CN110440881A - A kind of single-point weighing system, weighing device and weighing method - Google Patents
A kind of single-point weighing system, weighing device and weighing method Download PDFInfo
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- CN110440881A CN110440881A CN201910648771.4A CN201910648771A CN110440881A CN 110440881 A CN110440881 A CN 110440881A CN 201910648771 A CN201910648771 A CN 201910648771A CN 110440881 A CN110440881 A CN 110440881A
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- 238000005303 weighing Methods 0.000 title claims abstract description 261
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000806 elastomer Substances 0.000 claims abstract description 109
- 229920001971 elastomer Polymers 0.000 claims abstract description 109
- 238000006073 displacement reaction Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 230000008859 change Effects 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 5
- 230000005484 gravity Effects 0.000 claims description 93
- 238000004364 calculation method Methods 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 22
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- 238000005259 measurement Methods 0.000 claims description 9
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- 238000012545 processing Methods 0.000 description 24
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- 229910001172 neodymium magnet Inorganic materials 0.000 description 19
- 238000010586 diagram Methods 0.000 description 12
- 239000002131 composite material Substances 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
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- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 241001149930 Protura <class> Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000037396 body weight Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002277 temperature effect Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
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- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
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Classifications
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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
- G01G3/1414—Arrangements for correcting or for compensating for unwanted effects
-
- 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
- G01G3/1414—Arrangements for correcting or for compensating for unwanted effects
- G01G3/1418—Arrangements for correcting or for compensating for unwanted effects for temperature variations
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The present invention relates to weight metering technical fields, a kind of single-point weighing system, including elastomer, it is made of low coefficient of thermal expansion materials, the elastomer, which has, is fixedly mounted position, weighing position and displacement deformation position, the elastomer is connect by installation position with external rigidity, and measured object force is in elastomer weighing position；Object deformation telemetry system, including monitoring assembly and monitored device, the monitored device are connected to the displacement deformation position of elastomer, and the monitoring side direction of the monitoring assembly is monitored device；The position of the displacement deformation position is set to change after elastomer bears measured object force, to detect the shift length of monitored device, by monitoring assembly to calculate the weight of measured object.The weighing device and corresponding weighing method that the present invention is also proposed single-point weighing system various deformation, constituted using single-point weighing system.
Description
Technical field
It is especially a kind of to be become by the load-bearing material bodily form to calculate weight of object the present invention relates to weight metering technical field
Weight metering technology.
Background technique
It is well known that the metering of substance weight is very universal while being also in the social production, practical experience of life of reality
Very important gage work.And the metering of weight be unable to do without weight metering utensil, especially using electronic balance as representative
Electronic weight meter has the very universal every aspect for being applied to social production, life.However, various electricity
Sub- weight metering utensil is nearly all based on weighing sensor, by weighing sensor and corresponding electronic circuit title again
The unknown weight value of quantity of material is converted into corresponding electronic signal, then, is converted into phase by computer or other electronic devices
Corresponding actual weight value.It is clear that the performance indicator of weighing sensor directly determines the electronic weighing scale being made from it
The performance indicator of measuring device tool.
Currently, the upper commonly used weighing sensor of electronic weight meter tool, classifies by working principle, is broadly divided into two
Major class, one kind are electromagnetic force equilibrium formula weighing sensors, and another kind of is resistance-strain chip weighing sensor.It is flat for electromagnetic force
Weighing apparatus formula weighing sensor is answered due to working principle and manufacturing cost and working service etc. so that it is popularized
Range and depth are significantly limited, it is difficult to a wide range of popularization and application.On the contrary, weighing for resistance-strain chip
Sensor, since its working principle is relatively easy, manufacturing cost is cheap, and installation and debugging and working service are convenient, so obtaining
Obtained quite extensive popularization and application.
For weighing sensor, especially resistance-strain chip single-point weighing system, currently, there is also certain in performance
Problem limits their further strengthened research and popularizes.
By taking the resistance-strain chip weighing sensor widely applied at present as an example, it is primarily present thermal stability ratio in the application
The problem of in terms of poor and Deviation bigger two.
The heat source for causing thermal stability poor first is that variation of ambient temperature causes, then has just mainly from two aspects
It is that heat caused by resistance-strain chip weighing sensor itself circuit works causes.
Tender subject is compared to environment temperature, be specifically exactly resistance-strain chip weighing sensor measurement output not only
The function for the gravity being subject to or the function of local environment temperature.
Other than variation of ambient temperature causes the signal output variation of resistance-strain chip weighing sensor, on the other hand,
Resistance-strain chip weighing sensor causes local temperature rise due to therein electronic circuit operational heat, and it is defeated to also result in its
Signal intensity out.And this point is determined by its working principle, is compared and is difficult to radical change, designer often has to beneficial
With unhelpful trade-off.
Other than variation of ambient temperature causes the signal output variation of weighing sensor, there are also the quadrangle of weighing sensor is inclined
Poor problem.The Deviation problem of so-called weighing sensor, simply says, exactly refers to weighing sensor in constant environment
(such as environment temperature, ambient humidity, environment atmospheric pressure) and other variables stablize constant (such as actuating system is stablized constant)
Under conditions of, after applying same load to the effective force area different location of weighing sensor, the output signal of weighing sensor
And different problem.
Exactly because weighing sensor has different degrees of thermal stability and Deviation, its metering essence is affected
Degree and quantification stability further affect corresponding electronics weight to affect the correctness of weighing sensor result output
Accuracy, the stability of the metric results of measurement instrument are measured, while the application range of weighing sensor also being caused to be restricted simultaneously
And the popularity restricted its application.
To solve the above-mentioned problems, people have carried out many years unremitting effort, although achieving certain improvement effect,
It is highly desirable to be that effect is not, especially in terms of high-precision applications, however it remains certain problem.
If thermal stability and Deviation problem are thoroughly solved, it will so that weighing sensor especially resistance-strain
The application of chip weighing sensor and universal further in-depth, it is further promote weight metering work to high-precision, low cost,
The more wide in range direction of application range strides forward.
Summary of the invention
To solve the above problems, the present invention provides a kind of weighing device being made of single-point weighing system.The present invention provides
The weighing device being made of single-point weighing system, preferably resolve the generally existing thermal stability of weighing sensor and quadrangle
Offset issue.In addition, the invention also provides a kind of weighing methods.
To achieve the above object, the technical solution adopted by the present invention is that:
In first technical solution, a kind of single-point weighing system, including
Elastomer is made of low coefficient of thermal expansion materials, and the elastomer, which has, is fixedly mounted position, weighing position and displacement
Deforming position, the elastomer are connect by installation position with external rigidity, and measured object force is in elastomer weighing position；
Object deformation telemetry system, including monitoring assembly and monitored device, the monitored device are connected to elastomer
Displacement deformation position；
The position of the displacement deformation position is set to change after elastomer bears measured object force, to pass through monitoring group
Part detects the shift length of monitored device, to calculate the weight of measured object.
In first technical solution, preferably, single-point weighing system further includes sub- load body and support base, it is described
Elastomer is horizontal "u"-shaped, and support base is mounted on the bottom surface of elastomer lower extension, and the sub- load body is mounted on
The top surface of extension on the upside of elastomer, the monitored device are mounted on the bottom surface of extension on the upside of elastomer.
In first technical solution, preferably, single-point weighing system also steamed stuffed bun load body, the elastomer include
The L shape structure being made of vertical ennation and horizontal extension body, the vertical ennation lower end are fixed, and the of horizontal extension body
One end is connected to the upper end of vertical ennation, and the middle part of horizontal extension body bottom surface is arranged in the monitored device, and the son is held
The bottom of horizontal extension body second end is arranged in power body.
In first technical solution, preferably, single-point weighing system further includes sub- load body and support base, it is described
Elastomer is a plate, and the bottom surface first end of elastomer is arranged in the support base, and the sub- load body is arranged in second end
The bottom surface of the second end is arranged in the top surface in portion, the monitored device.
In first technical solution, preferably, single-point weighing system further includes sub- load body and synchronous rigid body, institute
It states vertical setting based on elastomer and helically rises shape, the elastomer lower end is fixed, and the synchronous rigid body sets for level
The bar shape set, the upper end of elastomer are connected to the bottom surface of the first end of synchronous rigid body, and the monitored device is connected to synchronization
The top surface of synchronous rigid body is arranged in the bottom surface of rigid body second end, the sub- load body.
In second technical solution, weighing device, including at least three single-point meter as described in first technical solution
Weight system, weighing device further includes load rigid body, and the sub- load body and the elastomer connection surface are first surface, described
Load rigid body is connected to the second surface of sub- load body, and first surface and second surface are mutually backwards, and the load rigid body is
Tabular, and single-point weighing system setting is separately positioned on the edge or load rigid body bottom edge of load rigid body bottom surface
Middle part.
In second technical solution, preferably, the son is held when the first surface is the bottom surface of sub- load body
Power body is hemisphere socket shape, and hemisphere socket is set up；The bottom of the load rigid body is equipped with several power transmission cones, described
Power transmission cone position is identical as the quantity of the sub- load body and position is corresponding, and the tip of power transmission cone is arranged downward, described
Load rigid body is connect by the mode in the intron load body hemisphere socket of power transmission cone lower end with sub- load body.
In third technical solution, a kind of weighing method uses the weighing device proposed in second technical solution, packet
Include following steps
Step 1,
The calibration of single-point weighing system:
At least three calibration gravity of setting, is added to sub- load body for calibration gravity and elastomer is made to generate deformation, pass through
The displacement deformation position that object deformation telemetry system measures elastomer when each calibration gravity is applied to elastomer corresponds to displacement, shape
At the data for corresponding to displacement by calibration gravity and the calibration gravity, it is recorded as " single-point weighing system telemetering output valve control
Table "；
Step 2,
The Gravity calculation that single single-point weighing system is born:
Equipped with a single-point weighing system of N (3≤N), to each single-point weighing system, since additional gravity makes its elastomer
Deformation is generated, displacement is corresponded to by the displacement deformation position that object deformation telemetry system measures elastomer, in conjunction with " single-point weight calculation system
System telemetering exports value comparison table " gravity that bears of each single-point weighing system of the Fitting Calculation and it is set to YXn, 3≤n≤N, n
It is number of N number of single-point weighing system since 1；
Weighing device zero load Gravity calculation:
After weighing device removes measured object, the telemetering output valve of each single-point weighing system is measured and recorded, in conjunction with " single-point
Weighing system telemetering exports value comparison table " gravity that bears of each single-point weighing system of the Fitting Calculation and it is set as YFn 0；3≤n≤N,
N is number of N number of single-point weighing system since 1；
Step 3, the weight for calculating measured object:
If gravity weighing value of the weighing device when weighing measured object is YX, thenIf weighing device is not
Gravity weighing value when weighing measured object is YF, thenIf the gravity of measured object is YW, YW=YX-YF, YW are mono-
Position is newton.
In third technical solution, preferably,
In step 1, if zero point gravity value is Y0, half range gravity value is Y1, gamut gravity value is Y2, unit is
Newton.By Y0、Y1、Y2It is applied separately to each single-point weighing system, measures corresponding each single-point weighing system telemetering output valve
And it is set to X0、X1、X2, unit is volt.In this way, obtaining N group measurement data { n, (X0、Y0), (X1、Y1), (X2、Y2),
1≤n≤N, n are number of N number of single-point weighing system since 1, obtain " single-point weighing system telemetering exports value comparison table ".
In third technical solution, preferably,
In step 2, the gravity that single single-point weighing system is born is calculated using conic fitting,
Determine that the number for being intended to polynomial fitting is 2, by formula
Calculate SkWith tr.X in formula0、Y0、X1、Y1、X2、Y2For by looking into, " single-point weighing system telemetering output valve is compareed
Table " obtain determination datum；
S calculatedkWith tr, list normal equation group
Normal equation group listed above is solved, determining equation group coefficient a is obtained0、a1、a2, and then obtain required gravity Y
Calculation formula
X is that the gravity Y of unknown magnitude is applied to the telemetering output valve obtained after single-point weighing system in formula, and X unit is
Volt, Y unit are newton.
Using the beneficial effects of the present invention are:
1. the present invention is constituted the gravity induction element of single-point weighing system with low thermal coefficient of expansion elastic material, effectively subtract
The small temperature effect of weighing device, improves the thermal stability of weighing device.2. the present invention is with object deformation (displacement) telemetering
The physical deformation for the gravity induction element that the detection that system carrys out no Mechanical Contact is generated by gravity, and it is transformed into electric signal, effectively
Avoid gravity perception link machine error and temperature effect.3. the present invention uses object deformation (displacement) telemetry system,
Effectively avoid self-heating bring thermal stability problems.4. the present invention is using the force resolution in theory of mechanics -- synthesis
One desire dynamometry is decomposed into several component, then digital quantity is accurately detected and be converted to each component by principle, finally
Digital quantity synthesis is converted into again the true magnitude for being intended to dynamometry, effectively avoids position error problem.5. of the invention former
Reason and technology are novel, mature, and manufacturing cost is cheaper, and stability, precision guarantee technology are real, reliable.
Detailed description of the invention
Fig. 1 is single-point weighing system structural schematic diagram in embodiment 1.
Fig. 2 is 1 single-point weighing system side structure schematic diagram of embodiment.
Fig. 3 is the structural schematic diagram of weighing device in embodiment 1.
Fig. 4 is the cross-sectional view in Fig. 3 along the direction A-A.
Fig. 5 is the single-point weighing system structural schematic diagram of weighing device in embodiment 2.
Fig. 6 is the single-point weighing system side structure schematic diagram of weighing device in embodiment 2.
Fig. 7 is the partial structural diagram of weighing device in embodiment 2.
Fig. 8 is the structural schematic diagram of weighing device in embodiment 2.
Fig. 9 is the cross-sectional view in Fig. 8 along the direction A-A.
Figure 10 is the structural schematic diagram of weighing device in embodiment 3.
Figure 11 is the overlooking structure diagram of weighing device in embodiment 3.
Figure 12 is the structural schematic diagram of weighing device in embodiment 4.
Figure 13 is the overlooking structure diagram of weighing device in embodiment 4.
Figure 14 is the circuit diagram of weighing device.
Figure 15 is the main control chip schematic illustration of weighing device.
Appended drawing reference includes:
1- load body, 2- high temperature neodymium iron boron permanent magnet, 3- elastomer, 4- support base, 5- Hall integrated circuit, 6- are solid
Determine bottom plate, 7- power transmission cone, 8- load rigid body, 9- data processing equipment, the synchronous rigid body of 10-.
Specific embodiment
To keep the purposes, technical schemes and advantages of the technical program more clear, With reference to embodiment,
The technical program is further described.It should be understood that these descriptions are merely illustrative, rather than to limit this technology side
The range of case.
As shown in Fig. 1-Figure 15, a kind of single-point weighing system that the present embodiment proposes, including
Elastomer 3, is made of low coefficient of thermal expansion materials, and elastomer 3, which has, is fixedly mounted position, weighing position and displacement change
Morpheme, elastomer 3 are connect by installation position with external rigidity, and measured object force is in the weighing of elastomer 3 position；
Object deformation telemetry system, including monitoring assembly and monitored device, monitored device are connected to the position of elastomer 3
Move deforming position；
The position of displacement deformation position is set to change after elastomer 3 bears measured object force, to pass through monitoring assembly
The shift length of monitored device is detected, to calculate the weight of measured object.
Single-point weighing system and the weighing device that is made of single-point weighing system are described in detail by the following examples
Specific structure and corresponding weighing method.Monitoring assembly is Hall integrated circuit 5, and being monitored device is high temperature neodymium iron boron permanent magnetic
Body 2.In the present embodiment, the monitoring side of monitoring assembly is towards device and face is monitored, for most preferably.In other embodiments
In, it can also be with the monitoring side of monitoring assembly and monitored device not in the position of face.
Embodiment 1
In the present embodiment, the material of elastomer 3 is carbon fibre composite.
Single-point weighing system includes sub- load body 1 and support base 5, and elastomer 3 is horizontal "u"-shaped, and support base 5 is pacified
Mounted in the bottom surface of 3 lower extension of elastomer, sub- load body 1 is mounted on the top surface of 3 upside extension of elastomer, is monitored device
It is mounted on the bottom surface of 3 upside extension of elastomer.
Specifically, as Figure 1-Figure 4, present embodiment example proposes to apply the technical scheme of the present invention what design was implemented
A kind of weighing device of no angular difference, good thermal stability.
The weighing device of the no angular difference, good thermal stability, it is rigid by 4 sets of mutually independent single-point weighing systems and load
Body 8, data processing circuit 9 collectively form.
4 weighing systems of the weighing device composition complete set of the no angular difference, good thermal stability.
4 sets of mutually independent single-point weighing systems, including 1,4 high temperature neodymium iron boron of mutually independent 4 sub- load bodies is forever
Long 3,4, elastomer, 4,4 Hall integrated circuits 5 of support base of magnet 2,4, a fixed bottom plate 6.
The support base 4,4 of data processing circuit 9,4 Hall integrated circuit 5 is fixedly connected with fixed bottom plate 6 respectively；Data
Processing circuit 9 is electrically connected with 4 Hall integrated circuits 5 respectively, and the electric signal of Hall integrated circuit 5 is transmitted at data
Manage circuit 9；3 lower end of elastomer is fixedly connected with support base 4, upper end lower plane is fixedly connected with high temperature neodymium iron boron permanent magnet 2,
Plane is fixedly connected with sub- load body 1 on upper end；The lower plane of load rigid body 8 is fixedly connected with 4 sub- load bodies 1 respectively；It is high
Warm neodymium iron boron permanent magnet 2 is located at right above Hall integrated circuit 5, and the two center vertical line is overlapped.
A kind of no angular difference, good thermal stability the weighing device course of work be, it is rigid when there is gravity to be applied to multiple spot component
When body plane SM, which is decomposed into 4 component by load rigid body 8, and each component is synchronous to pass by corresponding sub- load body 1
It is delivered to corresponding elastomer 3, and leads to 3 deformation of elastomer, and then leads to corresponding high temperature neodymium iron boron permanent magnet 2 and Hall collection
Change at the distance between circuit 5, so that the output valve of Hall integrated circuit 5 changes, data processing circuit 9 receives the integrated electricity of Hall
The output valve on road 5 carries out calculation processing, and is converted to true gravity value output.
A kind of no angular difference, good thermal stability weighing device complete application process it is as follows:
The first step, the calibration of single-point weighing system.
By sub- load body 1, high temperature neodymium iron boron permanent magnet 2, elastomer 3, support base 4, Hall integrated circuit 5, fix
After bottom plate 6 constitutes single-point weighing system, it is demarcated first, establishes " single-point weighing system telemetering exports value comparison table ".
Select zero point gravity value, half range gravity value, 3 points of gamut gravity value fixed into rower.
If zero point gravity value is Y0, half range gravity value is Y1, gamut gravity value is Y2, unit is newton.Y0、
Y1、Y2It is applied separately to each single-point weighing system, measure corresponding single-point weighing system telemetering output valve and is set to
X0、X1、X2, unit is volt.In this way, obtaining 4 groups of measurement data { n, (X0、Y0), (X1、Y1), (X2、Y2), 1≤n≤4, n
It is number of 4 single-point weighing systems since 1.This group of data are saved, and are referred to as " single-point weighing system telemetering output valve pair
According to table ".
Second step, the Gravity calculation that single-point weighing system is born.
If after the gravity Y of unknown magnitude is applied to single-point weighing system, obtained telemetering output valve is X, " single-point meter is looked into
Weight system telemetry exports value comparison table ", obtain one group of data { n, (X0、Y0), (X1、Y1), (X2、Y2), 1≤n≤4, n are 4
Number of the single-point weighing system since 1.
2 curve matchings in applied mathematics theory calculate the gravity that single-point weighing system is born, and determination is intended to be fitted multinomial
The number of formula is 2, by formula
Calculate SkWith tr.X in formula0、Y0、X1、Y1、X2、Y2For by looking into, " single-point weighing system telemetering output valve is compareed
Table " obtain determination datum；
S calculatedkWith tr, list normal equation group
Normal equation group listed above is solved, determining equation group coefficient a is obtained0、a1、a2, and then obtain required gravity Y
Calculation formula
After X is applied to single-point weighing system for the gravity Y of unknown magnitude in formula, obtained telemetering output valve, the list of X, Y
Position is consistent with the unit used when production " single-point weighing system telemetering exports value comparison table ", i.e., X unit is volt, and Y unit is
Newton.
Third step, 4 weighing system Gravity calculations
In addition to ontology gravity, any external force is not applied to 4 weighing system multiple spot component Rigid Planar SM, measured and recorded
The telemetering output valve of each single-point weight metering system, using the Gravity calculation step that single-point weighing system is born, to each
Single-point weight metering system carries out Gravity calculation, obtains 4 single-point weighing system this body weight magnitudes, and be set to YF1 0,
YF2 0YF3 0, YF4 0。
If this body weight of actual 4 weighing systems load rigid body is YF, then
In 4 weighing system range abilities, a unknown magnitude is applied to 4 weighing system multiple spot component Rigid Planar SM
Gravity.The telemetering output valve for measuring and recording each single-point weight metering system, the weight born using single-point weighing system
Power calculates step, obtains 4 A/W magnitudes, and be set to YX1, YX2, YX3, YX4.It then sums formulaExactly contain the measured value of load rigid body own wt.
If surveying unknown gravity value is YW, then YW=YX-YF.
YW is just consequently exerted at the true gravity value on 4 weighing system multiple spot component Rigid Planar SM.
Embodiment 2
In the present embodiment, the material of elastomer 3 is carbon fibre composite.
Single-point weighing system includes sub- load body 1, and elastomer 3 includes being made of vertical ennation and horizontal extension body
L shape structure, vertical ennation lower end are fixed, and the first end of horizontal extension body is connected to the upper end of vertical ennation, are monitored
The middle part of horizontal extension body bottom surface is arranged in device, and the bottom of horizontal extension body second end is arranged in sub- load body 1.
Specifically, present embodiment example proposes that one kind applies the technical scheme of the present invention and designs reality as shown in Fig. 5-Fig. 9
The weighing device of a kind of no angular difference, good thermal stability applied.
A kind of weighing device of no angular difference, good thermal stability, it is rigid by 4 sets of mutually independent single-point weighing systems and load
Body 8, data processing circuit 9 collectively form.
A kind of no angular difference, good thermal stability weighing device constitute 4 weighing systems of complete set.
4 sets of mutually independent single-point weighing systems, every set all respectively include mutually independent sub- load body 1, high temperature neodymium iron
Boron permanent magnet 2, elastomer 3, Hall integrated circuit 5, fixed bottom plate 6 (4 sets public).
9,4 Hall integrated circuits 5 of data processing circuit are fixedly connected with fixed bottom plate 6 respectively；Data processing circuit 9 divides
It is not electrically connected with 4 Hall integrated circuits 5, and the electric signal of Hall integrated circuit 5 is transmitted to data processing circuit 9；Often
A 3 lower end of elastomer is fixedly connected with fixed bottom plate 6 (4 sets public), and each 3 upper end lower plane of elastomer and high temperature neodymium iron boron are forever
Long magnet 2 is fixedly connected, and each 3 upper end lower plane of elastomer is fixedly connected with sub- load body 1；The upper plane four of load rigid body 8
Angular position is fixedly connected with 4 sub- load bodies 1 respectively；High temperature neodymium iron boron permanent magnet 2 is located at right above Hall integrated circuit 5,
And the two center vertical line is overlapped.
A kind of no angular difference, good thermal stability the weighing device course of work be, it is rigid when there is gravity to be applied to multiple spot component
When body plane SM, which is decomposed into 4 component by load rigid body 8, and each component is synchronous to pass by corresponding sub- load body 1
It is delivered to corresponding elastomer 3, and leads to 3 deformation of elastomer, and then leads to corresponding high temperature neodymium iron boron permanent magnet 2 and Hall collection
Change at the distance between circuit 5, so that the output valve of Hall integrated circuit 5 changes, data processing circuit 9 receives the integrated electricity of Hall
The output valve on road 5 carries out calculation processing, and is converted to true gravity value output.
A kind of no angular difference, good thermal stability weighing device embodiment example 2 complete application process, and it is aforementioned
Embodiment example 1 is identical, and details are not described herein.
Embodiment 3
In the present embodiment, the material of elastomer 3 is carbon fibre composite.
Single-point weighing system further includes sub- load body 1 and support base 5, and the elastomer 3 is a plate, the support base 5
The bottom surface first end of elastomer 3 is set, and the top surface of the second end, the monitored device is arranged in the sub- load body 1
The bottom surface of the second end is set.
As shown in Figure 10, Figure 11,
A kind of no angular difference, good thermal stability single-point weighing system held by 4 sets of mutually independent single-point weighing systems
Power rigid body 8, data processing circuit 9, power transmission cone 7 collectively form.
A kind of no angular difference, good thermal stability weighing device constitute 4 weighing systems of complete set.
4 sets of mutually independent single-point weighing systems, every set all respectively include mutually independent sub- load body 1, high temperature neodymium iron
Boron permanent magnet 2, elastomer 3, support base 4, Hall integrated circuit 5, fixed bottom plate 6.In the present embodiment, two sets of single-point weight calculation systems
It unites a public elastomer 3, the public support base 4 of two sets of single-point weighing systems, four sets of single-point weighing systems public one solid
Determine bottom plate 6.
The Hall integrated circuit 5,2 of data processing circuit 9,4 support base 4 is fixedly connected with fixed bottom plate 6 respectively；Support
Seat 4 is fixedly connected with the planar central position of elastomer 3 above；Data processing circuit 9 is electric with 4 Hall integrated circuits 5 respectively
Property connection, and the electric signal of Hall integrated circuit 5 is transmitted to data processing circuit 9；The end lower surface of each elastomer 3 with
High temperature neodymium iron boron permanent magnet 2 is fixedly connected, and each 3 end upper surface of elastomer is fixedly connected with sub- load body 1；Load rigid body
8 lower plane four corners position is fixedly connected with the cone base of 4 power transmission cones 7 respectively；The conehead difference 4 of 4 power transmission cones 7
A hemisphere socket with sub- load body 1, which is floated, to be connected, and the half of the cone bottom center vertical line of power transmission cone 7 and sub- load body 1
Ball-and-socket slot crosses the coincidence of center of circle vertical line；High temperature neodymium iron boron permanent magnet 2 is located at right above Hall integrated circuit 5, and the two center
Vertical line is overlapped；
A kind of no angular difference, good thermal stability the weighing device course of work be, it is rigid when there is gravity to be applied to multiple spot component
When on body plane SM, which is decomposed into 4 component by load rigid body, and each component is transmitted to by corresponding power transmission cone 7
Corresponding sub- load body 1, then synchronizes and is transmitted to corresponding elastomer 3, and leads to 3 deformation of elastomer, and then cause corresponding
High temperature neodymium iron boron permanent magnet 2 between Hall integrated circuit 5 at a distance from change, so that the output valve of Hall integrated circuit 5 changes,
The output valve that data processing circuit 9 receives Hall integrated circuit 5 carries out calculation processing, and is converted to true gravity value output.
A kind of no angular difference, good thermal stability weighing device embodiment example 3 complete application process, and it is aforementioned
Embodiment example 1 is identical, and details are not described herein.
Embodiment 4
In the present embodiment, the material of elastomer 3 is carbon fibre composite.
Single-point weighing system includes sub- load body 1 and synchronous rigid body 10, based on elastomer 3 vertical setting and helically on
The helical structure that liter shape, i.e. elastomer 3 are spring-like, 3 lower end of elastomer are fixed, and synchronous rigid body 10 is horizontally disposed bar shaped
Body, the upper end of elastomer 3 are connected to the bottom surface of the first end of synchronous rigid body 10, and monitored device is connected to synchronous rigid body 10 second
The top surface of synchronous rigid body 10 is arranged in the bottom surface at end, sub- load body 1.
As shown in Figure 12 and Figure 13, the weighing device of a kind of no angular difference, good thermal stability, by 4 sets of mutually independent single-points
Weighing system, load rigid body 8, data processing circuit 9 collectively form.
A kind of no angular difference, good thermal stability weighing device constitute 4 weighing systems of complete set.
4 sets of mutually independent single-point weighing systems, every set all respectively include mutually independent sub- load body 1, high temperature neodymium iron
Boron permanent magnet 2, elastomer 3, synchronous rigid body 10, Hall integrated circuit 5, fixed bottom plate 6 (4 sets public).
The Hall integrated circuit 5,4 of data processing circuit 9,4 elastomer 3 is fixedly connected with fixed bottom plate 6 respectively；It is synchronous
Rigid body is fixedly connected below 10 one end with elastomer 3, with end above is fixedly connected with sub- load body 1, and below the other end with
High temperature neodymium iron boron permanent magnet 2 is fixedly connected；Data processing circuit 9 is electrically connected with 4 Hall integrated circuits 5 respectively, and handle
The electric signal of Hall integrated circuit 5 is transmitted to data processing circuit 9；The lower plane four corners position of load rigid body 8 is passed with 4 respectively
The cone base of power cone 7 is fixedly connected；The conehead of 4 power transmission cones 7 distinguishes 4 and the hemisphere socket of sub- load body 1 is floated
It connects, and the cone bottom center vertical line of power transmission cone 7 is crossed center of circle vertical line with the hemisphere socket of sub- load body 1 and is overlapped；High temperature neodymium
Iron boron permanent magnet 2 is located at right above Hall integrated circuit 5, and the two center vertical line is overlapped；
A kind of no angular difference, good thermal stability the weighing device course of work be, it is rigid when there is gravity to be applied to multiple spot component
When on body plane SM, which is decomposed into 4 component by load rigid body, and each component is transmitted to by corresponding power transmission cone 7
Corresponding sub- load body 1, then synchronizes and is transmitted to corresponding synchronous rigid body 10 and elastomer 3, and leads to 3 deformation of elastomer, into
And cause corresponding high temperature neodymium iron boron permanent magnet 2 between Hall integrated circuit 5 at a distance from change, thus Hall integrated circuit 5
Output valve change, the output valve that data processing circuit 9 receives Hall integrated circuit 5 carries out calculation processing, and is converted to true
Gravity value output.
A kind of no angular difference, good thermal stability weighing device embodiment example 4 complete application process, and it is aforementioned
Embodiment example 1 is identical, and details are not described herein.
On the whole, the weighing device in above embodiments, including at least four single-point weighing system, weighing device also wrap
Include load rigid body 8, sub- load body 1 and 3 connection surface of elastomer are first surface, and load rigid body 8 is connected to the of sub- load body 1
Two surfaces, and first surface and second surface are mutually backwards, load rigid body 8 is tabular, and four single-point weighing systems are arranged
It is separately positioned on the middle part of 8 bottom edge of edge or load rigid body of 8 bottom surface of load rigid body.In the embodiment above, load
Rigid body 8 is rectangular flat plate, and in other embodiments, load rigid body 8 can be the other shapes such as circular flat plate.
Preferably, sub- load body 1 is hemisphere socket shape, and half ball-and-socket when first surface is the bottom surface of sub- load body 1
Slot is set up；The bottom of load rigid body 8 is equipped with several power transmission cones 7, the quantity of 7 position of power transmission cone and sub- load body 1
Identical and position is corresponding, and the tip of power transmission cone 7, towards setting, load rigid body 8 passes through 7 lower end intron load of power transmission cone
Mode in 1 hemisphere socket of body is connect with sub- load body 1.
In addition, the weighing method that weighing device uses in embodiment 1- embodiment 4, as follows:
Step 1,
The calibration of single-point weighing system:
At least three calibration gravity of setting, is added to sub- load body 1 for calibration gravity and elastomer 3 is made to generate deformation, lead to
Cross the corresponding displacement in displacement deformation position that object deformation telemetry system measures elastomer 3 when each calibration gravity is applied to elastomer 3
Amount forms the data for corresponding to displacement by calibration gravity and the calibration gravity, is recorded as " single-point weighing system telemetering output valve
The table of comparisons "；
Step 2,
The Gravity calculation that single single-point weighing system is born:
The component of the gravity of measured object or gravity is applied at least three elasticity made of low coefficient of thermal expansion materials
On body 3, so that elastomer 3 generates deformation, the corresponding displacement in displacement deformation position that elastomer 3 is measured by object deformation telemetry system
Amount, the gravity YX born in conjunction with each single-point weighing system of " single-point weighing system telemetering exports value comparison table " the Fitting Calculationn；1
≤ n≤4, n are number of 4 single-point weighing systems since 1；
Weighing device zero load Gravity calculation:
The telemetering output valve of each single-point weighing system is measured and recorded after removing measured object to weighing device, in conjunction with
The gravity YF that each single-point weighing system of " single-point weighing system telemetering exports value comparison table " the Fitting Calculation is bornn 0；1≤n≤4, n
It is number of 4 single-point weighing systems since 1；
Step 3,
Calculate the weight of measured object:
If gravity weighing value of the weighing device when weighing measured object is YX, then
If gravity weighing value of the weighing device when not weighing measured object is YF, thenIf the weight of measured object
Power is YW, and YW=YX-YF, YW unit is newton.
Preferably,
In step 1, if zero point gravity value is Y0, half range gravity value is Y1, gamut gravity value is Y2, unit is
Newton.By Y0、Y1、Y2It is applied separately to each single-point weighing system, measures corresponding each single-point weighing system telemetering output valve
And it is set to X0、X1、X2, unit is volt.In this way, obtaining 4 groups of measurement data { n, (X0、Y0), (X1、Y1), (X2、Y2),
1≤n≤4, n are number of 4 single-point weighing systems since 1, obtain " single-point weighing system telemetering exports value comparison table ".
Preferably,
In step 2, the gravity that single single-point weighing system is born is calculated using conic fitting, determination is intended to be fitted more
The number of item formula is 2, by formula
Calculate SkWith tr.X in formula0、Y0、X1、Y1、X2、Y2For by looking into, " single-point weighing system telemetering output valve is compareed
Table " obtain determination datum；
S calculatedkWith tr, list normal equation group
Normal equation group listed above is solved, determining equation group coefficient a is obtained0、a1、a2, and then obtain required gravity Y
Calculation formula
X is that the gravity Y of unknown magnitude is applied to the telemetering output valve obtained after single-point weighing system in formula, and X unit is
Volt, Y unit are newton.
In short, the technical program includes the following contents:
1, weight transfer converting unit is done with low coefficient of thermal expansion materials elastomer, the magnitude for the gravity being subject to is converted into
The magnitude of elastomer deformation；Using object deformation telemetry system unit, physical contact detects low coefficient of thermal expansion materials
The magnitude of elastomer deformation, and electric signal output is converted by electronic circuit.For sake of convenience, referred to as above swollen by single low-heat
The system of swollen coefficient material elastomer and corresponding object deformation telemetry system unit composition is single-point weighing system.
2, the calibration of weight telemetering output valve is carried out to single-point weighing system, establishes " single-point weighing system telemetering output valve pair
According to table ".
3, gravity distributor is established, the N (N being assigned to not on the same line that gravity synchronous damage-free to be detected is lost
>=3) point configures mutually independent single-point weighing system to every bit.For sake of convenience, referred to as above that independent single-point meter is covered by N
The weight metering system that weight system and the combination of gravity distributor are constituted is N point weighing system.
4, the gravity of a unknown magnitude is applied to N point weighing system, synchronizes and detects each single-point weighing system output
Telemetering electric signal, according to " the single-point weighing system telemetering export value comparison table " having had built up, application of mathematical method is calculated
The gravitational magnitude that each single-point weighing system is subject to out.
5, it sums to the gravitational magnitude that all single-point weighing systems are subject to, the gravitational magnitude summation acquired is applied to N
Actual weight magnitude in point weighing system.
The N point weighing system and weighing method constitute the completely weighing device without angular difference, good thermal stability.
As explanation, the main control chip model HT32F1656 that the present embodiment uses, in all embodiments, son is held
Power body 1, support base 4, load rigid body 8, power transmission cone 7, synchronous 10 material therefor of rigid body are preferably rigid carbon-fiber composite material,
Carbon fibre composite is most rapidly growing in recent years new material, since carbon fibre composite has high-intensitive, height
Outstanding advantages of modulus, density are low, fatigue durability is good, thermal expansion coefficient is small obtains extensively in high-tech areas such as Aeronautics and Astronautics
General application.The carbon fibre composite elastomer made of carbon fibre composite has specific strength high, and elasticity is good, thermostabilization
Property good, the good distinguishing feature of fatigue durability, exactly these features make carbon fibre composite elastomer be particularly suitable for design system
Make critical component-elastomer 3 of single-point weighing system.In other embodiments, elastomer 3 can use beryllium-bronze, spring steel
Etc. alternative materials be made.
As explanation, object deformation telemetry system is a set of machinery, optics, electronics synthesis measuring system, important
Performance characteristics are exactly that under the conditions of physical contact, can accurately measure the physical deformation amount or displacement of testee,
And measurement process itself has no effect to the physical deformation amount or displacement of testee, cannot especially generate to systematicness
It can influential additional heat.Its measurement result exports in electrical signal form, either analog quantity, is also possible to digital quantity.
Common deformation telemetry system such as laser ranging system, optoelectronic induction range-measurement system, ultrasonic ranging system, electromagnetic induction ranging
System, capacitance distance measuring system etc..In addition, object deformation telemetry system is it can be appreciated that ohject displacement telemetry system.
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according in this technology
The thought of appearance, in specific embodiments and applications can be with many changes may be made, as long as these variations are without departing from the present invention
Design, belong to the protection scope of this patent.
Claims (10)
1. a kind of single-point weighing system, it is characterised in that: including
Elastomer is made of low coefficient of thermal expansion materials, and the elastomer, which has, is fixedly mounted position, weighing position and displacement deformation
Position, the elastomer are connect by installation position with external rigidity, and measured object force is in elastomer weighing position；
Object deformation telemetry system, including monitoring assembly and monitored device, the monitored device are connected to the position of elastomer
Move deforming position；
The position of the displacement deformation position is set to change after elastomer bears measured object force, to examine by monitoring assembly
The shift length of monitored device is surveyed, to calculate the weight of measured object.
2. single-point weighing system according to claim 1, it is characterised in that: the single-point weighing system further includes sub- load
Body and support base, the elastomer are horizontal "u"-shaped, and support base is mounted on the bottom surface of elastomer lower extension, institute
The top surface that sub- load body is mounted on extension on the upside of elastomer is stated, the monitored device is mounted on extension on the upside of elastomer
Bottom surface.
3. single-point weighing system according to claim 1, it is characterised in that: the single-point weighing system further includes sub- load
Body, the elastomer include the L shape structure being made of vertical ennation and horizontal extension body, and the vertical ennation lower end is solid
Fixed, the first end of horizontal extension body is connected to the upper end of vertical ennation, and the monitored device is arranged at horizontal extension body bottom
The bottom of horizontal extension body second end is arranged in the middle part in face, the sub- load body.
4. single-point weighing system according to claim 1, it is characterised in that: the single-point weighing system further includes sub- load
Body and support base, the elastomer are a plate, and the bottom surface first end of elastomer, the sub- load is arranged in the support base
The top surface of the second end is arranged in body, and the bottom surface of the second end is arranged in the monitored device.
5. single-point weighing system according to claim 1, it is characterised in that: the single-point weighing system further includes sub- load
Body and synchronous rigid body vertical setting and helically rise shape based on the elastomer, and the elastomer lower end is fixed, described same
Step rigid body is horizontally disposed bar shape, and the upper end of elastomer is connected to the bottom surface of the first end of synchronous rigid body, described monitored
Device is connected to the bottom surface of synchronous rigid body second end, and the top surface of synchronous rigid body is arranged in the sub- load body.
6. weighing device, including the described in any item single-point weighing systems of at least three such as claim 2-5, it is characterised in that: institute
Stating weighing device further includes load rigid body, and the sub- load body and the elastomer connection surface are first surface, the load
Rigid body is connected to the second surface of sub- load body, and first surface and second surface are mutually backwards, and the load rigid body is plate
Shape, and the single-point weighing system is separately positioned on the edge of load rigid body bottom surface or the middle part of load rigid body bottom edge.
7. weighing device according to claim 6, it is characterised in that: when the first surface is the bottom surface of sub- load body,
The sub- load body is hemisphere socket shape, and hemisphere socket is set up；The bottom of the load rigid body is equipped with several power transmissions
Cone, the power transmission cone position is identical as the quantity of the sub- load body and position is corresponding, and the tip of power transmission cone is downward
Setting, the load rigid body are connect by the mode in the intron load body hemisphere socket of power transmission cone lower end with sub- load body.
8. a kind of weighing method uses weighing device as claimed in claim 6, it is characterised in that: include the following steps
Step 1,
The calibration of single-point weighing system:
At least three calibration gravity of setting, is applied to sub- load body for calibration gravity and elastomer is made to generate deformation, pass through object
Deformation telemetry system measures each calibration gravity and correspond to displacement in the displacement deformation position of elastomer when being applied to elastomer, formation by
Calibration gravity and the calibration gravity correspond to the data of displacement, are recorded as " single-point weighing system telemetering exports value comparison table "；
Step 2,
The Gravity calculation that single single-point weighing system is born:
Equipped with a single-point weighing system of N (3≤N), to each single-point weighing system, since additional gravity generates its elastomer
Deformation corresponds to displacement by the displacement deformation position that object deformation telemetry system measures elastomer, in conjunction with " single-point weighing system is distant
Survey output value comparison table " gravity that bears of each single-point weighing system of the Fitting Calculation and it is set to YXn；3≤n≤N, n are N number of
Number of the single-point weighing system since 1；
Weighing device zero load Gravity calculation:
After weighing device removes measured object, the telemetering output valve of each single-point weighing system is measured and recorded, in conjunction with " single-point weight calculation
System telemetry exports value comparison table " it the unloaded gravity that bears of each single-point weighing system of the Fitting Calculation and is set to3≤n
≤ N, n are number of N number of single-point weighing system since 1；
Step 3,
Calculate the weight of measured object:
If gravity weighing value of the weighing device when weighing measured object is YX, thenIf weighing device is not claiming
Gravity weighing value when measuring measured object is YF, thenIf the gravity of measured object is YW, then YW=YX-YF, YW
Unit is newton, and 3≤n≤N, n are number of N number of single-point weighing system since 1；
9. weighing method according to claim 8, it is characterised in that:
In step 1, if zero point gravity value is Y0, half range gravity value is Y1, gamut gravity value is Y2, unit is newton；
By Y0、Y1、Y2It is applied separately to each single-point weighing system, measure corresponding each single-point weighing system telemetering output valve and is divided
X is not set as it0、X1、X2, unit is volt；Obtain N group measurement data { n, (X0、Y0), (X1、Y1), (X2、Y2), 1≤n≤N, n
It is number of N number of single-point weighing system since 1, obtains " single-point weighing system telemetering exports value comparison table ".
10. weighing method according to claim 8, it is characterised in that:
In step 2, the gravity that single single-point weighing system is born is calculated using conic fitting,
Determine that the number for being intended to polynomial fitting is 2, by formula
Calculate SkWith tr；
X in formula0、Y0、X1、Y1、X2、Y2For by having looked into determination that " single-point weighing system telemetering export value comparison table " obtains
Know number；
S calculatedkWith tr, list normal equation group
Normal equation group listed above is solved, determining equation group coefficient a is obtained0、a1、a2, and then obtain the meter of required gravity Y
Calculate formula
X is that the gravity Y of unknown magnitude is applied to the telemetering output valve obtained after single-point weighing system in formula, and X unit is volt,
Y unit is newton.
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