Error measurement system

Abstract

The utility model discloses an error measurement system, which is characterized in that the focus of stimulation coil equipment is adopted to sequentially coincide with the position of each mark position, a calibration module is utilized to respectively acquire coordinate values of the focus of the stimulation coil equipment at each mark position, and a measurement module is utilized to calculate the distance between the coordinate values. The method comprises the following steps of: acquiring coordinate values, comparing the distance data with actual distance data between the marker positions to obtain corresponding error values, repeatedly acquiring the coordinate values and comparing for multiple times to obtain a plurality of error values, and calculating an average value of the error values, so as to quickly and accurately determine the error condition and ensure the accuracy of the stimulation coil equipment during stimulation treatment.

Description

Technical Field

[0001] This utility model relates to the field of calibration equipment technology, and in particular to an error measurement system. Background Technology

[0002] Existing technologies typically use optical sensors (such as cameras) to capture light signals emitted by feature points on a target object (such as fluorescent balls), and calculate the three-dimensional position of the target object through methods such as triangulation. However, the three-dimensional position of the target object obtained will have a certain error compared with the actual three-dimensional position. This error is not calculated and there is no subsequent error correction, which affects the accuracy of the entire system in positioning and navigation. Utility Model Content

[0003] The purpose of this invention is to address the technical problems existing in the background technology by proposing an error measurement system.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0005] An error measurement system is installed inside a housing and includes a stimulation coil device, an optical positioning component, a positioning plate, a calibration module, and a measurement module. The optical positioning component is fixedly connected to the stimulation coil device. The positioning plate has multiple markers, and the stimulation coil device is sequentially placed at the corresponding marker positions. The focal point of the stimulation coil device coincides with the position of the marker at its current location. The calibration module has a built-in spatial coordinate system and is used to obtain the first coordinate value of the positioning plate in the spatial coordinate system, identify the optical positioning component on the stimulation coil device, and determine the second coordinate value of the stimulation coil device at each marker. The measurement module is connected to the calibration module and is used to repeatedly measure the error between the distance between each second coordinate value and the actual distance between each marker in reality, obtain multiple error values, and calculate the average value of each error value.

[0006] Preferably, the marking includes a positioning hole, and the focal point of the stimulation coil device coincides with the center position of the positioning hole.

[0007] Preferably, the positioning plate is provided with multiple grooves, each groove corresponding to a positioning hole.

[0008] Preferably, the shape of the groove is the same as the cross-section of the stimulation coil device.

[0009] Preferably, there are four grooves and four markers.

[0010] Preferably, the optical positioning component includes a rigid fixing member, a cross-shaped support member, and four fluorescent balls. The four fluorescent balls are respectively fixedly connected to the four ends of the cross-shaped support member, and the cross-shaped support member is fixedly connected to the stimulation coil device through the rigid fixing member.

[0011] Preferably, the calibration module includes a laser tracker or a high-precision 3D scanner.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects: it uses the focal point of the stimulation coil device to coincide with the position of each target in sequence, and uses the calibration module to obtain the coordinate values ​​of the focal point of the stimulation coil device at each target. The measurement module calculates the distance between each coordinate value, compares these distance data with the actual distance data between each target, and obtains the corresponding error value. The coordinate values ​​are repeatedly collected and compared multiple times to obtain multiple error values. The average value of these error values ​​is calculated to quickly and accurately determine the error situation and ensure the accuracy of the stimulation coil device when performing stimulation therapy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the positioning plate in an embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the optical positioning component in an embodiment of this utility model;

[0015] Figure 3 This is a schematic diagram of the coordinate binding between the positioning plate and the head model in another embodiment of the present invention.

[0016] Icon labels:

[0017] 100 Positioning Plate, 101 Marker Position, 102 Groove;

[0018] 200 optical positioning components. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or assembly referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "" and "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "" and "second," etc., may explicitly or implicitly include one or more features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a link, or a specific connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two groups. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-3 As shown, this utility model proposes an error measurement system, including a stimulation coil device, an optical positioning component 200, a positioning plate 100, a calibration module, and a measurement module. The optical positioning component 200 is fixedly connected to the stimulation coil device. The positioning plate 100 is provided with multiple markers 101. The stimulation coil device is placed sequentially at the corresponding marker 101. The focal point of the stimulation coil device coincides with the position of the marker 101 at the current position. The calibration module has a built-in spatial coordinate system. The calibration module is used to obtain the first coordinate value of the positioning plate 100 in the spatial coordinate system, and to identify the optical positioning component 200 on the stimulation coil device to determine the second coordinate value of the stimulation coil device at each marker 101. The measurement module is connected to the calibration module. The measurement module is used to repeatedly measure the error between the distance between each second coordinate value and the actual distance between each marker 101 in reality, obtain multiple error values, and calculate the average value of each error value.

[0024] Specifically, before using the calibration module, the positions of each marker 101 on the positioning plate 100 and the actual distances between each marker 101 are detected. These actual data are used as control group data. A three-dimensional coordinate system is constructed using the calibration module to collect various coordinates on the positioning plate 100. The three-dimensional coordinate data of each marker 101 are collected with particular emphasis. The stimulation coil device is also constructed into the three-dimensional coordinate system by the calibration module. Under this system, the focal position of the stimulation coil device is moved to the position of each marker 101 in sequence. The calibration module 300 quickly obtains the three-dimensional coordinate value data of the focal position of the stimulation coil device at each marker 101 position. These data are received and analyzed by the measurement module.

[0025] The measurement module analyzes and calculates the distances between the three-dimensional coordinate values ​​of the focal points of the stimulation coil device at each reference point 101, compares these distances with the actual distances between each reference point 101, and calculates the error value. This process is repeated multiple times, acquiring the three-dimensional coordinate values ​​of the focal points of the stimulation coil device and analyzing and calculating the distances between these values ​​to calculate a second error value. The average of the calculated error values ​​is then visualized using a box plot or histogram. In this process, a threshold constraint module is added, with an upper limit of 1mm for the error. This threshold constraint module monitors whether the error value of the measurement module at any measurement point exceeds the upper limit. If it does, the system self-check program is triggered, indicating that the error exceeds the limit.

[0026] The calibration module includes a laser tracker or a high-precision 3D scanner to quickly acquire the 3D coordinates of the positioning plate 100 and the stimulation coil device.

[0027] Furthermore, position 101 includes a positioning hole, and the focal point of the stimulation coil device coincides with the center position of the positioning hole.

[0028] The positioning plate 100 is provided with a plurality of grooves 102, each groove 102 corresponding to a positioning hole.

[0029] The shape of the groove 102 is the same as the cross-section of the stimulation coil device. Both the groove 102 and the marker 101 are provided with 4.

[0030] Specifically, to facilitate the rapid assembly of the positioning plate 100 onto the corresponding mark 101, the design utilizes the shape of the groove 102 being identical to the cross-section of the stimulation coil device. This allows the user to easily and quickly move the positioning plate 100 to the corresponding mark 101, avoiding misalignment between the focal point of the stimulation coil device and the corresponding mark 101. In this embodiment, four marks 101 are provided, i.e., four groove 102 structures. It is important to note that the positions and spacing of the four positioning holes (i.e., marks 101) on the positioning plate 100 strictly match the standard dimensions. In other words, the positioning plate 100 is a standard structure and is used for testing. Based on the standard, the four positioning holes are labeled A, B, C, and D. The dimensions of |AB|, |BC|, and |CD| also match the standard dimensions. The calibration module collects the three-dimensional coordinates of the four positioning holes on the positioning plate 100 and the stimulation coil device on the corresponding four positioning holes to obtain A', B', C', and D'. The measurement module calculates the distances between them as |AB'|, |BC'|, and |CD'| using these three-dimensional coordinates, and measures each distance to compare with the corresponding |AB|, |BC|, and |CD| and calculates the corresponding error value. The data collection and calculation are repeated, and the multiple error values ​​are averaged.

[0031] The optical positioning component 200 includes a rigid fixing member, a cross-shaped support member, and four fluorescent balls. The four fluorescent balls are fixedly connected to the four ends of the cross-shaped support member, and the cross-shaped support member is fixedly connected to the stimulation coil device through the rigid fixing member.

[0032] In another embodiment, an additional set of optical positioning components and a head model are added, as shown in the attached figure. Figure 3 As shown, the head model and positioning plate 100 need to be scanned and calibrated in the corresponding three-dimensional coordinates beforehand by the calibration module. When performing dynamic error compensation, the head model can be moved to a new position or rotated to deviate the position of the optical positioning components on it from the original position. Then, the corresponding three-dimensional coordinates are re-acquired by the calibration module, and the error between the offset and the offset is calculated by the measurement module. This process is repeated several times. The operation is the same as the error calculation of the stimulation coil device mentioned above. Multiple error values ​​are obtained, and the average value of the multiple error values ​​is calculated. Then, the influence of random errors such as environmental vibration and temperature drift is reduced by superimposing data from multiple positions.

[0033] The above description provides one or more embodiments in conjunction with specific content, but it is not intended that the specific implementation of this utility model is limited to these descriptions. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the scope of protection of this utility model.

Claims

1. An error measurement system, characterized in that, include: Stimulation coil device; An optical positioning component (200) is fixedly connected to the stimulation coil device; A positioning plate (100) is provided with a plurality of markers (101), wherein the stimulation coil device is placed in sequence at the corresponding marker (101) position, and the focal point of the stimulation coil device coincides with the position of the marker (101) at the current position; The calibration module has a built-in spatial coordinate system. The calibration module is used to obtain the first coordinate value of the positioning plate (100) under the spatial coordinate system, and to identify the optical positioning component (200) on the stimulation coil device, and to determine the second coordinate value of the stimulation coil device at each of the calibration positions (101). The measurement module is connected to the calibration module. The measurement module is used to repeatedly measure the error between the distance between each of the second coordinate values ​​and the actual distance between each of the coordinates (101) in reality, obtain multiple error values, and calculate the average value of each error value.

2. The error measurement system according to claim 1, characterized in that, The marker (101) includes a positioning hole, and the focal point of the stimulation coil device coincides with the center position of the positioning hole.

3. The error measurement system according to claim 2, characterized in that, The positioning plate (100) is provided with a plurality of grooves (102), each groove (102) corresponding to each positioning hole.

4. The error measurement system according to claim 3, characterized in that, The shape of the groove (102) is the same as the cross-section of the stimulation coil device.

5. The error measurement system according to claim 4, characterized in that, Both the groove (102) and the mark (101) are provided with 4.

6. The error measurement system according to claim 1, characterized in that, The optical positioning component (200) includes a rigid fixing member, a cross-shaped support member, and four fluorescent balls. The four fluorescent balls are respectively fixedly connected to the four ends of the cross-shaped support member, and the cross-shaped support member is fixedly connected to the stimulation coil device through the rigid fixing member.

7. The error measurement system according to claim 1, characterized in that, The calibration module includes a laser tracker or a high-precision 3D scanner.

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