CN104374453A - Multichannel digitized intelligent unbalance loading error correcting and weighing sensor and weighing method thereof - Google Patents
Multichannel digitized intelligent unbalance loading error correcting and weighing sensor and weighing method thereof Download PDFInfo
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- CN104374453A CN104374453A CN201410722524.1A CN201410722524A CN104374453A CN 104374453 A CN104374453 A CN 104374453A CN 201410722524 A CN201410722524 A CN 201410722524A CN 104374453 A CN104374453 A CN 104374453A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
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Abstract
The invention relates to a multichannel digitized intelligent unbalance loading error correcting and weighing sensor and a weighing method thereof and belongs to the technical field of sensor structures. The multichannel digitized intelligent unbalance loading error correcting and weighing sensor comprises an elastic body which is composed of a cross beam in the middle, a left fixing portion and a right fixing portion, the left fixing portion and the right fixing portion are positioned at two ends of the elastic body, a mounting hole is formed in the left fixing portion, a mounting hole is formed in the lower surface of the right fixing portion, a groove used for placement of a circuit board is formed in the upper surface of the right fixing portion, multiple through holes penetrating the cross beam are formed inside the cross beam, positions, corresponding to the through holes, on the upper surface and the lower surface of the cross beam are strain areas, two resistance strain devices are arranged on each of the upper surface and the lower surface of the cross beam, each resistance strain device is composed of four resistance strain meters, the four resistance strain devices are welded with the circuit board through leads, the circuit board is in communication connection with an external display unit, and an anticorrosion processing layer coats each of the upper surface and the lower surface of the cross beam and the outer surface of the groove. The multichannel digitized intelligent unbalance loading error correcting and weighing sensor is needless of filing and adjusting, convenient to operate, time saving, labor saving and high in measuring accuracy.
Description
Technical field
The present invention relates to a kind of multichannel digital uneven loading error intelligence and revise LOAD CELLS and weighing technique thereof, belong to sensor construction technical field.
Background technology
First, traditional single-point resistance strain weighing transducer has stronger offset load resistance in theory, but due to error, the deviation of patch location and the unevenness of strain ga(u)ge self material etc. reason that machining produces, everything all can cause single-point resistance strain weighing transducer to there is serious uneven loading error, must give correction for this reason and can be applied in electronic scales.The method of current correction installs on test platform by LOAD CELLS, and the center of platform and four angles apply the load of 1/3 range successively, according to the size that it exports, frustrates repair different positions to revise with file.And when sensor installs on weighing platform, due to the difference of the rigidity of weighing platform, installed surface is different, the difference of assembling moment, also needs secondary refine.This wastes time and energy for high-precision LOAD CELLS very much, and is difficult to reach the requirement of secondary scale to uneven loading error.And LOAD CELLS is after carrying out uneven loading error correction, destroy original preservative treatment layer, also need to re-start protective treatment, and protection effect is difficult to reach previous level.
Moreover resistance strain weighing transducers all at present all exists certain measuring error, the reason of these errors is caused to have inside and outside.Wherein the impact of temperature is the most remarkable.It is by humid test that traditional temperature affects compensation of error, and the size exported according to temperature is welded the sensitivity amount of temperature compensation semifixed resistor of different resistance and intercepted that the enamel covered wire of different length compensates.The shortcoming done like this is the sensitivity amount of temperature compensation semifixed resistor that need prepare a large amount of different resistance, time-consuming, creates the temperature compensation of all analog or digital formulas for this reason, but substantially belonging to static temperature compensates;
Secondly, the accuracy of resistance strain weighing transducer is relevant with the load applied with the Cai Liao ﹑ temperature of sensor, and most of artifical resistance strain gauge load cell compensates to reach tolerance requirements by discrete component in adjustment mimic channel.Due to work quantitative limitation needed for the franchise of circuit component, limited range and compensation, and higher accuracy cannot be reached.
Summary of the invention
The object of the invention is to solve need that above-mentioned prior art exists adopt and frustrate the mode of repairing and carry out weighing precision adjustment, waste time and energy, destroy the preservative treatment layer of LOAD CELLS outside, reduce protection effect, and temperature control compensating resistance need be used, temperature compensating resistance at zero point, offset output compensating resistance carries out temperature control, temperature offset output, the compensation of offset output, the technical matters that time-consuming and precision is low, there is provided a kind of without the need to frustrate trim whole, easy to operate, saving of work and time, measuring accuracy much higher passage digitizing uneven loading error intelligence revises LOAD CELLS.
Multichannel digital uneven loading error intelligence revises LOAD CELLS, its special character is to comprise the elastic body 1 be made up of aluminum alloy materials, the crossbeam 2 of elastic body 1 by centre and the left fixed part 3 at two ends, right fixed part 4 is formed, two fixed parts and crossbeam 2 are structure as a whole, left fixed part 3 is formed with mounting hole 5, the lower surface of right fixed part 4 is provided with mounting hole 5, the upper surface of right fixed part 4 is provided with the groove 12 for placing wiring board 6, the inside of crossbeam 2 is provided with multiple through hole 7 running through crossbeam 2, crossbeam 2 upper, the position of the corresponding through hole 7 of lower surface is strain regions, crossbeam 2 upper, lower surface is respectively equipped with two groups of resistance-strain devices, often organize resistance-strain device to form by four strain ga(u)ges, four groups of resistance-strain devices are welded with wiring board 6 mutually by wire, wiring board 6 is connected with outernal display unit 13 communication, crossbeam 2 upper, the outside surface of lower two surfaces and groove 12 is all coated with preservative treatment layer,
The transverse section of described through hole 7 is petal-shaped, crossbeam 2 upper, the position of the corresponding petal-shaped through hole 7 of lower surface is strain regions, the limit of petal-shaped through hole 7 is by identical semicircle I 7-1 of four diameters, semicircle II 7-2, semicircle III 7-3, semicircle IV 7-4 forms, crossbeam 2 upper, lower surface is respectively equipped with two groups of resistance-strain devices, the installation site of two groups of resistance-strain devices of upper surface and semicircle I 7-1 of two petal-shaped through holes 7, the position of semicircle II 7-2 is corresponding, the installation site of two groups of resistance-strain devices of lower surface and semicircle III 7-3 of two petal-shaped through holes 7, the position of semicircle IV 7-4 is corresponding,
Rounded or the square in the transverse section of described through hole 7 or ellipse, the position of the corresponding manhole 7 in upper and lower surface of crossbeam 2 is strain regions, the upper and lower surface of crossbeam 2 is respectively equipped with two groups of resistance-strain devices, and the position of the manhole 7 that the installation site of resistance-strain device is adjacent with two is corresponding;
Described resistance-strain device is made up of four strain ga(u)ges 8 arranged in matts shape, and strain ga(u)ge 8 is connected by wire successively, forms Wheatstone bridge;
Described wiring board 6 is provided with single-chip microcomputer 9 and power circuit, single-chip microcomputer 9 is connected with temperature measuring circuit 15, the input end of single-chip microcomputer 9 is also connected with four A/D converters 10, input end and the resistance of A/D converter 10 answer device to be connected by wire, and A/D converter 10 and resistance are answered between device and is also provided with filtering circuit 11;
Described left fixed part 3 is connected with the scale pan, and right fixed part 4 is connected with base;
The width of described crossbeam 2 is 30 millimeters, and strain ga(u)ge 8 is affixed on crossbeam 2 upper surface or lower surface apart from neutral line 5.36mm place;
Described right fixed part 4 offers for through the through hole 13 of wire, a sidewall of groove 12 is provided with for portalling 14 through cable;
Described wiring board 6 is connected with outernal display unit communication by cable.
Multichannel digital uneven loading error intelligence revises the Weighing method of LOAD CELLS, and its special character is to comprise the following steps:
1), by load be applied on elastic body 1, make upper and lower four strain regions of elastic body 1 all produce the elasticity of flexure deformation proportional with magnitude of load;
2) Wheatstone bridge, by applying driving voltage converts the change of strain ga(u)ge 8 resistance in four groups of resistance-strain devices to voltage signal and exports;
3), the voltage signal of four groups of Wheatstone bridge outputs is by flowing to A/D converter 10 after filtering circuit 11 filter out noise, digital signal is sent to single-chip microcomputer 9 by A/D converter 10, can the temperature of Real-Time Monitoring elastic body 1 by temperature measuring circuit 15, and temperature information is sent to single-chip microcomputer 9;
4) the multichannel measurement data, received by single-chip microcomputer 9 pairs of step 3) process, and carry out digitized compensation calculating according to the temperature information collected;
5), by TXD and RXD asynchronous communication interface set on single-chip microcomputer 9, data are sent to outernal display unit 13 by cable.
Multichannel digital uneven loading error intelligence of the present invention revises LOAD CELLS, smart structural design, multiple through holes running through crossbeam set by the inside of crossbeam, on crossbeam, the lower surface position corresponding with through hole is strain regions, strain regions is installed resistance-strain device, resistance-strain device is connected with single-chip computer control system communication, therefore when load is applied on elastic body, on elastomeric, lower four strain regions all produce the elasticity of flexure deformation proportional with magnitude of load, convert the change of the strain ga(u)ge resistance in four groups of resistance-strain devices to voltage signal by the Wheatstone bridge applying driving voltage to export, single-chip computer control system processes received multichannel measurement data, and carry out digitized compensation calculating according to the temperature information collected, outernal display unit is sent data to finally by TXD and RXD asynchronous communication interface, said process achieves following advantage: 1, a single-point type LOAD CELLS need not be frustrated and repair, one-time detection just can complete the digital intelligent correction to uneven loading error, and correction precision improves greatly, 2 grades of scales can be met easily to the requirement of uneven loading error, 2, the voltage signal by exporting Wheatstone bridge carries out digitized processing, without temperature control compensating resistance, temperature control linearization adjustment and compensation rate semifixed resistor, temperature compensating resistance at zero point, offset output compensating resistance, the compensation of temperature control, temperature zero point, offset output can be completed, and compensation precision improves an order of magnitude, 2 grades of scales easily can be met to the requirement of temperature error, 3, the voltage signal by exporting Wheatstone bridge carries out digitized processing, achieves linear, the creep exported resistance strain weighing transducer, delayed digitizing correction, improves the accuracy class of resistance strain weighing transducer, 4, the online firmware upgrade of sensor is adopted, for product up-gradation and fault diagnosis provide conveniently, 5, adopt instruction type communications protocol, reduce data communication frequency, greatly reduce the power consumption of sensor.In sum, reasonable in design of the present invention, has good application prospect in weighing apparatus field.
Accompanying drawing explanation
Fig. 1: the multichannel digital uneven loading error intelligence of the embodiment of the present invention 1 revises the structural representation of LOAD CELLS;
The A-A of Fig. 2: Fig. 1 cuts open structural representation;
The A of Fig. 3: Fig. 1 is to structural representation;
Fig. 4: the multichannel digital uneven loading error intelligence of the embodiment of the present invention 1 revises elastomeric upper surface, the lower surface wiring schematic diagram of LOAD CELLS;
Fig. 5: the structural representation of the embodiment of the present invention 2;
Fig. 6: the structural representation of the embodiment of the present invention 3;
Fig. 7: the structural representation of the embodiment of the present invention 4;
Fig. 8: the present invention is located at the wiring diagram of first group of resistance-strain device of crossbeam 2 upper surface, filtering circuit, A/D change-over circuit;
Fig. 9: the present invention is located at the wiring diagram of second group of resistance-strain device of crossbeam 2 upper surface, filtering circuit, A/D change-over circuit;
Figure 10: the present invention is located at the wiring diagram of first group of strain device of crossbeam 2 lower surface, filtering circuit, A/D change-over circuit;
Figure 11: the present invention is located at the wiring diagram of second group of strain device of crossbeam 2 lower surface, filtering circuit, A/D change-over circuit.
Figure 12: the wiring diagram of single-chip microcomputer of the present invention, display unit, temperature measuring circuit;
Figure 13: the wiring diagram of power circuit of the present invention.
Embodiment
Provide the specific embodiment of the present invention below with reference to accompanying drawing, be used for that the present invention is described further.
Embodiment 1
The multichannel digital uneven loading error intelligence of the present embodiment revises LOAD CELLS, comprise the elastic body 1 be made up of aluminum alloy materials, the crossbeam 2 of elastic body 1 by centre and the left fixed part 3 at two ends, right fixed part 4 is formed, two fixed parts and crossbeam 2 are structure as a whole, left fixed part 3 is formed with mounting hole 5, the lower surface of right fixed part 4 is provided with mounting hole 5, the upper surface of right fixed part 4 is provided with the groove 12 for placing wiring board 6, the inside of crossbeam 2 is provided with the through hole 7 that two run through crossbeam 2, crossbeam 2 upper, the position of the corresponding through hole 7 of lower surface is strain regions, crossbeam 2 upper, lower surface is respectively equipped with two groups of resistance-strain devices, often organize resistance-strain device to form by four strain ga(u)ges, four groups of resistance-strain devices are welded with wiring board 6 mutually by wire, wiring board 6 is connected with outernal display unit 13 communication, crossbeam 2 upper, the outside surface of lower two surfaces and groove 12 is all coated with preservative treatment layer, the transverse section of through hole 7 is petal-shaped, crossbeam 2 upper, the position of the corresponding petal-shaped through hole 7 of lower surface is strain regions, the limit of petal-shaped through hole 7 is by identical semicircle I 7-1 of four diameters, semicircle II 7-2, semicircle III 7-3, semicircle IV 7-4 forms, crossbeam 2 upper, lower surface is respectively equipped with two groups of resistance-strain devices, the installation site of two groups of resistance-strain devices of upper surface and semicircle I 7-1 of two petal-shaped through holes 7, the position of semicircle II 7-2 is corresponding, the installation site of two groups of resistance-strain devices of lower surface and semicircle III 7-3 of two petal-shaped through holes 7, the position of semicircle IV 7-4 is corresponding.Resistance-strain device be by four in matts shape arrange strain ga(u)ges 8 form, wherein strain ga(u)ge 8 can select model to be BCF350-3AA(23) strain ga(u)ge, strain ga(u)ge 8 is connected by wire successively, formed Wheatstone bridge; Wiring board 6 is provided with single-chip microcomputer 9 and power circuit, single-chip microcomputer 9 is connected with temperature measuring circuit 15, the input end of single-chip microcomputer 9 is also connected with four A/D converters 10, input end and the resistance of A/D converter 10 answer device to be connected by wire, and A/D converter 10 and resistance are answered between device and is also provided with filtering circuit 11; Left fixed part 3 is connected with the scale pan, and right fixed part 4 is connected with base; The width of crossbeam 2 is 30 millimeters, and strain ga(u)ge 8 is affixed on crossbeam 2 upper surface or lower surface apart from neutral line 5.36mm place; Right fixed part 4 offers for the through hole 13 through wire, a sidewall of groove 12 is provided with for portalling through cable; Wiring board 6 is connected with outernal display unit communication by cable.
Multichannel digital uneven loading error intelligence revises the Weighing method of LOAD CELLS, comprises the following steps:
1), by load be applied on elastic body 1, make upper and lower four strain regions of elastic body 1 all produce the elasticity of flexure deformation proportional with magnitude of load;
2), calculated by mechanical analysis, according to the rule of its geometric distortion, adopt 8 ~ 16 diverse location adhering resistance strainometers (as 30 mm wide elastic bodys, strain ga(u)ge 8 is attached to distance neutral line 5.36mm place, strain regions), constitute multiple Wheatstone bridge (S1, S2, ... ..SN), see accompanying drawing 8-11, power to S1 for bridge voltage VCC, bridge road exports the simulating signal of a 0 ~ 6mV under force;
3), the voltage signal of four groups of Wheatstone bridge outputs passes through C1, C2, U2 high precision analogue A/D converter 10 is given after C3 filter out noise, data are sent to single-chip microcomputer 9 by SDO and SCLC two interfaces, in like manner S2, S3 ... measurement data is also sent to single-chip microcomputer 9 by .SN, and elastomeric temperature signal is given U1 by the temperature measuring circuit be made up of RT temperature sensor and R8;
4) the multichannel measurement data, received by single-chip microcomputer 9 pairs of step 3) process, and carry out digitized compensation calculating according to the temperature information collected;
5), by TXD and RXD asynchronous communication interface set on single-chip microcomputer 9, data are sent to outernal display unit 13 by cable.
Embodiment 2
The difference of the present embodiment and embodiment 1 is: the transverse section of through hole 7 is rounded, the position of the corresponding manhole 7 in upper and lower surface of crossbeam 2 is strain regions, the upper and lower surface of crossbeam 2 is respectively equipped with two groups of resistance-strain devices, and the position of the manhole 7 that the installation site of resistance-strain device is adjacent with two is corresponding.
Embodiment 3
The difference of the present embodiment and embodiment 1 is: the transverse section of described through hole 7 is square, the position of the corresponding manhole 7 in upper and lower surface of crossbeam 2 is strain regions, the upper and lower surface of crossbeam 2 is respectively equipped with two groups of resistance-strain devices, and the position of the manhole 7 that the installation site of resistance-strain device is adjacent with two is corresponding.
Embodiment 4
The difference of the present embodiment and embodiment 1 is: the transverse section ovalize of described through hole 7, the position of the corresponding manhole 7 in upper and lower surface of crossbeam 2 is strain regions, the upper and lower surface of crossbeam 2 is respectively equipped with two groups of resistance-strain devices, and the position of the manhole 7 that the installation site of resistance-strain device is adjacent with two is corresponding.
The key improving LOAD CELLS weighing precision reduces the impact of inside and outside factor.Reaching higher precision needs the process by being called compensation to carry out " adjustment " each LOAD CELLS.No matter the object compensated is temperature or load time, all obtain desirable linear relationship in the output of LOAD CELLS with suffered by it between load.Within the scope of specified carrying, when loading with known force, calculate the linear compensation factors along " expectation value " curve by the actual output quantity of sensor, thus reach desired result.The penalty coefficient used in digital compensation algorithm calculates by the actual output quantity of sensor.Digital compensation is under actual loaded condition, corrects realize the output of LOAD CELLS.
lag compensation:
Most of sensor can show and be referred to as delayed attribute.When imposed load unloads load more successively step by step, the output of sensor there will be delayed or is sometimes called the phenomenon of " interior friction ".In ideal conditions, identical load should be identical with reading during corresponding loading when unloading.But in fact difference can occur, this species diversity is just referred to as delayed.Delayed normally positive number, but also have some negative delayed phenomenons to occur.Can be quite large by the impact of delayed generation in resistance strain type sensor, the often overall accuracy of limiting device.The generation of hysteresis phenomenon mainly comes from material behavior and the geometric configuration of sensor.All materials with reacting force, no matter it is delayed to be that metal or glass/ceramic all show in various degree.The strain ga(u)ge of macromolecular material substrate also show delayed, and account for significant proportion in the overall hysteresis error of sensor.Lag compensation algorithm makes the output of LOAD CELLS closer to desirable straight line.The lag compensation coefficient used in digital compensation algorithm applies known force, by what calculate a series of gravimetric values of the actual output of sensor to sensor within the scope of specified carrying.This algorithm revises the output of LOAD CELLS according to actual loaded amount, and considers whether current heap(ed) capacity is greater than or less than previous heap(ed) capacity.When compression and decompression be complete in same step time, delayed makeover process can be quite simple.
sensitivity temperature compensation:
Temperature is the most significant external influence factors.The critical piece (elastic body and strain ga(u)ge) of LOAD CELLS is all manufactured by metal material.Along with the change of temperature, the change that the signal of LOAD CELLS can be caused to export of expanding with heat and contract with cold of metal.Under controlled conditions, temperature impact can measured out.Be constant due to temperature effect and repeatably, therefore can compensate.Obtain temperature compensation coefficient, need in whole temperature range build-in test LOAD CELLS and record data, adjusting the dependent deviation produced by temperature, to obtain expected result.Penalty coefficient is stored in the permanent storage of LOAD CELLS.
zero temperature compensation:
Offset output is that the sensor surveyed under zero load exports.The temperature compensation of offset output is realized by certain algorithm, and this algorithm makes sensor produce identical offset output at different temperatures.Zero compensation exports reading by the zero load surveyed in whole operating temperature range to determine.These readings of the penalty coefficient used in digital compensation algorithm calculate.This algorithm is the actual temperature according to LOAD CELLS, corrects its output.
creep compensation:
Creep be sensor when stand under load is constant, its change (increase or reduce) exporting in time and occur.Under loaded condition, along with the hardware of the continuity LOAD CELLS of time can produce lasting distortion.This lasting distortion can cause additional strain in sensor.Under controlled conditions, after loading, the impact of time can be out measured in this distortion.Because this impact is constant and repeatably, therefore can compensate.Creep compensation coefficient is within given time, LOAD CELLS is applied to identical power determines.The creep compensation coefficient used in digital compensation algorithm is by calculating these weight readings.This algorithm is according to actual loaded amount, and the time of loading revises the output of LOAD CELLS.
the correction of uneven loading error:
The diverse location that the error produced due to machining, the deviation of patch location and the reason of strain ga(u)ge self can cause load to be added to weighing platform is that sensor exports and produces error.This error is applied identical load successively by the position different to weighing platform and is recorded the output of each electric bridge of diverse location, by carrying out computing to the output data of different electric bridge, realize on a single-point type sensor without the correction of physical method to uneven loading error.The correction of this employing digitizing uneven loading error is one step completed after electronic scales assembling, thus saves a large amount of manpowers, and greatly improves production efficiency; Especially to using the elastic body of slice structure to greatly reduce elastomeric difficulty of processing, greatly reduce manufacturing cost.
The multichannel digital uneven loading error intelligence of above-described embodiment is revised LOAD CELLS and is had the following advantages:
1, achieve need not to frustrate in a single-point type LOAD CELLS and repair, one-time detection just can complete the digital intelligent correction to uneven loading error, and revises precision and greatly improve, and can meet 2 grades of scales easily to the requirement of uneven loading error.
2, the voltage signal by exporting Wheatstone bridge carries out digitized processing, without temperature control compensating resistance, temperature control linearization adjustment and compensation rate semifixed resistor, temperature compensating resistance at zero point, offset output compensating resistance, the compensation of temperature control, temperature zero point, offset output can be completed, and compensation precision improves an order of magnitude, 2 grades of scales easily can be met to the requirement of temperature error.
3, the voltage signal by exporting Wheatstone bridge carries out digitized processing, achieves linear, the creep exported resistance strain weighing transducer, delayed digitizing correction, improves the accuracy class of resistance strain weighing transducer.
4, the online firmware upgrade of sensor is adopted, for product up-gradation and fault diagnosis provide conveniently.
5, adopt instruction type communications protocol, reduce data communication frequency, greatly reduce the power consumption of sensor.
Claims (10)
1. multichannel digital uneven loading error intelligence revises LOAD CELLS, it is characterized in that comprising the elastic body (1) be made up of aluminum alloy materials, the crossbeam (2) of elastic body (1) by centre and the left fixed part (3) at two ends, right fixed part (4) is formed, two fixed parts and crossbeam (2) are structure as a whole, left fixed part (3) is formed with mounting hole (5), the lower surface of right fixed part (4) is provided with mounting hole (5), the upper surface of right fixed part (4) is provided with the groove (12) for placing wiring board (6), the inside of crossbeam (2) is provided with multiple through hole (7) running through crossbeam (2), crossbeam (2) upper, the position of the corresponding through hole (7) of lower surface is strain regions, crossbeam (2) upper, lower surface is respectively equipped with two groups of resistance-strain devices, often organize resistance-strain device to form by four strain ga(u)ges, four groups of resistance-strain devices are welded with wiring board (6) mutually by wire, wiring board (6) is connected with outernal display unit (13) communication, crossbeam (2) upper, the outside surface of lower two surfaces and groove (12) is all coated with preservative treatment layer.
2. revise LOAD CELLS according to multichannel digital uneven loading error intelligence according to claim 1, the transverse section that it is characterized in that described through hole (7) is petal-shaped, crossbeam (2) upper, the position of corresponding petal-shaped through hole (7) of lower surface is strain regions, the limit of petal-shaped through hole (7) is by the identical semicircle I (7-1) of four diameters, semicircle II (7-2), semicircle III (7-3), semicircle IV (7-4) forms, crossbeam (2) upper, lower surface is respectively equipped with two groups of resistance-strain devices, the installation site of two groups of resistance-strain devices of upper surface and the semicircle I (7-1) of two petal-shaped through holes (7), the position of semicircle II (7-2) is corresponding, the installation site of two groups of resistance-strain devices of lower surface and the semicircle III (7-3) of two petal-shaped through holes (7), the position of semicircle IV (7-4) is corresponding.
3. revise LOAD CELLS according to multichannel digital uneven loading error intelligence according to claim 1, it is characterized in that the rounded or square in the transverse section of described through hole (7) or ellipse, the position on the corresponding manhole in the upper and lower surface (7) of crossbeam (2) is strain regions, the upper and lower surface of crossbeam (2) is respectively equipped with two groups of resistance-strain devices, and the position of the manhole (7) that the installation site of resistance-strain device is adjacent with two is corresponding.
4. revise LOAD CELLS according to the multichannel digital uneven loading error intelligence described in the arbitrary claim of claim 1-3, it is characterized in that described resistance-strain device is made up of four strain ga(u)ges (8) arranged in matts shape, strain ga(u)ge (8) is connected by wire successively, forms Wheatstone bridge.
5. revise LOAD CELLS according to multichannel digital uneven loading error intelligence according to claim 4, it is characterized in that described wiring board (6) is provided with single-chip microcomputer (9) and power circuit, single-chip microcomputer (9) is connected with temperature measuring circuit (15), the input end of single-chip microcomputer (9) is also connected with four A/D converters (10), the input end of A/D converter (10) answers device to be connected by wire with resistance, and A/D converter (10) and resistance are answered between device and is also provided with filtering circuit (11).
6. revise LOAD CELLS according to the multichannel digital uneven loading error intelligence described in the arbitrary claim of claim 4, it is characterized in that described left fixed part (3) is connected with the scale pan, right fixed part (4) is connected with base.
7. revise LOAD CELLS according to the multichannel digital uneven loading error intelligence described in the arbitrary claim of claim 4, it is characterized in that the width of described crossbeam (2) is 30 millimeters, strain ga(u)ge (8) is affixed on crossbeam (2) upper surface or lower surface apart from neutral line 5.36mm place.
8. revise LOAD CELLS according to the multichannel digital uneven loading error intelligence described in the arbitrary claim of claim 4, it is characterized in that described right fixed part (4) offering the through hole (13) for through wire, a sidewall of groove (12) was provided with for portalling through cable.
9. revise LOAD CELLS according to the multichannel digital uneven loading error intelligence described in the arbitrary claim of claim 4, it is characterized in that described wiring board (6) is connected with outernal display unit communication by cable.
10. multichannel digital uneven loading error intelligence revises the Weighing method of LOAD CELLS, it is characterized in that comprising the following steps:
1), by load be applied on elastic body (1), make upper and lower four strain regions of elastic body (1) all produce the elasticity of flexure deformation proportional with magnitude of load;
2) Wheatstone bridge, by applying driving voltage converts the change of strain ga(u)ge (8) resistance in four groups of resistance-strain devices to voltage signal and exports;
3), the voltage signal of four groups of Wheatstone bridge outputs flows to A/D converter (10) by after filtering circuit (11) filter out noise, digital signal is sent to single-chip microcomputer (9) by A/D converter (10), can the temperature of Real-Time Monitoring elastic body (1) by temperature measuring circuit (15), and temperature information is sent to single-chip microcomputer (9);
4), single-chip microcomputer (9) processes the multichannel measurement data received by step 3), and carries out digitized compensation calculating according to the temperature information collected;
5), by single-chip microcomputer (9) upper set TXD and RXD asynchronous communication interface, data are sent to outernal display unit (13) by cable.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410722524.1A CN104374453B (en) | 2014-12-03 | 2014-12-03 | Intelligently amendment weighing sensor and its weighing technique of multichannel digital uneven loading error |
| PCT/CN2015/071801 WO2016086528A1 (en) | 2014-12-03 | 2015-01-29 | Multichannel digitalized intelligent correcting and weighing sensor for unbalanced load error and weighing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410722524.1A CN104374453B (en) | 2014-12-03 | 2014-12-03 | Intelligently amendment weighing sensor and its weighing technique of multichannel digital uneven loading error |
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| Publication Number | Publication Date |
|---|---|
| CN104374453A true CN104374453A (en) | 2015-02-25 |
| CN104374453B CN104374453B (en) | 2017-08-15 |
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| CN201410722524.1A Active CN104374453B (en) | 2014-12-03 | 2014-12-03 | Intelligently amendment weighing sensor and its weighing technique of multichannel digital uneven loading error |
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| CN105091992A (en) * | 2015-09-16 | 2015-11-25 | 蚌埠天光传感器有限公司 | Self-show load sensor |
| CN106644012A (en) * | 2015-10-29 | 2017-05-10 | 上海朝辉压力仪器有限公司 | Vehicle-mounted weighing transmitter |
| CN108534873B (en) * | 2017-03-02 | 2021-07-16 | 碧彩股份两合公司 | Load cell for a weighing scale |
| CN108534872A (en) * | 2017-03-02 | 2018-09-14 | 碧彩股份两合公司 | Load sensor for scale |
| CN108534873A (en) * | 2017-03-02 | 2018-09-14 | 碧彩股份两合公司 | Load sensor for scale |
| US10830633B2 (en) | 2017-03-02 | 2020-11-10 | Bizerba SE & Co. KG | Load cell for a scale with a switching device for changing the state of calibration data write protection |
| US10837820B2 (en) | 2017-03-02 | 2020-11-17 | Bizerba SE & Co. KG | Load cell for a scale |
| CN107014473A (en) * | 2017-05-24 | 2017-08-04 | 深圳市靖洲科技有限公司 | A kind of dynamic electron miniature self-service car weighing apparatus of three holes cantilever beam foil gauge |
| CN107014472A (en) * | 2017-05-24 | 2017-08-04 | 深圳市靖洲科技有限公司 | A kind of dynamic electron miniature self-service car weighing apparatus of single hole cantilever beam foil gauge |
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| CN108955854A (en) * | 2018-07-19 | 2018-12-07 | 刘思颂 | A kind of balance Weighing apparatus and calibration method |
| CN108801407A (en) * | 2018-08-02 | 2018-11-13 | 梅特勒-托利多(常州)测量技术有限公司 | Weighing device, weighing method, weighing sensor and storage medium |
| CN109716410A (en) * | 2018-11-29 | 2019-05-03 | 深圳市泰和安科技有限公司 | A kind of fire alarm confirmation method, device and the terminal device of smoke detector |
| WO2021018160A1 (en) * | 2019-07-31 | 2021-02-04 | Mettler-Toledo (Changzhou) Measurement Technology Ltd. | Hysteresis compensation method for a weighing device |
| CN110514329A (en) * | 2019-08-08 | 2019-11-29 | 西安中星测控有限公司 | A kind of passive two-dimensional code load transducer and preparation method thereof |
| CN112254012A (en) * | 2020-09-30 | 2021-01-22 | 重庆瑞力比燃气设备有限责任公司 | Intelligent control's gas pressure regulating box |
| CN112665765A (en) * | 2020-12-01 | 2021-04-16 | 哈尔滨工业大学 | Robot high-rigidity joint torque sensor based on parallel load sharing principle |
| CN114935390A (en) * | 2022-05-17 | 2022-08-23 | 常州纺织服装职业技术学院 | Weighing force-measuring sensor for unbalance loading error compensation |
| CN114935390B (en) * | 2022-05-17 | 2023-08-08 | 常州纺织服装职业技术学院 | Weighing force transducer for offset load error compensation |
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| CN104374453B (en) | 2017-08-15 |
| WO2016086528A1 (en) | 2016-06-09 |
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