A sensor fast calibration device

Abstract

This utility model discloses a rapid sensor calibration device, comprising: a main component, and a platform mechanism, a vertical loading mechanism, a horizontal loading mechanism, a power distribution box, and a sensor fixture assembly mounted on the main component; the platform mechanism and the sensor fixture assembly are installed inside the main component, the platform mechanism positions the sensor fixture assembly, the vertical loading mechanism and the horizontal loading mechanism are mounted on the main component, the vertical loading mechanism passes through the top of the main component and cooperates with the horizontal loading mechanism to contact the sensor fixture assembly, and collects the current loading force in the sensor fixture assembly in real time to calibrate the sensors installed in the sensor fixture assembly. This utility model can shorten the calibration cycle, automatically record the calibration results of each calibration, output calibration result charts or tables with one click, and also realize calibration at the same workstation.

Description

Technical Field

[0001] This utility model relates to the field of sensor calibration technology, specifically to a rapid sensor calibration device. Background Technology

[0002] With the accelerated implementation of smart manufacturing and the Internet of Things, sensors, as "data entry points," are widely used in automotive electronics, industrial automation, aerospace, and medical fields. However, whether it is a pressure, temperature, or vision sensor, all sensors need to undergo rigorous calibration (zero point, sensitivity, temperature drift, nonlinearity, installation error, etc.) before being deployed in batches.

[0003] Traditional calibration processes suffer from numerous problems. Firstly, they are time-consuming, with the average calibration time for a single sensor around one hour. For multi-parameter coupled sensors, repeated handling, disassembly, and calibration can extend the time to as much as eight hours per sensor. Secondly, manual parameter entry and result judgment rely on experience, leading to errors and difficulties in traceability. Finally, technological advancements and updates have placed higher demands on sensor calibration in certain specialized industries. For example, in the humanoid robot industry, multimodal sensors, including those for mechanics and vision, require simultaneous calibration at the same workstation; otherwise, the assembly cycle cannot be compressed, and significant errors in the calibration parameters are likely. In summary, sensor calibration equipment directly increases manufacturing costs and limits the ability to rapidly mass-produce new products.

[0004] To address this, a rapid sensor calibration device is proposed. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this invention is to provide a rapid sensor calibration device that can shorten the calibration cycle, automatically record the calibration results for each calibration, output calibration result charts or tables with one click, and enable calibration to be completed at the same workstation. In addition to the above advantages, it also features a simple structure, small footprint, convenient disassembly and transportation, and low manufacturing cost.

[0006] This was achieved through the following technical solutions: A rapid sensor calibration device includes a main assembly, and a platform mechanism, a vertical loading mechanism, a horizontal loading mechanism, a power distribution box, and a sensor fixture assembly mounted on the main assembly. The platform mechanism and sensor fixture assembly are installed inside the main assembly. The platform mechanism positions the sensor fixture assembly. The vertical and horizontal loading mechanisms are mounted on the main assembly. The vertical loading mechanism passes through the top of the main assembly and cooperates with the horizontal loading mechanism to contact the sensor fixture assembly, collecting the current loading force in the sensor fixture assembly in real time to calibrate the sensors installed in the assembly. This device has a simple structure, small footprint, is easy to assemble, disassemble, and transport, and has low manufacturing costs.

[0007] Preferably, the platform mechanism includes an XY hand-cranked platform, fixed blocks, positioning irons, set screws, set screw seats, a large plate, and positioning blocks. Multiple fixed blocks are arranged on adjacent sides of the XY hand-cranked platform. Each fixed block is connected to the large plate on the XY hand-cranked platform via a positioning iron. On the other side of the XY hand-cranked platform corresponding to the multiple fixed blocks, multiple set screw seats are arranged via set screws. The set screw seats are used to tighten the large plate on the XY hand-cranked platform. The large plate has multiple threaded holes, and multiple positioning blocks arranged at right angles are also installed on the large plate. The position of the large plate can be moved by operating the XY hand-cranked platform.

[0008] Preferably, the main assembly includes a base, columns, a top cover, and shims. Multiple columns are inserted into the base, with the tops of the columns abutting the top cover. Adjustable shims are installed below the base. The main assembly provides an installation reference and rigid support for all functional components, ensuring that the equipment does not deform or shift under high pressure, impact, or vibration conditions.

[0009] Preferably, the vertical loading mechanism includes a direct-push electric actuator, a telescopic fixing base, a linear bearing, a vertical loading shaft, a vertical high-precision sensor, and a vertical loading head. A direct-push electric actuator, composed of a servo motor and an electric actuator, is mounted above the telescopic fixing base. A linear bearing is mounted below the telescopic fixing base, and a vertical high-precision sensor and a vertical loading head are sequentially mounted below the linear bearing. A vertical loading shaft is fitted inside the linear bearing; the upper end of the vertical loading shaft connects to the push rod extending from the electric actuator, and the lower end connects to the vertical high-precision sensor. Through a precise transmission and monitoring process, vertical pressure is applied to the workpiece under test. Simultaneously, the loading force data monitored by the mechanism itself and the loading force data output by the workpiece under test are acquired. By comparing the results of these two sets of data, the pass / fail status of the workpiece under test is determined, ensuring the accuracy and reliability of the test.

[0010] Preferably, the lateral loading mechanism includes a middle frame, guide holes, a locking cover plate, a vertical electric push rod, a lateral loading shaft, a lateral high-precision sensor, a lateral loading head, a telescopic connecting seat, and a round flange oil-free bushing. The middle frame has multiple guide holes for the column to pass through. Each guide hole contains an expansion sleeve, and a locking cover plate is installed above each guide hole. The expansion sleeve and locking cover plate lock the middle frame to the column. A vertical electric push rod is installed between adjacent guide holes. One end of each vertical electric push rod passes through the middle frame and connects to one end of the lateral loading shaft. The other end of the lateral loading shaft is sequentially equipped with a lateral high-precision sensor and a lateral loading head. The lateral loading shaft is located within the middle frame. The high-precision sensor monitors the loading force data in real time. Combined with the feedback from the interaction between the lateral loading head and the test piece, the mechanism meets the testing requirements related to lateral loads on the test piece, determines whether the performance of the test piece under lateral force conditions meets the standards, and ensures the stability of the testing process and the accuracy of the results.

[0011] Preferably, a telescopic connecting seat is installed at the connection between each vertical electric actuator and the intermediate frame, and a round flange oil-free bushing is installed between the intermediate frame and the lateral high-precision sensor. Under the guidance and constraint of the oil-free bushing, the lateral loading shaft can maintain high accuracy and stability during extension and retraction movements.

[0012] Preferably, the sensor fixture assembly includes a fixture base plate, a support member, a sensor, a fixture cover plate, and a limiting mechanism. The fixture base plate is placed on a large flat plate and pressed against a positioning block. A support member for supporting the sensor is installed on the fixture base plate, the sensor is installed on the support member, and the fixture cover plate is installed on the sensor. A limiting mechanism for limiting the position of the fixture cover plate is installed on one side. The sensor fixture assembly is a dedicated fixture for placing sensors. During vertical / horizontal loading head impact, data from the vertical / horizontal high-precision sensor and the sensor to be calibrated in the fixture assembly are read according to the impact distance. Finally, by comparing these two sets of data, it is determined whether the accuracy of the sensor in the fixture assembly meets the design requirements.

[0013] Preferably, the distribution box includes a control cabinet, alarm lights, control cabinet buttons, and a control cabinet door installed on the control cabinet, with multiple support bases installed below the control cabinet. The distribution box safely and efficiently distributes electrical energy from the external power grid to the various execution units of the equipment and realizes the automation logic of the equipment through the control system.

[0014] Preferably, it also includes an equipment protective cover over the main component. The equipment protective cover includes a main frame, and protective panels, protective windows, and protective doors installed on the main frame. Multiple feet are installed under the main frame. The equipment protective cover is used to protect machinery, operators, and the surrounding environment.

[0015] The advantages of this utility model compared with the prior art are: 1. The calibration time has been significantly reduced, decreasing the average calibration time for a single sensor from approximately one hour to two-thirds, and the calibration time for multi-parameter coupled sensors to three-quarters. Various fixtures and their placement positions can be pre-assembled and adjusted, greatly improving calibration time efficiency. It also supports simultaneous calibration at the same workstation; the sensor position corresponding to the large plate remains fixed, and calibration at different positions can be achieved simply by manually adjusting the platform mechanism. The equipment has a simple structure, is easy to operate, and convenient to maintain.

[0016] 2. Improved parameter accuracy: The equipment autonomously records the calibration process and generates reports, eliminating the need for manual intervention throughout the process, greatly reducing the error rate and ensuring data accuracy.

[0017] 3. The equipment is equipped with a protective cover, which reduces personnel injury during operation and increases the overall lifespan of the equipment. The equipment is highly stable; its main structural components are made of cast iron and undergo aging treatment, allowing it to maintain stability under vibration and impact. In the event of slight shaking, the equipment can absorb some of the vibration, improving the accuracy of calibration results. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of the device protective cover added to this utility model; Figure 2 This is a schematic diagram of the structure of the present invention without the protective cover of the equipment; Figure 3 This is a schematic diagram of the main component structure of this utility model; Figure 4 This is a schematic diagram of the platform structure of this utility model; Figure 5 This is a schematic diagram of the vertical loading mechanism of this utility model; Figure 6 This is a schematic diagram of the transverse loading mechanism of this utility model; Figure 7 This is a schematic diagram of the sensor fixture assembly structure of this utility model; Figure 8 This is a schematic diagram of the distribution box structure of this utility model; Figure 9 This is a schematic diagram of the structure of the protective cover for the equipment of this utility model.

[0019] In the diagram: 1. Main component; 2. Platform mechanism; 3. Vertical loading mechanism; 4. Horizontal loading mechanism; 5. Power distribution box; 6. Sensor fixture assembly; 7. Equipment protective cover; 11. Base; 12. Column; 13. Top cover; 14. Shim; 15. Pad; 21. XY hand-cranked platform; 22. Fixing block; 23. Positioning iron; 24. Ejector screw; 25. Ejector screw seat; 26. Large plate; 27. Positioning block; 31. Direct-push electric actuator; 32. Telescopic mounting base; 33. Linear bearing; 34. Vertical loading shaft; 35. Vertical high-precision sensor; 36. Vertical loading head; 41. Intermediate frame; 42. Guide hole; 421. Locking cover plate; 43. Vertical electric push rod; 44. Lateral loading shaft; 45. Lateral high-precision sensor; 46. Lateral loading head; 47. Telescopic connecting seat; 48. Bushing; 51. Control cabinet; 52. Alarm light; 53. Control cabinet buttons; 54. Control cabinet door; 55. Support base; 61. Fixture base plate; 62. Support component; 63. Sensor; 64. Fixture cover plate; 65. Limiting mechanism; 71. Main frame; 72. Protective panel; 73. Protective window; 74. Protective door; 75. Foundation. Detailed Implementation

[0020] The technical solutions of the present invention will now be described in detail with reference to the accompanying drawings of the embodiments.

[0021] like Figures 1-2 As shown, a rapid sensor calibration device is provided, including a main component 1, and a platform mechanism 2, a vertical loading mechanism 3, a horizontal loading mechanism 4, a power distribution box 5, and a sensor fixture assembly 6 mounted on the main component 1. The sensor fixture assembly 6 is mounted on the platform mechanism 2, and both the sensor fixture assembly 6 and the platform mechanism 2 are installed within the main component 1. The platform mechanism 2 positions the sensor fixture assembly 6. The vertical loading mechanism 3 and the horizontal loading mechanism 4 contact the sensor fixture assembly 6 from the vertical and horizontal directions, respectively, to perform loading tests on the sensors 63 in the sensor fixture assembly 6. Ultimately, this satisfies the accuracy detection requirements during the calibration process of the sensors 63, thereby determining whether the accuracy of the sensors 63 in the sensor fixture assembly 6 meets the design requirements.

[0022] like Figure 3 As shown, the main component 1 includes a base 11, columns 12, a top cover 13, and shims 14. Multiple columns 12 are inserted into the base 11, with four columns in total. Each column 12 is inserted into one of the four holes around the base 11, and a nut is installed at the bottom of each column 12 to lock and secure it to the base 11. The top of each column 12 rests against the top cover 13, which has a hole in the center for the vertical loading mechanism 3 to pass through. Shims 14 are located under the base 11 for adjustment. Adjustment shims 15 can be added below the shims 14 depending on the height of the equipment. The base 11 and top cover 13 are QT450 castings that have undergone aging treatment and are then machined with high precision. Main component 1 is a lasting guarantee for the stability, accuracy and durability of the equipment. When designing it, it is necessary to take into account mechanical performance, functional integration and environmental adaptability, and provide installation benchmarks and rigid supports for all functional components to ensure that the equipment does not deform or shift under high pressure, impact or vibration conditions.

[0023] like Figure 4As shown, the platform mechanism 2 includes an XY hand-cranked platform 21, a fixing block 22, a positioning iron 23, a set screw 24, a set screw seat 25, a large plate 26, and a positioning block 27. The platform mechanism 2 is one of the main mechanisms of the equipment. The platform mechanism 2 is installed above the base 11 inside the main component 1. The XY hand-cranked platform 21 is a cast iron inlaid platform, which has the characteristics of high positioning accuracy and strong stability. The position of the large plate 26 can be moved by manually operating the XY hand-cranked platform 21.

[0024] Multiple fixing blocks 22 are arranged on adjacent sides of the XY hand-cranked platform 21. There are two sets of fixing blocks 22, with each set located at both ends of the side of the XY hand-cranked platform 21. The fixing blocks 22 primarily serve a limiting function, restricting the large plate 26 and the positioning iron 23. Each fixing block 22 is connected to the large plate 26 on the XY hand-cranked platform 21 via the positioning iron 23. One end of the positioning iron 23 is connected to the large plate 26, and the other end has a hole for the fixing block 22 to be inserted. The fixing block 22 moves telescopically within the positioning iron 23. The positioning iron 23 is a high-precision iron block that has undergone heat treatment and grinding, allowing the XY hand-cranked platform 21 to move to a specific position. The specific position length is determined by the length of the positioning iron 23.

[0025] On the other side of the XY hand-cranked platform 21 corresponding to the two sets of fixing blocks 22, there are multiple set screw seats 25 installed by set screws 24. There are also two sets of set screw seats 25, which are symmetrical to the two sets of fixing blocks 22. The function of the set screw seats 25 is to tighten the set screws 24 to hold the large plate 26 in place after the large plate 26 is moved to the fixed position, so that the large plate 26 will not have short-distance displacement when loaded.

[0026] The large plate 26 is a plate with a certain thickness. The plate has a high degree of flatness and a high degree of verticality on its sides. The plate has multiple threaded holes arranged in a matrix to facilitate the installation of other mechanisms. The large plate 26 also has multiple positioning blocks 27 installed on it. The positioning blocks 27 are arranged in pairs at right angles to facilitate the positioning and placement of the sensor fixture assembly.

[0027] The operator manually rotates the handwheel, causing the XY hand-cranked platform 21 to slide. The large plate 26 mounted on the XY hand-cranked platform 21 moves horizontally. The fixed blocks 22 on both sides of the XY hand-cranked platform 21 restrict the movement range. The positioning iron 23 is placed between the large plate 26 and the fixed blocks 22. The large plate 26 stops at the set position. The set screw 24 on the set screw seat 25 is tightened, pressing the large plate 26 firmly. A fixture is installed through the threaded hole on the large plate 26, and the workpiece or fixture is positioned against the positioning block 27. At this point, the first stage of inspection is performed. If the workpiece requires a second stage of inspection, the set screw 24 is loosened, the positioning iron 23 is removed, and the X and Y handwheels of the XY hand-cranked platform 21 are rotated in the opposite direction. The large plate 26 moves from its original position until it is against the fixed block 22. Then, the set screw 24 is tightened again, and the second stage of inspection is performed.

[0028] like Figure 5 As shown, the vertical loading mechanism 3 includes a direct-push electric push rod 31, a telescopic fixed seat 32, a linear bearing 33, a vertical loading shaft 34, a vertical high-precision sensor 35, and a vertical loading head 36; the vertical loading mechanism 3 is installed on the top cover 13 of the main body component 1 and extends into the main body component 1 through the top cover 13.

[0029] The telescopic fixing base 32, a machined steel component, serves as a connector and support. It connects to a direct-push electric actuator 31 above and a linear bearing 33 below, providing a stable foundation for the movement of the entire mechanism. The direct-push electric actuator 31, a combination of a servo motor and an electric actuator structure, is the core drive component. When the servo motor receives a signal, it drives the electric actuator to move up and down. The telescopic fixing base 32, as a machined steel component, serves as a connector and support, connecting to the direct-push electric actuator 31 above and a linear bearing 33 below, providing a stable foundation for the movement of the entire mechanism.

[0030] A vertical high-precision sensor 35 and a vertical loading head 36 are sequentially installed below the linear bearing 33. The linear bearing 33 is a high-precision steel structure bearing sleeve, in which a high-rigidity vertical loading shaft 34 is fitted. The upper end of the vertical loading shaft 34 is connected to the push rod extending from the electric push rod. Under the action of the linear bearing 33, the vertical loading shaft 34 can maintain high lubricity and high coaxiality accuracy when moving up and down. The lower end of the vertical loading shaft 34 is connected to the vertical high-precision sensor 35.

[0031] The vertical loading head 36 is a metal component with a steel ball at the top, and the ball head extending from the bottom can directly contact the workpiece being measured. When the electric push rod drives the vertical loading shaft 34, the vertical high-precision sensor 35, and the vertical loading head 36 to move sequentially, the vertical loading head 36 applies pressure to the workpiece being measured. The vertical high-precision sensor 35 reads the specific information of the current loading force in real time and displays this information on the computer screen through the software system. At the same time, the workpiece being measured also outputs the loading force data.

[0032] The function of the vertical loading mechanism 3 is to apply vertical pressure to the test piece through the above-mentioned precise transmission and monitoring process, and at the same time acquire the loading force data monitored by the mechanism itself and the loading force data output by the test piece. By comparing the results of these two sets of data, it is determined whether the test piece is qualified, so as to ensure the accuracy and reliability of the test piece inspection.

[0033] like Figure 6 As shown, the transverse loading mechanism 4 includes an intermediate frame 41, a guide hole 42, a locking cover plate 421, a vertical electric push rod 43, a transverse loading shaft 44, a transverse high-precision sensor 45, a transverse loading head 46, a telescopic connecting seat 47, and a round flange oil-free bushing 48. The transverse loading mechanism 4 is installed on three of the columns 12 of the main body component 1. The columns 12 have high rigidity and high precision.

[0034] The intermediate frame 41 is an aged QT450 casting with a right-angle shape and high stability. The intermediate frame 41 is provided with multiple guide holes 42 for the columns 12 to pass through. The guide holes 42 are located at both ends and the middle of the intermediate frame 41, with a total of three guide holes 42. Three of the columns 12 in the main body component 1 pass through the three guide holes 42 respectively. Each guide hole 42 is provided with an expansion sleeve, which, together with the locking cover plate 421 installed above each guide hole 42, forms a locking mechanism to securely lock the intermediate frame 41 to the three guide columns, providing a stable foundation for subsequent loading.

[0035] A vertical electric actuator 43 is installed between two adjacent guide holes 42, and two vertical electric actuators 43 are installed in the three guide holes 42. Each vertical electric actuator 43 is connected to the intermediate frame 41 through a telescopic connecting seat 47, which is a machined steel part. One end of each vertical electric actuator 43 passes through the inside of the intermediate frame 41 and connects to one end of the transverse loading shaft 44. The other end of the transverse loading shaft 44 is sequentially equipped with a transverse high-precision sensor 45 and a transverse loading head 46. The transverse loading shaft 44 is located inside the intermediate frame 41. When the two vertical electric actuators 43 receive a running signal, they generate driving force, which, with the help of the telescopic connecting seat 47, drives the transverse loading shaft 44 connected to it to move. As the transverse loading shaft 44 moves, the transverse loading head 46 applies a transverse load to the workpiece. During this process, the transverse high-precision sensor 45 collects the specific information of the current loading force in real time and processes and feeds it back through the corresponding system.

[0036] The installed transverse loading mechanism 4 applies a stable and precise transverse load to the test piece, meeting the testing requirements related to transverse load and ensuring the stability of the testing process and the accuracy of the results. Furthermore, a round flange oil-free bushing 48 is installed at the connection between the intermediate frame 41 and the transverse high-precision sensor 45. Under the guidance and constraint of the bushing 48, the transverse loading shaft 44 can maintain high precision and stability during its extension and retraction movements.

[0037] The function of the lateral loading mechanism 4 is to rely on a stable locking and fixing structure and precise transmission and guiding components to drive the lateral loading head 46 through two vertical electric push rods 43 to apply a stable and precise lateral load to the test piece. At the same time, the lateral high-precision sensor 45 monitors the loading force data in real time. Combined with the feedback from the interaction between the lateral loading head 46 and the test piece, it meets the testing requirements related to lateral load on the test piece, determines whether the performance of the test piece under lateral force meets the standard, and ensures the stability of the testing process and the accuracy of the results.

[0038] like Figure 7As shown, the sensor fixture assembly 6 includes a fixture base plate 61, a support member 62, a sensor 63, a fixture cover plate 64, and a limiting mechanism 65. The sensor fixture assembly 6 is a special fixture for placing the sensor 63. It needs to be installed on the large plate 26 in conjunction with the platform mechanism 2, and must be placed close to the positioning block 27. The entire fixture has excellent flatness, parallelism, and perpendicularity, which can ensure that the sensor 63 is in a good state for calibration before calibration. At the same time, the sensor fixture assembly 6 needs to be adapted according to the different styles of the sensor 63. Currently, the large square sensor fixture is the representative. The fixture base plate 61 is placed on the large plate 26, the support member 62 is installed on the fixture base plate 61 to support the sensor 63, and the limiting mechanism 65 is used to limit the clamp cover plate 64, which is connected above the sensor 63.

[0039] Install the fixture base plate 61, support 62, sensor 63, and fixture cover plate 64 one by one into place, then install the fixing screws. After assembly, wait for the loading heads of the vertical loading mechanism 3 and the horizontal loading mechanism 4 to slowly impact the sensor 63. If the vertical loading mechanism 3 requires a long stroke to complete loading due to the sensor 63 being too short, a matching fixture loading head can be inserted into the sensor fixture group 6. If the horizontal loading mechanism 4 has insufficient stroke due to the sensor 63 moving, replace it with the long loading head mechanism provided with the equipment in the horizontal loading mechanism. During the impact of the loading heads, read the data of the vertical / horizontal high-precision sensor and the sensor 63 to be calibrated in the sensor fixture group 6 according to the impact distance. Finally, by comparing these two sets of data, determine whether the accuracy of the sensor 63 in the fixture group meets the design requirements.

[0040] The core function of the sensor fixture assembly 6 is twofold. First, relying on its own excellent precision characteristics (flatness, parallelism, and perpendicularity) and its cooperation with the positioning block 27, it provides a stable and standard installation environment for the sensor 63, ensuring that the sensor 63 is in a qualified state for calibration before calibration. Second, through cooperation with the vertical loading mechanism 3, the horizontal loading mechanism 4 (and supporting fixture loading head, long loading head mechanism, and other accessories), it realizes the loading test of the sensor 63, and then uses data comparison to complete the determination of the accuracy of the sensor 63, ultimately meeting the accuracy detection requirements during the calibration process of the sensor 63 and ensuring that the performance of the sensor 63 meets the design standards.

[0041] like Figure 8As shown, the distribution box 5 includes a control cabinet 51, an alarm light 52, control cabinet buttons 53, a control cabinet door 54, and support bases 55. The alarm light 52, control cabinet buttons 53, and control cabinet door 54 are mounted on the control cabinet 51, and multiple support bases 55 are mounted below the control cabinet 51. Inside the distribution box 5 are drivers for the push rod motors controlling the vertical loading mechanism 3 and the horizontal loading mechanism 4, a data acquisition box for collecting data from three high-precision sensors (vertical and horizontal), and a circuit control motherboard. The motherboard is connected to an industrial control computer and the various drivers and data acquisition boxes. The control method of the motherboard is that the industrial control computer controls the system through manual parameter input and software interaction. The industrial control computer is a relatively high-configuration desktop computer with a host, keyboard, monitor, and mouse.

[0042] Distribution box 5 is an integrated cabinet of electrical components for controlling the operation of equipment. Its core function is to safely and efficiently distribute the power from the external power grid to each execution unit of the equipment and realize the automation logic of the equipment through the control system.

[0043] like Figure 9 As shown, an equipment protective cover 7 also covers the outside of the main component 1. The equipment protective cover 7 includes a main frame 71, a protective plate 72, a protective window 73, a protective door 74, and base plates 75. The protective plate 72, protective window 73, and protective door 74 are installed on the main frame 71, and multiple base plates 75 are installed below the main frame 71. The protective plate 72 is above the protective window 73 and protective door 74, which are installed side by side on the main frame 71. The main body of the equipment protective cover 7 is constructed of aluminum profiles, and the perimeter is made of powder-coated carbon steel plates. The carbon steel plates are embedded in the aluminum profiles to protect the machinery, operators, and the surrounding environment.

[0044] Working process: Install the fixture base plate 61, support 62, sensor 63, and fixture cover plate 64 one by one to complete the assembly. At the same time, the sensor fixture assembly 6 needs to be adapted according to the different styles of sensor 63. Install the sensor fixture assembly 6 through the threaded holes on the large plate 26. Position the workpiece or sensor fixture assembly 6 against the positioning block 27. The operator manually turns the handwheel to drive the XY hand-cranked platform 21 to slide. The large plate 26 installed on it moves in the horizontal plane. The fixed blocks 22 on both sides limit the range of movement. The positioning iron 23 is placed between the large plate 26 and the fixed blocks 22. The length of the positioning iron 23 can determine the range of movement of the large plate 26. Stop the large plate 26 in the set position, tighten the set screw 24 on the set screw seat 25 to tighten the large plate 26, and cooperate with the equipment to carry out the first stage of testing.

[0045] The vertical loading mechanism 3 and the horizontal loading mechanism 4 contact the sensor fixture group 6 from the vertical and horizontal directions, respectively. When the electric push rod of the vertical loading mechanism 3 drives the vertical loading shaft 34, the vertical high-precision sensor 35, and the vertical loading head 36 to move sequentially, the vertical loading head 36 applies pressure to the workpiece under test. The vertical high-precision sensor 35 reads the specific information of the current loading force in real time and displays this information on the computer screen through the software system. At the same time, the workpiece under test also outputs loading force data. When the vertical electric push rod 43 receives the running signal, it generates driving force and drives the horizontal loading shaft 44 connected to it to move through the connection of the telescopic connecting seat 47. As the horizontal loading shaft 44 moves, the horizontal loading head 46 applies a horizontal load to the workpiece under test. During this process, the horizontal high-precision sensor 45 collects the specific information of the current loading force in real time and processes and feeds it back through the corresponding system.

[0046] If the vertical loading mechanism 3 requires a longer stroke to complete loading due to the low height of sensor 63, a matching clamp loading head can be inserted into the sensor fixture group 6. If the horizontal loading mechanism 4 has insufficient stroke due to the movement of sensor 63, the long loading head mechanism provided with the equipment should be replaced. During the impact process of the loading head, the data of the vertical high-precision sensor 35 and the horizontal high-precision sensor 45 are read from the sensor fixture group 6, respectively, along with the data of the sensor 63 to be calibrated. Finally, by comparing these two sets of data, it is determined whether the accuracy of sensor 63 in sensor fixture group 6 meets the design requirements.

[0047] Traditional calibration equipment requires manual loading of weights one by one, and data can only be collected when the weights are relatively stationary, which increases time and uncertainty. This new device only requires applying force to the device being calibrated, and by reading data from high-precision vertical / horizontal sensors and comparing the two, calibration is complete. It is simple, fast, and convenient, saving time and labor costs.

[0048] If the workpiece being tested or the sensor fixture group 6 requires a second stage of testing, the set screw 24 needs to be loosened, the positioning iron 23 needs to be removed, the X handwheel and Y handwheel of the XY hand crank platform 21 need to be rotated in the opposite direction, the large plate 26 needs to leave its original position until it is against the fixing block 22, and then the set screw 24 needs to be tightened to cooperate with the equipment for the second stage of testing.

[0049] Traditional calibration equipment requires fixtures for multi-dimensional force calibration, and these fixtures need to be repeatedly disassembled and replaced when calibrating different directions. Furthermore, each calibration requires waiting for the weights to come to a relative stop before data can be recorded. Disassembly and replacement can lead to offsets, inaccurate positioning, or the removal of pins—a cumbersome process that wastes time and manpower. This new device, however, clamps the weights in place in one step, then uses a high-precision XY hand-cranked platform and high-precision positioning blocks to determine the position, eliminating the need for prolonged waiting for the weights to come to a relative stop. Through the coordinated operation of these mechanisms, rapid calibration of single-dimensional and multi-dimensional force sensors 63 can be achieved.

[0050] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model.

Claims

1. A rapid sensor calibration device, characterized in that, include: The main component (1), and the platform mechanism (2), vertical loading mechanism (3), horizontal loading mechanism (4), power distribution box (5) and sensor fixture group (6) installed on the main component (1); The platform mechanism (2) and the sensor fixture group (6) are installed inside the main body component (1). The platform mechanism (2) positions the sensor fixture group (6). The vertical loading mechanism (3) and the horizontal loading mechanism (4) are installed on the main body component (1). The vertical loading mechanism (3) passes through the top of the main body component (1) and cooperates with the horizontal loading mechanism (4) to contact the sensor fixture group (6). The current loading force in the sensor fixture group (6) is collected in real time, and the sensor (63) installed in the sensor fixture group (6) is calibrated.

2. The sensor rapid calibration device according to claim 1, characterized in that, The platform mechanism (2) includes an XY hand-cranked platform (21), a fixing block (22), a positioning iron (23), a top screw (24), a top screw seat (25), a large plate (26), and a positioning block (27). Multiple fixing blocks (22) are provided on the adjacent sides of the XY hand-cranked platform (21). Each fixing block (22) is connected to the large plate (26) on the XY hand-cranked platform (21) via a positioning iron (23). On the other side of the XY hand-cranked platform (21) corresponding to the multiple fixing blocks (22), multiple set screw seats (25) are provided by set screws (24). The set screw seats (25) are used to press against the large plate (26) on the XY hand-cranked platform (21). Multiple threaded holes are provided on the large plate (26), and multiple positioning blocks (27) arranged at right angles are also installed on the large plate (26).

3. The sensor rapid calibration device according to claim 1, characterized in that, The main component (1) includes a base (11), columns (12), a top cover (13), a pad (14), and a base (15). Multiple columns (12) are inserted on the base (11), and the top of the multiple columns (12) presses against the top cover (13). An adjustable pad (14) is installed below the base (11), and a heightening base (15) is provided below the pad (14).

4. The sensor rapid calibration device according to claim 1, characterized in that, The vertical loading mechanism (3) includes a direct-push electric push rod (31), a telescopic fixed seat (32), a linear bearing (33), a vertical loading shaft (34), a vertical high-precision sensor (35), and a vertical loading head (36); Above the telescopic mounting base (32) is a direct-push electric actuator (31) composed of a servo motor and an electric actuator. Below the telescopic mounting base (32) is a linear bearing (33). Below the linear bearing (33) are a vertical high-precision sensor (35) and a vertical loading head (36). A vertical loading shaft (34) is fitted inside the linear bearing (33). The upper end of the vertical loading shaft (34) is connected to the push rod extending from the electric push rod, and the lower end of the vertical loading shaft (34) is connected to the vertical high-precision sensor (35).

5. The sensor rapid calibration device according to claim 1, characterized in that, The transverse loading mechanism (4) includes a middle frame (41), a guide hole (42), a locking cover plate (421), a vertical electric push rod (43), a transverse loading shaft (44), a transverse high-precision sensor (45), a transverse loading head (46), a telescopic connecting seat (47), and a round flange oil-free bushing (48). Multiple guide holes (42) are provided on the intermediate frame (41) for the column (12) to pass through. Each guide hole (42) is provided with an expansion sleeve and a locking cover plate (421) is provided above each guide hole (42). The expansion sleeve and the locking cover plate (421) lock the intermediate frame (41) onto the column (12). A vertical electric push rod (43) is installed between two adjacent guide holes (42). One end of each vertical electric push rod (43) passes through the intermediate frame (41) and is connected to one end of the transverse loading shaft (44). The other end of the transverse loading shaft (44) is sequentially equipped with a transverse high-precision sensor (45) and a transverse loading head (46). The transverse loading shaft (44) is located inside the intermediate frame (41).

6. The sensor rapid calibration device according to claim 5, characterized in that, A telescopic connecting seat (47) is installed at the connection between each vertical electric push rod (43) and the intermediate frame (41), and a round flange oil-free bushing (48) is installed between the intermediate frame (41) and the transverse high-precision sensor (45).

7. The sensor rapid calibration device according to claim 1, characterized in that, The sensor fixture assembly (6) includes a fixture base plate (61), a support member (62), a sensor (63), a fixture cover plate (64), and a limiting mechanism (65). The fixture base plate (61) is placed on the large plate (26) and close to the positioning block (27). A support member (62) for supporting the sensor (63) is installed on the fixture base plate (61). The sensor (63) is installed on the support member (62). The fixture cover plate (64) is installed on the sensor (63). A limiting mechanism (65) for limiting the fixture cover plate (64) is installed on one side of the fixture cover plate (64).

8. The sensor rapid calibration device according to claim 1, characterized in that, The distribution box (5) includes a control cabinet (51), an alarm light (52), a control cabinet button (53) and a control cabinet door (54) installed on the control cabinet (51), and multiple support bases (55) installed below the control cabinet (51).

9. The sensor rapid calibration device according to claim 1, characterized in that, It also includes an equipment protective cover (7) covering the main body component (1), the equipment protective cover (7) including a main frame (71), and a protective plate (72), a protective window (73) and a protective door (74) set on the main frame (71), and multiple feet (75) installed under the main frame (71).

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