
The utility model, have that the multiple spot school claims and the Weighing method of the weighing system controlled, adopt LOAD CELLS that the weight signal of alleged material in the weighing hopper of gathering is sent into weight transmitter, adopting weight transmitter is the voltage signal of sending into that weight signal changes the normalized current signal into and sends into slave computer, slave computer is by the control program control weighing device of setting, and senior management computer is monitored slave computer and set the slave computer control program.
Has the Weighing method that the multiple spot school claims and controls, material upper and lower bound threshold values is set in the LOAD CELLS, the upper and lower bound that weight of material bears greater than weighing device in LOAD CELLS detects weighing device then sends alerting signal to overload alarm device by slave computer and reports to the police.
Preferably, when the school claims, on weighing device, add the counterweight of setting quantity at every turn, after weighing device is stable, the normalized current signal value of the output of weight transmitter and counterweight gravimetric value are saved in host computer, and behind the counterweight full scale on the weighing device, the school claims to finish.
The purpose of this utility model is achieved in that
When the school claims,, again LOAD CELLS stressed adjusted to basic identical at first measuring apparatus adjustment level, do not have interference with neighboring devices.The state of this moment is the zero point of title, the normalized current signal value and the weight of the output of weight transmitter at this moment is saved in host computer, and downloads in the slave computer.Add the counterweight of some at every turn on measuring apparatus, after claiming to stablize, the normalized current signal value and the weight of the output of weight transmitter are saved in host computer, after repeatedly, the counterweight that deserves to be called is basically near behind the full scale, and the school claims to finish.At this moment gathered many points, all deposited on the slave computer, slave computer according to these points, is calculated adjacent equation of line at 2 when initialization, and the parameter of these points and straight-line equation is kept in the permanent register.Get some points (greater than 2 points) in the range ability of weighing device, the gravimetric value of these points and corresponding electric signal were all preserved as coordinate points when the school claimed.These points are linked up, constituted the multistage broken line.Gravimetric value all on the multistage broken line, can be obtained according to the equation of line of every line segment in the broken line.Claim a corresponding line segment claims correspondence to the multiple spot school multistage broken line, error amount reducing at double by 2 schools.The straight line equation of line of each line segment is as follows:
Line segment 0A3:y=kx+b (k=y3/x3, b=0)
Line segment 0A1:y=k1x+b1 (k1=y1/x1, b1=0)
Line segment A1A2:y=k2x+b2 (k2=(y2-y1)/(x2-x1), b2=(x2y1-x1y2/ (x2-x1))
Line segment A2A3:y=k3x+b3 (k2=(y3-y2)/(x3-x2), b3=(x3y2-x2y3/ (x3-x2))
In metering process, slave computer is judged the line segment that this point is affiliated according to the normalized current signal value of weight transmitter output, calculates corresponding gravimetric value according to the equation of line of this line segment, and control hopper door with this value and open and close, on host computer, show this gravimetric value simultaneously.Claim that by the method school the school claims fast and accurately, the dynamic measurement precision also is improved.
Claims (6)
1. one kind has the weighing system that the multiple spot school claims and controls, comprise slave computer serial connection weighing device, it is characterized in that also comprising senior management computer, weight transmitter, LOAD CELLS and weighing hopper, wherein weighing hopper is arranged on the weighing device, LOAD CELLS is arranged in the weighing hopper, connect the input end of slave computer behind the output terminal serial connection weight transmitter of LOAD CELLS, the input end of the output termination slave computer of senior management computer.
2. according to claim 1 have a weighing system that the multiple spot school claims and controls, and it is characterized in that described slave computer adopts Programmable Logic Controller (PLC).
3. according to claim 1 have a weighing system that the multiple spot school claims and controls, and it is characterized in that it is the weight transmitter of TR700 that described weight transmitter adopts model.
4. according to claim 1 have a weighing system that the multiple spot school claims and controls, and it is characterized in that it is the LOAD CELLS of 619-1500-G that described LOAD CELLS adopts model.
5. according to claim 1 have a weighing system that the multiple spot school claims and controls, and it is characterized in that weighing system comprises n LOAD CELLS that is distributed on the weighing device, and wherein n is the natural number greater than 1.
6. according to claim 1 and 2 have a weighing system that the multiple spot school claims and controls, and it is characterized in that described slave computer also comprises the overload alarm device, the output terminal of the input termination slave computer of described overload alarm device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201988792U CN201731928U (en) | 2010-05-21 | 2010-05-21 | Weighing system with multiple weight calibration and control points |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201988792U CN201731928U (en) | 2010-05-21 | 2010-05-21 | Weighing system with multiple weight calibration and control points |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201731928U true CN201731928U (en) | 2011-02-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201988792U Expired - Lifetime CN201731928U (en) | 2010-05-21 | 2010-05-21 | Weighing system with multiple weight calibration and control points |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201731928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790276A (en) * | 2015-02-13 | 2015-07-22 | 徐州徐工筑路机械有限公司 | Asphalt mixing station fuel oil consumption rate display system and control method thereof |
-
2010
- 2010-05-21 CN CN2010201988792U patent/CN201731928U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790276A (en) * | 2015-02-13 | 2015-07-22 | 徐州徐工筑路机械有限公司 | Asphalt mixing station fuel oil consumption rate display system and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110202 |