CN112729655B - Straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor - Google Patents
Straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor Download PDFInfo
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- CN112729655B CN112729655B CN202011617632.4A CN202011617632A CN112729655B CN 112729655 B CN112729655 B CN 112729655B CN 202011617632 A CN202011617632 A CN 202011617632A CN 112729655 B CN112729655 B CN 112729655B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
- G01L5/169—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using magnetic means
Abstract
The invention discloses a straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor, which comprises: the bending moment force-bearing connector comprises a bending moment force-bearing connector, an upper fixing plate, a first bending moment fixing element, an upper first ball element fixing body, an upper bending moment movable ball, an upper second ball element fixing body, a bending moment detection element, an upper supporting sleeve, a second bending moment fixing element, a middle bending moment fixing plate, a middle supporting sleeve, an axial force detection element, a middle fixing plate, a lower fixing plate, a torque detection element, a lower torsion supporting element, a lower supporting sleeve, a torque force-bearing plate, a middle copper bead with holes and an upper copper bead with holes. The invention can simultaneously detect the bending force component and the pulling pressure component in the coupling force, namely, the structural decoupling is carried out on the coupling force; and does not need to be connected into a power supply line or collect data through a wired interface; the method is applied to the fields of machine tools, biology and medicine, can greatly reduce the problem that a plurality of wired transmissions are needed when the sensor outputs data, and greatly promotes the simplicity of information transmission.
Description
Technical Field
The invention relates to a straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor, and belongs to the technical field of sensors.
Background
The sensor is generally composed of a sensing element and an elastic element. The multi-dimensional force sensor is a force measuring sensor capable of simultaneously detecting force and moment information in three directions and above, and is widely applied to the fields of robots, industrial manufacturing, medical treatment and health, bioengineering and the like.
The three-dimensional and even multidimensional force sensors at the present stage are mainly divided into resistance strain type, piezoelectric type and capacitance type force sensors, and the three-dimensional and even multidimensional force sensors are simple in structure, sensitive and high in precision. The sensor is constructed by attaching or otherwise mounting a strain sensitive element to a shaped elastic element. When force acts on the sensor, the elastic element in the sensor deforms, the strain sensitive element mounted on the elastic element also deforms, the resistance value of the strain sensitive element changes along with the deformation of the elastic element, and then the change of the resistance value is converted into voltage change output through the conversion circuit, so that the force can be determined according to the voltage change.
However, in the prior art, when the sensor is subjected to torsional stress, bending stress and tensile and compressive stress at the same time, the existing solution is to compensate and decouple the strain gauge by forming the strain gauge into a bridge circuit, and the mechanical structure does not have the decoupling capability of realizing the torsional stress, the bending stress and the tensile and compressive stress.
The existing three-dimensional/multidimensional sensor requires to use a conducting wire to monitor the voltage change in real time due to the structural characteristics of the sensor, and even if the wireless sensor is used for information transmission, the capacity of a battery is limited, so that the wireless passive long-term dynamic monitoring of the signal change cannot be realized.
Disclosure of Invention
The present invention aims to provide a straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor which solves at least one of the above mentioned technical problems.
The technical scheme adopted by the invention for solving the technical problems is as follows: a straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor comprises: the bending moment force-bearing connector comprises a bending moment force-bearing connector, an upper fixing plate, a first bending moment fixing element, an upper first ball element fixing body, an upper bending moment movable ball, an upper second ball element fixing body, a bending moment detection element, an upper supporting sleeve, a second bending moment fixing element, a middle bending moment fixing plate, a middle supporting sleeve, an axial force detection element, a middle fixing plate, a lower fixing plate, a torque detection element, a lower torsion supporting element, a lower supporting sleeve, a torque force-bearing plate, a middle copper bead with holes and an upper copper bead with holes;
the bending moment bearing joint is slidably arranged in a central hole of the first bending moment fixing element, and the first bending moment fixing element limits the rotation of the bending moment bearing joint;
the upper first ball element fixing body is provided with a central through hole along an axis, the lower surface of the upper first ball element fixing body is provided with an upper ball socket, the upper ball socket is communicated with the central through hole, the upper second ball element fixing body is fixed on the upper first ball element fixing body, the upper surface of the upper second ball element fixing body is provided with a lower ball socket, the lower ball socket of the upper second ball element fixing body and the upper ball socket of the upper first ball element fixing body jointly form an accommodating space for accommodating the upper bending moment movable ball, the upper bending moment movable ball is arranged in the accommodating space, and the lower end of the bending moment bearing joint penetrates through the central through hole and is fixed on the upper bending moment movable ball;
the lower end of the upper second ball element fixing body is fixed with the upper end of an axial force detection element, and the lower end of the axial force detection element is fixed on the middle fixing plate; the axial force detection element is adhered with a magnetostrictive material;
the lower end of the middle supporting sleeve is fixed on the middle fixing plate, and the upper end of the middle supporting sleeve is fixed with a middle bending moment fixing plate;
the lower end of the upper supporting sleeve is fixed on the upper surface of the middle bending moment fixing plate, and the upper end of the upper supporting sleeve is fixed with an upper fixing plate;
the upper fixing plate is provided with a central hole along the axis of the upper fixing plate, and the axis of the central hole of the upper fixing plate is superposed with the axis of the bending moment bearing joint; the diameter of the central hole of the upper fixing plate is larger than that of the upper end of the bending moment bearing joint;
the bending moment detection elements are at least three and comprise an upper thread section, an upper fixing part, a detection part, a lower fixing part and a lower thread section which are sequentially connected, wherein the upper fixing part and the lower fixing part are cylindrical, and the detection part is flat; and a magnetostrictive material is adhered to the detection part;
the first bending moment fixing element is provided with a first through hole, the diameter of the first through hole is larger than the diameter of an upper threaded section of the bending moment detection element and smaller than the diameter of an upper fixing part, the upper threaded section is provided with a nut, and the first bending moment fixing element is arranged between the upper fixing part of the bending moment detection element and the nut;
the upper fixing plate is provided with a through hole, the through hole of the upper fixing plate is formed into a chamfer, an upper thread section of the bending moment detection element penetrates through the through hole of the upper fixing plate, an upper copper bead with holes is arranged on the part of the upper thread section above the upper fixing plate, and the upper copper bead with holes is arranged in the chamfer of the through hole of the upper fixing plate;
the center of the middle bending moment fixing plate is provided with a center hole, and the upper second ball element fixing body is slidably arranged in the center hole of the middle bending moment fixing plate;
the second bending moment fixing element is arranged on the middle bending moment fixing plate, a central hole is formed in the middle of the second bending moment fixing element, and the upper second ball element fixing body is slidably arranged in the central hole of the second bending moment fixing element;
the second bending moment fixing element is provided with a through hole, and the diameter of the through hole of the second bending moment fixing element is larger than that of the lower thread section of the bending moment detection element and smaller than that of the lower fixing part.
A through hole is formed in the middle bending moment fixing plate, the diameter of the through hole of the middle bending moment fixing plate is larger than that of the lower thread section of the bending moment detection element, the lower end of the through hole of the middle bending moment fixing plate is in a chamfer shape, the lower thread section of the bending moment detection element penetrates through the through hole of the second bending moment fixing element and the through hole of the middle bending moment fixing plate, and a middle copper bead with holes is arranged on the part, located at the lower part of the middle bending moment fixing plate, of the lower thread section of the bending moment detection element and is positioned in a chamfer of the through hole of the middle bending moment fixing plate;
the lower fixing plate is fixed on the middle fixing plate, and a central hole is formed in the lower fixing plate along the axis of the lower fixing plate; the lower torsion support member includes a cylindrical portion and a flange formed at an upper end of the cylindrical portion, the cylindrical portion of the lower torsion support member is inserted into the central hole of the lower fixing plate, and the flange of the lower torsion support member is disposed between the middle fixing plate and the lower fixing plate;
two upper mounting holes are formed in the lower fixing plate along the axial direction of the lower fixing plate, an upper threaded hole is formed in the lower fixing plate along the radial direction of the lower fixing plate, and the upper mounting holes of the lower fixing plate are vertically intersected with the upper threaded hole of the lower fixing plate;
the upper end of the torque detection element is arranged in the upper mounting hole, and an upper screw which is screwed into an upper threaded hole of the lower fixing plate penetrates through the upper end of the torque detection element to limit the radial position of the torque detection element;
the torque bearing plate is fixed at the lower end of the lower torsion supporting element, two lower mounting holes are formed in the torque bearing plate along the axial direction of the torque bearing plate, two lower threaded holes are formed in the torque bearing plate along the radial direction of the torque bearing plate, and the lower mounting holes are vertically intersected with the lower threaded holes;
the lower end of the torque detection element is arranged in the lower mounting hole, and a lower screw screwed into the lower threaded hole penetrates through the lower end of the torque detection element to limit the radial position of the torque detection element; a magnetostrictive material is adhered on the torque detection element;
the upper end of the lower supporting sleeve is fixed on the lower fixing plate.
Optionally, the bending moment force-bearing joint includes a disk portion, a first protrusion disposed on a lower surface of the disk portion, and a screw formed at a lower end of the first protrusion, and the central through hole of the first bending moment fixing element is matched with the first protrusion.
Optionally, the cross section of the first protrusion and the cross section of the central hole of the first bending moment fixing element are both rectangular with rounded corners.
Optionally, the disc part, the first protrusion and the screw have the same axial line.
Optionally, a middle portion of the axial force detecting element is thinner than upper and lower ends of the axial force detecting element, and a magnetostrictive material is adhered to the middle portion of the axial force detecting element.
Optionally, the diameter of the central through hole of the upper first ball element fixing body is larger than the diameter of the lower end of the bending moment force-bearing joint.
Optionally, the material of the middle support sleeve is acrylic.
Optionally, the upper support sleeve is made of acrylic.
Optionally, the number of the bending moment detection elements is four.
Optionally, the upper bending moment movable ball is in clearance fit with the upper first ball element fixing body and the upper second ball element fixing body.
The invention has the following beneficial effects: the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor can simultaneously detect the bending force component and the pulling pressure component in the coupling force, namely, the coupling force is structurally decoupled; and does not need to be connected into a power supply line or collect data through a wired interface; the method is applied to the fields of machine tools, biology and medicine, can greatly reduce the problem that a plurality of wired transmissions are needed when the sensor outputs data, and greatly promotes the simplicity of information transmission.
Drawings
Fig. 1 is a schematic view of a three-dimensional structure of a straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor.
FIG. 2 is a cross-sectional view of a three-dimensional structure of a straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor.
Fig. 3 is a quarter sectional view of a three-dimensional structure of the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor.
Fig. 4 is an exploded view of a three-dimensional structure part of the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor.
Fig. 5 is a disassembled quarter sectional view of a three-dimensional structure of the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor.
FIG. 6 is an exploded view of a three-dimensional structure part of a bending moment force-sensitive area of the straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor.
FIG. 7 is a three-dimensional structural section view of a bending moment force-sensitive area of the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor.
Fig. 8 is an exploded view of the components of the axial force-receiving sensitive area of the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor.
Fig. 9 is a perspective structural sectional view of an axial force-sensitive area of the straight-cylinder T-shaped inter-dimension decoupling three-dimensional wireless passive sensor of the invention.
Fig. 10 is an exploded view of the three-dimensional structure of the torque force-sensitive area of the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor according to the present invention.
Fig. 11 is a perspective structural section view of a torque force sensitive area of the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor of the invention.
The notation in the figures means: 1-bending moment bearing joint; 2-upper fixing plate; 3-a first bending moment fixing element; 4-an upper first ball element fixture; 5-upper bending moment movable ball; 6-an upper second ball element fixture; 7-bending moment detection element; 8-an upper support sleeve; 9-a second bending moment fixing element; 10-middle bending moment fixing plate; 11-a middle support sleeve; 12-an axial force detection element; 13-a middle fixing plate; 14-lower fixed plate; 15-a torque sensing element; 16-a lower torsion support element; 17-a lower support sleeve; 18-torque force bearing plate; 19-copper beads with holes on the upper part; 20-copper beads with holes in the middle.
Detailed Description
The technical solution of the present invention is further described below with reference to the following embodiments and the accompanying drawings.
Example 1
The embodiment provides a three-dimensional wireless passive sensor of decoupling zero between straight section of thick bamboo T type dimension, especially a wireless passive force/moment sensor of decoupling zero between straight section of thick bamboo T type dimension, and it includes: the bending moment force-bearing connector comprises a bending moment force-bearing connector 1, an upper fixing plate 2, a first bending moment fixing element 3, an upper first ball element fixing body 4, an upper bending moment movable ball 5, an upper second ball element fixing body 6, a bending moment detection element 7, an upper supporting sleeve 8, a second bending moment fixing element 9, a middle bending moment fixing plate 10, a middle supporting sleeve 11, an axial force detection element 12, a middle fixing plate 13, a lower fixing plate 14, a torque detection element 15, a lower torsion supporting element 16, a lower supporting sleeve 17, a torque force-bearing plate 18, a middle copper bead with holes 20 and an upper copper bead with holes 19.
The bending moment force bearing joint 1 comprises a disc part, a first bump arranged on the lower surface of the disc part and a screw formed at the lower end of the first bump, wherein the cross section of the first bump is rectangular, preferably, four feet of the rectangular bump can be formed into round corners, namely, the cross section of the first bump is rectangular with round corners.
The outer surface of the screw is formed into a male thread, and the disk part, the first lug and the axis of the screw are on the same straight line.
The center of the first bending moment fixing element 3 is provided with a center through hole matched with the cross section of the first bump, the first bump is slidably arranged in the center through hole of the first bending moment fixing element 3, so that the bending moment force-bearing joint 1 can axially move relative to the first bending moment fixing element 3, and the rotation of the bending moment force-bearing joint 1 is limited by the first bending moment fixing element 3. Preferably, the contact surface between the first bending moment fixing element 3 and the bending moment bearing joint 1 can be lubricated by adding grease.
Preferably, the bending moment force-bearing joint 1 is in clearance fit with the first bending moment fixing element 3, so that the bending moment force-bearing joint 1 can move axially relative to the first bending moment fixing element 3 by a small axial force.
An upper bending moment movable ball 5 is fixed at the lower end of the bending moment force bearing joint 1, wherein the upper bending moment movable ball 5 is integrally spherical and is provided with a threaded hole, and the upper bending moment movable ball 5 is fixed at the lower end of the bending moment force bearing joint 1 in a mode that a screw of the bending moment force bearing joint 1 is screwed into the threaded hole.
The upper first ball element fixing body 4 is provided with a central through hole along the axis of the upper first ball element fixing body 4, the lower surface of the upper first ball element fixing body 4 is provided with an upper ball socket, and the upper ball socket is communicated with the central through hole, in this embodiment, the diameter of the central through hole is larger than that of the screw of the bending moment force bearing joint 1, so that when the upper bending moment force bearing joint 5 is arranged in the ball socket of the upper first ball element fixing body 4, the screw of the bending moment force bearing joint 1 passes through the central through hole and is fixed on the upper bending moment force bearing ball 5.
The upper second ball element fixing body 6 is fixed to the upper first ball element fixing body 4, and a lower ball socket is opened on an upper surface of the upper second ball element fixing body 6, and the lower ball socket of the upper second ball element fixing body 6 and the upper ball socket of the upper first ball element fixing body 4 together form an accommodating space for accommodating the upper bending moment moving ball, so that the upper bending moment moving ball 5 is disposed in the accommodating space, and preferably, the upper bending moment moving ball 5 is in clearance fit with the upper first ball element fixing body 4 and the upper second ball element fixing body 6.
The upper end of the axial force detecting element 12 is fixed to the lower end of the upper second ball element fixing body 6, and the lower end of the axial force detecting element is fixed to the middle fixing plate 13.
In this embodiment, the axial force detection element 12 is integrally i-shaped, and the middle part is an axial force sensitive region, that is, the middle part of the axial force detection element 12 is thinner than the upper end and the lower end of the axial force detection element 12, so that the sensitivity of the straight-barrel T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor is higher, and a magnetostrictive material is adhered to the middle part (the axial force sensitive region) of the axial force detection element 12.
The lower end of the middle supporting sleeve 11 is fixed on the middle fixing plate 13, and the upper end of the middle supporting sleeve 11 is fixed with a middle bending moment fixing plate 10. In this embodiment, the material of the middle supporting sleeve 11 is acrylic, so as to reduce electromagnetic shielding.
Preferably, the middle supporting sleeve 11 is connected with the middle bending moment fixing plate 10 through screws, the middle supporting sleeve 11 is provided with eight threaded holes, four of the eight threaded holes are used for being matched with the middle fixing plate 13, the middle supporting sleeve 11 is connected with the middle fixing plate 13 through screws, and the other four threaded holes are used for being connected between the upper portion and the lower portion of the straight-barrel T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor.
The lower end of the upper supporting sleeve 8 is fixed on the upper surface of the middle bending moment fixing plate 10, and the upper end of the upper supporting sleeve 8 is fixed with the upper fixing plate 2. In this embodiment, the upper supporting sleeve 8 is made of acrylic material to reduce electromagnetic shielding.
The upper fixing plate 2 is provided with a center hole along the axis of the upper fixing plate 2, and the axis of the center hole of the upper fixing plate 2 is coincident with the axis of the bending moment bearing joint 1.
The diameter of the central hole of the upper fixing plate 2 is larger than that of the upper end disc of the bending moment bearing joint 1, and the bending moment bearing joint 1 can move in the central hole of the upper bending moment fixing plate 2.
The bending moment detecting elements 7 are at least three, for example, four bending moment detecting elements 7 may be provided in the present embodiment; in this embodiment, the bending moment detecting element 7 includes an upper threaded section, an upper fixing section, a detecting section, a lower fixing section, and a lower threaded section, which are connected in sequence, wherein the upper fixing section and the lower fixing section are cylindrical, and the detecting section is flat; so that the size of the sensing part is smaller than the size of the upper and lower fixing parts, and a magnetostrictive material is attached on the sensing part (bending moment sensitive area).
A first through hole is formed in the first bending moment fixing element 3, the diameter of the first through hole is larger than that of the upper thread section of the bending moment detection element 7 and smaller than that of the upper fixing portion, a nut is arranged on the upper thread section, and the first bending moment fixing element 3 is arranged between the upper fixing portion of the bending moment detection element 7 and the nut.
Preferably, the upper end of the first through-hole is formed as a chamfer, and the nut is located in the chamfer to limit the movement of the first bending moment fixing element 3 in the length direction of the bending moment detecting element 7 by the upper fixing portion of the bending moment detecting element 7 and the nut, and to allow a certain axial and radial movement of the first bending moment fixing element 3.
A through hole is formed in the upper fixing plate 2, the through hole of the upper fixing plate 2 is formed into a chamfer, an upper thread section of the bending moment detection element 7 penetrates through the through hole of the upper fixing plate 2, an upper copper bead 19 with holes is arranged on a part of the upper thread section above the upper fixing plate 2, and the upper copper bead 19 with holes is arranged in the chamfer of the through hole of the upper fixing plate 2.
Preferably, the diameter of the through hole of the upper fixing plate 2 is larger than the diameter of the upper threaded section of the bending moment detecting element 7, so that the bending moment detecting element 7 has a certain movement margin relative to the upper fixing plate 2.
A center hole is formed in the center of the middle bending moment fixing plate 10, the upper second ball element fixing body 6 is slidably disposed in the center hole of the middle bending moment fixing plate 10, and preferably, the upper second ball element fixing body 6 is in clearance fit with the middle bending moment fixing plate 10.
In this embodiment, the second bending moment fixing element 9 is disposed on the middle bending moment fixing plate 10, a central hole is formed in the middle of the second bending moment fixing element 9, the upper second ball element fixing body 6 is slidably disposed in the central hole of the second bending moment fixing element 9, and preferably, the upper second ball element fixing body 6 is in clearance fit with the second bending moment fixing element 9.
A through hole is formed in the second bending moment fixing element 9, and the diameter of the through hole of the second bending moment fixing element 9 is larger than that of the lower threaded section of the bending moment detection element 7 and smaller than that of the lower fixing part, so that the lower fixing part is abutted to the second bending moment fixing element 9.
The middle bending moment fixing plate 10 is provided with a through hole, the diameter of the through hole of the middle bending moment fixing plate 10 is larger than that of the lower thread section of the bending moment detection element 7, the lower end of the through hole of the middle bending moment fixing plate 10 is in a chamfer shape, the lower thread section of the bending moment detection element 7 penetrates through the through hole of the second bending moment fixing element 9 and the through hole of the middle bending moment fixing plate 10, the lower thread section of the bending moment detection element 7 is located at the lower part of the middle bending moment fixing plate 10 and is provided with a middle copper bead with holes 20, the middle copper bead with holes is located in the chamfer of the through hole of the middle bending moment fixing plate 10, and certain radial and axial movement allowance is provided for the bending moment detection element 7.
The lower fixing plate 14 is fixed to the middle fixing plate 13, and a central hole is formed in the lower fixing plate 14 along the axis of the lower fixing plate 14; the lower torsion supporting member 16 includes a cylindrical portion and a flange formed at an upper end of the cylindrical portion, the cylindrical portion of the lower torsion supporting member 16 is inserted into the central hole of the lower fixing plate 14, and the flange of the lower torsion supporting member 16 is disposed between the middle fixing plate 13 and the lower fixing plate 14.
Two upper mounting holes are formed in the lower fixing plate 14 along the axial direction of the lower fixing plate 14, an upper threaded hole is further formed in the lower fixing plate 14 along the radial direction of the lower fixing plate 14, and the upper mounting hole of the lower fixing plate 14 is perpendicularly intersected with the upper threaded hole of the lower fixing plate 14.
The number of the torque detection elements 15 is two, and the torque detection elements are respectively arranged corresponding to the upper mounting holes of the lower fixing plate 14; in the present disclosure, the upper end of the torque detecting element 15 is disposed in the upper mounting hole, and an upper screw screwed into an upper screw hole of the lower fixing plate 14 passes through the upper end of the torque detecting element 15, limiting the radial position of the torque detecting element 15. In this embodiment, an upper through hole is formed at the upper end of the torque detection element 15, and the diameter of the upper through hole is larger than that of the upper screw, so that a certain movement margin exists in the axial direction of the straight-cylinder T-shaped inter-dimension decoupling three-dimensional wireless passive sensor by the torque detection element 15, and the influence of the bending moment and the axial force on the torque detection element 15 is reduced.
The torque bearing plate 18 is fixed at the lower end of the lower torsion supporting element 16, preferably, two lower mounting holes are formed in the torque bearing plate 18 along the axial direction of the torque bearing plate 18, two lower threaded holes are also formed in the torque bearing plate 18 along the radial direction of the torque bearing plate 18, and the lower mounting holes and the lower threaded holes are vertically intersected;
the lower end of the torque detection element 15 is disposed in the lower mounting hole, and a lower screw screwed into the lower threaded hole passes through the lower end of the torque detection element 15, limiting the radial position of the torque detection element 15. In this embodiment, a lower through hole is formed at the lower end of the torque detection element 15, and the diameter of the lower through hole is larger than that of the lower screw, so that a certain movement margin exists in the axial direction of the straight-cylinder T-shaped inter-dimension decoupling three-dimensional wireless passive sensor by the torque detection element 15, and the influence of the bending moment and the axial force on the torque detection element 15 is reduced.
The thickness of the middle portion of the torque sensing element 15 is smaller than the thickness of the upper and lower ends of the torque sensing element, whereby a torque sensitive region is formed in the middle portion of the torque sensing element 15, and a magnetostrictive material is adhered to the middle portion of the torque sensing element 15, i.e., the torque sensitive region.
The upper end of the lower supporting sleeve 17 is fixed to the lower fixing plate 14, and a preset gap exists between the lower end of the lower supporting sleeve 17 and the torque bearing plate 18.
The lower torsion support member 16 is in surface contact with the lower stationary plate 14, and the contact surfaces may be lubricated by grease lubrication.
When the straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor works, the force applied to the bending moment detection element 7 is only extrusion force, the force applied to the axial force detection element 12 is axial tension/pressure, and the force applied to the torque detection element 15 is torsion force.
When the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor is used, the bending moment bearing connector 1 at the upper end of the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor can be fixed to a piece to be detected, and the torque bearing plate 18 is fixed to the piece to be detected, so that deformation can be generated on the bending moment detection element 7 under the action of external bending moment, and meanwhile, magnetostrictive materials are pasted on the bending moment detection element 7, and the detection of the bending moment can be realized.
When under the action of external axial force, the axial force detection element 12 can be deformed, and meanwhile, magnetostrictive materials are pasted on the axial force detection element 12, so that the detection of the axial force can be realized.
Under the effect of external torque, deformation can be generated on the torque detection element 15, and meanwhile, magnetostrictive materials are pasted on the torque detection element 15, so that the torque detection can be realized.
In the embodiment, the bending moment force-bearing joint 1 is an axial force and bending moment stress input end of the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor; the torque bearing plate 18 is a torque input end of the straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor.
When the straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor is subjected to coupling force, a bending moment component is input through the bending moment bearing joint 1, the bending moment bearing joint 1 and the first bending moment fixing element 3 are in small clearance fit, the bending moment bearing joint 1 drives the first bending moment fixing element 3 to perform axial and radial combined motion together, the first bending moment fixing element 3 is driven by the bending moment bearing joint 1 to downwards extrude the bending moment detection element 7, and therefore the bending moment sensitive area of the bending moment detection element 7 deforms.
The bending moment force-bearing joint 1 is connected with the upper bending moment movable ball 5 through threads, the upper bending moment movable ball 5 is fixed between the upper first ball element fixing body 4 and the upper second ball element fixing body 6, and meanwhile, the diameter of a screw rod of the bending moment force-bearing joint 1 is smaller than that of a central hole of the upper first ball element fixing body 4, so that the bending moment force-bearing joint 1 and the upper bending moment movable ball 5 can swing at 360 degrees, and movement allowance is provided for the input bending moment; in summary, when a bending moment is input from the bending moment bearing joint 1, the bending moment detecting element 7 is pressed and deformed.
In addition, the whole straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor is micro-deformed, and meanwhile, the bending moment detection element 7 is in clearance fit with the first bending moment fixing element 3, so that the bending moment detection element 7 is deformed under pressure. The surface of the bending moment detection element 7 is covered with a magnetostrictive material, and the bending moment component force in the coupling force can generate stress strain on the magnetostrictive material. The magnetic field change is detected by the detection coil, which generates the inverse magnetostrictive effect (vilari effect) under the action of the applied excitation magnetic field.
The force sensitive area according to this embodiment can be combined with fig. 2, fig. 3, fig. 6 and fig. 7, and it can be seen that the bending moment applied to the force sensitive area does not produce stress change to the torsion force and the axial force, that is, the torque detecting element 15 and the axial force detecting element 12 do not deform themselves.
The transmission route of the bending moment is a bending moment bearing joint 1, a first bending moment fixing element 3, an upper bending moment movable ball 5, an upper first ball element fixing body 4, an upper second ball element fixing body 6, a bending moment detection element 7, a second bending moment fixing element 9, a middle bending moment fixing plate 10, a middle fixing plate 13, a lower fixing plate 14, a lower supporting sleeve 17 and a torque bearing plate 18, the bending moment reaches the torque bearing plate 18 and is output, because the upper first ball element fixing element and the upper second ball element fixing body are in small clearance fit with the second bending moment fixing element 9 and the middle bending moment fixing plate 10, when the straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor inputs bending moment, the relative movement is only the bending moment bearing joint 1 and the upper bending moment movable ball 5, and the axial force detection element 12 is not affected; meanwhile, when the bending moment is transmitted to the lower part of the sensor, the upper side projection of the lower torsion supporting element 16 and the lower fixing plate 14 do not move relatively due to the screw action, and the special design does not cause the bending moment to influence the torque detecting element 15.
When the straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor is subjected to coupling force, an axial force component is input through the bending moment bearing joint 1, due to the fact that the bending moment bearing joint 1 and the upper bending moment movable ball 5 are in threaded fit, when axial force is input from the bending moment bearing joint 1, the bending moment movable ball 5 is driven to displace together, meanwhile, the bending moment movable ball 5 is wrapped between the upper first ball element fixing body 4 and the upper second ball element fixing body 6, the upper first ball element fixing body and the upper second ball element fixing body are driven to displace, the axial force detecting element 12 is fixed on the lower surface of the upper second ball element fixing body 6 through screws, and when the bending moment bearing joint 1 inputs axial force, the axial force is transmitted in two stages and finally acts on the axial force detecting element 12 to deform, when the surface of the axial force detecting element 12 is covered with a magnetostrictive material, the axial component of the coupling force generates a stress strain on the magnetostrictive material. The magnetic field change is detected by the detection coil, which generates the inverse magnetostrictive effect (vilari effect) under the action of the applied excitation magnetic field.
The force sensitive area according to this embodiment can be combined with fig. 2, fig. 3, fig. 8 and fig. 9, and it can be seen that the axial force does not generate stress change to the force sensitive area of the torsion force and the bending moment, that is, the torque detecting element 15 and the bending moment detecting element 7 do not deform themselves. The transmission route of the axial force is the bending moment bearing joint 1, the upper bending moment movable ball 5, the upper first ball element fixing body 4, the upper second ball element fixing body 6, the axial force detection element 12, the middle fixing plate 13, the lower supporting sleeve 17, the lower fixing plate 14 and the torque bearing plate 18, and reaches the torque bearing plate 18 for output. Because the axial force is axial tension/pressure, and the bending moment force-bearing joint 1 and the first bending moment fixing element 3 are in small clearance fit, when the sensor is subjected to the axial force, the bending moment detection element 7 is not influenced; also, as described above, when the axial force is transmitted downward, since no relative movement occurs between the flange of the lower torsion support member 16 and the lower stationary plate 14, this results in no effect on the torque sensing member 15 when the sensor is subjected to the axial force.
When the straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor is subjected to coupling force, a torque component is input through the torque bearing plate 18, and because the torque bearing plate 18 and the lower torsion supporting element 16 are connected through screws, when torque is input from the torque bearing plate 18, the lower torsion supporting element 16 is twisted together, meanwhile, the torque detecting element 15 is fixed in mounting holes of the lower fixing plate 14 and the torque bearing plate 18 through screws, and the lower fixing plate 14 is connected with the lower supporting sleeve 17 through screws, so that the torque bearing plate 18 can be freely twisted, the lower fixing plate 14 is a fixing element and cannot be twisted, and the lower end of the torque detecting element 15 can be twisted together with the lower end when the torque bearing plate 18 inputs torque, and the upper end is fixed, so that the torque detection element is deformed, the surface of the torque detection element 15 is covered with a magnetostrictive material, and the torque component force in the coupling force can generate stress strain on the magnetostrictive material. The magnetic field change is detected by the detection coil, which generates the inverse magnetostrictive effect (vilari effect) under the action of the applied excitation magnetic field.
The force sensitive area according to this embodiment can be combined with fig. 2, fig. 3, fig. 10 and fig. 7, and it can be seen that the applied torque does not produce stress change to the force sensitive area of the bending moment and the axial force, that is, the bending moment detecting element 7 and the axial force detecting element 12 do not deform themselves.
The transmission route of the torque is a torque bearing plate 18, a lower torsion supporting element 16, a torque detecting element 15, a lower fixing plate 14, a middle fixing plate 13, a middle supporting sleeve 11, a middle bending moment fixing plate 10, an upper supporting sleeve 8, an upper fixing plate 2, a bending moment detecting element 7, an upper threaded rod, a first bending moment fixing element 3 and a bending moment bearing joint 1, and the torque reaches the bending moment bearing joint 1 to be output.
It can be seen that the torque transmission path passes through the bending moment detecting element 7, but due to the cooperation of the chamfer between the upper fixing plate 2 and the upper copper bead with holes 19, and the combined action of the central rectangular hole of the first bending moment fixing element 3, the bending moment bearing joint rectangular shaft, and the upper threaded rod of the bending moment detecting element 7, the torque does not reach the bending moment sensitive area of the bending moment detecting element 7, but is directly transmitted through the upper threaded rod, so when the torque bearing plate 18 inputs the torque, the torque does not affect the bending moment detecting element 7; since the axial force detecting element 12 is fixed inside the middle support sleeve 11 by screws, and the torque is transmitted through the middle support sleeve 11, when the torque bearing plate 18 inputs the torque, the axial force detecting element 12 is not affected.
The straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor can simultaneously detect the bending force component, the torsion force component and the pulling pressure component in the coupling force, namely, the structural decoupling is carried out on the coupling force; and does not need to be connected into a power supply line or collect data through a wired interface; the method is applied to the fields of machine tools, biology and medicine, can greatly reduce the problem that a plurality of wired transmissions are needed when the sensor outputs data, and greatly promotes the simplicity of information transmission.
The sequence of the above embodiments is only for convenience of description and does not represent the advantages and disadvantages of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a decoupling zero three-dimensional wireless passive sensor between straight section of thick bamboo T type dimension which characterized in that includes: the bending moment force-bearing connector comprises a bending moment force-bearing connector, an upper fixing plate, a first bending moment fixing element, an upper first ball element fixing body, an upper bending moment movable ball, an upper second ball element fixing body, a bending moment detection element, an upper supporting sleeve, a second bending moment fixing element, a middle bending moment fixing plate, a middle supporting sleeve, an axial force detection element, a middle fixing plate, a lower fixing plate, a torque detection element, a lower torsion supporting element, a lower supporting sleeve, a torque force-bearing plate, a middle copper bead with holes and an upper copper bead with holes;
the bending moment bearing joint is slidably arranged in a central hole of the first bending moment fixing element, and the first bending moment fixing element limits the rotation of the bending moment bearing joint;
the upper first ball element fixing body is provided with a central through hole along an axis, the lower surface of the upper first ball element fixing body is provided with an upper ball socket, the upper ball socket is communicated with the central through hole, the upper second ball element fixing body is fixed on the upper first ball element fixing body, the upper surface of the upper second ball element fixing body is provided with a lower ball socket, the lower ball socket of the upper second ball element fixing body and the upper ball socket of the upper first ball element fixing body jointly form an accommodating space for accommodating the upper bending moment movable ball, the upper bending moment movable ball is arranged in the accommodating space, and the lower end of the bending moment bearing joint penetrates through the central through hole and is fixed on the upper bending moment movable ball;
the lower end of the upper second ball element fixing body is fixed with the upper end of an axial force detection element, and the lower end of the axial force detection element is fixed on the middle fixing plate; the axial force detection element is adhered with a magnetostrictive material;
the lower end of the middle supporting sleeve is fixed on the middle fixing plate, and the upper end of the middle supporting sleeve is fixed with a middle bending moment fixing plate;
the lower end of the upper supporting sleeve is fixed on the upper surface of the middle bending moment fixing plate, and the upper end of the upper supporting sleeve is fixed with an upper fixing plate;
the upper fixing plate is provided with a central hole along the axis of the upper fixing plate, and the axis of the central hole of the upper fixing plate is superposed with the axis of the bending moment bearing joint; the diameter of the central hole of the upper fixing plate is larger than that of the upper end of the bending moment bearing joint;
the bending moment detection elements are at least three and comprise an upper thread section, an upper fixing part, a detection part, a lower fixing part and a lower thread section which are sequentially connected, wherein the upper fixing part and the lower fixing part are cylindrical, and the detection part is flat; and a magnetostrictive material is adhered to the detection part;
the first bending moment fixing element is provided with a first through hole, the diameter of the first through hole is larger than the diameter of an upper threaded section of the bending moment detection element and smaller than the diameter of an upper fixing part, the upper threaded section is provided with a nut, and the first bending moment fixing element is arranged between the upper fixing part of the bending moment detection element and the nut;
the upper fixing plate is provided with a through hole, the through hole of the upper fixing plate is formed into a chamfer, an upper thread section of the bending moment detection element penetrates through the through hole of the upper fixing plate, an upper copper bead with holes is arranged on the part of the upper thread section above the upper fixing plate, and the upper copper bead with holes is arranged in the chamfer of the through hole of the upper fixing plate;
the center of the middle bending moment fixing plate is provided with a center hole, and the upper second ball element fixing body is slidably arranged in the center hole of the middle bending moment fixing plate;
the second bending moment fixing element is arranged on the middle bending moment fixing plate, a central hole is formed in the middle of the second bending moment fixing element, and the upper second ball element fixing body is slidably arranged in the central hole of the second bending moment fixing element;
a through hole is formed in the second bending moment fixing element, and the diameter of the through hole of the second bending moment fixing element is larger than that of the lower threaded section of the bending moment detection element and smaller than that of the lower fixing part;
a through hole is formed in the middle bending moment fixing plate, the diameter of the through hole of the middle bending moment fixing plate is larger than that of the lower thread section of the bending moment detection element, the lower end of the through hole of the middle bending moment fixing plate is in a chamfer shape, the lower thread section of the bending moment detection element penetrates through the through hole of the second bending moment fixing element and the through hole of the middle bending moment fixing plate, and a middle copper bead with holes is arranged on the part, located at the lower part of the middle bending moment fixing plate, of the lower thread section of the bending moment detection element and is positioned in a chamfer of the through hole of the middle bending moment fixing plate;
the lower fixing plate is fixed on the middle fixing plate, and a central hole is formed in the lower fixing plate along the axis of the lower fixing plate; the lower torsion support member includes a cylindrical portion and a flange formed at an upper end of the cylindrical portion, the cylindrical portion of the lower torsion support member is inserted into the central hole of the lower fixing plate, and the flange of the lower torsion support member is disposed between the middle fixing plate and the lower fixing plate;
two upper mounting holes are formed in the lower fixing plate along the axial direction of the lower fixing plate, an upper threaded hole is formed in the lower fixing plate along the radial direction of the lower fixing plate, and the upper mounting holes of the lower fixing plate are vertically intersected with the upper threaded hole of the lower fixing plate;
the upper end of the torque detection element is arranged in the upper mounting hole, and an upper screw which is screwed into an upper threaded hole of the lower fixing plate penetrates through the upper end of the torque detection element to limit the radial position of the torque detection element;
the torque bearing plate is fixed at the lower end of the lower torsion supporting element, two lower mounting holes are formed in the torque bearing plate along the axial direction of the torque bearing plate, two lower threaded holes are formed in the torque bearing plate along the radial direction of the torque bearing plate, and the lower mounting holes are vertically intersected with the lower threaded holes;
the lower end of the torque detection element is arranged in the lower mounting hole, and a lower screw screwed into the lower threaded hole penetrates through the lower end of the torque detection element to limit the radial position of the torque detection element; a magnetostrictive material is adhered on the torque detection element;
the upper end of the lower supporting sleeve is fixed on the lower fixing plate.
2. The straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor as claimed in claim 1, wherein the bending moment force-bearing joint comprises a disk part, a first bump arranged on the lower surface of the disk part and a screw formed at the lower end of the first bump, and the central through hole of the first bending moment fixing element is matched with the first bump.
3. The straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor as claimed in claim 2, wherein the cross section of the first bump and the cross section of the central hole of the first bending moment fixing element are both rectangles with rounded corners.
4. The straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor as claimed in claim 2, wherein the axial lines of the disc part, the first bump and the screw are on the same straight line.
5. The straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor as claimed in claim 1, wherein the middle part of the axial force detection element is thinner than the upper end and the lower end of the axial force detection element, and magnetostrictive materials are adhered on the middle part of the axial force detection element.
6. The straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor as claimed in claim 1, wherein the diameter of the central through hole of the upper first ball element fixing body is larger than the diameter of the lower end of the bending moment force-bearing joint.
7. The straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor as claimed in claim 1, wherein the material of the middle support sleeve is acrylic.
8. The straight-cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor as claimed in claim 1, wherein the material of the upper supporting sleeve is acrylic.
9. The straight-tube T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor as claimed in claim 1, wherein the number of the bending moment detection elements is four.
10. The direct cylinder T-shaped inter-dimensional decoupling three-dimensional wireless passive sensor as claimed in claim 1, wherein the upper bending moment movable ball is clearance fit with the upper first ball element fixed body and the upper second ball element fixed body.
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| JP2867883B2 (en) * | 1994-07-05 | 1999-03-10 | 日産自動車株式会社 | Brake cooling structure |
| JP2011133257A (en) * | 2009-12-22 | 2011-07-07 | Panasonic Electric Works Co Ltd | Bending moment sensor and operation handle using the same |
| CN110174194B (en) * | 2019-07-09 | 2020-09-29 | 东北电力大学 | Shower nozzle type inter-dimension decoupling two-dimensional wireless passive sensor |
| CN110319966B (en) * | 2019-07-09 | 2020-10-27 | 东北电力大学 | Universal joint type inter-dimensional decoupling two-dimensional wireless passive sensor |
| CN110207880B (en) * | 2019-07-09 | 2020-10-23 | 东北电力大学 | Multi-connecting-rod type inter-dimension decoupling two-dimensional wireless passive sensor |
| CN110186609B (en) * | 2019-07-09 | 2020-11-06 | 东北电力大学 | Inter-dimensional decoupling two-dimensional wireless passive sensor |
| CN112067187B (en) * | 2020-08-26 | 2021-10-26 | 东北电力大学 | Coupling type three-dimensional decoupling wireless passive sensor |
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