CN103575376A - Circuit and method for solving negative-going drifting of output signals of multiple weighing sensors in on-line mode - Google Patents
Circuit and method for solving negative-going drifting of output signals of multiple weighing sensors in on-line mode Download PDFInfo
- Publication number
- CN103575376A CN103575376A CN201310475110.9A CN201310475110A CN103575376A CN 103575376 A CN103575376 A CN 103575376A CN 201310475110 A CN201310475110 A CN 201310475110A CN 103575376 A CN103575376 A CN 103575376A
- Authority
- CN
- China
- Prior art keywords
- resistance
- load cells
- potentiometer
- negative
- circuit
- Prior art date
- 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.)
- Granted
Links
Images
Abstract
The invention provides a circuit and method for solving negative-going drifting of output signals of multiple weighing sensors in an on-line mode. The circuit comprises a Wheatstone bridge, wherein the Wheatstone bridge is composed of three bridge arms and another bridge arm, the three bridge arms are composed of a first resistor (R1), a second resistor (R2) and a fourth resistor (R4) respectively, and a third resistor (R3) and a first potentiometer (W1) are connected in series to form the another bridge arm. A second potentiometer (W2) and a sixth resistor (R6) are connected in series between a pair of nodes of the Wheatstone bridge, and the other pair of nodes of the Wheatstone bridge form an excitation positive end (EXC+) and an excitation negative end (EXC-) respectively. A signal output positive end (SIG+) and a signal output negative end (SIG-) are formed at the two ends of the sixth resistor (R6) respectively. The problem of the negative-going drifting of the weighing sensors can be solved in the on-line mode without replacing the weighing sensors, the handling method is rapid and effective, and production can be prevented from being affected to the maximum.
Description
Technical field
The invention belongs to field of measuring techniques, relate to the simulation LOAD CELLS circuit of many LOAD CELLS output signal negative sense drifts of a kind of online solution and utilize this circuit to solve the method for many LOAD CELLS output signal negative sense drifts.
Background technology
At metallurgy industry, each production link all be unable to do without electronic scales, and electronic scales is participated in the measure of production and control directly.Generally, an electronic scales has 3 LOAD CELLS at least, 8 to 10 at most.While weighing, LOAD CELLS is converted to electric signal by the weight of weighed object, and then the input end of weighing instrument is inputted in the output signal parallel connection of each LOAD CELLS afterwards, and weighing instrument, by changing and calibrating, finally shows the weight of weighed object.Figure 1 shows that existing electronic scale weighing circuit diagram, it by some LOAD CELLS (N1, N2 ... .Nn) and weighing instrument form, each LOAD CELLS can be reduced to a resistance bridge, and each LOAD CELLS is equipped with signal output plus terminal (SIG+), signal output negative terminal (SIG-), excitation anode (EXC+) and excitation negative terminal (EXC-), and is connected with weighing instrument corresponding port respectively.In actual use, after one period of service time, based on some external cause, be weighed object LOAD CELLS is impacted as when metering, make LOAD CELLS because elastic body itself elastic deformation has occurred and can not return to virgin state, and the factor of LOAD CELLS itself is used after some cycles as LOAD CELLS, output signal was compared drift was occurred with original zero signal output zero point, cause electronic scales in use for some time, the total input signal of its weighing instrument (being the total output signal of LOAD CELLS) is compared with original total input signal, there is variation in various degree.When many LOAD CELLS generation negative sense drifts (are compared with original output signal, LOAD CELLS output signal is negative value output) time, can make the total output signal of LOAD CELLS reduce, so that the total output signal of LOAD CELLS is negative sense output voltage, (the signal input range of weighing instrument is one on the occasion of scope to exceed the input reference signal of weighing instrument, input reference signal is 0 ~ 30mV), cause weighing instrument to work.
Solve problems was all to change the LOAD CELLS that negative sense drift occurs for these in the past, made total output voltage of LOAD CELLS reach virgin state scope.But, change LOAD CELLS spare part input very large, when spares reserve is not enough, plant maintenance personnel cannot solve this type of fault, after can only waiting spare part to put in place, just can fix a breakdown, the normal production of final impact.
Summary of the invention
One of object of the present invention is the problem existing for prior art, a kind of simulation LOAD CELLS circuit that can solve online many LOAD CELLS output signal negative sense drifts is provided, access by this circuit solves LOAD CELLS output signal negative sense drift phenomenon online, avoids the replacing of LOAD CELLS.
Another object of the present invention is to provide a kind of method of utilizing foregoing circuit to solve many LOAD CELLS output signal negative sense drifts.
For this reason, the present invention adopts following technical scheme:
A kind of simulation LOAD CELLS circuit that can solve online many LOAD CELLS output signal negative sense drifts, it is characterized in that, comprise by the first resistance, the second resistance, three brachium pontis that the 4th resistance forms respectively and the resistance bridge being formed by the 3rd resistance and the first potentiometer another brachium pontis in series, between a pair of node of described resistance bridge, be in series with the second potentiometer and the 6th resistance, another of described resistance bridge forms respectively excitation anode and excitation negative terminal to node, the two ends of described the 6th resistance form respectively signal output plus terminal and signal output negative terminal.
Further, described the second potentiometer and the 6th resistance are also in series with the 5th resistance.
Further, the resistance of described the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and the 6th resistance is 300 Ω, and the Standard resistance range of the first potentiometer is 0-250 Ω, and the Standard resistance range of the second potentiometer is 0-20k Ω.
Utilize foregoing circuit to solve a method for many LOAD CELLS output signal negative sense drifts, comprise the steps:
(1), under electronic scales immunization with gD DNA vaccine, the signal output plus terminal of simulation LOAD CELLS circuit, signal output negative terminal, excitation anode are connected respectively with the corresponding port of weighing instrument with excitation negative terminal;
(2) coarse adjustment: according to the negative voltage value of the total output of LOAD CELLS, regulate the first potentiometer resistance, make to simulate LOAD CELLS circuit and export a forward voltage values, offset or make total input voltage value of weighing instrument to increase to forward voltage values with the negative voltage value of LOAD CELLS output;
(3) accurate adjustment: regulate the second potentiometer resistance, make the voltage output value of simulating LOAD CELLS circuit do to change among a small circle, finally make the voltage input value of weighing instrument reach normal value.
Because the resistance of each brachium pontis of electronic scale LOAD CELLS is generally the substitutional resistance of 300 Ω left and right, for matching with LOAD CELLS, the present invention first is all set as 300 Ω to the resistance of the 6th resistance.The resistance that simulation LOAD CELLS circuit is used must be selected wire-wound resistor or the metalfilmresistor that temperature coefficient is little, degree of stability is high, and potentiometer must be selected the multiturn potentiometer of high stability.The effect of the 5th resistance is to guarantee circuit safety, prevents that the second potentiometer resistance from being at 0 o'clock, and it is excessive that the 6th resistance both end voltage simulates LOAD CELLS circuit output voltage, damages weighing instrument.
Circuit theory of the present invention is as follows:
1, as shown in Figure 2, according to the principle of resistance bridge, the output voltage at simulation LOAD CELLS circuit A, B two ends:
U
ab=U
i[R2/(R1+R2)-R3/(R3+ △ W1+R4)] (formula one)
Simulation LOAD CELLS output voltage simulates load cell signal output terminal SIG+, SIG-output voltage is the 6th resistance R 6 both end voltage U
r6, and U
r6=U
sIG+SIG-=U
ab-U
r5-U
△ W2(formula two)
In above formula: U
i---the confession bridge voltage of-LOAD CELLS, i.e. weighing instrument excitation anode EXC+ and excitation negative terminal EXC-put on the supply voltage in LOAD CELLS;
U
sIG+SIG-----simulation LOAD CELLS circuit output voltage;
U
r5----five resistance R 5 both end voltage;
U
△ W2---the-the second potentiometer W2 both end voltage;
△ W1----the first potentiometer W1 resistance.
2, take below 5V for bridge voltage be example, further illustrate principle of work of the present invention.
While adjusting the first potentiometer W1 potentiometer resistance and be zero, bridge balance, the output voltage U at simulation LOAD CELLS circuit A, B two ends
abfor 0mV, now simulate LOAD CELLS output voltage U
r6voltage is also 0mV.
When adjusting the first potentiometer W1 resistance △ W1 and being 250 Ω, by formula one, can obtain U
abfor 735mV, adjust the second potentiometer W2 resistance △ W2 and adjust to while being 10430 Ω, simulation LOAD CELLS output voltage U
r6for 20mV.Certainly, when the first potentiometer W1 resistance △ W1 is 250 Ω, adjusts the second potentiometer W2 resistance △ W2 and progressively reduce, voltage U
r6can progressively raise, but when reality is used, can not use too high output voltage, while adjusting to 10430 Ω, be output as 20mV, enough offset negative sense drift.
Adjust the first potentiometer W1 resistance at 60 Ω, when adjusting the second potentiometer W2 resistance and being 16450 Ω, simulation LOAD CELLS output output voltage U
r6for 4mV.
From above potentiometer adjustment, can find out simulation LOAD CELLS output voltage U
r6can between 4 mV to 20 mV, regulate, this value range is enough to offset the negative sense output valve that the drift of LOAD CELLS negative sense produces, and can meet the use of general electronic scales.
Beneficial effect of the present invention is: can solve online the problem of LOAD CELLS negative sense drift, and without changing LOAD CELLS; Disposal route is effective fast, can farthest avoid impact to produce; Method is with low cost, easy to implement.
Accompanying drawing explanation
Fig. 1 is existing electronic scale weighing circuit theory diagrams;
Fig. 2 is that the present invention simulates LOAD CELLS circuit theory diagrams;
Fig. 3 is that the present invention simulates LOAD CELLS and weighing instrument access schematic diagram.
In figure, round dot indication circuit tie point.
Embodiment
As shown in Figure 2, a kind of simulation LOAD CELLS circuit that can solve online many LOAD CELLS output signal negative sense drifts, comprise by the first resistance R 1, the second resistance R 2, three brachium pontis that the 4th resistance R 4 forms respectively and the resistance bridge being formed by the 3rd resistance R 3 and the first potentiometer W1 another brachium pontis in series, between a pair of node of described resistance bridge, be in series with the 5th resistance R 5, the second potentiometer W2 and the 6th resistance R 6, another of described resistance bridge forms respectively excitation anode EXC+ and excitation negative terminal EXC-to node, the two ends of described the 6th resistance R 6 form respectively signal output plus terminal SIG+ and signal output negative terminal SIG-.
And the first resistance R 1 is 300 Ω to the 6th resistance R 6 resistances, and the Standard resistance range of the first potentiometer W1 is 0-250 Ω, and the Standard resistance range of the second potentiometer W2 is 0-20k Ω.
It is example that the maximum of take is below weighed as 180t static electronic scale (using 8 50t LOAD CELLS), further illustrates and utilizes foregoing circuit to solve the method for many LOAD CELLS output signal negative sense drifts.This electronic scale weighing sensor is 5V for bridge voltage, under normal immunization with gD DNA vaccine, the total output voltage values of LOAD CELLS be 3.70mV(because there being scale pan effect of weight, during without the scale pan, be 0 mV); Under multiple factors impact, there is negative sense drift in LOAD CELLS total output signal, total be specially-0.50mV of output voltage values, and solution process is as follows:
(1), under electronic scales immunization with gD DNA vaccine, as shown in Figure 3, the signal output plus terminal of simulation LOAD CELLS circuit, signal output negative terminal, excitation anode are connected respectively with the corresponding port of weighing instrument with excitation negative terminal;
(2) coarse adjustment: according to the negative voltage value of the total output of LOAD CELLS, regulating the first potentiometer W1 resistance is 60 Ω, according to formula one, can make to simulate LOAD CELLS circuit A, B two ends obtain a forward voltage 227mV, thereby make to simulate LOAD CELLS circuit and export a forward voltage values, offset with the negative voltage value of LOAD CELLS output;
(3) accurate adjustment: regulate the second potentiometer W2 resistance, make the voltage output value of simulating LOAD CELLS circuit do slightly to change, while being 15630 Ω to the second potentiometer W2 resistance, at U
sIG+SIG-two ends obtain the voltage of 4.2 mV, and the voltage input value of weighing instrument reaches normal value 4.2-0.50mV=3.70 mV.
Claims (4)
1. one kind can solve the simulation LOAD CELLS circuit that many LOAD CELLS output signal negative senses drift about online, it is characterized in that, comprise by the first resistance (R1), the second resistance (R2), three brachium pontis that the 4th resistance (R4) forms respectively and the resistance bridge being formed by the 3rd resistance (R3) and the first potentiometer (W1) another brachium pontis in series, between a pair of node of described resistance bridge, be in series with the second potentiometer (W2) and the 6th resistance (R6), another of described resistance bridge forms respectively excitation anode (EXC+) and excitation negative terminal (EXC-) to node, the two ends of described the 6th resistance (R6) form respectively signal output plus terminal (SIG+) and signal output negative terminal (SIG-).
2. a kind of simulation LOAD CELLS circuit that can solve online many LOAD CELLS output signal negative sense drifts according to claim 1, is characterized in that, described the second potentiometer (W2) and the 6th resistance (R6) are also in series with the 5th resistance (R5).
3. a kind of simulation LOAD CELLS circuit that can solve online the drift of many LOAD CELLS output signal negative senses according to claim 2, it is characterized in that, the resistance of described the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5) and the 6th resistance (R6) is 300 Ω, the Standard resistance range of the first potentiometer (W1) is 0-250 Ω, and the Standard resistance range of the second potentiometer (W2) is 0-20k Ω.
4. utilize described in claim 1 and simulate the method that LOAD CELLS circuit solves many LOAD CELLS output signal negative senses drifts, it is characterized in that, comprise the steps:
(1), under electronic scales immunization with gD DNA vaccine, the signal output plus terminal (SIG+) of described simulation LOAD CELLS circuit, signal output negative terminal (SIG-), excitation anode (EXC+) are connected respectively with the corresponding port of weighing instrument with excitation negative terminal (EXC-);
(2) coarse adjustment: according to the negative voltage value of the total output of LOAD CELLS, regulate the resistance of the first potentiometer (W1), make to simulate LOAD CELLS circuit and export a forward voltage values, offset or make total input voltage value of weighing instrument to increase to forward voltage values with the negative voltage value of LOAD CELLS output;
(3) accurate adjustment: regulate the second potentiometer W2 resistance, make the voltage output value of simulating LOAD CELLS circuit do to change among a small circle, finally make total input voltage value of weighing instrument reach normal value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310475110.9A CN103575376B (en) | 2013-10-12 | 2013-10-12 | A kind of circuit and method for solving many LOAD CELLS output signal negative sense drifts online |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310475110.9A CN103575376B (en) | 2013-10-12 | 2013-10-12 | A kind of circuit and method for solving many LOAD CELLS output signal negative sense drifts online |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103575376A true CN103575376A (en) | 2014-02-12 |
| CN103575376B CN103575376B (en) | 2017-04-05 |
Family
ID=50047651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310475110.9A Active CN103575376B (en) | 2013-10-12 | 2013-10-12 | A kind of circuit and method for solving many LOAD CELLS output signal negative sense drifts online |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103575376B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067096A (en) * | 2015-07-28 | 2015-11-18 | 本钢板材股份有限公司 | Portable hopper scale operator simulation calibrator and calibration method |
| CN105157809A (en) * | 2015-05-25 | 2015-12-16 | 平顶山电子衡器制造有限公司 | Universal weighing signal generator |
| CN106802170A (en) * | 2016-12-30 | 2017-06-06 | 北京七星华创电子股份有限公司 | Flow sensor, mass flow conveying measure and control device and its temperature drift suppressing method |
| CN107063523A (en) * | 2016-02-11 | 2017-08-18 | 摩巴自动控制股份有限公司 | Electronic circuit, measuring cell, load detecting equipment and the vehicle including it |
| CN109741524A (en) * | 2018-12-29 | 2019-05-10 | 北京沃东天骏信息技术有限公司 | Goods selling equipment, the recognition methods of article, device and computer readable storage medium |
| 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 |
| CN114812915A (en) * | 2022-06-24 | 2022-07-29 | 中国空气动力研究与发展中心低速空气动力研究所 | Pressure scanning valve circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1093760A (en) * | 1965-11-11 | 1967-12-06 | Siemens Ag | Improvements in or relating to electric measuring devices |
| US3847017A (en) * | 1972-03-20 | 1974-11-12 | Welwyn Electric Ltd | Strain measuring system |
| CN2236649Y (en) * | 1995-04-25 | 1996-10-02 | 平志年 | Temperature and level monitoring alarm of solar water heater |
| CN201177531Y (en) * | 2008-04-08 | 2009-01-07 | 上海梅山钢铁股份有限公司 | Electric resistance strain type weighing sensor simulator |
| CN101476930A (en) * | 2009-01-16 | 2009-07-08 | 上海第二工业大学 | Special batching electronic scale for iron alloy electric furnace |
| CN203551091U (en) * | 2013-10-12 | 2014-04-16 | 酒泉钢铁(集团)有限责任公司 | Circuit solving negative shifts of output signals of multiple weighing sensors on line |
-
2013
- 2013-10-12 CN CN201310475110.9A patent/CN103575376B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1093760A (en) * | 1965-11-11 | 1967-12-06 | Siemens Ag | Improvements in or relating to electric measuring devices |
| US3847017A (en) * | 1972-03-20 | 1974-11-12 | Welwyn Electric Ltd | Strain measuring system |
| CN2236649Y (en) * | 1995-04-25 | 1996-10-02 | 平志年 | Temperature and level monitoring alarm of solar water heater |
| CN201177531Y (en) * | 2008-04-08 | 2009-01-07 | 上海梅山钢铁股份有限公司 | Electric resistance strain type weighing sensor simulator |
| CN101476930A (en) * | 2009-01-16 | 2009-07-08 | 上海第二工业大学 | Special batching electronic scale for iron alloy electric furnace |
| CN203551091U (en) * | 2013-10-12 | 2014-04-16 | 酒泉钢铁(集团)有限责任公司 | Circuit solving negative shifts of output signals of multiple weighing sensors on line |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157809A (en) * | 2015-05-25 | 2015-12-16 | 平顶山电子衡器制造有限公司 | Universal weighing signal generator |
| CN105067096A (en) * | 2015-07-28 | 2015-11-18 | 本钢板材股份有限公司 | Portable hopper scale operator simulation calibrator and calibration method |
| CN107063523A (en) * | 2016-02-11 | 2017-08-18 | 摩巴自动控制股份有限公司 | Electronic circuit, measuring cell, load detecting equipment and the vehicle including it |
| US10495529B2 (en) | 2016-02-11 | 2019-12-03 | Moba Mobile Automation Ag | Electrical full bridge strain gauge circuit, load cell, and load detection device for use in lifting platforms, trucks, and other machines |
| CN106802170A (en) * | 2016-12-30 | 2017-06-06 | 北京七星华创电子股份有限公司 | Flow sensor, mass flow conveying measure and control device and its temperature drift suppressing method |
| CN106802170B (en) * | 2016-12-30 | 2019-07-19 | 北京七星华创流量计有限公司 | Flow sensor, mass flow conveying measure and control device and its temperature drift suppressing method |
| 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 |
| CN109741524A (en) * | 2018-12-29 | 2019-05-10 | 北京沃东天骏信息技术有限公司 | Goods selling equipment, the recognition methods of article, device and computer readable storage medium |
| CN114812915A (en) * | 2022-06-24 | 2022-07-29 | 中国空气动力研究与发展中心低速空气动力研究所 | Pressure scanning valve circuit |
| CN114812915B (en) * | 2022-06-24 | 2022-10-18 | 中国空气动力研究与发展中心低速空气动力研究所 | Pressure scanning valve circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103575376B (en) | 2017-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103575376A (en) | Circuit and method for solving negative-going drifting of output signals of multiple weighing sensors in on-line mode | |
| CN103048085B (en) | Temperature compensation system for pressure sensors and temperature compensation thereof | |
| CN202229863U (en) | Compensation circuit of pressure sensor | |
| CN104374453A (en) | Multichannel digitized intelligent unbalance loading error correcting and weighing sensor and weighing method thereof | |
| CN102252788B (en) | Compensation circuit for pressure sensor | |
| CN201562016U (en) | Explosion-preventing resistance measuring instrument | |
| CN201177531Y (en) | Electric resistance strain type weighing sensor simulator | |
| CN104458121A (en) | Silicon pressure sensor temperature excursion compensating circuit and circuit establishing method | |
| CN203551091U (en) | Circuit solving negative shifts of output signals of multiple weighing sensors on line | |
| CN105528000A (en) | Intelligent temperature control meter for aircraft | |
| CN106768523A (en) | A kind of press tonnage measuring method and its device | |
| CN101339815B (en) | Process checking gauge and design method thereof | |
| CN102788659A (en) | Temperature compensation parameter self operation method of digital pressure gauge | |
| CN105004927A (en) | Bridge resistor and application thereof | |
| CN202305101U (en) | Temperature compensation system for pressure sensors | |
| CN203630655U (en) | Wheatstone bridge device | |
| CN204241078U (en) | Multichannel digital uneven loading error intelligence revises single beam type LOAD CELLS | |
| CN201281609Y (en) | Process check meter | |
| CN204679348U (en) | A kind of self-induction type young modulus measuring device | |
| CN203163841U (en) | A resistance strain weighing sensor simulator | |
| CN103308070A (en) | Connected liquid level type water level checking method | |
| CN207231625U (en) | Weighing sensor | |
| CN103066926A (en) | Automatic digital zeroing circuit for integral circuit | |
| CN202710743U (en) | PT load measurement control circuit of remote online electric energy meter calibration system | |
| CN202255709U (en) | Six-dimensional force sensor signal converting circuit based on constant current source power supply mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |