Multi-column pressure sensor

Abstract

The invention discloses a multi-column pressure sensor, and relates to the technical field of pressure sensors, the multi-column pressure sensor comprises an elastic element, the elastic element comprises an upper force bearing plate, a lower force bearing plate and a plurality of column-shaped elastic bodies arranged between the upper force bearing plate and the lower force bearing plate, and the top of each column-shaped elastic body is spherical; the top of each columnar elastic body is of a spherical structure, bowl-shaped grooves matched with the columnar elastic bodies are formed in the upper force bearing plate, so that the columnar elastic bodies and the bowl-shaped grooves form a ball-and-socket joint shape, the top of each columnar elastic body is of a spherical structure, the bowl-shaped grooves matched with the columnar elastic bodies are formed in the upper force bearing plate, and a ball-and-socket joint-shaped connecting mode is formed; the ball-and-socket joint-shaped connection mode is used for connecting all the independent columnar elastic bodies together to form a complete sensor, and meanwhile, the ball-and-socket joint-shaped connection mode design allows the columnar elastic bodies to freely rotate in all directions, so that the columnar elastic bodies can independently deform when being stressed, and it is ensured that all the columnar elastic bodies can independently respond to external force.

Description

Technical Field

[0001] The invention relates to the field of pressure sensors, in particular to a multi-column pressure sensor. Background Art

[0002] A multi-column pressure sensor generally refers to a sensor used to measure pressure at multiple points or distributed pressure; this type of sensor is used in many industrial fields, such as oil drilling, geological exploration, mechanical equipment monitoring, etc.; they can measure pressure values ​​at multiple locations at the same time, which is very useful for applications that need to understand the pressure distribution of the entire system.

[0003] A Chinese patent with authorization announcement number CN204903069U discloses a cylindrical annular strain earth pressure sensor, including a cylindrical elastic sensing body, a resistance strain gauge, a strain gauge lead and a shell. The resistance strain gauge is adhered to the middle part of the cylindrical elastic sensing body in a circumferential manner, one end of the strain gauge lead is connected to the resistance strain gauge, and the other end of the strain gauge lead is connected to the resistance strain gauge. The shell is wrapped around the outer periphery of the cylindrical elastic sensing body. The cylindrical elastic sensing body adopts a cylindrical elastic entity composed of an elastic base material. The cylindrical elastic sensing body is additionally provided with a structure for improving the compressive modulus. The structure is integrally formed with the cylindrical elastic sensing body. The structure includes inner reinforcement and stirrups. The inner reinforcement is arranged inside the cylindrical elastic sensing body. The stirrups are circumferentially installed on the upper or lower side of the resistance strain gauge. The side surface of the cylindrical elastic sensing body preferably adopts a cylindrical elastic entity. The cylindrical elastic sensing body can obtain a series of sensors with different compressive moduli through the design and implementation of internal and external reinforcement, and can eliminate measurement errors to the greatest extent by matching and customizing with the object to be measured.

[0004] Cylindrical force sensors are widely used in industrial automation, robotics and material testing due to their compactness and ease of installation; however, when these sensors are subjected to lateral forces or eccentric loads, their measurement accuracy may be affected. This is due to two main reasons;

[0005] First, the traditional cylindrical force sensor adopts a single-layer diaphragm structure, which has a weak resistance to non-axial forces. Second, when the loading point deviates from the central axis of the sensor, the measurement accuracy of the sensor will decrease significantly.

[0006] To this end, the present invention proposes a multi-column pressure sensor to solve the above problems. Summary of the invention

[0007] In view of the above problems in the prior art, the present invention is proposed.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-column pressure sensor, comprising an elastic element, wherein the elastic element comprises an upper bearing plate, a lower bearing plate and a plurality of columnar elastomers arranged between the upper and lower bearing plates, the top of each columnar elastomer is spherically arranged, and a bowl-shaped groove matched with the columnar elastomer is opened on the upper bearing plate, so that the columnar elastomer and the bowl-shaped groove form a ball-and-socket joint, the plurality of columnar elastomers are integrally connected to the lower bearing plate, and strain gauges are embedded at different positions on the surface of the columnar elastomer to capture the column deformation of the columnar elastomer.

[0009] As a preferred solution of the multi-column pressure sensor described in the present invention, the plurality of columnar elastomers are evenly arranged around a central axis passing through the centers of the upper and lower load-bearing plates, and spiral reinforcing ribs are added along the axial direction inside each columnar elastomer to improve the torsional resistance of the columnar elastomer.

[0010] As a preferred solution of the multi-column pressure sensor described in the present invention, wherein: the number of the strain gauges is multiple, and the multiple strain gauges are located at different heights of each of the columnar elastic bodies to capture the column deformation at different positions; the multiple strain gauges are located along the outer peripheral surface of the same height on the columnar elastic body and are evenly distributed to detect the column deformation in different directions.

[0011] As a preferred solution of the multi-column pressure sensor described in the present invention, a pre-tightening spring is provided between the bottom of the columnar elastic body and the lower bearing plate to ensure that the columnar elastic body remains in a pre-tightened state when no external force is applied, so as to improve the sensitivity and response speed of the sensor.

[0012] As a preferred solution of the multi-column pressure sensor described in the present invention, a protrusion matching the pre-load spring is provided at the bottom of the columnar elastic body to support one end of the pre-load spring, and a groove is provided at the position corresponding to each columnar elastic body on the lower bearing plate to accommodate the other end of the pre-load spring. The size of the groove matches the diameter of the pre-load spring to accommodate the placement of the pre-load spring and prevent it from shifting, and a gasket is arranged between the columnar elastic body and the lower bearing plate to ensure uniform distribution of the pre-load force.

[0013] As a preferred solution of the multi-column pressure sensor of the present invention, it further comprises a processor, wherein the processor has an intelligent computing system, which comprises a signal acquisition module, a signal processing module, a data analysis module and a data output module;

[0014] The signal acquisition module includes collecting strain gauges at different heights and different positions at the same height on each columnar elastic body, receiving electrical signals from the strain gauges, and converting them into digital signals;

[0015] The signal processing module is used to amplify and filter the collected digital signals to remove noise and improve the quality of the digital signals;

[0016] The data analysis module analyzes and obtains the deformation amount of each columnar elastic body based on the processed digital signal, and comprehensively analyzes the deformation data of each columnar elastic body to determine the magnitude of the applied force;

[0017] The data output module converts the calculated information on the magnitude of the applied force into a standard digital signal for output.

[0018] As a preferred solution of the multi-column pressure sensor described in the present invention, the intelligent control system also includes a temperature compensation module, which includes a temperature sensor built between the upper and lower bearing plates. The temperature sensor is used to obtain the actual temperature of the pressure sensor during operation, and the signal is compensated according to the actual temperature.

[0019] As a preferred solution of the multi-column pressure sensor of the present invention, wherein: the intelligent computing system further includes a simulation strategy, the simulation strategy is configured with output voltage characteristic data sets at different pressures under standard temperature and non-standard temperature, and generates a temperature linear model and a temperature nonlinear model based on the voltage characteristic data sets;

[0020] Get the actual temperature of the pressure sensor when it is working;

[0021] The actual temperature of the pressure sensor during operation is compared with a pre-calibrated data set to determine the relationship between the temperature and the output signal, generate a compensated output signal, and correct the digital signal based on the compensated output signal.

[0022] As a preferred solution of the multi-column pressure sensor of the present invention, wherein: the simulation strategy also includes a temperature linear compensation algorithm model and a temperature nonlinear compensation algorithm model;

[0023] When the relationship between temperature and output signal is close to linear:

[0024] T=m×t i +b

[0025] Where T is the output signal after temperature compensation, t i is the actual temperature measured by the temperature sensor, m and b are regression coefficients;

[0026] When the relationship between temperature and output signal approaches nonlinearity:

[0027] T=m i2 ×t i 2 +m i3 ×ti +ai

[0028] Where T is the output signal after temperature compensation, t i is the actual temperature measured by the temperature sensor, m i2 、m i3 and ai are the coefficients of the temperature nonlinear model.

[0029] As a preferred solution of the multi-column pressure sensor of the present invention, the intelligent computing system further includes an algorithm strategy, and the algorithm strategy includes:

[0030] The output signals of strain gauges at different heights and positions on the surface of the columnar elastic body are obtained and converted into digital signals; the actual temperature of the pressure sensor when it is working is obtained, and the actual temperature of the pressure sensor when it is working is compared with the pre-calibrated data to generate a compensation output signal, and the digital signal is corrected based on the compensation output signal; the corrected digital signal is obtained, and the collected digital signal is pre-processed by amplification, filtering, etc.; the deformation of each columnar elastic body is analyzed and obtained based on the processed digital signal The deformation data of each columnar elastic body are comprehensively analyzed to determine the magnitude of the applied force F;

[0031] The algorithm strategy is also configured with a force measurement algorithm model, and the force measurement algorithm model:

[0032]

[0033] Wherein k is a proportional constant, which is obtained based on the elastic modulus of the material and the cross-sectional area parameter of the columnar elastic body, and n is the number of columnar elastic bodies.

[0034] Beneficial effects of the present invention: The present invention is composed of multiple independent columnar elastomers, each of which is embedded with a strain gauge. Each columnar elastomer can independently sense and respond to these non-axial forces, thereby improving the overall stability and accuracy of the sensor. By setting the top of each columnar elastomer to a spherical structure and providing a bowl-shaped groove matching it on the upper bearing plate, a ball-and-socket joint connection is formed. The ball-and-socket joint connection is used to connect each independent columnar elastomer together to form a complete sensor. At the same time, the ball-and-socket joint connection design allows the columnar elastomer to rotate freely in all directions, so that it can deform independently when subjected to force, and ensures that each columnar elastomer can respond to external forces independently, thereby achieving design optimization of the sensor structure, enhancing its resistance to non-axial forces, and reducing measurement errors caused by changes in the loading point position, thereby improving the overall performance and reliability of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0036] Figure 1 It is a schematic front view of the overall structure of the elastic element in the present invention.

[0037] Figure 2 It is a front cross-sectional view of the overall structure of the elastic element in the present invention.

[0038] Figure 3 It is a detailed structural diagram of the gasket in the present invention.

[0039] Figure 4 It is a schematic side view of the overall structure of the elastic element in the present invention.

[0040] Figure 5 It is a schematic diagram of the flow of generating simulation strategy in the present invention.

[0041] Figure 6 It is a flowchart diagram of the generation algorithm strategy of the present invention.

[0042] The accompanying drawings are marked as follows: 1. upper bearing plate; 2. columnar elastic body; 3. lower bearing plate; 4. strain gauge; 5. bowl-shaped groove; 6. spiral reinforcement rib; 7. preload spring; 8. annular groove; 9. gasket; 10. protrusion. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0046] Reference Figure 1 to Figure 6 As shown;

[0047] A multi-column pressure sensor includes an elastic element, which includes an upper bearing plate 1, a lower bearing plate 3 and a plurality of columnar elastic bodies 2 arranged between the upper and lower bearing plates 3. The top of each columnar elastic body 2 is spherically arranged, and a bowl-shaped groove 5 adapted to the columnar elastic body 2 is opened on the upper bearing plate 1, so that the columnar elastic body 2 and the bowl-shaped groove 5 form a ball-and-socket joint. The plurality of columnar elastic bodies 2 are integrally connected to the lower bearing plate 3, and strain gauges 4 are embedded at different positions on the surface of the columnar elastic body 2 to capture the column deformation of the columnar elastic body 2.

[0048] Specifically, the elastic element is made of alloy steel; alloy steel has high strength and hardness, which helps the cylindrical sensor maintain its shape when subjected to high loads and impacts, reduces deformation, and improves the reliability and life of the sensor; the stable elastic modulus of alloy steel helps to ensure the consistency and accuracy of the sensor during the measurement process; alloy steel has good fatigue resistance, can maintain its performance under multiple cyclic loads, and is not prone to fatigue damage.

[0049] Specifically, the ball-and-socket joint-like connection structure is designed to connect each independent columnar elastomer 2 together to form a complete sensor. At the same time, the ball-and-socket joint-like connection structure design allows the columnar elastomer 2 to rotate freely in all directions, so that it can deform independently when subjected to force, and ensures that each columnar elastomer 2 can respond independently to external forces.

[0050] Specifically, the ball-and-socket joint-like connection structure is designed so that when the multi-column pressure sensor is subjected to an eccentric load, its upper bearing plate 1 for directly contacting the object tilts toward the eccentric load center under the action of the eccentric load. The tilted upper bearing plate 1 drives part of the columnar elastomer 2 to have an upward deflection force. This eccentric load force will cause errors in the measurement accuracy of the multi-column pressure sensor, thereby reducing the measurement accuracy of the multi-column pressure sensor. The ball-and-socket joint-like connection structure ensures that the multiple columnar elastomers 2 are independent of each other and do not interfere with each other, thereby improving the measurement accuracy of the multi-column pressure sensor for eccentric loads.

[0051] In one embodiment, a plurality of columnar elastic bodies 2 are evenly arranged around a central axis that passes through the center of the upper and lower bearing plates 3 to ensure the overall balance and symmetry of the sensor;

[0052] The uniformly distributed columnar elastomers 2 have the following advantages: first, the uniformly distributed columnar elastomers 2 can ensure that the load applied to the load-bearing plate is evenly distributed to each columnar elastomer 2, thereby preventing a single columnar elastomer 2 from being damaged due to excessive stress; secondly, the uniformly distributed columnar elastomers 2 help to improve the overall stability of the system. Even in the case of eccentric loads, the unbalanced torque can be compensated through the interaction of multiple columnar elastomers 2.

[0053] Specifically, the columnar elastomer 2 is usually designed to be cylindrical or cylindrical-like in shape to ensure that its mechanical properties in different directions are consistent; secondly, the cylindrical design helps to disperse stress, reduce local stress concentration, and improve the reliability and stability of the sensor.

[0054] A spiral reinforcement rib 6 is added along the axial direction inside each columnar elastomer 2 to improve the torsional resistance of the columnar elastomer 2. The main function of the spiral reinforcement rib 6 is to improve the torsional resistance of the columnar elastomer 2. When the columnar elastomer 2 is subjected to torsional force, the spiral reinforcement rib 6 can effectively disperse the torque and reduce the torsional deformation of the columnar elastomer 2, thereby improving the measurement accuracy of the sensor. The material of the reinforcement rib is the same as that of the columnar elastomer 2 to ensure compatibility and stability between the two.

[0055] In one embodiment, there are multiple strain gauges 4, and the multiple strain gauges 4 are located at different heights of each columnar elastic body 2 to capture the column deformation at different positions; the multiple strain gauges 4 are located and evenly distributed along the outer peripheral surface of the same height on the columnar elastic body 2 to detect the column deformation in different directions.

[0056] Specifically, the uniform distribution of the strain gauges 4 ensures that the sensor can accurately capture the deformation of the columnar elastic body 2 in different directions and at different heights, thereby improving the resistance to non-axial forces and the measurement accuracy when the loading point is offset;

[0057] Specifically, when non-axial force acts on the sensor, the columnar elastic body 2 in different directions will experience different degrees of deformation. The deformation amount of each columnar elastic body 2 is output through the strain gauge 4. By comprehensively analyzing the deformation data of each columnar elastic body 2, the magnitude of the applied force can be determined more accurately.

[0058] When installing the strain gauge 4, please note: first, before installing the strain gauge 4, the surface of the columnar elastic body 2 needs to be cleaned and polished to ensure the adhesion quality of the strain gauge 4; during the installation of the strain gauge 4, it is necessary to ensure that the strain gauge 4 is in close contact with the columnar elastic body 2 to avoid bubbles and gaps affecting the measurement accuracy.

[0059] In one embodiment, a preload spring 7 is provided between the bottom of the columnar elastic body 2 and the lower bearing plate 3 to ensure that the columnar elastic body 2 remains in a preloaded state when no external force is applied, so as to improve the sensitivity and response speed of the sensor.

[0060] Specifically, a protrusion 10 matching the preload spring 7 is provided at the bottom of the columnar elastic body 2 for supporting one end of the preload spring 7, and an annular groove 8 is provided at the position corresponding to each columnar elastic body 2 on the lower bearing plate 3 to accommodate the other end of the preload spring 7. The size of the annular groove 8 matches the diameter of the preload spring 7 to accommodate the placement of the preload spring 7 and prevent displacement, and a gasket 9 is arranged between the columnar elastic body 2 and the lower bearing plate 3 to ensure uniform distribution of the preload force.

[0061] Specifically, a protrusion 10 matching the preload spring 7 is provided at the bottom of each columnar elastomer 2. The main function of this protrusion 10 is to serve as a supporting point at one end of the preload spring 7. When the preload spring 7 is compressed, it will press against this protrusion 10, thereby transferring the preload force to the columnar elastomer 2; the preload spring 7 is located in the annular groove 8 between the protrusion 1O at the bottom of the columnar elastomer 2 and the lower bearing plate 3; its main function is to provide a preload force when there is no external force, so that the columnar elastomer 2 is in a preloaded state, and a gasket 9 is arranged between the columnar elastomer 2 and the lower bearing plate 3; the main function of the gasket 9 is to ensure that the preload force can be evenly distributed on the entire contact surface. If there is no gasket 9, the preload force may be concentrated on certain points, resulting in uneven force, which in turn affects the performance of the sensor.

[0062] Advantages of the preload spring 7: When the preload spring 7 is in the preload state, even in the absence of an external load, the columnar elastic body 2 is subjected to a certain initial pressure, so that the sensor can respond faster and detect smaller changes;

[0063] The columnar elastic body 2 will deform when subjected to external load, and the presence of the preload spring 7 can reduce the hysteresis effect of the pressure deformation, that is, the speed of returning to the initial state after unloading is faster;

[0064] By ensuring that the columnar elastic body 2 is always in a pre-tightened state, the nonlinear effect caused by a sudden change in the external load can be reduced, thereby improving the measurement accuracy of the entire sensor system.

[0065] In one embodiment, a multi-column pressure sensor further includes a processor, the processor having an intelligent computing system, which includes a signal acquisition module, a signal processing module, a data parsing module, and a data output module, wherein these modules work together to ensure that the sensor can accurately detect and quantify the force applied thereto;

[0066] The signal acquisition module includes collecting the strain gauges 4 at different heights and different positions of the same height on each columnar elastic body 2, receiving the electrical signals from the strain gauges 4, and converting them into digital signals. This module is responsible for collecting electrical signals from the strain gauges 4 at different heights and different positions on the surface of the columnar elastic body 2. The strain gauge 4 is a sensor that can convert physical deformation into electrical signals. According to the deformation of the columnar elastic body 2, the resistance value of the strain gauge 4 attached to the columnar elastic body 2 changes, and then the signal is output. In this embodiment, each columnar elastic body 2 is equipped with a plurality of strain gauges 4, which are distributed at different heights and positions to capture the most comprehensive deformation information;

[0067] The signal processing module is used to amplify and filter the collected digital signals to remove noise and improve the quality of digital signals;

[0068] The data analysis module analyzes and obtains the deformation amount of each columnar elastic body 2 based on the processed digital signal, and comprehensively analyzes the deformation data of each columnar elastic body 2 to determine the magnitude of the applied force;

[0069] The data output module converts the calculated applied force information into a standard digital signal output.

[0070] The intelligent control system also includes a temperature compensation module, which includes a temperature sensor built between the upper and lower bearing plates 3. The temperature sensor is used to obtain the actual temperature of the pressure sensor during operation, and the signal is compensated according to the actual temperature to eliminate the influence of temperature.

[0071] The intelligent computing system also includes a simulation strategy, which is configured with output voltage characteristic data sets at different pressures at standard temperatures and non-standard temperatures, and generates a temperature linear model and a temperature nonlinear model based on the voltage characteristic data sets;

[0072] Get the actual temperature of the pressure sensor when it is working;

[0073] The actual temperature of the pressure sensor during operation is compared with a pre-calibrated data set to determine the relationship between the temperature and the output signal, generate a compensated output signal, and correct the digital signal based on the compensated output signal.

[0074] The simulation strategy also includes a temperature linear compensation algorithm model and a temperature nonlinear compensation algorithm model;

[0075] When the relationship between temperature and output signal is close to linear:

[0076] T=m×t i +b

[0077] Where T is the output signal after temperature compensation, t iis the actual temperature measured by the temperature sensor, m and b are regression coefficients;

[0078] When the relationship between temperature and output signal approaches nonlinearity:

[0079] T=m i2 ×t i 2 +m i3 ×t i +ai

[0080] Where T is the output signal after temperature compensation, t i is the actual temperature measured by the temperature sensor, m i2 、m i3 and ai are the coefficients of the temperature nonlinear model.

[0081] Intelligent computing systems also include algorithmic strategies, which include:

[0082] The output signals of the strain gauge 4 at different heights and positions on the surface of the columnar elastic body 2 are obtained and converted into digital signals; the actual temperature of the pressure sensor when working is obtained, and the actual temperature of the pressure sensor when working is compared with the pre-calibrated data to generate a compensation output signal, and the digital signal is corrected based on the compensation output signal; the corrected digital signal is obtained, and the collected digital signal is pre-processed by amplification, filtering, etc.; based on the processed digital signal, the deformation amount of each columnar elastic body 2 is analyzed and obtained And comprehensively analyze the deformation data of each columnar elastic body 2 to determine the magnitude of the applied force F;

[0083] The algorithm strategy is also configured with a force measurement algorithm model. The force measurement algorithm model:

[0084]

[0085] In the formula, k is a proportional constant, which is obtained based on the elastic modulus of the material and the cross-sectional area parameter of the columnar elastic body 2 , and n is the number of the columnar elastic bodies 2 .

[0086] Multi-column pressure sensors can accurately measure force and perform temperature compensation based on the actual operating temperature of the sensor, thus ensuring reliable and accurate measurement results in different environments.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A multi-column pressure sensor, comprising an elastic element, Features: The elastic element comprises an upper bearing plate (1), a lower bearing plate (3) and a plurality of columnar elastic bodies (2) arranged between the upper and lower bearing plates (3); a spherical arrangement is arranged at the top of each columnar elastic body (2); a bowl-shaped groove (5) adapted to the columnar elastic body (2) is provided on the upper bearing plate (1), so that the columnar elastic body (2) and the bowl-shaped groove (5) form a ball-and-socket joint; the plurality of columnar elastic bodies (2) are integrally connected to the lower bearing plate (3); strain gauges (4) are embedded at different positions on the surface of the columnar elastic body (2) for capturing the column deformation of the columnar elastic body (2).

2. The multi-column pressure sensor according to claim 1, Features: The plurality of columnar elastic bodies (2) are evenly arranged around a central axis passing through the center of the upper and lower bearing plates (3), and a spiral reinforcing rib (6) is added inside each columnar elastic body (2) along its axial direction to improve the torsional resistance of the columnar elastic body (2).

3. The multi-column pressure sensor according to claim 2, Features: The number of the strain gauges (4) is multiple, and the multiple strain gauges (4) are located at different heights of each columnar elastic body (2) to capture the column deformation at different positions; the multiple strain gauges (4) are located along the outer peripheral surface of the same height on the columnar elastic body (2) and are evenly distributed to detect the column deformation in different directions.

4. The multi-column pressure sensor according to claim 3, Features: A preload spring (7) is provided between the bottom of the columnar elastic body (2) and the lower bearing plate (3) to ensure that the columnar elastic body (2) remains in a preloaded state when no external force is applied, thereby improving the sensitivity and response speed of the sensor.

5. The multi-column pressure sensor according to claim 4, Features: A protrusion (10) matching the preload spring (7) is provided at the bottom of the columnar elastic body (2) for supporting one end of the preload spring (7). An annular groove (8) is provided on the lower bearing plate (3) at a position corresponding to each columnar elastic body (2) to accommodate the other end of the preload spring (7). The size of the annular groove (8) matches the diameter of the preload spring (7) to accommodate the placement of the preload spring (7) and prevent it from shifting. A washer (9) is arranged between the columnar elastic body (2) and the lower bearing plate (3) to ensure uniform distribution of the preload force.

6. The multi-column pressure sensor according to claim 5, Features: Also includes a processor, the processor has an intelligent computing system, which includes a signal acquisition module, a signal processing module, a data analysis module and a data output module; The signal acquisition module includes collecting the strain gauges (4) at different heights and different positions at the same height on each columnar elastic body (2), receiving the electrical signals from the strain gauges (4), and converting them into digital signals; The signal processing module is used to amplify and filter the collected digital signal to remove noise and improve the quality of the digital signal; The data analysis module analyzes and obtains the deformation amount of each columnar elastic body (2) based on the processed digital signal, and comprehensively analyzes the deformation data of each columnar elastic body (2) to determine the magnitude of the applied force; The data output module converts the calculated information on the magnitude of the applied force into a standard digital signal for output.

7. The multi-column pressure sensor according to claim 6, Features: The intelligent control system further comprises a temperature compensation module, which comprises a temperature sensor built between the upper and lower bearing plates (3), and uses the temperature sensor to obtain the actual temperature of the pressure sensor when it is working, and compensates the signal according to the actual temperature.

8. The multi-column pressure sensor according to claim 7, Features: The intelligent computing system also includes a simulation strategy, which is configured with output voltage characteristic data sets at different pressures under standard temperature and non-standard temperature, and generates a temperature linear model and a temperature nonlinear model based on the voltage characteristic data sets; Get the actual temperature of the pressure sensor when it is working; The actual temperature of the pressure sensor during operation is compared with a pre-calibrated data set to determine the relationship between the temperature and the output signal, generate a compensated output signal, and correct the digital signal based on the compensated output signal.

9. The multi-column pressure sensor according to claim 8, Features: The simulation strategy also includes a temperature linear compensation algorithm model and a temperature nonlinear compensation algorithm model; When the relationship between temperature and output signal is close to linear: T=m×t+b Where T is the output signal after temperature compensation, t i is the actual temperature measured by the temperature sensor, m and b are regression coefficients; When the relationship between temperature and output signal approaches nonlinearity: T=m i2 ×t i 2 +m i3 ×t i +you Where T is the output signal after temperature compensation, t i is the actual temperature measured by the temperature sensor, m i2 、m i3 and ai are the coefficients of the temperature nonlinear model.

10. The multi-column pressure sensor according to claim 9, Features: The intelligent computing system also includes an algorithm strategy, which includes: The output signals of the strain gauges (4) at different heights and positions on the surface of the columnar elastic body (2) are obtained and converted into digital signals; the actual temperature of the pressure sensor when it is working is obtained, and the actual temperature of the pressure sensor when it is working is compared with pre-calibrated data to generate a compensation output signal, and the digital signal is corrected based on the compensation output signal; the corrected digital signal is obtained, and the collected digital signal is amplified and filtered for pre-processing; based on the processed digital signal, the deformation amount of each columnar elastic body (2) is analyzed and obtained and comprehensively analyzing the deformation data of each columnar elastic body (2) to determine the magnitude of the applied force F; The algorithm strategy is also configured with a force measurement algorithm model, and the force measurement algorithm model: In the formula, k is a proportional constant obtained based on the elastic modulus of the material and the cross-sectional area parameter of the columnar elastic body (2), and n is the number of the columnar elastic bodies (2).

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