Multi-dimensional displacement synchronous calibration device and calibration method based on Internet of Things technology

Abstract

The invention relates to a multi-dimensional displacement synchronous calibration device and calibration method based on the Internet of Things technology, the device comprises a mobile platform unit, a mobile control unit and an intelligent terminal, the mobile platform unit is detachably superposed in the height direction to realize superposition of displacement dimensions, and the intelligent terminal is used for collecting data; when one mobile platform unit is adopted, X-direction one-dimensional calibration is carried out; when the two overlapped mobile platform units are adopted, two-dimensional calibration in the X direction and the Y direction is carried out; when the three overlapped mobile platform units are adopted, three-dimensional calibration in the X direction, the Y direction and the Z direction is carried out; and each mobile platform unit is connected and controlled by an independent mobile control unit to move. The device has the advantages that high-precision automatic displacement calibration of the sensor can be realized, and synchronous calibration in two-dimensional and three-dimensional deformation directions can be realized through combination in different directions.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor displacement calibration, and in particular to a multi-dimensional displacement synchronous calibration device and a calibration method based on Internet of Things technology. Background Art

[0002] The measurement accuracy of the sensor can generally be obtained through comparative measurement. The traditional displacement measurement method is to install the sensor on a device with a high-precision vernier caliper, manually adjust the displacement direction of the vernier caliper to keep consistent with the displacement change direction of the sensor, add displacement by manually rotating the spiral micrometer, and then measure the displacement of the sensor to verify its measurement accuracy. However, in the face of long-distance and complex application scenarios, the traditional calibration method requires continuous manual adjustment to determine the calibration amount, which is relatively inefficient; at the same time, the existing device can only achieve calibration in a certain direction through manual control, and cannot meet the high-precision calibration requirements of sensors with multi-dimensional synchronous deformation in certain complex scenarios. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-dimensional displacement synchronous calibration device and calibration method based on the Internet of Things technology in view of the shortcomings of the above-mentioned prior art, so as to realize remote electric control, and realize synchronous calibration of two- and three-dimensional deformation directions through a combination of different directions, and realize synchronous calibration of multiple dimensional deformations of the sensor.

[0004] The purpose of the present invention is achieved by the following technical solutions: A multi-dimensional displacement synchronous calibration device based on Internet of Things technology, characterized in that: the device comprises a mobile platform unit, a mobile control unit and an intelligent terminal, the mobile platform unit is detachably stacked in the height direction to realize the superposition of displacement dimensions, and the intelligent terminal is used to collect data; When one of the mobile platform units is used, one-dimensional calibration in the X direction is performed; When two overlapping mobile platform units are used, two-dimensional calibration in the X and Y directions is performed; When three stacked mobile platform units are used, three-dimensional calibration is performed in the X, Y and Z directions; Each of the mobile platform units is connected by an independent mobile control unit to control its displacement.

[0005] The mobile platform unit includes a slide and a base, the slide is arranged on the base and a sliding fit is formed between the slide and the base, a limiting device is arranged between the slide and the base, the displacement of the slide on the base is connected and controlled by the mobile control unit, and a sensor clamp connection hole for connecting a sensor and a platform connection hole for connecting the stacked mobile platform units are provided on the slide.

[0006] The mobile control unit includes a motor seat, a motor, a support platform and a lead screw. The motor is installed on the motor seat. One end of the lead screw is in transmission cooperation with the motor, and the other end is supported on the slide. The support platform is connected to support the lead screw.

[0007] The limiting device comprises a limiting nut and a limiting gasket, wherein the limiting gasket is arranged on the base, the limiting nut is arranged on the slide, and the limiting nut is clamped in the limiting groove of the limiting gasket.

[0008] The base and the slide table are respectively provided with slide rails, and the slide rails of the two slide rails are provided with balls to form a sliding fit.

[0009] A spring is arranged between the base and the slide, one end of the spring is fixed on the base, and the other end of the spring is fixed on the slide.

[0010] When performing two-dimensional displacement calibration, the two mobile platform units are stacked vertically in a cross plane. The upper mobile platform unit has a slide extension plate, which is fixed on the slide of the lower mobile platform unit. The slide extension plate and the slide form a whole and form a sliding fit with the base.

[0011] When performing three-dimensional displacement calibration, the mobile platform unit is vertically stacked on a two-dimensional platform surface. The mobile platform unit located at the top has a top rod and a top block. The slide of the mobile platform unit located at the top and the base are lifted and lowered vertically with respect to the bottom slide through the cooperation of the top rod and the top block.

[0012] The intelligent terminal includes a power module, a control module, an acquisition module, a communication module and a display module, wherein the power module is used for power supply, the control module is connected to control the mobile control unit, the acquisition module is used for acquiring travel data of the sensor and the displacement platform and sending it to the display module and the communication module, the communication module is used for receiving instruction information from the cloud platform and uploading the acquired data to the cloud platform, and the display module is used for displaying the received sensor displacement data and displacement platform travel data on the display screen in real time.

[0013] A calibration method for the multi-dimensional displacement synchronous calibration device based on the Internet of Things technology is characterized in that the calibration method comprises the following steps: The intelligent terminal control module identifies the currently connected motors, sends the number of motors to the communication module and uploads it to the cloud platform. The cloud platform determines the dimensions of the multi-dimensional displacement calibration platform based on the number of motors and jumps to the corresponding configuration page. After inputting the target displacement parameters in each dimension on the configuration page of the cloud platform, the motion command containing the corresponding displacement parameters in each dimension is sent to the smart terminal; After receiving the command from the cloud platform, the communication module of the intelligent terminal synchronizes the corresponding displacement parameters of each dimension to the control module, and the control module controls the corresponding motor to move according to the given displacement parameters and stops moving after reaching the target position; Repeat the above process until the calibration task is completed, click the reset button on the cloud platform, the cloud platform sends a reset command, the smart terminal communication module receives the reset command and sends it to the control module, and the control module controls all motors to return to their initial positions.

[0014] The advantages of the present invention are: 1) The motor is used to control the stroke. Since the motor is positioned by pulses, the speed is controllable and the position accuracy is accurate; 2) The calibration task is completed by remotely controlling the displacement calibration platform through the cloud platform, which has the advantage of remotely controlling the displacement calibration platform for calibration in complex and harsh outdoor environments; 3) Multiple displacement calibration platforms can be combined in different directions to form a multi-dimensional displacement calibration platform device. Each dimensional direction corresponds to a motor that controls the stroke, and the operation and control of each motor are relatively independent and do not interfere with each other; 4) The multi-dimensional displacement calibration platform has the functions of multi-dimensional synchronous control and multi-dimensional synchronous verification; 5) The power module of the device comes with a battery and supports AC and solar charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the one-dimensional displacement calibration platform in the present invention; Figure 2 A schematic diagram of the internal relationship structure of the intelligent terminal in the present invention; Figure 3 It is a structural schematic diagram of the two-dimensional displacement calibration platform in the present invention; Figure 4 It is a structural schematic diagram of the three-dimensional displacement calibration platform in the present invention. DETAILED DESCRIPTION

[0016] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art: like Figures 1 to 4As shown, the marks 1-40 in the figure respectively represent: slide 1, base 2, limit nut 3, limit gasket 4, limit slot 5, screw fixing hole 6, slide rail 7, slide rail 8, spring 9, motor seat wheel 10, motor seat 11, motor 12, support platform 13, screw 14, platform connecting hole 15, sensor fixture connecting hole 16, support platform 17, motor 18, motor seat 19, slide extension plate 20, slide base 21, slide extension plate 22, motor seat wheel 23, motor seat 24, motor 25, support platform 26, screw 27, push rod 28, slide 29, push block 30, spring 31, slide rail 32, slide rail 33, limit nut 34, limit gasket 35, limit slot 36, screw fixing hole 37, base 38, platform connecting hole 39, sensor fixture connecting hole 40.

[0017] Embodiment 1: Figure 1 and Figure 2 As shown, the multi-dimensional displacement synchronous calibration device based on Internet of Things technology in this embodiment can realize one-dimensional calibration of the sensor.

[0018] The one-dimensional displacement calibration platform device of this embodiment includes three parts: a mobile platform unit, a mobile control unit, and an intelligent terminal. The mobile platform unit can be installed with a sensor that needs to be calibrated and specifically perform displacement actions. The mobile control unit is connected to the mobile platform unit for controlling its movement. The intelligent terminal realizes remote electronic control and corresponding data collection and transmission based on the Internet of Things technology.

[0019] Specifically, the specific structures of the mobile platform unit and the mobile control unit are as follows: Figure 1 shown.

[0020] The mobile platform unit is composed of a slide 1, a base 2, a slide rail 7 on the slide, a slide rail 8 on the base, a spring 9, a limiting nut 3, and a limiting gasket 4.

[0021] The mobile control unit is composed of a motor base 11 , a motor 12 , a support platform 13 , and a lead screw 14 .

[0022] The base 2 is fastened to the ground by screws to ensure that the structure of the whole device is stable and firm. A slide 1 is placed above the base 2. The base 2 and the slide 1 are connected and limited by a limit nut 3 and a limit washer 4. The screw fixing hole 6 on the limit washer 4 is fixed to the side of the base 2 by screws, and the limit nut 3 passes through the limit groove 5 on the limit washer 4 and is screwed to the side of the slide 1, so that the slide 1 and the base 2 can only move in the direction of the slide rail, and the limit groove 5 on the limit washer 4 ensures that the slide 1 does not move beyond the stroke.

[0023] In this embodiment, the slide 1 has a plane size of 60*60mm and a stroke of 15mm. There is a sensor fixture connection hole 16 at the center of its upper surface, which is used to connect the sensor fixture so that the sensor remains fixed relative to the slide 1. There are platform connection holes 15 around the upper surface of the slide 1, which are connected by screws to combine platforms moving in different directions into a multi-dimensional displacement calibration platform.

[0024] In this embodiment, the material of the mobile platform unit is preferably aluminum alloy, the slide 1 and the base 2 are square in planar shape with a side length range of 50-300mm, and the movable stroke is determined by the length of the limit groove 5 on the limit gasket 4, and the stroke range is ±5-30mm.

[0025] There are two slide rails between the base 2 and the slide 1, wherein each slide rail is divided into two track blocks, one track block is the slide rail 8 on the base 2 fixed to the base 2 by screws, and the other track block is the slide rail 7 on the slide 1 fixed to the slide 1 by screws, and balls are placed between the fitting surfaces of the slide rail 7 on the slide 1 and the slide rail 8 on the base 2 to achieve a sliding fit between the slide 1 and the base 2.

[0026] A spring 9 is also connected between the base 2 and the slide 1, one end of the spring 9 is fixed to the base 2 by a screw, and the other end is fixed to the slide 1 by a screw. When the motor 12 moves the lead screw 14 to the zeroing position, the spring 9 restores the slide 1 to the initial position.

[0027] The support platform 13 is fixed to the ground by screws, and the support platform 13 and the lead screw 14 are connected by high-precision threads to ensure the movement accuracy of the slide 1.

[0028] One end of the lead screw 14 is connected to the motor 12 and forms a transmission match, and the other end is supported on the slide 1. The motor 12 is placed on the motor seat 11, and the motor seat 11 has wheels 10 for movement.

[0029] The motor 12 drives the lead screw 14 to rotate, and the support platform 13 remains stationary due to being fixed on the ground. The lead screw 14 moves forward and pushes the slide 1 forward. At the same time, the lead screw 14 also moves forward with the motor 12.

[0030] In this embodiment, the lead screw 14 and the support platform 13 are connected by high-precision threads to ensure that the lead screw advances 0.5 mm per rotation.

[0031] There is a reduction gear inside the motor 12 to reduce the rotation speed and improve the accuracy. The motor shaft is connected to the screw 14 which accurately controls the stroke. The screw 14 spirals forward on the support platform 13 to push the slide 1 forward, so that the stroke of the displacement calibration platform can be controlled by controlling the rotation of the motor shaft, so that its stroke accuracy reaches 0.01mm.

[0032] like Figure 2 As shown, the components of the intelligent terminal include a power module, a control module, a collection module, a communication module and a display module.

[0033] The power module includes a power input interface, a battery, and a power output interface. The power input interface is connected to the mains and solar energy for charging. The power output interface supplies power to the control module, acquisition module, communication module, display module, and motor.

[0034] The control module parses the command received by the communication module and controls the motor 12 to rotate according to the content of the command.

[0035] The acquisition module collects the sensor data that needs to be calibrated and the travel data of the displacement platform and sends them to the display module and the communication module.

[0036] The display module displays the received sensor displacement data and the travel data of the displacement platform on the display screen in real time.

[0037] The communication module is connected to the cloud platform, on the one hand receiving command information from the cloud platform, and on the other hand uploading collected data to the cloud platform.

[0038] The cloud platform draws charts, displays calibration status, and analyzes calibration errors based on the data uploaded by the smart terminal.

[0039] The specific steps of the calibration method of this embodiment are as follows: S1: Determine the assembly of the one-dimensional displacement calibration platform according to the front and rear displacement direction of the sensor to be calibrated. Figure 1 shown.

[0040] S2: Install the sensor on the one-dimensional displacement calibration platform.

[0041] The base 2 of the one-dimensional displacement calibration platform is fixed to the ground with screws to ensure the smooth operation of the one-dimensional displacement calibration platform during the calibration process. The sensor is installed on the fixture, and the fixture is connected to the sensor fixture connection hole 16 on the top slide 1 of the one-dimensional displacement calibration platform through threads.

[0042] S3: Power on test and perform zero calibration.

[0043] S4: Input the target displacement parameters in the front and rear directions on the cloud platform.

[0044] S5: The intelligent terminal communication module receives the instruction from the cloud platform, and the control module controls the motor 12 to drive the lead screw 14 to push the slide 1 to move according to the instruction, and the acquisition module simultaneously acquires the displacement data of the sensor.

[0045] S6: Display the data in real time on the display module of the smart terminal and the page of the cloud platform.

[0046] S7: Repeat the above steps to complete the final calibration.

[0047] Embodiment 2: Figure 3 As shown, the difference between this embodiment and the first embodiment is that the multi-dimensional displacement synchronous calibration device in this embodiment is composed of two one-dimensional displacement calibration platform devices in different directions, which can realize two-dimensional calibration of the sensor.

[0048] like Figure 3 As shown, this embodiment is an upgrade of the first embodiment, that is, two one-dimensional displacement calibration platform devices are stacked in the height direction and appropriately improved. Most of the parts in this embodiment are exactly the same as those in the first embodiment, and the different parts are: a slide extension plate 20 and a slide base 21.

[0049] The slide base 21 is both a slide of a displacement calibration platform located at a lower layer and moving in the front-to-back direction, and a base of a displacement calibration platform located at an upper layer and moving in the left-to-right direction.

[0050] The slide extension plate 20 is fixed to the slide base 21 by screws. When the slide base 21 moves as a slide, the slide extension plate 20 also moves together.

[0051] The support platform 17 , the motor 18 and the motor seat 19 are placed above the slide extension plate 20 .

[0052] The support platform 17 is fixed on the slide extension plate 20 by screws, and the slide extension plate 20 is fixed on the slide base 21 by screws. The slide base 21 serves as the base of the displacement calibration platform that moves in the left and right directions. The slide base 21, the support platform 17 and the slide extension plate 20 remain stationary as a whole.

[0053] The specific steps of the calibration method of this embodiment are as follows: S1: Determine the assembly of the two-dimensional displacement calibration platform according to the front-to-back and left-to-right displacement directions that the sensor needs to calibrate. Figure 3 shown.

[0054] The slide 1 in the first embodiment is connected to the base of the same embodiment (the base 2 in the first embodiment) by screws. Pay attention to adjusting the connection direction so that the moving directions of the respective slides remain different, thereby forming a two-dimensional displacement calibration platform device.

[0055] The slide base 21 can be formed by fastening the slide 1 in the first embodiment and the base in another identical embodiment (the base 2 in the first embodiment) with screws, or the slide base 21 in the second embodiment is a two-in-one structure of the slide and the base.

[0056] The slide extension plate 20 and the base in the slide base 21 are fixed using screws.

[0057] S2: Install the sensor on the two-dimensional displacement calibration platform.

[0058] The base of the two-dimensional displacement calibration platform is fixed to the ground with screws to ensure the smooth operation of the two-dimensional displacement calibration platform during the calibration process. The sensor is installed on the fixture, and the fixture is connected to the sensor fixture connection hole on the top slide of the two-dimensional displacement calibration platform through threads.

[0059] S3: Power on test and perform zero calibration.

[0060] S4: Input the target displacement parameters in the front-to-back and left-to-right directions on the cloud platform.

[0061] S5: The intelligent terminal communication module receives the command from the cloud platform, and the control module controls the two motors to start moving at the same time according to the command. The bottom motor pushes the slide base 21 forward and backward on the ground, and the motor 18 pushes the top slide to move left and right. The motor 18 and the motor seat 19 move left and right on the slide extension plate 20, and the acquisition module simultaneously collects the displacement data of the sensor in two directions.

[0062] S6: Display the data in real time on the display module of the smart terminal and the page of the cloud platform.

[0063] S7: Repeat the above steps to complete the final calibration.

[0064] Embodiment 3: This embodiment is a further upgrade of Embodiment 2, that is, three one-dimensional displacement calibration platform devices are stacked in the height direction and appropriately improved. This embodiment adds a displacement calibration platform that moves in the up-down direction on the basis of Embodiment 2. The difference between the displacement calibration platform that moves in the up-down direction newly added in Embodiment 3 and the displacement calibration platforms in other directions lies in the structure of the top rod 28 and the top block 30.

[0065] The other structures of the third embodiment are completely consistent with those of the first embodiment.

[0066] The base 38 is fixed to the slide at the top of the second embodiment by screws, and the slide extension plate 23 is fixed to the base 38 by screws, so that the slide at the top of the second embodiment, the base 38 and the slide extension plate 24 keep moving synchronously.

[0067] One end of the push rod 28 is pressed against the lead screw 27, and the other end of the push rod 28 is pressed against the top block 30, which is fixed to the slide 29 by screws. There is an axis fixed on the base 38 at the right angle to the center of the push rod 28, so when the push rod 28 is pushed, the push rod 28 will rotate around the axis at the right angle to the center.

[0068] The motor 25 rotates to drive the lead screw 27 to move forward, and the support platform 26 remains stationary. The forward movement of the lead screw 27 will push the push rod 28 to rotate, and the other end of the push rod 28 pushes the top block 30 and the slide 29 to move upward.

[0069] The slide rail 32 on the base, the slide rail 33 on the slide, the limit nut 34, the limit gasket 35, the limit groove 36, and the screw fixing hole 37 together enable the slide to move only in the up and down directions of the base, and its structure and connection relationship are completely consistent with the embodiment 1.

[0070] When the motor 25 moves to the home position, the spring 31 causes the slide 29 to also move to the home position.

[0071] There are platform connection holes 39 around the upper surface of the slide 29, which are used to connect the mobile platform units in different directions into a multi-dimensional displacement calibration platform through screw connection. There is a sensor fixture connection hole 40 at the center of the upper surface of the slide 29, which is used to connect the sensor fixture so that the sensor remains fixed relative to the slide.

[0072] In this embodiment, the three-dimensional displacement calibration platform is composed of a plurality of displacement calibration platforms in different directions. Each dimensional direction corresponds to a motor for controlling the stroke, and the operation and control of each motor are relatively independent and do not interfere with each other.

[0073] The multi-dimensional displacement calibration platform has the functions of multi-dimensional synchronous control and multi-dimensional synchronous verification. Multi-dimensional synchronous control means that the multi-dimensional displacement calibration platform can simultaneously complete the synchronous calibration of different strokes in the three directions of X, Y, and Z. Multi-dimensional synchronous verification means that data in different directions can be collected, compared, and displayed in real time.

[0074] The contents of multi-dimensional synchronous verification are as follows: The displacement s1 of the slide table driven by the lead screw driven by the motor in a certain dimension = the target displacement parameter s0 filled in the cloud platform in this dimension; The displacement data s2 collected by the sensor in this dimension = the target displacement parameter s0 filled in by the cloud platform in this dimension; The specific process is: The sensor displacement data s2 is collected from the sensor by the acquisition module and sent to the communication module before being uploaded to the cloud platform; the motor controls the lead screw to make the slide displacement data s1 sent by the control module to the communication module and uploaded to the cloud platform. The cloud platform calculates the slide displacement s1 based on the number of motor rotations and the transmission ratio formula. At the same time, the calculated slide displacement s1 is compared and verified with the target displacement s0 input by the platform at the beginning. After the secondary comparison verification is passed, check whether the target displacement s0 input by the platform and the displacement s2 collected by the sensor are equal.

[0075] The target displacement parameter s0 filled in a certain dimension of the cloud platform, the displacement s1 of the slide table driven by the motor in this dimension, and the displacement data s2 collected by the sensor in this dimension are all displayed in real time on the display module of the intelligent terminal; at the same time, the above three data will also be displayed in real time on the comparison page of the cloud platform, with both a table showing the historical calibration data and a curve chart to intuitively display the calibration process, which is helpful to further analyze the accuracy of the sensor.

[0076] The specific steps of the calibration method of this embodiment are as follows: S1: Determine the assembly of the three-dimensional displacement calibration platform according to the front-to-back, left-to-right, and up-and-down displacement directions that the sensor needs to calibrate. Figure 4 shown.

[0077] First, the slide 1 in Example 1 is connected to the base of the same embodiment (base 2 in Example 1) by screws to form a two-dimensional displacement calibration platform device. Then, the platform connection hole on the top slide of the two-dimensional displacement calibration platform device is connected to the base of the one-dimensional displacement calibration platform in the up and down displacement directions by screws to form a three-dimensional displacement calibration platform device.

[0078] The up and down displacement direction calibration platform uses the motor 25 to drive the lead screw 27 forward, and the lead screw 27 pushes the lower end of the push rod 28 to rotate upward, and the upper end of the push rod 28 pushes the top block 30 to move upward. The top block 30 is fixed on the slide 29, so the slide starts to move upward.

[0079] S2: Install the sensor on the three-dimensional displacement calibration platform.

[0080] The base of the three-dimensional displacement calibration platform is fixed to the ground with screws to ensure the smooth operation of the three-dimensional displacement calibration platform during the calibration process. The sensor is installed on the fixture, and the fixture is connected to the sensor fixture connection hole 40 on the top slide 29 of the three-dimensional displacement calibration platform through threads.

[0081] S3: Power on test and perform zero calibration.

[0082] S4: Input the target displacement parameters in the front-to-back, left-to-right, and up-down directions on the cloud platform.

[0083] S5: The intelligent terminal communication module receives the command from the cloud platform, and the control module controls the three motors to start moving at the same time according to the command. The bottom motor pushes the slide forward and backward on the ground; the middle motor pushes the middle slide to move left and right, and the middle motor and the motor seat move left and right on the middle slide extension plate; the motor 25 drives the lead screw 27 forward and pushes the push rod 28 to make the top block 30 and the slide 29 move upward, and the motor 25 and the motor seat 24 move forward and backward on the slide extension plate 22; the acquisition module simultaneously acquires the displacement data of the sensor in three directions.

[0084] S6: Display the data in real time on the display module of the smart terminal and the page of the cloud platform.

[0085] S7: Repeat the above steps to complete the final calibration.

[0086] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and changes can still be made to the present invention without departing from the scope of the claims, so they are not described one by one here.

Claims

1. A multi-dimensional displacement synchronous calibration device based on Internet of Things technology, characterized in that: The device comprises a mobile platform unit, a mobile control unit and an intelligent terminal. The mobile platform unit is detachably stacked in the height direction to realize the superposition of displacement dimensions. The intelligent terminal is used to collect data. When one of the mobile platform units is used, one-dimensional calibration in the X direction is performed; When two overlapping mobile platform units are used, two-dimensional calibration in the X and Y directions is performed; When three stacked mobile platform units are used, three-dimensional calibration is performed in the X, Y and Z directions; Each of the mobile platform units is connected by an independent mobile control unit to control its displacement.

2. According to claim 1, a multi-dimensional displacement synchronous calibration device based on Internet of Things technology is characterized by: The mobile platform unit includes a slide and a base, the slide is arranged on the base and a sliding fit is formed between the slide and the base, a limiting device is arranged between the slide and the base, the displacement of the slide on the base is connected and controlled by the mobile control unit, and a sensor clamp connection hole for connecting a sensor and a platform connection hole for connecting the stacked mobile platform units are provided on the slide.

3. The multi-dimensional displacement synchronous calibration device based on Internet of Things technology according to claim 2 is characterized in that: The mobile control unit includes a motor seat, a motor, a support platform and a lead screw. The motor is installed on the motor seat. One end of the lead screw is in transmission cooperation with the motor, and the other end is supported on the slide. The support platform is connected to support the lead screw.

4. The multi-dimensional displacement synchronous calibration device based on Internet of Things technology according to claim 2 is characterized in that: The limiting device comprises a limiting nut and a limiting gasket, wherein the limiting gasket is arranged on the base, the limiting nut is arranged on the slide, and the limiting nut is clamped in the limiting groove of the limiting gasket.

5. The multi-dimensional displacement synchronous calibration device based on Internet of Things technology according to claim 2 is characterized in that: The base and the slide table are respectively provided with slide rails, and the slide rails of the two slide rails are provided with balls to form a sliding fit.

6. The multi-dimensional displacement synchronous calibration device based on Internet of Things technology according to claim 2 is characterized in that: A spring is arranged between the base and the slide, one end of the spring is fixed on the base, and the other end of the spring is fixed on the slide.

7. The multi-dimensional displacement synchronous calibration device based on Internet of Things technology according to claim 1 is characterized in that: When performing two-dimensional displacement calibration, the two mobile platform units are stacked vertically in a cross plane. The upper mobile platform unit has a slide extension plate, which is fixed on the slide of the lower mobile platform unit. The slide extension plate and the slide form a whole and form a sliding fit with the base.

8. The multi-dimensional displacement synchronous calibration device based on Internet of Things technology according to claim 1 is characterized in that: When performing three-dimensional displacement calibration, the mobile platform unit is vertically stacked on a two-dimensional platform surface. The mobile platform unit located at the top has a top rod and a top block. The slide of the mobile platform unit located at the top and the base are lifted and lowered vertically with respect to the bottom slide through the cooperation of the top rod and the top block.

9. The multi-dimensional displacement synchronous calibration device based on Internet of Things technology according to claim 1, characterized in that: The intelligent terminal includes a power module, a control module, an acquisition module, a communication module and a display module, wherein the power module is used for power supply, the control module is connected to control the mobile control unit, the acquisition module is used for acquiring travel data of the sensor and the displacement platform and sending it to the display module and the communication module, the communication module is used for receiving instruction information from the cloud platform and uploading the acquired data to the cloud platform, and the display module is used for displaying the received sensor displacement data and displacement platform travel data on the display screen in real time.

10. A calibration method for the multi-dimensional displacement synchronous calibration device based on Internet of Things technology according to any one of claims 1 to 9, characterized in that: The calibration method comprises the following steps: The intelligent terminal control module identifies the currently connected motors, sends the number of motors to the communication module and uploads it to the cloud platform. The cloud platform determines the dimensions of the multi-dimensional displacement calibration platform based on the number of motors and jumps to the corresponding configuration page. After inputting the target displacement parameters in each dimension on the configuration page of the cloud platform, the motion command containing the corresponding displacement parameters in each dimension is sent to the smart terminal; After receiving the command from the cloud platform, the communication module of the intelligent terminal synchronizes the corresponding displacement parameters of each dimension to the control module, and the control module controls the corresponding motor to move according to the given displacement parameters and stops moving after reaching the target position; Repeat the above process until the calibration task is completed, click the reset button on the cloud platform, the cloud platform sends a reset command, the smart terminal communication module receives the reset command and sends it to the control module, and the control module controls all motors to return to their initial positions.

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