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CN-224230924-U - Closed-loop force control size measuring mechanism

CN224230924UCN 224230924 UCN224230924 UCN 224230924UCN-224230924-U

Abstract

The utility model discloses a closed-loop force control size measurement mechanism which comprises a force sensor, a linear motor, a first displacement sensor, a controller and a controller, wherein one end of the force sensor is a fixed end, the other end of the force sensor is an induction end, the linear motor comprises a stator and a rotor which can move relatively, the stator is connected with the induction end of the force sensor, the rotor is connected with a measurement head, the first displacement sensor is used for acquiring the moving distance of the rotor or the measurement head, and the force sensor, the linear motor and the first displacement sensor are all electrically connected with the controller. The utility model can find out abnormality in time, reduce error and ensure measurement accuracy.

Inventors

  • LIN SHUYU
  • Zhou Diefu
  • CHEN QIPEI

Assignees

  • 广州翔天智能科技有限公司

Dates

Publication Date
20260512
Application Date
20250717

Claims (8)

  1. 1. A closed loop force control sizing mechanism, comprising: the device comprises a force sensor (1), wherein one end of the force sensor (1) is a fixed end, and the other end of the force sensor (1) is an induction end; The linear motor comprises a stator (2) and a rotor (3) which can move relatively, wherein the stator (2) is connected with the induction end of the force sensor (1), and the rotor (3) is connected with a measuring head (4); A first displacement sensor (5) for acquiring a moving distance of the mover (3) or the measuring head (4); and the force sensor (1), the linear motor and the first displacement sensor (5) are electrically connected with the controller.
  2. 2. The closed loop force control dimension measuring mechanism of claim 1, further comprising a second displacement sensor for obtaining a distance of movement of the stator (2) or the sensing end of the force sensor (1), the second displacement sensor being electrically connected to a controller.
  3. 3. The closed loop force control size measuring mechanism according to claim 1 or 2, further comprising a housing (6), wherein one end of the force sensor (1) away from the linear motor is fixedly connected with the housing (6), the linear motor is movably arranged in the housing (6), a measuring port is formed in one end of the housing (6) away from the force sensor (1), and one end of the measuring head (4) away from the linear motor extends out of the housing (6) through the measuring port.
  4. 4. A closed loop force control dimension measuring mechanism according to claim 3, wherein a guide rail (7) is arranged in the housing (6), and the measuring head (4) is in sliding fit with the housing (6) through the guide rail (7).
  5. 5. The closed loop force control size measuring mechanism according to claim 4, wherein the guide rail (7) comprises a fixed rail and a movable rail, wherein the fixed rail is fixedly connected with the machine shell (6), the movable rail is fixedly connected with the measuring head (4), the fixed rail is in sliding fit with the movable rail, and the length directions of the fixed rail and the movable rail are parallel to the moving direction of the measuring head (4).
  6. 6. A closed loop force control dimension measuring mechanism according to claim 3, wherein an end of said measuring head (4) remote from the linear motor is connected with an end plate (8), the area of said end plate (8) being larger than the area of said measuring port.
  7. 7. The closed-loop force-controlled dimension measuring mechanism according to claim 6, wherein the side of the end plate (8) remote from the linear motor is perpendicular to the direction of movement of the measuring head (4).
  8. 8. Closed loop force controlled dimension measuring mechanism according to claim 1 or 2, characterized in that the first displacement sensor (5) and the second displacement sensor are both grating scales.

Description

Closed-loop force control size measuring mechanism Technical Field The utility model relates to the technical field of electromechanical integration and sensing measurement, in particular to a closed-loop force control size measuring mechanism. Background In the case of soft workpiece size measurement, the workpiece is flattened by force, resulting in different measured workpiece sizes under different forces, so that the measurement pressure needs to be controlled to obtain the workpiece size under a certain pressure when measuring the soft workpiece size. The Chinese patent of invention with the application number of CN201610066597.9 is the prior application of the applicant, and discloses a dimension measuring device with controllable force and a using method thereof, wherein the dimension measuring device inputs data of measuring force F to a controller, the controller controls a driver to output a corresponding current value, a direct-drive motor receives the current value and then drives a moving body to do linear motion, the movement of the moving body drives the measuring head to move, and finally the measuring head is pressed on the placing plane of the measured object with the measuring force F, the displacement sensor transmits the acquired position data of the measuring ruler to the controller through the driver, and the size value is obtained after the processing of the controller. The application adopts an open-loop type force control mode, and has the advantages of simple structure and high speed. However, when the application is measured, data of the measuring force F are input to the controller, the controller controls the driver to output a corresponding current value, the direct-drive motor drives the moving body to do linear motion after receiving the current value, the motion of the moving body drives the measuring head to move, finally the measuring head presses the measured object with the measuring force F, in the process, the current does work and is converted into power of the measuring head, the conversion rate is easily influenced by multiple factors such as inductance, frequency and voltage, and finally the measuring force F applied to the measured object and the measuring precision are influenced. In addition, the force is required to be accurately measured, and meanwhile, certain requirements are also required for mechanical precision, and particularly, close matching between the sliding block and the guide rail and between the stator and the rotor of the direct-drive motor are required. In this case, a certain friction and other resistance exists between the slide block and the guide rail and between the stator and the rotor, which brings difficulty to force control. Under ideal conditions, the resistance should remain unchanged, but in the actual measurement process, the resistance is likely to change due to factors such as abrasion, dust and the like, and the dimension measuring device with controllable force is difficult to find out abnormal resistance in time, so that dimension errors are caused, and the measurement accuracy is affected. For this reason, it is necessary to develop a closed-loop force-controlled dimension measuring mechanism to overcome the shortcomings in the current practical application. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a closed-loop force control size measuring mechanism which can discover abnormality in time, reduce errors and ensure measuring precision. The technical scheme of the utility model is realized as follows: a closed loop force controlled dimensional measurement mechanism comprising: The force sensor is used to detect the presence of a force, one end of the force sensor is a fixed end, and the other end of the force sensor is an induction end; The linear motor comprises a stator and a rotor which can move relatively, wherein the stator is connected with the induction end of the force sensor, and the rotor is connected with a measuring head; The first displacement sensor is used for acquiring the moving distance of the mover or the measuring head; And the force sensor, the linear motor and the first displacement sensor are electrically connected with the controller. As a preferred embodiment, the device further comprises a second displacement sensor for acquiring a moving distance of the stator or the sensing end of the force sensor, wherein the second displacement sensor is electrically connected with the controller. As a preferred embodiment, the device further comprises a casing, wherein one end, far away from the linear motor, of the force sensor is fixedly connected with the casing, the linear motor is movably arranged inside the casing, a measuring port is formed in one end, far away from the force sensor, of the casing, and one end, far away from the linear motor, of the measuring head extends out of the casing through the measuring port. As a preferred embodiment, a guide r