CN210321936U - Instrument device for synchronously detecting bending moment and weight data relation of logistics vehicles - Google Patents
Instrument device for synchronously detecting bending moment and weight data relation of logistics vehicles Download PDFInfo
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- CN210321936U CN210321936U CN201921142586.XU CN201921142586U CN210321936U CN 210321936 U CN210321936 U CN 210321936U CN 201921142586 U CN201921142586 U CN 201921142586U CN 210321936 U CN210321936 U CN 210321936U
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Abstract
The instrument device of synchronous detection commodity circulation vehicle moment of flexure weight data relation, this instrument device includes: four through holes are connected with an upper block, a cylinder with left and right symmetrical side surfaces, a viscose glue plate type E-shaped bending moment capacitance strain assembly, a viscose glue plate type resistance wire strain assembly, a four-way hole connection lower block, capacitance impedance and phase angle regulators, resistance wire impedance regulators, resistance signal channels, capacitance signal channels 1-3, a multi-selection switch, a standard signal converter, a controller, a multi-selection switch controller and a display instrument, when a large-scale vehicle-mounted weighing logistics transport vehicle runs, the vehicle body generates a left-right inclination angle to form a bending moment and simultaneously interfere the normal vehicle-mounted dynamic weighing precision of the logistics transport vehicle, in order to master the variation of the mutual influence of the weighing sensor and the weighing sensor, the data problem that the variation of the weighing sensor and the weighing sensor needs to be detected at the same time and the same place is solved, the weighing sensor is further improved, the sensor with the bending moment compensation function is designed, and the precision of vehicle-mounted weighing is guaranteed.
Description
Technical Field
The utility model relates to an instrument device of synchronous detection commodity circulation vehicle moment of flexure weight data relation, especially to the instrument device of the synchronous vehicle-mounted dynamic detection moment of flexure and weight data relation of large-scale commodity circulation vehicle.
Background
When a large-sized vehicle-mounted weighing logistics transport vehicle runs, a left-right inclination angle is generated on the vehicle body to form a bending moment, the bending moment interferes with the normal weighing precision of the transport vehicle, in order to master the variation of mutual influence of the vehicle body and the vehicle body, the data of the variation of the vehicle body and the vehicle body must be detected at the same time and the same place, so that the weighing sensor is further improved, favorable data are provided, and a sensor with a bending moment compensation function is designed to ensure the precision of vehicle-mounted weighing.
Disclosure of Invention
The utility model provides an instrument device of synchronous detection commodity circulation vehicle moment of flexure weight data relation, when having solved large-scale vehicle-mounted and weighed commodity circulation haulage vehicle operation betterly, because the automobile body produces left right inclination and forms the moment of flexure, the moment of flexure has disturbed this commodity circulation haulage vehicle's normal vehicle-mounted developments precision of weighing, in order to master the two variable quantity of mutual influence, need same time and detect out the problem of the two data that change in the same place, further improve for this weighing sensor, favorable data is provided, the sensor of area moment of flexure compensation function is designed, guarantee the precision that the vehicle-mounted was weighed.
The utility model discloses an aim at realize like this: the instrument device for synchronously detecting the bending moment and weight data relationship of the logistics vehicles is characterized in that: the meter device includes: the four-through-hole connection upper block (1), a cylinder (2) on the left and right symmetrical side surfaces, a viscose glue plate type E-shaped bending moment capacitance strain assembly (3), a viscose glue plate type resistance wire strain assembly (4), a four-way hole connection lower block (5), a capacitance impedance and phase angle regulator (6), a resistance wire impedance regulator (7), a resistance signal channel (8), a capacitance signal channel (1) (9), a capacitance signal channel (2) (10), a capacitance signal channel (3) (11), a multi-selection switch (12), a standard signal converter (13), a controller (14), a multi-selection switch controller (15) and a display instrument (16), wherein the four-way hole connection upper block (1) is connected with the cylinder (2) on the left and right symmetrical side surfaces, the cylinder (2) on the left and right symmetrical side surfaces is connected with the viscose glue plate type resistance wire strain assembly (4), the viscose glue plate type resistance wire strain assembly (4) is connected with a resistance wire impedance regulator (7), the resistance wire impedance regulator (7) is connected with a multi-selection switch (12) through a resistance signal channel (8), the right side surface of a cylinder (2) on the left and right symmetrical sides is connected with a viscose glue plate type E-shaped bending moment capacitance strain assembly (3), the viscose glue plate type E-shaped bending moment capacitance strain assembly (3) is sequentially connected with a capacitance signal channel 1 (9), a capacitance signal channel 2 (10) and a capacitance signal channel 3 (11) through capacitance signal leads, the capacitance signal channel 1 (9), the capacitance signal channel 2 (10) and the capacitance signal channel 3 (11) are respectively connected with a multi-selection switch (12), the multi-selection switch (12) is connected with a standard signal converter (13), the standard signal converter (13) is connected with a controller (14), the controller (14) is respectively connected with a multi-selection switch controller (15) and a display instrument (16), a multiple-choice switch controller (15) controls the multiple-choice switch (12).
The method is characterized in that: viscose plywood formula E type moment of flexure electric capacity strain assembly (3) include: an insulator (3-1) having an area of A2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4The lower shaft rectangular capacitor plate (3-4), the electrolytic medium (3-5) between every two capacitor plates, and the rectangular viscose glue plate (3-6) for the capacitance strain assembly, the area is A2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4The lower shaft rectangular capacitor plate (3-4) is respectively connected with the capacitor strain assembly by a cuboid viscose glue board (3-6) through an insulator (3-1), and the area is A2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4The lower shaft rectangular capacitor plates (3-4) are respectively connected with a capacitive signal lead in sequence, and the capacitive strain assembly is connected with the right side of the cylinder (2) on the left and right symmetrical sides by a rectangular viscose glue board (3-6).
The method is characterized in that: viscose plywood formula resistance wire subassembly of meeting an emergency (4) includes: the resistance wire strain assembly is connected with the left side of a cylinder (2) on the left and right symmetric sides through a cuboid viscose glue board (4-1), a rectangular insulating layer (4-2), a grid type resistance wire (4-3) and surface layer insulating quick-drying paint (4-4), wherein the surface layer insulating quick-drying paint (4-4) is coated on the grid type resistance wire (4-3), the grid type resistance wire (4-3) is connected with a resistance wire signal lead, the grid type resistance wire (4-3) is covered on the rectangular insulating layer (4-2), the rectangular insulating layer (4-2) is covered on the resistance wire strain assembly through the cuboid viscose glue board (4-1), and the resistance wire strain assembly is connected with the left side of the cylinder (2) on the left and right symmetric sides through the cuboid.
Has the advantages that: the imaginary weight G is connected with the four-way hole upper block (1), the four-way hole lower block (5) is connected with the imaginary axle frame, when the inclination angle of the bridge frame is zero, the initial signal of the capacitance strain component (3) for adjusting the adhesive plywood E-shaped bending moment is displayed as zero, the signal of the strain component (4) for the adhesive plywood resistance wire is displayed as G, when the inclination angle of the axle frame is not equal to zero, the axle frame inclines leftwards or rightwards to enable the axle frame to generate bending moment and G to generate downward component force, the bending moment and the weight acting on the cylinder (2) are changed, the change is respectively transmitted to the bending moment and the weight of the viscose plate type E-shaped bending moment capacitance strain assembly (3) and the viscose plate type resistance wire strain assembly (4) on the left side and the right side of the cylinder (2) to be changed, thereby causing the signals of the viscose glue plate type E-shaped bending moment capacitance strain assembly (3) and the viscose glue plate type resistance wire strain assembly (4) to be changed.
When the axle frame inclines rightwards, the area is A2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4Signal variation of the lower axis rectangular capacitor plates (3-4) (fig. 2):
dC=│C-C 0│=C-C 0
C 0=εA/H
wherein:
dCthe capacitance variation of the rectangular viscose glue board (3-6) for the capacitance strain assembly after being subjected to the action of the bending moment M;
Cthe capacitance of the rectangular viscose glue board (3-6) for the capacitance strain assembly after being subjected to the action of the bending moment M;
C 0-the capacitance of the rectangular parallelepiped glued slabs (3-6) for capacitive strain assemblies when not subjected to the bending moment M;
εarea A2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The dielectric constant of an electrolytic medium between the middle shaft rectangular capacitor polar plates (3-3);
Hthe rectangular adhesive rubber plate (3-6) for the capacitance strain assembly has an area A when not subjected to bending moment M2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The distance between the middle shaft rectangular capacitor plates (3-3);
Aarea A2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The coverage area between the middle shaft rectangular capacitor plates (3-3).
The area of the cuboid viscose glue plate (3-6) for the capacitance strain assembly is A under the action of bending moment2The upper shaft rectangular capacitor plate (3-2) and the area of the upper shaft rectangular capacitor plate is A3The displacement d of the middle shaft rectangular capacitor plate (3-3)H，
C=εA/(H-dH)
As can be seen from FIG. 2, A2=A4＜A3And the cuboid viscose glue slab (3-6) for the capacitance strain assembly is deformed under the action of bending moment M, and A2、A4Is projected at A3Within, so that the area is A2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The coverage area between the middle shaft rectangular capacitor plates (3-3) is constant A2Or A4(ii) a And when the cuboid viscose glue slab (3-6) for the capacitance strain assembly is not subjected to the action of the bending moment M, the area is A2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The distance between the middle shaft rectangular capacitor plates (3-3)HIs constant, equation of thereforeC 0=εA/HInC 0AndHthe relationship between them is hyperbolic (see figure 4).
As shown in FIG. 4, for dCAnd dHCarrying out linearization treatment: taking a point g on the curve, making a tangent line of the point g, taking a tangent line segment dg near the point g, and projecting the segment onto an axis H and an axis C respectively, wherein the projection values are dHAnd dC；
Because of dC=C-C 0=εA/(H-dH)-εA/H
As can be seen from the figure, dH/H< 1, so the above formula can be developed in series form:
in practical application, the cuboid adhesive rubber plate (3-6) for the capacitive strain assembly is attached to the elastic deformation body, the deformation of the elastic deformation body is allowed to be small, and therefore the cuboid adhesive rubber plate (3-6) for the capacitive strain assembly has the area A under the action of bending moment2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The displacement dH between the middle axis rectangular capacitor plates (3-3) is very small, so dH/H<<1, omitting high-order terms:
i.e. the capacitance variation dCThe area of the cuboid viscose glue plate 3-6 for the capacitance strain assembly is A under the action of bending moment2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The displacement d between the middle shaft rectangular capacitor plates (3-3)HAnd has a linear relationship.
Calculation of sensitivity: area is A2The upper shaft rectangular capacitor plate (3-2) and the area of the upper shaft rectangular capacitor plate are A3The sensitivity of the middle shaft rectangular capacitor plate (3-3) capacitance sensor is
s 2=dC/dH=εA/H 2
Similarly, the area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The sensitivity of the middle shaft rectangular capacitor plate (3-3) capacitance sensor is
s 4=εA/H 2
Total sensitivity of the sensor:
s=s 2+s 4=2εA/H 2
wherein the content of the first and second substances,εis a constant number of times, and is,A=A 2orA 4Is a constant number of times, and is,His constant, so the total sensitivity of the sensorsIs a constant.
From the above derivation, the change in bending moment M causes dHSignal d varying, in turn, causing a change in capacitanceCLinearly changed, the signal is transmitted to a capacitance impedance and phase angle adjuster (6) through a capacitance signal lead and then respectively transmitted to capacitance signal channels 1 (9) (namely, the measurement area is A)2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plates (3-3) and a capacitor signal channel 2 (10) (namely the measurement area is A)4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The middle shaft rectangular capacitance plate (3-3) and the capacitance signal channel 3 (11) (namely the measurement area is A)2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The sum of signals between the middle shaft rectangular capacitor plates (3-3) enters the multi-selection switch (12), and enters the controller (14) through the standard signal converter (13), the controller (14) controls the multi-channel signal on-off of the multi-selection switch (12) through the multi-selection switch controller (15), and finally, the change data is displayed on the display instrument (16).
Taking the right inclination of the axle frame as an example, the signal change of the grid-type resistance wire (4-3) (shown in the attached figure 3):
resistance of resistance wireR=f（L，F，ρ) Then, then
Relative signal change
The resistance wire is subjected to the relative resistance variation under the action of bending moment and gravity G;
when the resistance wire is subjected to bending moment, the length variation d of the resistance wireL/LAlthough bent, the length of the resistance wire is unchanged, so the term is zero; radius variation d of resistance wirer/rThe radius of the resistance wire is not changed, so the term is zero; resistance wire material resistivity variation dρ/ρThe axial positive stress acting on the resistance wire is zero, and the Poisson ratio is zero, so the term is zero; dL/L=0，dr/r=0，dρ/ρIf not less than 0, then dR/R=0, the resistance wire can not measure the change value of the bending moment;
when the resistance wire is acted by gravity G, the axle frame inclines rightwards, the supposed object G inclines, and generates a gliding component force, so that the gravity G acted on the grid-type resistance wire (4-3) is changed, and at the moment dL/L≠0、dr/r≠0、dρ/ρNot equal to 0, and therefore the total variation is also not equal to zero, a signal variation is generated.
Total variation dR=R(dL/L-2dr/r+dρ/ρ) Wherein d isL/L≠0，dr/r≠0，dρ/ρNot equal to 0, but dρ/ρThe value is very small, the total variation is transmitted to a resistance wire impedance regulator (7) through a resistance wire signal lead, then enters a multi-selection switch (12) through a resistance signal channel (8), enters a controller (14) through a standard signal converter (13), the controller (14) controls the multi-path signal on-off of the multi-selection switch (12) through a multi-selection switch controller (15), and finally, variation data are displayed on a display instrument (16).
Similarly, when the axle frame inclines left, the viscose glue plate type E-shaped bending moment capacitance strain assembly (3) and viscose glueThe signal of the plate-type resistance wire strain component (4) is correspondingly changed as above, wherein d of the viscose glue plate-type E-shaped bending moment capacitance strain component (3)C=│C-C 0│=C 0-COtherwise, the right inclination condition is the same; the signal change of the viscose glue plate type resistance wire strain component (4) is irrelevant to bending.
The method solves the problems that when a large-scale vehicle-mounted weighing logistics transport vehicle runs, a vehicle body generates a left-right inclination angle to form bending moment, the bending moment interferes with the normal vehicle-mounted dynamic weighing precision of the logistics transport vehicle, and in order to master the variation quantity of mutual influence of the vehicle body and the vehicle-mounted dynamic weighing precision, the data of the variation of the logistics transport vehicle and the vehicle-mounted dynamic weighing precision need to be detected at the same time and the same place.
The advantages are that: the problem of when large-scale commodity circulation haulage vehicle that weighs on-vehicle, because the automobile body produces left and right inclination and forms the moment of flexure, the moment of flexure has disturbed this commodity circulation haulage vehicle's normal on-vehicle dynamic weighing precision, in order to master the two variable quantity that influence each other, need the same time and the same place detect out the data of the two changes is solved, for this weighing sensor further improves, provides favorable data, designs the sensor of taking moment of flexure compensation function, guarantees the precision that the vehicle-mounted weighed.
Drawings
FIG. 1 is a structural diagram of the present invention;
FIG. 2 is a structural diagram of a middle adhesive plate type E-shaped bending moment capacitance strain assembly (3) of the utility model;
FIG. 3 is a structural diagram of a middle adhesive plywood type resistance wire strain assembly (4) of the utility model;
FIG. 4 is a relationship between capacitance C of the rectangular glue plate and the distance H between the capacitor plates;
in the figure: 1. the four through holes are connected with the upper block; 2. a cylinder with left and right symmetrical side surfaces; 3. the viscose glue plate type E-shaped bending moment capacitance strain assembly; 4. a viscose glue plate type resistance wire strain component; 5. the four-way hole is connected with the lower block; 6. a capacitive impedance and phase angle adjuster;7. a resistance wire impedance adjuster; 8. a resistive signal path; 9. a capacitive signal channel 1; 10. a capacitive signal channel 2; 11. a capacitive signal path 3; 12. a multi-selection switch; 13. a standard signal converter; 14. a controller; 15. a multiple selection switch controller; 16. a display instrument; 3-1, an insulator; 3-1, area A2The upper shaft rectangular capacitor plate; 3-3, area A3The middle shaft rectangular capacitor plate; 3-4, area A4The lower shaft rectangular capacitor plate; 3-5, electrolytic medium between every two capacitor plates; 3-6, using a cuboid viscose glue board for the capacitance strain assembly; 4-1, using a cuboid viscose glue board for the resistance wire strain component; 4-2, a rectangular insulating layer; 4-3, grid type resistance wires; 4-4, surface layer insulation quick-drying paint.
Detailed Description
Example 1: the instrument device for synchronously detecting the bending moment and weight data relationship of the logistics vehicles is characterized in that:
the meter device includes: the four-through-hole connection upper block (1), a cylinder (2) on the left and right symmetrical side surfaces, a viscose glue plate type E-shaped bending moment capacitance strain assembly (3), a viscose glue plate type resistance wire strain assembly (4), a four-way hole connection lower block (5), a capacitance impedance and phase angle regulator (6), a resistance wire impedance regulator (7), a resistance signal channel (8), a capacitance signal channel (1) (9), a capacitance signal channel (2) (10), a capacitance signal channel (3) (11), a multi-selection switch (12), a standard signal converter (13), a controller (14), a multi-selection switch controller (15) and a display instrument (16), wherein the four-way hole connection upper block (1) is connected with the cylinder (2) on the left and right symmetrical side surfaces, the cylinder (2) on the left and right symmetrical side surfaces is connected with the viscose glue plate type resistance wire strain assembly (4), the viscose glue plate type resistance wire strain assembly (4) is connected with a resistance wire impedance regulator (7), the resistance wire impedance regulator (7) is connected with a multi-selection switch (12) through a resistance signal channel (8), the right side surface of a cylinder (2) on the left and right symmetrical sides is connected with a viscose glue plate type E-shaped bending moment capacitance strain assembly (3), the viscose glue plate type E-shaped bending moment capacitance strain assembly (3) is sequentially connected with a capacitance signal channel 1 (9), a capacitance signal channel 2 (10) and a capacitance signal channel 3 (11) through capacitance signal leads, the capacitance signal channel 1 (9), the capacitance signal channel 2 (10) and the capacitance signal channel 3 (11) are respectively connected with a multi-selection switch (12), the multi-selection switch (12) is connected with a standard signal converter (13), the standard signal converter (13) is connected with a controller (14), the controller (14) is respectively connected with a multi-selection switch controller (15) and a display instrument (16), a multiple-choice switch controller (15) controls the multiple-choice switch (12).
The method is characterized in that: viscose plywood formula E type moment of flexure electric capacity strain assembly (3) include: an insulator (3-1) having an area of A2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4The lower shaft rectangular capacitor plate (3-4), the electrolytic medium (3-5) between every two capacitor plates, and the rectangular viscose glue plate (3-6) for the capacitance strain assembly, the area is A2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4The lower shaft rectangular capacitor plate (3-4) is respectively connected with the capacitor strain assembly by a cuboid viscose glue board (3-6) through an insulator (3-1), and the area is A2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4The lower shaft rectangular capacitor plates (3-4) are respectively connected with a capacitive signal lead in sequence, and the capacitive strain assembly is connected with the right side of the cylinder (2) on the left and right symmetrical sides by a rectangular viscose glue board (3-6).
The method is characterized in that: viscose plywood formula resistance wire subassembly of meeting an emergency (4) includes: the resistance wire strain assembly is connected with the left side of a cylinder (2) on the left and right symmetric sides through a cuboid viscose glue board (4-1), a rectangular insulating layer (4-2), a grid type resistance wire (4-3) and surface layer insulating quick-drying paint (4-4), wherein the surface layer insulating quick-drying paint (4-4) is coated on the grid type resistance wire (4-3), the grid type resistance wire (4-3) is connected with a resistance wire signal lead, the grid type resistance wire (4-3) is covered on the rectangular insulating layer (4-2), the rectangular insulating layer (4-2) is covered on the resistance wire strain assembly through the cuboid viscose glue board (4-1), and the resistance wire strain assembly is connected with the left side of the cylinder (2) on the left and right symmetric sides through the cuboid.
The determination principle is as follows: the imaginary weight G is connected with the four-way hole upper block (1), the four-way hole lower block (5) is connected with the imaginary axle frame, when the inclination angle of the bridge frame is zero, the initial signal of the capacitance strain component (3) for adjusting the adhesive plywood E-shaped bending moment is displayed as zero, the signal of the strain component (4) for the adhesive plywood resistance wire is displayed as G, when the inclination angle of the axle frame is not equal to zero, the axle frame inclines leftwards or rightwards to enable the axle frame to generate bending moment and G to generate downward component force, the bending moment and the weight acting on the cylinder (2) are changed, the change is respectively transmitted to the bending moment and the weight of the viscose plate type E-shaped bending moment capacitance strain assembly (3) and the viscose plate type resistance wire strain assembly (4) on the left side and the right side of the cylinder (2) to be changed, thereby causing the signals of the viscose glue plate type E-shaped bending moment capacitance strain assembly (3) and the viscose glue plate type resistance wire strain assembly (4) to be changed.
When the axle frame inclines rightwards, the area is A2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4Signal variation of the lower axis rectangular capacitor plates (3-4) (fig. 2):
dC=│C-C 0│=C-C 0
C 0=εA/H
wherein:
dCthe capacitance variation of the rectangular viscose glue board (3-6) for the capacitance strain assembly after being subjected to the action of the bending moment M;
Cthe capacitance of the rectangular viscose glue board (3-6) for the capacitance strain assembly after being subjected to the action of the bending moment M;
C 0-the capacitance of the rectangular parallelepiped glued slabs (3-6) for capacitive strain assemblies when not subjected to the bending moment M;
εarea A2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The dielectric constant of an electrolytic medium between the middle shaft rectangular capacitor polar plates (3-3);
Hthe rectangular adhesive rubber plate (3-6) for the capacitance strain assembly has an area A when not subjected to bending moment M2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The distance between the middle shaft rectangular capacitor plates (3-3);
Aarea A2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The coverage area between the middle shaft rectangular capacitor plates (3-3).
The area of the cuboid viscose glue plate (3-6) for the capacitance strain assembly is A under the action of bending moment2The upper shaft rectangular capacitor plate (3-2) and the area of the upper shaft rectangular capacitor plate is A3The displacement d of the middle shaft rectangular capacitor plate (3-3)H，
C=εA/(H-dH)
As can be seen from FIG. 2, A2=A4＜A3And the cuboid viscose glue slab (3-6) for the capacitance strain assembly is deformed under the action of bending moment M, and A2、A4Is projected at A3Within, so that the area is A2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The coverage area between the middle shaft rectangular capacitor plates (3-3) is constant A2Or A4(ii) a And when the cuboid viscose glue slab (3-6) for the capacitance strain assembly is not subjected to the action of the bending moment M, the area is A2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The distance between the middle shaft rectangular capacitor plates (3-3)HIs constant, equation of thereforeC 0=εA/HInC 0AndHthe relationship between them is hyperbolic (see figure 4).
As shown in FIG. 4, for dCAnd dHCarrying out linearization treatment: taking a point g on the curve, making a tangent line of the point g, taking a tangent line segment dg near the point g, and projecting the segment onto an axis H and an axis C respectively, wherein the projection values are dHAnd dC；
Because of dC=C-C 0=εA/(H-dH)-εA/H
As can be seen from the figure, dH/H< 1, so the above formula can be developed in series form:
in practical application, the cuboid adhesive rubber plate (3-6) for the capacitive strain assembly is attached to the elastic deformation body, the deformation of the elastic deformation body is allowed to be small, and therefore the cuboid adhesive rubber plate (3-6) for the capacitive strain assembly has the area A under the action of bending moment2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The displacement dH between the middle axis rectangular capacitor plates (3-3) is very small, so dH/H<<1, omitting high-order terms:
i.e. the capacitance variation dCThe area of the cuboid viscose glue plate 3-6 for the capacitance strain assembly is A under the action of bending moment2The upper shaft rectangular capacitor plate (3-2) or area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The displacement d between the middle shaft rectangular capacitor plates (3-3)HAnd has a linear relationship.
Calculation of sensitivity: area is A2The upper shaft rectangular capacitor plate (3-2) and the area of the upper shaft rectangular capacitor plate are A3The sensitivity of the middle shaft rectangular capacitor plate (3-3) capacitance sensor is
s 2=dC/dH=εA/H 2
Similarly, the area is A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The sensitivity of the middle shaft rectangular capacitor plate (3-3) capacitance sensor is
s 4=εA/H 2
Total sensitivity of the sensor:
s=s 2+s 4=2εA/H 2
wherein the content of the first and second substances,εis a constant number of times, and is,A=A 2orA 4Is a constant number of times, and is,His constant, so the total sensitivity of the sensorsIs a constant.
From the above derivation, the change in bending moment M causes dHSignal d varying, in turn, causing a change in capacitanceCLinearly changed, the signal is transmitted to a capacitance impedance and phase angle adjuster (6) through a capacitance signal lead and then respectively transmitted to capacitance signal channels 1 (9) (namely, the measurement area is A)2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plates (3-3) and a capacitor signal channel 2 (10) (namely the measurement area is A)4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The middle shaft rectangular capacitance plate (3-3) and the capacitance signal channel 3 (11) (namely the measurement area is A)2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4The lower shaft rectangular capacitor plate (3-4) and the area of the capacitor plate is A3The sum of signals between the middle shaft rectangular capacitor plates (3-3) enters the multi-selection switch (12), and enters the controller (14) through the standard signal converter (13), the controller (14) controls the multi-channel signal on-off of the multi-selection switch (12) through the multi-selection switch controller (15), and finally, the change data is displayed on the display instrument (16).
Taking the right inclination of the axle frame as an example, the signal change of the grid-type resistance wire (4-3) (shown in the attached figure 3):
electricity of resistance wireResistance deviceR=f（L，F，ρ) Then, then
Relative signal change
The resistance wire is subjected to the relative resistance variation under the action of bending moment and gravity G;
when the resistance wire is subjected to bending moment, the length variation d of the resistance wireL/LAlthough bent, the length of the resistance wire is unchanged, so the term is zero; radius variation d of resistance wirer/rThe radius of the resistance wire is not changed, so the term is zero; resistance wire material resistivity variation dρ/ρThe axial positive stress acting on the resistance wire is zero, and the Poisson ratio is zero, so the term is zero; dL/L=0，dr/r=0，dρ/ρIf not less than 0, then dR/R=0, the resistance wire can not measure the change value of the bending moment;
when the resistance wire is acted by gravity G, the axle frame inclines rightwards, the supposed object G inclines, and generates a gliding component force, so that the gravity G acted on the grid-type resistance wire (4-3) is changed, and at the moment dL/L≠0、dr/r≠0、dρ/ρNot equal to 0, and therefore the total variation is also not equal to zero, a signal variation is generated.
Total variation dR=R(dL/L-2dr/r+dρ/ρ) Wherein d isL/L≠0，dr/r≠0，dρ/ρNot equal to 0, but dρ/ρThe value is very small, and the total variable quantity is transmitted to a resistance wire impedance regulator (7) through a resistance wire signal lead and then enters a multi-selection switch through a resistance signal channel (8)(12) The multi-channel signal enters a controller (14) through a standard signal converter (13), the controller (14) controls the multi-channel signal on-off of a multi-selection switch (12) through a multi-selection switch controller (15), and finally, the change data is displayed on a display instrument (16).
In the same way, when the axle frame inclines left, signals of the viscose glue plate type E-shaped bending moment capacitance strain assembly (3) and the viscose glue plate type resistance wire strain assembly (4) are correspondingly changed, wherein d of the viscose glue plate type E-shaped bending moment capacitance strain assembly (3)C=│C-C 0│=C 0-COtherwise, the right inclination condition is the same; the signal change of the viscose glue plate type resistance wire strain component (4) is irrelevant to bending.
The method solves the problems that when a large-scale vehicle-mounted weighing logistics transport vehicle runs, a vehicle body generates a left-right inclination angle to form bending moment, the bending moment interferes with the normal vehicle-mounted dynamic weighing precision of the logistics transport vehicle, and in order to master the variation quantity of mutual influence of the vehicle body and the vehicle-mounted dynamic weighing precision, the data of the variation of the logistics transport vehicle and the vehicle-mounted dynamic weighing precision need to be detected at the same time and the same place.
Claims (3)
1. The instrument device for synchronously detecting the bending moment and weight data relationship of the logistics vehicles is characterized in that: the meter device includes: the four-through-hole connection upper block (1), a cylinder (2) on the left and right symmetrical side surfaces, a viscose glue plate type E-shaped bending moment capacitance strain assembly (3), a viscose glue plate type resistance wire strain assembly (4), a four-way hole connection lower block (5), a capacitance impedance and phase angle regulator (6), a resistance wire impedance regulator (7), a resistance signal channel (8), a capacitance signal channel (1) (9), a capacitance signal channel (2) (10), a capacitance signal channel (3) (11), a multi-selection switch (12), a standard signal converter (13), a controller (14), a multi-selection switch controller (15) and a display instrument (16), wherein the four-way hole connection upper block (1) is connected with the cylinder (2) on the left and right symmetrical side surfaces, the cylinder (2) on the left and right symmetrical side surfaces is connected with the viscose glue plate type resistance wire strain assembly (4), the viscose glue plate type resistance wire strain assembly (4) is connected with a resistance wire impedance regulator (7), the resistance wire impedance regulator (7) is connected with a multi-selection switch (12) through a resistance signal channel (8), the right side surface of a cylinder (2) on the left and right symmetrical sides is connected with a viscose glue plate type E-shaped bending moment capacitance strain assembly (3), the viscose glue plate type E-shaped bending moment capacitance strain assembly (3) is sequentially connected with a capacitance signal channel 1 (9), a capacitance signal channel 2 (10) and a capacitance signal channel 3 (11) through capacitance signal leads, the capacitance signal channel 1 (9), the capacitance signal channel 2 (10) and the capacitance signal channel 3 (11) are respectively connected with a multi-selection switch (12), the multi-selection switch (12) is connected with a standard signal converter (13), the standard signal converter (13) is connected with a controller (14), the controller (14) is respectively connected with a multi-selection switch controller (15) and a display instrument (16), a multiple-choice switch controller (15) controls the multiple-choice switch (12).
2. The instrument device for synchronously detecting bending moment weight data relationship of logistics vehicles as claimed in claim 1, wherein: viscose plywood formula E type moment of flexure electric capacity strain assembly (3) include: an insulator (3-1) having an area of A2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4The lower shaft rectangular capacitor plate (3-4), the electrolytic medium (3-5) between every two capacitor plates, and the rectangular viscose glue plate (3-6) for the capacitance strain assembly, the area is A2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4The lower shaft rectangular capacitor plate (3-4) is respectively connected with the capacitor strain assembly by a cuboid viscose glue board (3-6) through an insulator (3-1), and the area is A2The upper shaft rectangular capacitor plate (3-2) has an area of A3The middle shaft rectangular capacitor plate (3-3) has an area of A4The lower-axis rectangular capacitor plates (3-4) are respectively connected with a capacitor signal lead in sequence, and the capacitor strain assembly is a cuboid viscose glue plate (3-6) is connected with the right side of the cylinder (2) with the left and right symmetrical side surfaces.
3. The instrument device for synchronously detecting bending moment weight data relationship of logistics vehicles as claimed in claim 1, wherein: viscose plywood formula resistance wire subassembly of meeting an emergency (4) includes: the resistance wire strain assembly is connected with the left side of a cylinder (2) on the left and right symmetric sides through a cuboid viscose glue board (4-1), a rectangular insulating layer (4-2), a grid type resistance wire (4-3) and surface layer insulating quick-drying paint (4-4), wherein the surface layer insulating quick-drying paint (4-4) is coated on the grid type resistance wire (4-3), the grid type resistance wire (4-3) is connected with a resistance wire signal lead, the grid type resistance wire (4-3) is covered on the rectangular insulating layer (4-2), the rectangular insulating layer (4-2) is covered on the resistance wire strain assembly through the cuboid viscose glue board (4-1), and the resistance wire strain assembly is connected with the left side of the cylinder (2) on the left and right symmetric sides through the cuboid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921142586.XU CN210321936U (en) | 2019-07-20 | 2019-07-20 | Instrument device for synchronously detecting bending moment and weight data relation of logistics vehicles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921142586.XU CN210321936U (en) | 2019-07-20 | 2019-07-20 | Instrument device for synchronously detecting bending moment and weight data relation of logistics vehicles |
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| CN201921142586.XU Expired - Fee Related CN210321936U (en) | 2019-07-20 | 2019-07-20 | Instrument device for synchronously detecting bending moment and weight data relation of logistics vehicles |
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