CN211042549U

CN211042549U - Substrate for three-dimensional solid force sensor based on optical fiber sensor

Info

Publication number: CN211042549U
Application number: CN202020116093.5U
Authority: CN
Inventors: 冉曾令; 肖亚琴; 徐田甜; 李现坤; 卫亚斌
Original assignee: University of Electronic Science and Technology of China
Current assignee: University of Electronic Science and Technology of China
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-07-17
Anticipated expiration: 2030-01-16

Abstract

The utility model discloses a three-dimensional solid base member for physical stamina sensor based on optical fiber sensor belongs to the sensor field. This three-dimensional solid physical strength sensor is with base member formula as an organic whole based on optical fiber sensor, and be "paper clip" type, the base member is including the first conducting block that is located the top and the second conducting block that is located the bottom, have the clearance between first conducting block and the second conducting block, through the X that connects gradually between first conducting block and the second conducting block to response roof beam, Y is to response roof beam and the Z is to response roof beam connection, first through-hole has respectively been seted up on the response roof beam, the axial of first through-hole is perpendicular to corresponding X respectively to, Y is to and Z is to.

Description

Substrate for three-dimensional solid force sensor based on optical fiber sensor

Technical Field

The utility model relates to a sensor technical field, concretely relates to three-dimensional solid base member for physical sensor based on optical fiber sensor.

Background

At present, the solid force sensor mostly adopts the traditional electrical sensor, so that the anti-electromagnetic interference capability of the solid force sensor is poor.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned not enough among the prior art, the utility model aims at providing a three-dimensional solid physical strength sensor uses base member based on optical fiber sensor, and the interference killing feature of the three-dimensional solid physical strength sensor based on this three-dimensional solid physical strength sensor uses base member is superior to the interference killing feature of the solid physical strength sensor that the tradition adopted electrical sensor.

In order to achieve the purpose of the invention, the utility model adopts the technical scheme that:

the utility model provides a three-dimensional solid physical force sensor base member based on optical fiber sensor, the base member formula as an organic whole, and be "paper clip" type, the base member is including the first conducting block that is located the top and the second conducting block that is located the bottom, have the clearance between first conducting block and the second conducting block, through the X that connects gradually between first conducting block and the second conducting block to response roof beam, Y is to response roof beam and the response roof beam connection of Z, first through-hole has respectively been seted up on the response roof beam, the axial of first through-hole is perpendicular to corresponding X respectively to, Y is to and Z is to.

Further, the cross section of the first through hole is 8-shaped.

Further, the first and second conductive blocks have the same size.

Further, the first conductive block and the second conductive block have a cubic or rectangular parallelepiped shape.

Furthermore, the second conduction block is provided with a threaded hole.

Further, any outer surface of the three sensing beams is located on an outer surface of a cuboid or cube.

The utility model has the advantages that:

during application, the base body is fixed at the position to be collected by the second transmission block, wherein one surface, far away from the second transmission block, of the first transmission block is a stress surface of the force to be collected. The first conducting block transmits the received force to each sensing beam to enable the sensing beams to deform, the optical fiber sensors on the sensing beams are subjected to corresponding strain to cause the wavelength to drift, and then the wavelength is reflected on the output value of the optical fiber sensors, and the processing unit demodulates the output value to obtain the three-dimensional force applied to the stress surface. The utility model discloses not only realized the collection of three-dimensional solid physical power, still effectively improved this three-dimensional solid physical force sensor's based on optical fiber sensor precision. The arrangement of the first through hole on the induction beam is combined, the unit deformation amount of the induction beam is increased, and therefore the precision of the optical fiber sensor is greatly improved.

The utility model discloses based on optical fiber sensor gathers three-dimensional solid physical power, utilize the strong characteristics of optical fiber sensor anti-electromagnetic interference ability to have strengthened this three-dimensional solid physical power sensor anti-electromagnetic interference's ability based on optical fiber sensor.

Drawings

FIG. 1 is a top view of a substrate for a three-dimensional solid force sensor in an exemplary embodiment;

FIG. 2 is a schematic diagram of a first view angle of FIG. 1;

FIG. 3 is a schematic view of the structure of FIG. 2 shown under hidden lines;

FIG. 4 is a schematic diagram of a second view angle of FIG. 1;

FIG. 5 is a schematic view of the structure of FIG. 4 shown under the hidden line;

FIG. 6 is a right side view of FIG. 1;

FIG. 7 is a left side view of FIG. 1;

FIG. 8 is a bottom view of FIG. 1;

FIG. 9 is a top view of FIG. 1;

FIG. 10 is a front view of FIG. 1 after installation of the fiber optic sensor;

FIG. 11 is a left side view of FIG. 10;

fig. 12 is a bottom view of fig. 10.

Wherein, 1, a first conducting block; 2. an X-direction sensing beam; 3. a Y-direction sensing beam; 4. a first through hole; 5. a Z-direction sensing beam; 6. a second conductive block; 7. a threaded bore.

Detailed Description

The following detailed description of the present invention will be made with reference to the accompanying drawings so as to facilitate the understanding of the present invention by those skilled in the art. It should be understood that the embodiments described below are only some embodiments of the invention, and not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step, without departing from the spirit and scope of the present invention as defined and defined by the appended claims, fall within the scope of protection of the invention.

As shown in fig. 1 to 5, the substrate for the three-dimensional solid force sensor based on the optical fiber sensor comprises an integrated substrate in a shape of a "paper clip", the substrate comprises a first conductive block 1 located at the top and a second conductive block 6 located at the bottom, a gap is formed between the first conductive block 1 and the second conductive block 6, the first conductive block 1 and the second conductive block 6 are connected through an X-direction sensing beam 2, a Y-direction sensing beam 3 and a Z-direction sensing beam 5 which are sequentially connected, first through holes 4 are respectively formed in the sensing beams, and the axial directions of the first through holes 4 are respectively perpendicular to the corresponding X-direction, Y-direction and Z-direction. Wherein the directions of the coordinate system are as shown in figure 2.

The integrated substrate of the clip type enables the structure to drive the induction beams in three directions through a central block, and the force test in three directions is realized through the clip type structure.

When the method is implemented, the preferable substrate material in the scheme is nickel-cobalt alloy, Hastelloy or stainless steel and aluminum alloy with better strain characteristics. The cross section of the first through hole 4 is 8-shaped, so that the rigidity of the induction beam is increased, and the structural strain can be increased by sticking the optical fiber sensor at the thinnest position of the induction beam, so that the optical fiber sensor generates larger strain.

As shown in fig. 2 and 4, the first conductive block 1 and the second conductive block 6 have the same size, and the first conductive block 1 and the second conductive block 6 are in a cube or a cuboid shape so as to facilitate the fixation of the three-dimensional solid force sensor base body and the measurement position and the application of force on the three-dimensional solid force sensor base body and effectively drive each sensing beam, wherein the top surface of the first conductive block 1 is parallel to the top surfaces of the three sensing beams.

As shown in fig. 4, threaded holes 7 are formed in the second conductive block 6, the number of the threaded holes 7 is 4, and the 4 threaded holes 7 are distributed in a rectangular shape, so that the base body can be mounted at a position to be collected by using the threaded holes 7. Wherein, the object to be collected that the position of waiting to gather is located has seted up the second through-hole, utilizes behind this second through-hole of bolt or screw run-through with screw hole 7 cooperation realization base member's installation.

As shown in fig. 6 to 9, any outer surface of the three sensing beams is located on an outer surface of a rectangular parallelepiped or cube to facilitate position determination and adhesive curing as well as damage and replacement of the optical fiber sensor.

The utility model provides a three-dimensional solid physical power sensor based on optical fiber sensor, its includes that this scheme provides three-dimensional solid physical power sensor uses the base member, installs optical fiber sensor on the response roof beam, and three optical fiber sensor's direction is on a parallel with corresponding X respectively to, Y to and Z to. Wherein the directions of the coordinate system are as shown in figure 2.

As shown in fig. 10, the optical fiber sensor parallel to the X direction is installed on the top surface of the sensing beam 2 in the X direction and close to the corresponding through hole; as shown in fig. 11 and 12, the optical fiber sensors parallel to the Y direction and the Z direction are respectively installed on the other surface of the Y-direction sensing beam 3 and the Z-direction sensing beam 5 near one surface of the first conductive block and near the corresponding through hole. The optical fiber sensor is connected with a processing unit (the optical fiber sensor generally communicates with the processing unit through an optical fiber), and the processing unit is used for calculating the three-dimensional force according to the output value of the optical fiber sensor, wherein the calculation formula for calculating the three-dimensional force is as follows:

wherein, F_X、F_YAnd F_ZRespectively showing the force in the X direction, the force in the Y direction and the force in the Z direction, Delta lambda_X、Δλ_YAnd Δ λ_ZRespectively representing output values of the optical fiber sensors parallel to the X direction, the Y direction and the Z direction; k_ijRepresenting i-direction force and light parallel to j-directionThe coefficient of the relationship between the fiber sensor output wavelengths, i is X, Y or Z, j is X, Y or Z.

In implementation, the optical fiber sensor is preferably bonded to the sensing beam, specifically, bonded by strain glue. The types of the optical fiber sensor comprise an optical fiber Fabry-Perot sensor, an optical fiber grating sensor and an optical fiber sensor with a sensitivity-enhanced strain gauge.

The calibration method of the three-dimensional solid force sensor based on the optical fiber sensor comprises the following steps:

and respectively and independently loading the set times and the set magnitude of corresponding X-direction, Y-direction or Z-direction force to different optical fiber sensors, and recording the output values of all the optical fiber sensors after each loading is finished.

Determining the relation coefficient of the single corresponding loading force and the wavelength according to the magnitude of the corresponding X-direction, Y-direction or Z-direction force and the output value of the optical fiber sensor:

wherein i is X, Y or Z, j is X, Y or Z, F_iDenotes the magnitude of the loaded i-direction force, Δ λ_ijRepresenting the output value, K, of a fibre-optic sensor parallel to the j-direction when loaded with a corresponding i-direction force_ijA coefficient representing the relationship between the i-direction force and the output wavelength of the optical fiber sensor parallel to the j direction;

according to corresponding K_ijCalculate the corresponding K_ijAverage value of (a).

In practice, the forces applied in the same direction at different times are generally different in magnitude and are generally in an arithmetic progression.

In another embodiment, the magnitude of the force applied in the same direction at different times is the resilience data, so as to improve the calibration accuracy, which is described as an example below.

Table 1: loading data under X-Direction force

Table 2: loading data under Y-Direction force

Loading force/N	X-direction optical fiber sensor	Y-direction optical fiber sensor	Z-direction optical fiber sensor
				0	1545.412	1545.408	1545.539
20	1545.412	1545.39	1545.537
				40	1545.413	1545.373	1545.535
60	1545.414	1545.355	1545.533
				80	1545.414	1545.334	1545.531
100	1545.416	1545.316	1545.529
				80	1545.414	1545.334	1545.531
60	1545.414	1545.354	1545.533
				40	1545.413	1545.372	1545.535
20	1545.412	1545.39	1545.536
				0	1545.412	1545.408	1545.538

Table 3: loading data under Z-force

Loading force/N	X-direction optical fiber sensor	Y-direction optical fiber sensor	Z-direction optical fiber sensor
				0	1545.421	1545.361	1545.428
20	1545.424	1545.363	1545.371
				40	1545.426	1545.364	1545.312
60	1545.429	1545.365	1545.253
				80	1545.432	1545.366	1545.195
100	1545.436	1545.368	1545.132
				80	1545.433	1545.367	1545.195
60	1545.429	1545.366	1545.253
				40	1545.426	1545.366	1545.312
20	1545.424	1545.364	1545.371
				0	1545.422	1545.362	1545.429

The output values of the optical fiber sensors in tables 1 to 3 are in nm. Based on table 1 to table 3 and according to the utility model provides a calibration method calculates the relation coefficient between the fiber sensor output wavelength who obtains i to power and be on a parallel with j to as following table 4.

TABLE 4

	In the X direction	In the Y direction	In the Z direction
				X-direction optical fiber sensor	-0.00058	-2.1E-08	-7.9E-08
Y-direction optical fiber sensor	1.88E-07	-0.00092	-5.5E-08
				Z-direction optical fiber sensor	8.98E-07	2.75E-07	-0.00295

Claims

1. Three-dimensional solid for physical strength sensor base member based on optical fiber sensor, its characterized in that, the base member formula as an organic whole just is "clip" type, the base member is including first conduction piece (1) that is located the top and second conduction piece (6) that is located the bottom, clearance has between first conduction piece (1) and second conduction piece (6), connect through X to response roof beam (2), Y to response roof beam (3) and Z to response roof beam (5) that connect gradually between first conduction piece (1) and second conduction piece (6), first through-hole (4) have respectively been seted up on the response roof beam, the axial of first through-hole (4) is perpendicular to corresponding X respectively to, Y to and Z to.

2. The three-dimensional solid force sensor substrate according to claim 1, wherein the first through-hole (4) has a cross-section in a shape of "8".

3. The base body for a three-dimensional solid force sensor according to claim 1, wherein the first conductive block (1) and the second conductive block (6) are the same size.

4. The three-dimensional solid force sensor substrate according to claim 1, wherein the first conductive block (1) and the second conductive block (6) have a cubic or rectangular parallelepiped shape.

5. The base body for the three-dimensional solid force sensor according to claim 1, wherein the second conductive block (6) is provided with a threaded hole (7).

6. The three-dimensional solid force sensor substrate according to any one of claims 1 to 5, wherein any outer surface of the three sensing beams is located on an outer surface of a rectangular parallelepiped or cube.