CN116481617A - Weighing system and nonlinear adjustment method - Google Patents

Weighing system and nonlinear adjustment method Download PDF

Info

Publication number
CN116481617A
CN116481617A CN202210049395.9A CN202210049395A CN116481617A CN 116481617 A CN116481617 A CN 116481617A CN 202210049395 A CN202210049395 A CN 202210049395A CN 116481617 A CN116481617 A CN 116481617A
Authority
CN
China
Prior art keywords
weighing system
beam sensor
inclination angle
nonlinearity
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210049395.9A
Other languages
Chinese (zh)
Inventor
杨莉
许磊
林鸿志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mettler Toledo Changzhou Measurement Technology Ltd
Mettler Toledo International Trading Shanghai Co Ltd
Mettler Toledo Changzhou Precision Instruments Ltd
Original Assignee
Mettler Toledo Changzhou Measurement Technology Ltd
Mettler Toledo International Trading Shanghai Co Ltd
Mettler Toledo Changzhou Precision Instruments Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mettler Toledo Changzhou Measurement Technology Ltd, Mettler Toledo International Trading Shanghai Co Ltd, Mettler Toledo Changzhou Precision Instruments Ltd filed Critical Mettler Toledo Changzhou Measurement Technology Ltd
Priority to CN202210049395.9A priority Critical patent/CN116481617A/en
Publication of CN116481617A publication Critical patent/CN116481617A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G01G3/1416—Arrangements for correcting or for compensating for unwanted effects for non-linearity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Force In General (AREA)

Abstract

The invention relates to a weighing system and a nonlinear adjustment method. The nonlinear adjustment method of the weighing system comprises the following steps: the weighing system meets the nonlinear condition, and when the beam sensor is not loaded with stress, the inclination angle formed by the beam sensor and the horizontal plane or the vertical plane is alpha; and obtaining the relation between the nonlinearity of the weighing system and the inclination angle alpha according to the nonlinearity condition, and selecting the inclination angle alpha so that the nonlinearity of the weighing system meets the weighing precision requirement of the weighing system. The weighing system and the nonlinear adjusting method provided by the invention can effectively improve the nonlinearity of the weighing system.

Description

Weighing system and nonlinear adjustment method
Technical Field
The invention relates to the technical field of dynamic weighing, in particular to a weighing system and a nonlinear adjustment method.
Background
The nonlinearity of the load cell or the weighing system is a very important metric. According to the requirements of metering regulations, the integrated error of the linear hysteresis of the weighing sensor and the weighing system needs to meet the specified precision requirement. If the nonlinearity of the load cell or the weighing system is too large, it is difficult to meet the corresponding accuracy requirements even if other properties such as hysteresis are very good. For a resistance strain gauge weighing sensor, the nonlinear influence factors mainly include: elastomeric structures, strain gages, sensor assemblies (e.g., bearing heads), bonding surfaces for sensor mounting, non-linearities of the elastomeric material, and the like. Various influencing factors together determine the nonlinear performance of the sensor. The nonlinearity of a weighing system depends on the nonlinearity of its core component load cell and the nonlinearity of other related components in the system in which the load cell is installed. But the linear hysteresis performance of either the weighing system or its core component load cell needs to meet the requirements of the corresponding metering regulations.
Typically the structural nonlinearity of the sensor dominates. Due to the characteristics of the resistance strain gauge weighing sensor, a weighing signal is derived from strain gauge strain output generated by structural deformation caused by load bearing of the sensor. As the load increases, the amount of deformation of the sensor elastic element increases. In the case of a beam-type resistive strain gauge sensor, the amount of change in strain output due to the increase in load due to the nonlinearity of the deformation of the elastomer structure changes with the increase in load, and thus the nonlinearity of the output signal of the resistive strain gauge sensor is caused, resulting in a weighing error.
In the design and production of practical resistance strain beam sensors, certain capacity, especially large capacity sensors, often suffer from nonlinear oversteps, and the means for adjusting the nonlinearity of the sensor is usually to redesign the structure of the elastic element, which has great limitations. Therefore, in addition to adjusting the structure of the elastic element, a method capable of adjusting the nonlinearity of the load cell is important.
For weighing systems that include resistive strain gauge weighing cells, the nonlinearity of the weighing cell itself is only one of the sources of nonlinearity of the weighing system. If the load cell meets the requirements of the corresponding precision level specified by the metering rule, the nonlinearity of the whole weighing system is excessively poor due to the excessively large nonlinearity introduced by components such as a system base and the like.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a weighing system and a nonlinear adjustment method, which can effectively improve the nonlinearity of the weighing system.
Specifically, the invention provides a nonlinear adjustment method of a weighing system, wherein the weighing system comprises a resistance strain gauge type beam sensor, and the adjustment method comprises the following steps:
the weighing system meets a nonlinear condition, and when the beam sensor is not loaded with stress, the inclination angle formed by the beam sensor and a horizontal plane or a vertical plane is alpha;
and obtaining the relation between the nonlinearity of the weighing system and the inclination angle alpha according to the nonlinearity condition, and selecting the inclination angle alpha so that the nonlinearity of the weighing system meets the weighing precision requirement of the weighing system.
According to one embodiment of the invention, the nonlinear condition comprises a nonlinear formula:
wherein, when the beam sensor is fully loaded, the inclination angle of the elastic element of the beam sensor is beta, and when the beam sensor is half loaded, the inclination angle of the elastic element of the beam sensor is beta/2.
According to one embodiment of the invention, the nonlinear condition comprises:
under the action of the excitation voltage u, the wheatstone bridge output voltage of the beam sensor can be expressed as follows according to kirchhoff's current law:
wherein the method comprises the steps ofSetting the initial resistance values of four resistance strain gauges on the sensor to be equal, wherein the initial resistance values are expressed as: r is R 1 ＝R 2 ＝R 3 ＝R 4 ＝R；
Conversion formula 2 obtains:
under a load state, the resistance value of the resistance strain gauge changes, which is expressed as: R+ΔR 1 ；R+ΔR 2 ；R+ΔR 3 ；R+ΔR 4 ；
The relation between the resistance change of the resistance strain gauge and the strain of the resistance strain gauge is as follows:
wherein K is the sensitivity coefficient of the resistance strain gauge, epsilon 1 ～ε 4 Strain for four of the resistive strain gauges;
substituting equation 4 into equation 3 yields:
according to the nonlinear definition of the weighing system:
changing the inclination angle alpha of the sensor and the horizontal plane or the vertical plane in a finite element model, and applying half load and full load on the sensor to obtain the strain epsilon of four resistance strain gauges of the sensor under the half load and the full load 1 ～ε 4 And respectively carrying out formula 5 to obtain half-load and full-load output under the corresponding inclination angle alpha, and calculating the nonlinearity under the corresponding inclination angle alpha according to formula 6.
According to one embodiment of the invention, the inclination angle α is selected in the range of-10 ° or more α < 0 ° or 0 < α < 10 °.
The invention also provides a weighing system which comprises the resistance strain gauge type beam sensor and a mounting part, wherein the beam sensor is arranged by adopting the adjusting method, and the mounting end of the beam sensor is matched and fixed with the mounting surface of the mounting part so that the beam sensor forms an inclination angle alpha with a horizontal plane or a vertical plane.
According to one embodiment of the invention the inclination of the mounting end surface is adjusted such that the beam sensor forms an inclination angle α with the horizontal or vertical plane.
According to one embodiment of the invention, the inclination of the mounting surface is adjusted such that the beam sensor forms an inclination angle α with the horizontal or vertical plane.
According to one embodiment of the invention, the weighing system further comprises a wedge-shaped spacer arranged between the beam sensor and the mounting part such that the beam sensor forms an inclination angle α with a horizontal or vertical plane.
According to the weighing system and the nonlinear adjusting method, the nonlinearity of the weighing system is effectively improved by adjusting the inclination angle of the beam sensor.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the accompanying drawings:
fig. 1 shows a schematic diagram of stress and deformation during installation of a prior art resistance strain gauge beam sensor.
Fig. 2 shows a schematic diagram of the nonlinear variation of the resistance strain gauge beam sensor under different loads and different inclination angles.
Fig. 3 shows a flow chart of a method of adjusting the nonlinearity of a weighing system according to an embodiment of the present invention.
Fig. 4 shows a schematic diagram of a weighing system according to an embodiment of the invention.
Fig. 5 shows a schematic structural diagram of a weighing system according to another embodiment of the invention.
Fig. 6 shows a schematic structural diagram of a weighing system according to another embodiment of the invention.
Fig. 7 shows a schematic structural diagram of a weighing system according to another embodiment of the present invention.
Fig. 8 shows a schematic structural diagram of a weighing system according to another embodiment of the invention.
Wherein the above figures include the following reference numerals:
weighing system 400
Beam sensor 401
Mounting portion 402
Mounting end 403
Mounting face 404
Load bearing end 405
Carrier 406
Wedge gasket 407
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present application, it should be understood that, where azimuth terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., indicate azimuth or positional relationships generally based on those shown in the drawings, only for convenience of description and simplification of the description, these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application. Furthermore, although terms used in the present application are selected from publicly known and commonly used terms, some terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Furthermore, it is required that the present application be understood, not simply by the actual terms used but by the meaning of each term lying within.
Fig. 1 shows a schematic diagram of stress and deformation during installation of a prior art resistance strain gauge beam sensor. Referring to fig. 1, taking a dual-hole parallel beam sensor as an example, fig. 1 shows stress and deformation of the dual-hole parallel beam sensor when the dual-hole parallel beam sensor is obliquely installed. The beam sensor is mounted obliquely at an angle alpha to the horizontal plane, and when the beam sensor is fully loaded, the inclination angle of the elastic element of the beam sensor due to loading stress deformation is beta, and when the beam sensor is half loaded, the inclination angle of the elastic element of the beam sensor is approximately beta/2.
Fig. 2 shows a schematic diagram of the nonlinear variation of the resistance strain gauge beam sensor under different loads and different inclination angles. Referring to fig. 2, the horizontal axis of the graph reflects the variation of the load, the vertical axis reflects the variation of the nonlinearity, and each curve in the graph represents the relationship of the beam sensor with respect to the nonlinearity at different tilt angles α and at different loads.
Fig. 3 shows a flow chart of a method of adjusting the nonlinearity of a weighing system according to an embodiment of the present invention. A method of adjusting the nonlinearity of a weighing system is provided as shown. Wherein the weighing system comprises a resistive strain gauge beam sensor. The adjusting method comprises the following steps:
the weighing system meets the nonlinear condition, and when the beam sensor is not loaded with stress, the inclination angle formed by the beam sensor and the horizontal plane or the vertical plane is alpha;
and obtaining the relation between the nonlinearity of the weighing system and the inclination angle alpha according to the nonlinearity condition, and selecting the inclination angle alpha so that the nonlinearity of the weighing system meets the weighing precision requirement of the weighing system.
Preferably, the nonlinear condition includes a nonlinear formula:
referring to fig. 1, when the beam sensor is not loaded with a force, the beam sensor forms an inclination angle alpha with a horizontal plane or a vertical plane; the angle of inclination of the elastic element of the beam sensor is beta when the beam sensor is fully loaded and beta/2 when the beam sensor is half loaded.
And obtaining the relation between the nonlinearity of the weighing system and the inclination angle alpha according to a formula 1, and selecting the inclination angle alpha in combination with the illustration of fig. 2 so that the nonlinearity of the weighing system meets the weighing precision requirement of the weighing system.
Preferably, the nonlinear condition includes:
under the action of the excitation voltage u, the wheatstone bridge output voltage of the beam sensor can be expressed as follows according to kirchhoff's current law:
the initial resistance values of the four resistance strain gauges on the sensor are set to be equal, and the initial resistance values are expressed as follows:
R 1 ＝R 2 ＝R 3 ＝R 4 ＝R；
conversion formula 2 obtains:
under a load state, the resistance value of the resistance strain gauge changes, and the resistance value is expressed as: R+ΔR 1 ；R+ΔR 2 ；R+ΔR 3 ；R+ΔR 4 ；
The relation between the resistance change of the resistance strain gauge and the strain thereof is as follows:
wherein K is the sensitivity coefficient of the resistance strain gauge, ε 1 ～ε 4 Strain for four resistance strain gauges;
substituting equation 4 into equation 3 yields:
according to the nonlinear definition of the weighing system:
altering sensor and in finite element modelThe inclination angle alpha of the horizontal plane or the vertical plane applies half load and full load on the beam type sensor to obtain the strain epsilon of four resistance strain gauges of the beam type sensor when the beam type sensor is half load and full load 1 ～ε 4 And respectively carrying out formula 5 to obtain half-load and full-load output under the corresponding inclination angle alpha, and calculating the nonlinearity under the corresponding inclination angle alpha according to formula 6.
Preferably, according to the nonlinear adjustment method of the weighing system, the inclination angle alpha is selected from the range of-10 degrees less than or equal to alpha less than 0 degrees or 0 degrees less than or equal to alpha less than 10 degrees.
Fig. 4 shows a schematic diagram of a weighing system according to an embodiment of the invention. As shown, the present invention also provides a weighing system 400. The weighing system 400 includes a resistive strain gauge beam sensor 401 and a mounting portion 402. The weighing system 400 employs the adjustment method described above to provide the beam sensor 401. The mounting end 403 of the beam sensor 401 is cooperatively secured to the mounting surface 404 of the mounting portion 402 such that the beam sensor 401 forms an inclination angle α with a horizontal or vertical plane. In the present embodiment, one end of the beam sensor 401 is provided as a mounting end 403, and the bottom surface of the mounting end 403 is fixed in up-down fit with the top surface of the mounting surface 404 of the mounting portion 402. The inclination of the surface of the mounting end 403 of the beam sensor 401 is adjusted such that the beam sensor 401 forms an inclination angle alpha with the horizontal plane of 0 < alpha < 10 deg.. The other end of the beam sensor 401 is provided as a carrier end 405. The weighing system 400 further includes a carrying portion 406 disposed on the carrying end 405. The load carrying end 405 of the beam sensor 401 is loaded with a weighing object via the load carrying part 406.
Fig. 5 shows a schematic structural diagram of a weighing system 400 according to another embodiment of the invention. In the present embodiment, one end of the beam sensor 401 is provided as a mounting end 403, and the bottom surface of the mounting end 403 is fixed in up-down fit with the top surface of the mounting surface 404 of the mounting portion 402. The inclination of the surface of the mounting surface 404 of the mounting portion 402 is adjusted so that the beam sensor 401 forms an inclination angle α with respect to the horizontal plane of 0 < α.ltoreq.10°. The other end of the beam sensor 401 is provided as a carrier end 405. The weighing system 400 further includes a carrying portion 406 disposed on the carrying end 405. The load carrying end 405 of the beam sensor 401 is loaded with a weighing object via the load carrying part 406.
Fig. 6 shows a schematic structural diagram of a weighing system 400 according to another embodiment of the invention. Preferably, the weighing system 400 further comprises a wedge-shaped spacer 407. Wedge-shaped shims 407 are arranged between the beam sensor 401 and the mounting portion 402 such that the beam sensor 401 forms an inclination angle α with the horizontal or vertical plane. In the present embodiment, one end of the beam sensor 401 is provided as a mounting end 403, and the bottom surface of the mounting end 403 is fixed by vertically fitting with the top surface of the mounting surface 404 of the mounting portion 402 via a wedge washer 407. The appropriate wedge-shaped shims 407 are selected so that the beam sensor 401 forms an inclination angle α with the horizontal plane of 0 < α.ltoreq.10° or-10.ltoreq.α < 0 °. The other end of the beam sensor 401 is provided as a carrier end 405. The weighing system 400 further includes a carrying portion 406 disposed on the carrying end 405. The load carrying end 405 of the beam sensor 401 is loaded with a weighing object via the load carrying part 406.
Fig. 7 shows a schematic diagram of a weighing system 400 according to another embodiment of the invention. In the present embodiment, one end of the beam sensor 401 is provided as a mounting end 403, and the bottom surface of the mounting end 403 is fixed in up-down fit with the top surface of the mounting surface 404 of the mounting portion 402. The inclination of the surface of the mounting surface 404 or the bottom surface of the mounting end 403 of the mounting portion 402 is adjusted so that the beam sensor 401 forms an inclination angle α, -10° or less α < 0 ° with respect to the horizontal plane. The other side of the beam sensor 401 is provided as a carrier end 405. The weighing system 400 further includes a carrier 406 disposed on a surface of the carrier end 405. The load carrying end 405 of the beam sensor 401 is loaded with a weighing object via the load carrying part 406.
Fig. 8 shows a schematic structural diagram of a weighing system 400 according to another embodiment of the invention. In the present embodiment, the beam sensor 401 is provided with a mounting end 403, and the side surface of the mounting end 403 is fixed to the side surface of the mounting surface 404 of the mounting portion 402 in a right-left fit. The inclination of the surface of the mounting surface 404 of the mounting portion 402 is adjusted so that the beam sensor 401 forms an inclination angle α with the vertical plane of 0 < α.ltoreq.10° or-10.ltoreq.α < 0 °. The other side of the beam sensor 401 is provided as a carrier end 405. The weighing system 400 further includes a carrier 406 disposed on a surface of the carrier end 405. The load carrying end 405 of the beam sensor 401 is loaded with a weighing object via the load carrying part 406.
According to the weighing system and the nonlinear adjustment method, after weighing deformation, the beam sensor is utilized, structural nonlinearity caused by large deformation is properly utilized in the process of deformation from zero to maximum deformation, and nonlinearity of a weighing output signal in the weighing system is effectively improved, so that the nonlinearity of the beam sensor and the weighing system is improved, and the accuracy requirement is met.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (8)

1. A method of adjusting nonlinearity of a weighing system comprising a resistive strain gauge beam sensor, the adjustment method comprising:
the weighing system meets a nonlinear condition, and when the beam sensor is not loaded with stress, the inclination angle formed by the beam sensor and a horizontal plane or a vertical plane is alpha;
and obtaining the relation between the nonlinearity of the weighing system and the inclination angle alpha according to the nonlinearity condition, and selecting the inclination angle alpha so that the nonlinearity of the weighing system meets the weighing precision requirement of the weighing system.
2. The method of adjusting for non-linearities of a weighing system according to claim 1, wherein the non-linearity condition comprises a non-linear formula:
wherein, when the beam sensor is fully loaded, the inclination angle of the elastic element of the beam sensor is beta, and when the beam sensor is half loaded, the inclination angle of the elastic element of the beam sensor is beta/2.
3. The method of adjusting for non-linearities of a weighing system according to claim 1, wherein the non-linearity condition comprises:
under the action of the excitation voltage u, the wheatstone bridge output voltage of the beam sensor can be expressed as follows according to kirchhoff's current law:
the initial resistance values of the four resistance strain gauges on the sensor are set to be equal, and the initial resistance values are expressed as follows: r is R 1 ＝R 2 ＝R 3 ＝R 4 ＝R；
Conversion formula 2 obtains:
under a load state, the resistance value of the resistance strain gauge changes, which is expressed as: R+ΔR 1 ；R+ΔR 2 ；R+ΔR 3 ；R+ΔR 4 ；
The relation between the resistance change of the resistance strain gauge and the strain of the resistance strain gauge is as follows:
wherein K is the sensitivity coefficient of the resistance strain gauge, epsilon 1 ～ε 4 Strain for four of the resistive strain gauges;
substituting equation 4 into equation 3 yields:
according to the nonlinear definition of the weighing system:
changing the inclination angle alpha of the sensor and the horizontal plane or the vertical plane in a finite element model, and applying half load and full load on the sensor to obtain the strain epsilon of four resistance strain gauges of the sensor under the half load and the full load 1 ～ε 4 And respectively carrying out formula 5 to obtain half-load and full-load output under the corresponding inclination angle alpha, and calculating the nonlinearity under the corresponding inclination angle alpha according to formula 6.
4. A method of adjusting the nonlinearity of a weighing system according to claim 2 or 3, wherein the tilt angle α is selected in the range of-10 ° +.ltoreq.0° or 0 < α+.ltoreq.10 °.
5. A weighing system comprising a resistive strain gauge beam sensor and a mounting portion, the weighing system employing the adjustment method of any one of claims 1 to 4 to provide the beam sensor, the mounting end of the beam sensor being cooperatively secured to the mounting surface of the mounting portion such that the beam sensor forms an inclination angle α with a horizontal or vertical plane.
6. The weighing system of claim 5 wherein the inclination of said mounting end surface is adjusted such that said beam sensor forms an inclination angle α with a horizontal or vertical plane.
7. A weighing system according to claim 5, wherein the inclination of said mounting surface is adjusted such that said beam sensor forms an inclination angle α with a horizontal or vertical plane.
8. The weighing system of claim 5 further comprising a wedge-shaped spacer disposed between said beam sensor and the mounting portion such that said beam sensor forms an inclination angle α with a horizontal or vertical plane.
CN202210049395.9A 2022-01-17 2022-01-17 Weighing system and nonlinear adjustment method Pending CN116481617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210049395.9A CN116481617A (en) 2022-01-17 2022-01-17 Weighing system and nonlinear adjustment method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210049395.9A CN116481617A (en) 2022-01-17 2022-01-17 Weighing system and nonlinear adjustment method

Publications (1)

Publication Number Publication Date
CN116481617A true CN116481617A (en) 2023-07-25

Family

ID=87221968

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210049395.9A Pending CN116481617A (en) 2022-01-17 2022-01-17 Weighing system and nonlinear adjustment method

Country Status (1)

Country Link
CN (1) CN116481617A (en)

Similar Documents

Publication Publication Date Title
US7478001B2 (en) Systems and methods for temperature-compensated measuring of a load
US10641643B2 (en) Load cell assembly having a flexural arrangement
US3949603A (en) Strain gage transducer
CN106500902B (en) A kind of strain-type multidimensional force sensor with from decoupling function
KR101230875B1 (en) Bending type wheel dynamometer
Tavakolpour-Saleh et al. A novel multi-component strain-gauge external balance for wind tunnel tests: Simulation and experiment
US9791332B2 (en) Rod-shaped force transducer with improved deformation behavior
CN108981983A (en) Tire-road three-dimensional force measuring sensors
US20170211965A1 (en) Low-profile load cell assembly
US10067009B2 (en) Rod-shaped force transducer with simplified adjustment
JP2003035639A (en) Method and apparatus for characteristic test to compression spring
JP5084326B2 (en) Load cell unit and weighing device
JP4708897B2 (en) Load detection device
CN116481617A (en) Weighing system and nonlinear adjustment method
CN106679777A (en) Electronic scale temperature compensation device and compensation method thereof
CN110333023B (en) Strain type tire road three-dimensional stress measuring device and measuring method thereof
JPS63273028A (en) Weight detector
CN204241078U (en) Multichannel digital uneven loading error intelligence revises single beam type LOAD CELLS
CN109696262A (en) A kind of ultrathin type strain force sensor
CN211234647U (en) Five-column type weighing sensor
US20050081652A1 (en) Load Cell Having Improved Linearity and Temperature Transient Behavior
JP2006084239A (en) Load cell
CN218121133U (en) Weighing platform device weighs
CN213209327U (en) Three-dimensional force sensor
CN206598765U (en) A kind of electric automobile weighing system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination