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CN-224216062-U - Error measurement system

CN224216062UCN 224216062 UCN224216062 UCN 224216062UCN-224216062-U

Abstract

The utility model discloses an error measurement system, which sequentially overlaps the positions of all the benchmarks by adopting the focus of a stimulation coil device, respectively acquires coordinate values of the focus of the stimulation coil device at all the benchmarks by utilizing a calibration module, calculates the distance between each coordinate value by utilizing a measurement module, compares the distance data with the distance data between the actual benchmarks to obtain corresponding error values, repeatedly acquires the coordinate values and compares the coordinate values for a plurality of times to obtain a plurality of error values, calculates the average value of the error values, and rapidly and accurately determines the error condition, thereby ensuring the accuracy of the stimulation coil device when executing stimulation treatment.

Inventors

  • LI LU
  • DING YUSONG
  • CHEN SIXUAN
  • Bao Yunjiao

Assignees

  • 深圳英智科技有限公司

Dates

Publication Date
20260508
Application Date
20250526

Claims (7)

  1. 1. An error measurement system, comprising: a stimulation coil device; An optical positioning assembly (200), the optical positioning assembly (200) being fixedly connected to the stimulation coil device; The positioning plate (100), a plurality of targets (101) are arranged on the positioning plate (100), wherein the stimulation coil equipment is sequentially arranged at the positions of the corresponding targets (101), and the focus of the stimulation coil equipment is overlapped with the positions of the targets (101) at the current position; The calibration module is internally provided with a space coordinate system and is used for acquiring a first coordinate value of the positioning plate (100) under the space coordinate system and identifying the optical positioning assembly (200) on the stimulation coil device, and determining a second coordinate value of the stimulation coil device at each position (101) respectively; The measuring module is connected with the calibration module and is used for repeatedly measuring the error between the distance between the second coordinate values and the actual distance between the positions (101) in reality to obtain a plurality of error values and obtain the average value of the error values.
  2. 2. An error measurement system according to claim 1, characterized in that the target (101) comprises a positioning hole, the focal point of the stimulation coil device coinciding with the central position of the positioning hole at the present time.
  3. 3. An error measurement system according to claim 2, wherein the positioning plate (100) is provided with a plurality of grooves (102), each groove (102) corresponding to each positioning hole.
  4. 4. An error measurement system according to claim 3, characterized in that the shape of the recess (102) is the same as the cross section of the stimulation coil device.
  5. 5. An error measurement system according to claim 4, characterized in that the grooves (102) and the targets (101) are each provided with 4.
  6. 6. The error measurement system of claim 1, wherein the optical positioning assembly (200) comprises a rigid mount, a cross-like support, and four fluorescent balls fixedly connected to the four ends of the cross-like support, respectively, the cross-like support being fixedly connected to the stimulation coil device by the rigid mount.
  7. 7. An error measurement system according to claim 1, wherein the calibration module comprises a laser tracker or a high precision three-dimensional scanner.

Description

Error measurement system Technical Field The utility model relates to the technical field of calibration equipment, in particular to an error measurement system. Background The prior art generally uses an optical sensor (such as a camera) to capture an optical signal sent by a characteristic point (such as a fluorescent ball) on a target object, and calculates the three-dimensional position of the target object by a method such as triangulation, but a certain error is generated between the three-dimensional position of the target object obtained by the prior art and the actual three-dimensional position, and the error is not calculated and is not corrected subsequently, so that the accuracy of the whole system in positioning and navigation is affected. Disclosure of utility model The utility model aims at solving the technical problems in the background art and provides an error measurement system. In order to achieve the technical purpose, the technical scheme adopted in the aspect of the utility model is as follows: An error measurement system is used for being installed in a cover body and comprises a stimulation coil device, an optical positioning assembly, a positioning plate, a calibration module and a measurement module, wherein the optical positioning assembly is fixedly connected to the stimulation coil device, a plurality of calibration positions are arranged on the positioning plate, the stimulation coil device is sequentially arranged at the corresponding calibration positions, the focus of the stimulation coil device coincides with the current calibration position, a space coordinate system is arranged in the calibration module, the calibration module is used for acquiring a first coordinate value of the positioning plate under the space coordinate system, identifying an optical positioning assembly on the stimulation coil device, determining second coordinate values of the stimulation coil device at each calibration position respectively, the measurement module is connected with the calibration module, and the measurement module is used for repeatedly measuring errors of distances between the second coordinate values and actual distances between the calibration positions in reality to obtain a plurality of error values and calculate the average value of the error values. Preferably, the index comprises a locating hole, and the focus of the stimulating coil device coincides with the central position of the locating hole where it is currently located. Preferably, the positioning plate is provided with a plurality of grooves, and each groove corresponds to each positioning hole. Preferably, the shape of the recess is the same as the cross section of the stimulation coil device. Preferably, the grooves and the targets are each provided with 4. Preferably, the optical positioning assembly comprises a rigid fixing piece, a cross-like support piece and four fluorescent balls, wherein the four fluorescent balls are respectively and fixedly connected to four end parts of the cross-like support piece, and the cross-like support piece is fixedly connected to the stimulation coil device through the rigid fixing piece. Preferably, the calibration module comprises a laser tracker or a high precision three-dimensional scanner. Compared with the prior art, the method has the advantages that the focus of the stimulation coil device is overlapped with the positions of the targets in sequence, the coordinate values of the focus of the stimulation coil device at the positions of the targets are respectively obtained by the calibration module, the distance between each coordinate value is calculated by the measurement module, the distance data are compared with the distance data between the actual targets to obtain corresponding error values, the coordinate values are repeatedly collected and compared for multiple times to obtain a plurality of error values, the average value of the error values is calculated, and the error condition is rapidly and accurately determined, so that the accuracy of the stimulation coil device in the process of executing stimulation treatment is ensured. Drawings FIG. 1 is a schematic view of a positioning plate according to an embodiment of the present utility model; FIG. 2 is a schematic diagram of an optical positioning assembly according to an embodiment of the present utility model; Fig. 3 is a schematic diagram of coordinate binding between a positioning plate and a head model according to another embodiment of the present utility model. Reference numerals: 100 positioning plates, 101 marks and 102 grooves; 200 optical positioning assembly. Detailed Description It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "ri