Linear displacement sensor calibration device

Abstract

The utility model discloses a linear displacement sensor calibration device, which comprises a base, a guide rail and a grating ruler are arranged on the base along the length direction, and a stepping motor and a fixing seat are respectively arranged at two ends of the base. A displacement table is slidably arranged on the guide rail, a linear displacement sensor is arranged on the displacement table, a grating reading head is arranged at the position, corresponding to the grating ruler, of the bottom of the displacement table, and a pull wire of the linear displacement sensor is clamped on the fixing seat; the output end of the stepping motor is connected with a ball screw, the ball screw penetrates through the displacement table, and the ball screw is driven by the stepping motor to rotate so as to drive the displacement table to move horizontally. The calibration device for the linear displacement sensor has the advantages of simplicity in operation, small size, light weight, high automation degree and the like, and can be used for quickly and accurately measuring the linear displacement sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of measurement and calibration, specifically relates to a linear displacement sensor calibration device. BACKGROUND

[0002] The linear displacement sensor calibration device currently used has the problems of small range, large volume, large mass, low automation degree, high installation precision requirement and complex use. With the wide use of linear displacement sensors in various fields, the improvement of the performance of the calibration device is imminent, so the development of a high-precision, small-sized and highly automated displacement sensor calibration device is also the trend. SUMMARY

[0003] The utility model provides a linear displacement sensor calibration device, and aims at solving all or part of the above technical problems of the existing linear displacement sensor calibration device. The linear displacement sensor calibration device provided by the application has the advantages of simple operation, small volume, light weight and high automation degree, and can realize fast and accurate measurement of the linear displacement sensor.

[0004] The technical solution provided by the utility model is as follows:

[0005] A linear displacement sensor calibration device comprises a base, a guide rail and a grating ruler are arranged on the base along the length direction, and a stepping motor and a fixing seat are arranged at both ends of the base;

[0006] A displacement table is slidably arranged on the guide rail, a linear displacement sensor is arranged on the displacement table, a grating reading head is arranged on the bottom of the displacement table and corresponds to the position of the grating ruler, and the pull wire of the linear displacement sensor is clamped on the fixing seat, and the pull wire is parallel to the guide rail;

[0007] A ball screw is connected to the output end of the stepping motor, the ball screw passes through the displacement table, and the ball screw rotates under the driving of the stepping motor to drive the displacement table to move horizontally.

[0008] Further, a controller is further included.

[0009] The controller is electrically connected to the stepping motor.

[0010] Further, the guide rail is a double linear guide rail, and the ball screw is located in the middle of the double linear guide rail.

[0011] Further, an installation seat is arranged on the displacement table, and the linear displacement sensor is installed on the installation seat.

[0012] Further, a pay-off groove is arranged on the fixing seat and corresponds to the pull wire of the linear displacement sensor, and the pull wire is clamped in the pay-off groove.

[0013] Further, the step motor output end is provided with a shaft coupling, and the ball screw is connected with the shaft coupling.

[0014] Further, the grating reading head is connected with a display, and the display is used for outputting output data of the grating reading head.

[0015] The grating reading head is electrically connected with the controller.

[0016] Further, the controller is an STM32 single-chip microcomputer.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model discloses a linear displacement sensor calibration device, the device can be used for calibrating various linear displacement sensors, realizes 0.02% high accuracy characteristic through reasonable mechanism design, material selection and control system, realizes the automation, intelligentization of displacement calibration device through the application of motion controller new technology on displacement platform, reduces the volume and mass of linear displacement sensor calibration device through the improvement power device and the simplification installation etc. The linear displacement sensor calibration device has the advantages of simple operation, small, light, high degree of automation, can realize the quick, accurate measurement of linear displacement sensor. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structure schematic drawing of linear displacement sensor calibration device in the utility model embodiment.

[0020] The signs are as follows:

[0021] 1-ball screw, 2-mounting seat, 3-fixing seat, 4-grating ruler, 5-displacement table, 6-base, 7-guide rail, 8-step motor, 9-controller, 10-pull wire, 11-winding groove. DETAILED DESCRIPTION

[0022] To make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the following described embodiments are part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the detailed description of the embodiments of the application provided below in conjunction with the drawings is intended to represent only selected embodiments of the application and not limit the scope of the application claimed. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of the application.

[0024] It should be understood that in the description of the embodiments of the utility model, the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are merely for the convenience of describing the embodiments of the utility model and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the utility model, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0025] In the description of the embodiments of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0026] As Figure 1 As shown in the utility model provides a kind of line displacement sensor calibration device, including pedestal 6, pedestal 6 is provided with guide rail 7 and grating ruler 4 along length direction, pedestal 6 two ends are provided with stepper motor 8 and fixed seat 3 respectively. Considering the influence of temperature on the deformation of material and the vibration resistance of material, the pedestal 6 is made of aviation hard aluminum.

[0027] A displacement table 5 is slidably arranged on the guide rail 7, the displacement table 5 is provided with a linear displacement sensor, and a grating reading head (not shown in the figure) is arranged at the bottom of the displacement table 5 and corresponds to the position of the grating ruler 4. The pull wire 10 of the linear displacement sensor is clamped on the fixed seat 3, and the pull wire 10 is parallel to the guide rail 7.

[0028] The output end of the stepping motor 8 is connected with a ball screw 1, the ball screw 1 passes through the displacement table 5, and the ball screw 1 rotates under the driving of the stepping motor 8, so as to drive the displacement table 5 to move horizontally.

[0029] The linear displacement sensor mentioned in the embodiment is a linear displacement sensor meeting the requirements of JJF 1305-2011 linear displacement sensor calibration specification, and for example, a LXW-510 series linear displacement sensor can be selected.

[0030] Optionally, the linear displacement sensor calibration device further comprises a controller 9, and the controller 9 is electrically connected with the stepping motor 8.

[0031] The ball screw 1 is selected as a transmission screw of the linear displacement sensor calibration device in the application, the angular displacement amount output by the stepping motor 8 is converted into the linear displacement amount of the displacement table 5 through the transmission screw, and then the displacement amount of the displacement table is set through the controller, so that the linear displacement sensor is accurately and quickly measured.

[0032] Optionally, the guide rail 7 is a double linear guide rail 7, and the ball screw 1 is located in the middle of the double linear guide rail 7.

[0033] Optionally, the displacement table 5 is provided with a mounting seat 2, and the linear displacement sensor is mounted on the mounting seat 2.

[0034] Optionally, the fixed seat 3 is provided with a pay-off groove 11 corresponding to the pull wire 10 of the linear displacement sensor, and the pull wire 10 is clamped in the pay-off groove 11.

[0035] Optionally, the output end of the stepping motor 8 is provided with a shaft coupling (not shown in the figure), and the ball screw 1 is connected with the shaft coupling.

[0036] Optionally, the grating reading head is connected with a display, the display is used for outputting the output data of the grating reading head, and the grating reading head is electrically connected with the controller 9.

[0037] The grating ruler 2 is a steel belt type grating ruler, and the resolution can reach 0.1 mu m. The grating reading head matched with the grating ruler 4 is fixedly connected to the displacement table through a sensor measuring head clamp, and when the sensor measuring head clamp moves with the displacement table 5, the grating reading head also moves.

[0038] Optionally, the controller 9 is an STM32 single-chip microcomputer, and the STM32 single-chip microcomputer has the following functions:

[0039] 1. The stepper motor is driven by a high-multiple subdivision driver to drive the ball screw to rotate.

[0040] 2. The grating ruler reading head generates a digital signal during movement and is directly connected to the STM32 single-chip microcomputer, which is converted into a displacement digital signal through the encoder mode and related algorithms of the STM32 and displayed on the display.

[0041] 3. The STM32 single-chip microcomputer displays the displacement measured by the grating ruler in real time on the software interface of the display, achieving digital display.

[0042] The working principle of the linear displacement sensor calibration device provided in the application is that the measured displacement is first input on the controller, the stepper motor automatically outputs the corresponding angular displacement, the ball screw converts the angular displacement output by the stepper motor into the linear displacement of the displacement table, and the grating ruler measures and outputs the displacement of the displacement table.

[0043] The linear displacement sensor calibration device provided by the utility model can be used for calibrating various linear displacement sensors, realizes a high-precision characteristic of 0.02% through reasonable mechanism design, material selection and a control system, realizes automation and intelligence of the displacement calibration device through application of a motion controller new technology on the displacement table, and reduces the volume and mass of the linear displacement sensor calibration device through improvement of a power device and simplification of installation.

[0044] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, and any change or replacement within the technical scope disclosed in the application should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A linear displacement sensor calibration device, characterized in that: The base includes a guide rail and a grating ruler arranged along its length, and a stepper motor and a fixed base are respectively arranged at both ends of the base; A displacement stage is slidably mounted on the guide rail, a linear displacement sensor is mounted on the displacement stage, and a grating reading head is mounted at the bottom of the displacement stage corresponding to the position of the grating ruler. The pull wire of the linear displacement sensor is clamped on the fixed base, and the pull wire is parallel to the guide rail. The output end of the stepper motor is connected to a ball screw, which passes through the displacement table. The ball screw rotates under the drive of the stepper motor, thereby driving the displacement table to move horizontally. The guide rail is a double linear guide rail, and the ball screw is located in the middle of the double linear guide rail; The displacement sensor calibration device also includes a controller, which is electrically connected to the stepper motor and is used to set the displacement of the displacement stage; The controller is an STM32 microcontroller. It drives a stepper motor via a high-magnification microstepping driver, which in turn drives a ball screw to rotate. The ball screw, through the displacement stage, causes the grating reading head to slide on the double linear guide rails. The grating reading head directly inputs the digital signal generated during the movement into the STM32 microcontroller, where it is converted into a digital displacement signal. The accuracy of the linear displacement sensor is determined by comparing the set displacement of the displacement stage with the output digital displacement signal.

2. The linear displacement sensor calibration device according to claim 1, characterized in that: The displacement stage is provided with a mounting base, and the linear displacement sensor is mounted on the mounting base.

3. The linear displacement sensor calibration device according to claim 2, characterized in that: The mounting base is provided with a wire release groove corresponding to the pull wire of the linear displacement sensor, and the pull wire is locked in the wire release groove.

4. The linear displacement sensor calibration device according to claim 2, characterized in that: The stepper motor output end is provided with a coupling, and the ball screw is connected to the coupling.

5. The linear displacement sensor calibration device according to claim 1, characterized in that: The grating reading head is connected to a display, and the display is used to output the output data of the grating reading head; The grating reading head is electrically connected to the controller.

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