CN1399122A - Tecomperature compensation method for strain-type weighing sensor - Google Patents
Tecomperature compensation method for strain-type weighing sensor Download PDFInfo
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- CN1399122A CN1399122A CN 01115172 CN01115172A CN1399122A CN 1399122 A CN1399122 A CN 1399122A CN 01115172 CN01115172 CN 01115172 CN 01115172 A CN01115172 A CN 01115172A CN 1399122 A CN1399122 A CN 1399122A
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Abstract
The present invention relates to a temperature compensation method for strain-type weighing sensor. Inside or near the weighing sensor, a temperature sensor is installed, the temperature sensor is calibrated in zero point temperature-zero point output and temperature-elastic modulus, and zero point temperature-zero point output curve and temperature-elastic modulus curve are created in the weighing display. The operation includes first zero point temperature compensation based on the zero point temperature-zero point output curve in the weighing display, the elastic modulus compensation based on the temperature-elastic modulus curve, and final converting the measured weight into true weight based on the weight reference calibration value in the weighing sensor.
Description
Technical field
The present invention relates to temperature compensation, particularly relate to a kind of method of electronic scale being carried out temperature compensation weighing apparatus.
Background technology
As everyone knows, with the strain ga(u)ge that sticks on the flexible member strain regions,, form whiston bridge circuit by relative arm identical, the alternate arm opposite principle of should changing direction of should changing direction, be the initial circuit of LOAD CELLS, just formed an operable LOAD CELLS.Though this sensor can use, but because the inherent various influence factors and the influence of external environment condition, its output characteristics will depart from desirable output characteristics significantly, and main performance index is all relatively poor, does not reach the technical requirement of pin-point accuracy LOAD CELLS.In order to improve the integrated performance index of LOAD CELLS, just must take various indemnifying measures, two compensation relevant with temperature are output compensation at zero point, elastic modulus compensation in it.Conventional compensation method is to adopt circuit compensation, promptly find out the little brachium pontis of temperature-coefficient of electrical resistance in the bridge diagram, seal in the zero temperature compensation resistance that temperature-coefficient of electrical resistance is bigger thereon, carry out zero temperature compensation: supplying in the bridge loop of electric bridge, be connected in series an elastic modulus compensating resistance that varies with temperature and change, carry out the elastic modulus compensation.This kind compensation method can only compensate single sensor, and empirical very strong, has only through repeatedly adjusting repeatedly, could satisfy the less area of day and night temperature substantially and use.In actual applications since each in season the environment temperature difference, adopt the electronic scale of strain gauge transducer overproof serious in a large number, must demarcate again could acclimatization variation.For day and night temperature variation area greatly, adopt the electronic scale of strain gauge load cell almost can't use out of doors.Adopt the key issue of circuit compensation poor effect to be: can not find a kind of material or different materials, it can be offset fully in whole range of temperature because the weighing error that temperature variation causes weighing apparatus.
Summary of the invention
In order to overcome the problems referred to above, the invention provides a kind of method that strain gauge load cell is carried out temperature compensation, adopt this method need not change and can accurately carry out temperature compensation strain gauge transducer for the bridge loop.
For this reason, the technical solution used in the present invention is: a kind of method of strain gauge load cell being carried out temperature compensation, a temperature sensor is installed in place in the inner or close LOAD CELLS of LOAD CELLS, and carry out zero temperature-zero point and export, temperature-elastic modulus is demarcated, generate zero temperature-zero point curve of output and temperature-elastic modulus change curve by weight display, the scale body portion is when passing to weight display with weight signal during work, also temperature signal is passed to weight display, weight display at first carries out zero temperature compensation according to zero temperature-zero point curve of output, it is the zero temperature output valve that current weight signal value subtracts the Current Temperatures correspondence, the weight signal value that must make new advances, and then carry out elastic modulus compensation according to temperature-elastic modulus change curve, be that the new weight signal elastic modulus penalty coefficient with the Current Temperatures correspondence on duty obtains the actual weight signal value, last weight display is converted into actual weight according to the weight basis calibration value with the actual weight signal.
Adopt compensation method provided by the invention that following advantage is arranged:
(1) carry out zero temperature compensation with conventional method and need carry out repeatedly heating-cooling repeatedly and just can compensate to better value, and with this method secondary heating and cooling process just can compensate quite accurate; (2) the conventional method zero temperature compensation only compensates on three points, and can compensate by multiple spot with our rule, adds repeatedly interpolation, almost be have a few and compensate; (3) conventional method needs to carry out multiple welding to balancing circuitry, has reduced the reliability of components and parts, gets final product and once weld with our rule; (4) compensate underproof sensor for output of factory inspection zero temperature or elastic modulus, conventional method is to take sensor apart to carry out paster, compensation again, gets final product and adopt this method to test again; When (5) sensor being carried out the elastic modulus compensation,, destroyed the intrinsic linearity of sensor because the nickel sheet is non-linear with the nickel sheet.There is not this problem in we's rule; (6) adopt this method to carry out the electronic scale of zero temperature and elastic modulus compensation, can adapt to the bigger work of day and night temperature, as the northeast of China, ground such as northwest.In addition, because all staking-out works are undertaken by weight display, will be to reduce production costs so adopt the microcomputer network technology to produce in enormous quantities, the optimal selection of improving the quality of products.This compensation method has not only solved the influence of temperature to LOAD CELLS, has also solved the influence of temperature to other parts of weighing apparatus simultaneously.The electronic scale of demarcating out by this method can be issued to OIML in wide temperature
The level requirement.
Embodiment
A temperature sensor is installed in place in the inner or close LOAD CELLS of LOAD CELLS, and carry out zero temperature-zero point and export, temperature-elastic modulus is demarcated, generate zero temperature-zero point curve of output and temperature-elastic modulus change curve by weight display, the scale body portion is when passing to weight display with weight signal during work, also temperature signal is passed to weight display, weight display at first carries out zero temperature compensation according to zero temperature-zero point curve of output, it is the zero temperature output valve that current weight signal value subtracts the Current Temperatures correspondence, the weight signal value that must make new advances, and then carry out elastic modulus compensation according to temperature-elastic modulus change curve, be that the new weight signal elastic modulus penalty coefficient with the Current Temperatures correspondence on duty obtains the actual weight signal value, last weight display is converted into actual weight according to the weight basis calibration value with the actual weight signal.
The scaling method of above-mentioned zero temperature-output at zero point, temperature-elastic modulus is:
1, will not carry out temperature compensation but all satisfactory LOAD CELLS of other index is installed in the scale body, a temperature sensor will be installed simultaneously.
2, prepare a weight display of selling with the outfit of scale body.
3, the scale body is placed in the constant temperature oven, at-20 ℃ ,-10 ℃, 0 ℃, 10 ℃, 20 ℃, 30 ℃, 40 ℃, 50 ℃, 60 ℃ the scale body is carried out zero temperature output and demarcate, weight display is 9 temperature values and weight signal output valve and generate a zero temperature-zero point curve of output automatically according to quadratic interpolattion or other digital processing methods thus.After carrying out the zero temperature demarcation, the unloaded demonstration of weight display is no longer influenced by ambient temperature.
4, measure of the fully loaded output of scale body respectively at-20 ℃, 20 ℃, 40 ℃, 60 ℃ four temperature spot upper sensors, the output valve of the output valve of-20 ℃, 40 ℃, 60 ℃ three temperature spots being removed 20 ℃ of temperature spots respectively draws the coefficient 1 that three coefficients add 20 ℃ of temperature spots, totally four penalty coefficients, weight display are four penalty coefficients and generate temperature-elastic modulus change curve according to quadratic interpolattion or other digital processing methods thus.After carrying out the elastic modulus demarcation, the fully loaded demonstration of weight display is no longer influenced by ambient temperature.
5, be converted to 20 ℃ at normal temperatures to the demarcation of weighing of this weighing apparatus, and with calibration value, this calibration value as the fiducial mark definite value, promptly is equivalent to 20 ℃ of normal temperature this weighing apparatus be advanced to demarcate (consistent with 20 ℃ of elastic modulus standard of compensation).
Selected and the compensation method of the selected and temperature range of said temperature point is irrelevant, temperature spot and temperature range selected is relevant with compensation precision with the serviceability temperature scope of this electronic scale, the serviceability temperature scope is wide more, and compensation precision is high more, and the temperature spot quantity of then choosing is also just many more.
Claims (4)
1, a kind of method of strain gauge load cell being carried out temperature compensation, it is characterized in that, a temperature sensor is installed in place in the inner or close LOAD CELLS of LOAD CELLS, and carry out zero temperature-zero point and export, temperature-elastic modulus is demarcated, generate zero temperature-zero point curve of output and temperature-elastic modulus change curve by weight display, the scale body portion is when passing to weight display with weight signal during work, also temperature signal is passed to weight display, weight display at first carries out zero temperature compensation according to zero temperature-zero point curve of output, it is the zero temperature output valve that current weight signal value subtracts the Current Temperatures correspondence, the weight signal value that must make new advances, and then carry out elastic modulus compensation according to temperature-elastic modulus change curve, be that the new weight signal elastic modulus penalty coefficient with the Current Temperatures correspondence on duty obtains the actual weight signal value, last weight display is converted into actual weight according to the weight basis calibration value with the actual weight signal.
2, the method for claim 1 is characterized in that, the scaling method of described zero temperature-zero point output is: will not carry out temperature compensation but all satisfactory LOAD CELLS of other index is installed in the scale body, simultaneously an installation-temperature sensor; Prepare a weight display of selling with the outfit of scale body, the scale body is placed in the constant temperature oven, under-20 ℃ ,-10 ℃, 0 ℃, 10 ℃, 20 ℃, 30 ℃, 40 ℃, 50 ℃, 60 ℃ temperature the scale body is carried out zero temperature output and demarcate, weight display 9 temperature values and weight signal output valve thus generates a zero temperature-zero point curve of output automatically.
3, the method for claim 1, it is characterized in that, the scaling method of temperature-elastic modulus is: measure the fully loaded output of scale body at-20 ℃, 20 ℃, 40 ℃, 60 ℃ four temperature spot upper sensors respectively, the output valve of the output valve of-20 ℃, 40 ℃, 60 ℃ three temperature spots being removed 20 ℃ of temperature spots respectively draws three coefficients, coefficient 1 together with 20 ℃ of temperature spots, totally four penalty coefficients, weight display four penalty coefficients thus generate temperature-elastic modulus change curves.
4, method as claimed in claim 1 is characterized in that, is converted to 20 ℃ at normal temperatures to the weighing apparatus demarcation of weighing, and with calibration value, with this calibration value as the weight basis calibration value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115172 CN1399122A (en) | 2001-07-25 | 2001-07-25 | Tecomperature compensation method for strain-type weighing sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115172 CN1399122A (en) | 2001-07-25 | 2001-07-25 | Tecomperature compensation method for strain-type weighing sensor |
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| CN1399122A true CN1399122A (en) | 2003-02-26 |
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| CN 01115172 Pending CN1399122A (en) | 2001-07-25 | 2001-07-25 | Tecomperature compensation method for strain-type weighing sensor |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095837A (en) * | 2010-12-15 | 2011-06-15 | 山西太钢不锈钢股份有限公司 | Method for field calibration of online water-quality analyzing instrument for sewage treatment |
| CN102353439A (en) * | 2011-07-04 | 2012-02-15 | 宁波柯力电气制造有限公司 | Digital module with temperature compensating function and temperature compensating method thereof |
| CN105675184A (en) * | 2016-02-19 | 2016-06-15 | 沈阳埃克斯邦科技有限公司 | Compensation method for zero point temperature drift of silicon strain gage bridge circuit |
| CN106382977A (en) * | 2016-11-03 | 2017-02-08 | 福建省计量科学研究院 | Temperature compensating method for improving truck scale accuracy |
| CN106595819A (en) * | 2017-01-18 | 2017-04-26 | 郑州迪生仪器仪表有限公司 | Continuous baby weighing method of baby incubator |
| CN106595832A (en) * | 2016-12-07 | 2017-04-26 | 锐马（福建）电气制造有限公司 | Weighing sensor zero drift compensation workbench |
| CN106679777A (en) * | 2017-01-04 | 2017-05-17 | 承德石油高等专科学校 | Electronic scale temperature compensation device and compensation method thereof |
| CN108332837A (en) * | 2017-12-06 | 2018-07-27 | 芯海科技（深圳）股份有限公司 | It is a kind of applied to electronic scale based on BP neural network compensation temperature gain method |
| CN109459066A (en) * | 2018-12-29 | 2019-03-12 | 中航电测仪器股份有限公司 | A kind of method of sensor compensation |
| CN113588063A (en) * | 2021-07-28 | 2021-11-02 | 天津市府易科技股份有限公司 | Detection system of going out based on living body gravity induction and edge intelligent recognition technology |
| CN113899438A (en) * | 2021-10-28 | 2022-01-07 | 深圳市道中创新科技有限公司 | Temperature compensation method of gravity sensor |
-
2001
- 2001-07-25 CN CN 01115172 patent/CN1399122A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095837A (en) * | 2010-12-15 | 2011-06-15 | 山西太钢不锈钢股份有限公司 | Method for field calibration of online water-quality analyzing instrument for sewage treatment |
| CN102353439A (en) * | 2011-07-04 | 2012-02-15 | 宁波柯力电气制造有限公司 | Digital module with temperature compensating function and temperature compensating method thereof |
| CN105675184A (en) * | 2016-02-19 | 2016-06-15 | 沈阳埃克斯邦科技有限公司 | Compensation method for zero point temperature drift of silicon strain gage bridge circuit |
| CN106382977B (en) * | 2016-11-03 | 2018-10-23 | 福建省计量科学研究院 | A kind of temperature-compensation method improving truck scale accuracy |
| CN106382977A (en) * | 2016-11-03 | 2017-02-08 | 福建省计量科学研究院 | Temperature compensating method for improving truck scale accuracy |
| CN106595832B (en) * | 2016-12-07 | 2023-05-02 | 锐马（福建）电气制造有限公司 | Zero drift compensation workbench of weighing sensor |
| CN106595832A (en) * | 2016-12-07 | 2017-04-26 | 锐马（福建）电气制造有限公司 | Weighing sensor zero drift compensation workbench |
| CN106679777A (en) * | 2017-01-04 | 2017-05-17 | 承德石油高等专科学校 | Electronic scale temperature compensation device and compensation method thereof |
| CN106595819B (en) * | 2017-01-18 | 2019-01-29 | 郑州迪生仪器仪表有限公司 | Infant incubator baby's continuous weighting method |
| CN106595819A (en) * | 2017-01-18 | 2017-04-26 | 郑州迪生仪器仪表有限公司 | Continuous baby weighing method of baby incubator |
| CN108332837A (en) * | 2017-12-06 | 2018-07-27 | 芯海科技（深圳）股份有限公司 | It is a kind of applied to electronic scale based on BP neural network compensation temperature gain method |
| CN109459066A (en) * | 2018-12-29 | 2019-03-12 | 中航电测仪器股份有限公司 | A kind of method of sensor compensation |
| CN113588063A (en) * | 2021-07-28 | 2021-11-02 | 天津市府易科技股份有限公司 | Detection system of going out based on living body gravity induction and edge intelligent recognition technology |
| CN113899438A (en) * | 2021-10-28 | 2022-01-07 | 深圳市道中创新科技有限公司 | Temperature compensation method of gravity sensor |
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