A position measurement system and method

Abstract

The application discloses a position measurement system and method, and belongs to the field of new energy, wherein the position measurement system comprises a support leveling device, a two-dimensional rotating device and a range finder. The mounting surface is adjusted to a horizontal state through the leveling part of the support leveling device, thereby providing a reliable horizontal reference for the position measurement system; the range finder is driven by the two-dimensional rotating device to rotate accurately around the vertical direction and the horizontal direction, so that the range finder can accurately aim at the measuring point of the measured object. The whole process does not need manual contact measurement by using a tape or a caliper, thereby reducing the influence of manual operation factors on the measurement result. Since the pointing angle and distance measurement of the range finder are completed by mechanical driving and electronic measurement, the repeatability and consistency of the measurement result are significantly improved, and the position measurement demand of high-precision structural members such as a heliostat support can be met.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a position measurement system and method. Background Technology

[0002] Solar energy, as a clean and renewable energy source, has advantages such as abundant resources, wide distribution, and inexhaustible availability. However, the energy flux density of solar energy is relatively low, and it usually needs to be concentrated in practical applications. Solar thermal power generation is one way to utilize solar energy on a large scale.

[0003] Solar thermal power generation includes tower solar thermal power generation, and heliostat fields are a key component of tower solar thermal power generation for realizing the reflection and concentration of sunlight. Heliostats track the movement of the sun and reflect sunlight onto the receiver at the top of the solar collector tower or a designated location, thereby converting solar radiation energy into heat energy.

[0004] A heliostat field consists of multiple heliostats, and its construction cost accounts for a significant portion of the initial investment in a solar thermal power plant. Furthermore, the reflection and concentration accuracy of the heliostats directly affect the system's heat collection and power generation efficiency. The positional accuracy of the heliostat support frame, as the structural component supporting the heliostat mirror assembly, is a crucial factor in ensuring the optical performance of the heliostats.

[0005] In related technologies, measuring tapes and calipers are often used to measure the position of heliostat supports. Although these measurement methods are simple in structure and low in cost, they are greatly affected by manual operation and have limited measurement accuracy, making it difficult to meet the needs of high-precision position measurement of heliostat supports.

[0006] Therefore, how to reduce the impact of human operation factors on measurement results and improve measurement accuracy has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] This application proposes a position measurement system to reduce the impact of human operation on measurement results and improve measurement accuracy. This application also provides a position measurement method using the above-described position measurement system.

[0008] To achieve the above objectives, this application provides a position measurement system, including a support leveling device, a two-dimensional rotation device, and a rangefinder;

[0009] The support leveling device includes a leveling part and a mounting part, wherein the leveling part is used to adjust the mounting surface of the mounting part to a horizontal state;

[0010] The two-dimensional rotating device is mounted on the mounting surface, and the rangefinder is mounted on the two-dimensional rotating device. The two-dimensional rotating device is used to drive the rangefinder to rotate around the vertical and horizontal directions respectively, so that the rangefinder is aligned with the measurement point of the object to be measured. The rangefinder is used to measure the distance between the rangefinder and the measurement point.

[0011] Specifically, the spatial coordinates of the measurement point are obtained by using a first rotation angle of the rangefinder around the vertical direction, a second rotation angle of the rangefinder around the horizontal direction, and the distance. The spatial coordinates are used to compare with the design coordinates of the measurement point to obtain the position error of the measurement point.

[0012] Optionally, in the above-described position measurement system, the two-dimensional rotation device includes a mounting frame, a first driving member, and a second driving member;

[0013] The mounting bracket includes a horizontal part and a vertical part. The first driving member is mounted on the mounting surface. The output end of the first driving member is connected to the horizontal part. The rotation axis of the output end of the first driving member is parallel to the vertical direction.

[0014] The vertical part is equipped with the second driving component, the output end of the second driving component is equipped with the rangefinder, and the rotation axis of the output end of the second driving component is parallel to the horizontal direction.

[0015] Optionally, in the above position measurement system, the output end of the second drive member is provided with a clamp, and the clamp is coaxially mounted on the output end of the second drive member;

[0016] The rangefinder is mounted on the card head, and the ranging direction of the rangefinder is perpendicular to the axis of the card head.

[0017] Optionally, in the above-described position measurement system, the mounting bracket is an L-shaped bracket;

[0018] The horizontal plate of the L-shaped frame serves as the horizontal part, and the vertical plate of the L-shaped frame serves as the vertical part.

[0019] Optionally, in the above-mentioned position measurement system, the leveling part of the support leveling device is a gimbal, and the mounting part of the support leveling device is a support frame;

[0020] The support frame is connected to the two-dimensional rotating device, and the surface of the support frame used to mount the two-dimensional rotating device is the mounting surface.

[0021] The side of the support frame opposite to the mounting surface is connected to the gimbal.

[0022] Optionally, in the above-described position measurement system, the support leveling device further includes an inclinometer, which is installed on the support frame and used to detect the levelness of the support frame.

[0023] Optionally, in the above-described position measurement system, the support leveling device further includes a locking element, which is used to lock the support frame after the mounting surface is adjusted to a horizontal state.

[0024] Optionally, the above-described location measurement system further includes a locator for obtaining the geographic location of the location measurement system.

[0025] Optionally, in the above-described position measurement system, the rangefinder is a laser rangefinder.

[0026] Secondly, this application also provides a position measurement method, including:

[0027] Adjust the mounting surface of the support and leveling device to a horizontal position;

[0028] A two-dimensional rotation device drives a rangefinder to rotate in both the vertical and horizontal directions, so that the rangefinder is aligned with the measurement point of the object to be measured.

[0029] The first rotation angle of the rangefinder driven by the two-dimensional rotation device in the vertical direction and the second rotation angle in the horizontal direction are obtained, and the distance between the rangefinder and the measurement point is measured.

[0030] The spatial coordinates of the measurement point are obtained based on the first rotation angle, the second rotation angle, and the distance, and the spatial coordinates are compared with the design coordinates of the measurement point to obtain the position error of the measurement point.

[0031] This application provides a position measurement system, including a support and leveling device, a two-dimensional rotation device, and a rangefinder. The leveling part of the support and leveling device adjusts the mounting surface to a horizontal state, providing a reliable horizontal reference for the position measurement system. The two-dimensional rotation device drives the rangefinder to rotate precisely around the vertical and horizontal directions, enabling the rangefinder to accurately align with the measurement point of the component under test. The entire process eliminates the need for manual contact measurement using a measuring tape or calipers, reducing the impact of human operation on the measurement results. Since the pointing angle and distance measurements of the rangefinder are both mechanically driven and electronically measured, the repeatability and consistency of the measurement results are significantly improved, meeting the position measurement requirements of high-precision structural components such as heliostat supports.

[0032] This application also proposes a position measurement method applicable to the position measurement device described in any of the above-mentioned schemes. Since the position measurement device possesses the aforementioned technical effects, the position measurement method applicable to it also possesses the same technical effects, and will not be elaborated further here. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0034] Figure 1 This is a schematic diagram of the structure of the position measurement system provided in the embodiments of this application;

[0035] Figure 2 This is a schematic diagram of the support and leveling device provided in the embodiments of this application;

[0036] Figure 3 This is a schematic diagram of the mounting bracket provided in an embodiment of this application;

[0037] Figure 4 This is a schematic diagram of the structure of the second driving component provided in an embodiment of this application;

[0038] Figure 5 This is a schematic diagram of the card header structure provided in an embodiment of this application;

[0039] Figure 6 The schematic diagram provided for the embodiments of this application.

[0040] in:

[0041] 100 - Support and leveling device; 110 - Leveling section; 120 - Mounting section;

[0042] 200 - Two-dimensional rotation device; 210 - Mounting bracket; 220 - First driving component; 230 - Second driving component; 231 - Clamping head;

[0043] 300-rangefinder;

[0044] 400-locator. Detailed Implementation

[0045] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0046] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0047] It should be understood that the terms "system," "apparatus," "unit," and / or "module" used in this application are a method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0048] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0049] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0050] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0051] In related technologies, staff typically use tools such as tape measures and calipers to measure the position of heliostat supports. Although this method is simple in structure and low in cost, the measurement results are greatly affected by human operation factors, and it is difficult to achieve high-precision spatial coordinate measurement, which cannot meet the needs of high-precision position measurement of heliostat supports.

[0052] In the first aspect, this application discloses a position measurement system that can be used to detect the position error of a heliostat support, and is particularly suitable for measuring the spatial position of multiple measurement points on the support after the heliostat support is installed or during the assembly process in a tower solar thermal power generation system.

[0053] The location measurement system disclosed in this solution, such as Figure 1 As shown, it includes a support leveling device 100, a two-dimensional rotation device 200, and a rangefinder 300.

[0054] The leveling support 100 provides a stable mounting reference for the two-dimensional rotation device 200 and the rangefinder 300. The two-dimensional rotation device 200 changes the direction of the rangefinder 300, which measures the distance between itself and a measurement point on the workpiece. The rotation angles of the rangefinder 300 in two directions are obtained using the two-dimensional rotation device 200, and combined with the distances measured by the rangefinder 300, the spatial coordinates of the measurement point are calculated. These spatial coordinates are then compared with the design coordinates of the measurement point to obtain the positional error of the measurement point.

[0055] The leveling support device 100 includes a leveling section 110 and a mounting section 120. The leveling section 110 is used to adjust the levelness of the mounting surface of the mounting section 120 so that the mounting surface is level. A two-dimensional rotating device 200 is mounted on the mounting surface of the mounting section 120.

[0056] The two-dimensional rotation device 200 is used to drive the rangefinder 300 to rotate around the vertical and horizontal rotation axes, respectively. Under the drive of the two-dimensional rotation device 200, the rangefinder 300 can point to different measurement points on the workpiece to be measured.

[0057] Once the rangefinder 300 is aligned with the measurement point, it transmits a distance measurement signal and receives a return signal, thereby obtaining the distance between the rangefinder 300 and the measurement point.

[0058] This scheme first establishes a horizontal installation benchmark using a leveling device 100, then uses a two-dimensional rotation device 200 to obtain the first and second rotation angles of the rangefinder 300, and finally calculates the spatial coordinates of the measurement point based on the distance measured. Figure 1 As shown, the first driving member 220 rotates left and right, and the second driving member 230 rotates back and forth.

[0059] Compared with manual measurement methods such as tape measures and calipers, the position measurement system disclosed in this solution reduces errors caused by manual reading and positioning, and reduces the impact of human operation factors on the measurement results. At the same time, since the pointing angle and distance measurement of the rangefinder 300 are completed by mechanical drive and electronic measurement, the repeatability and consistency of the measurement results are significantly improved, which can meet the position measurement requirements of high-precision structural components such as heliostat brackets.

[0060] Since the rangefinder 300 can be aligned with any measurement point on the workpiece by the two-dimensional rotation device 200, it can improve measurement efficiency and increase the measurement range.

[0061] Since the position of the rangefinder 300 in space is known (determined by the installation positions of the support leveling device 100 and the two-dimensional rotation device 200), the spatial coordinates of the measurement point in the preset coordinate system are calculated using spatial geometric coordinates. Furthermore, by comparing the measured spatial coordinates of the measurement point with its pre-set theoretical design coordinates, the positional error of the measurement point can be accurately obtained, such as the deviation values ​​of the point in the X, Y, and Z directions. This positional error is then digitized and quantified.

[0062] In some embodiments of this application, the two-dimensional rotation device 200 includes a mounting bracket 210, a first driving member 220, and a second driving member 230.

[0063] Mounting bracket 210 includes a horizontal part and a vertical part, which are perpendicular to each other. The horizontal part is used to connect to the output end of the first driving member 220, and the vertical part is used to mount the second driving member 230.

[0064] The first driving member 220 is located between the support and leveling device 100 and the horizontal portion of the mounting bracket 210. The first driving member 220 is mounted on the mounting surface of the support and leveling device 100, and its output end is connected to the horizontal portion of the mounting bracket 210. The rotation axis of the output end of the first driving member 220 is parallel to the vertical direction. Figure 1 As shown, the first driving component 220 drives the mounting bracket 210 to rotate to the left or right about the vertical rotation axis.

[0065] The second drive unit 230 is mounted on the vertical part of the mounting bracket 210. A rangefinder 300 is mounted on the output end of the second drive unit 230, and the rotation axis of the output end of the second drive unit 230 is parallel to the horizontal direction. Figure 1 As shown, the second driving component 230 drives the rangefinder 300 to swing forward or backward around the horizontal rotation axis.

[0066] The rotation axis of the output shaft of the first drive member 220 is perpendicular to the rotation axis of the output end of the second drive member 230.

[0067] The first drive component 220 drives the mounting bracket 210, the second drive component 230 mounted on the mounting bracket 210, and the rangefinder 300 to rotate as a whole in the vertical direction, thereby achieving azimuth adjustment of the rangefinder 300 in the horizontal direction. The second drive component 230 drives the rangefinder 300 to rotate in the horizontal direction, thereby achieving pitch adjustment of the rangefinder 300 in the vertical direction. After the first drive component 220 and the second drive component 230 cooperate, the rangefinder 300 can adjust its direction within a certain spatial range, so that the rangefinder 300 is aligned with the measurement point of the object to be measured.

[0068] The direction of the rangefinder 300 is determined by two independent rotational degrees of freedom, which facilitates the establishment of a coordinate calculation model. When the mounting surface is leveled, the rotation axis of the first drive component 220 is parallel to the vertical direction, and the rotation axis of the second drive component 230 is parallel to the horizontal direction. This reduces attitude coupling errors during coordinate calculation and improves the reliability of spatial coordinate calculation of the measurement point.

[0069] The first drive unit 220 and the second drive unit 230 can be selected from at least one of a direct drive motor, a servo motor, a stepper motor, or a rotary actuator with angle feedback function.

[0070] Preferably, the first drive component 220 and the second drive component 230 are direct drive motors. Direct drive motors can directly output torque and drive the corresponding components to rotate, reducing transmission backlash and return error caused by intermediate transmission mechanisms such as gears, belts, or lead screws, which is beneficial to improving angle control accuracy and repeatability.

[0071] Optionally, the first drive unit 220 and the second drive unit 230 may also be configured with an encoder, an angle sensor or an internal feedback unit of the motor to obtain the corresponding rotation angle in real time.

[0072] The output end of the second driving component 230 is provided with a clamp 231, which is coaxially mounted on the output end of the second driving component 230. The rangefinder 300 is mounted on the clamp 231, and the ranging direction of the rangefinder 300 is perpendicular to the axis of the clamp 231.

[0073] The clamp 231 is a holding structure or mounting base used to fix the rangefinder 300. For example... Figure 5 As shown, the clamp head 231 includes a connecting plate, which is connected to the second drive member 230. The part of the clamp head 231 used to fix the rangefinder 300 is columnar, sleeve-shaped, or clamping seat-shaped. The clamp head 231 is provided with at least one of the following for installing the rangefinder 300: clamping hole, positioning groove, locking screw, pressure plate, and positioning pin, so as to adapt to rangefinders 300 of different specifications.

[0074] The chuck 231 rotates synchronously with the output end of the second drive unit 230, and the rotation axis of the chuck 231 is coaxial with the rotation axis of the output end of the second drive unit 230.

[0075] When the second driving component 230 rotates, it drives the clasp 231 to rotate synchronously, and the clasp 231 drives the rangefinder 300 to rotate synchronously.

[0076] Optionally, a measurement coordinate system is established using a preset point on the rotation axis of the output end of the first driving member 220 as the origin. The rotation axis of the output end of the first driving member 220 can be used as the vertical reference axis of the measurement coordinate system, and the rotation axis of the output end of the second driving member 230 can be used as the horizontal reference axis of the measurement coordinate system. The offset of the installation position of the rangefinder 300 relative to the origin can be used as a system parameter in spatial coordinate conversion.

[0077] The locator 231 provides a foundation for the stable installation of the rangefinder 300, ensuring a defined geometric relationship between the rangefinder 300 and the second drive unit 230.

[0078] Since the locator 231 is coaxially mounted at the output end of the second drive unit 230, the rotation axis of the locator 231 is consistent with the rotation axis of the output end of the second drive unit 230. When the rangefinder 300 rotates with the locator 231, its pitch angle can be directly determined by the rotation angle of the second drive unit 230.

[0079] The ranging direction of the rangefinder 300 is perpendicular to the axis of the caliper 231, which allows the ranging direction to form a stable rotation plane under the drive of the second drive member 230. The rotation plane of the rangefinder 300 is parallel to the rotation axis of the output end of the first drive member 220, which facilitates the establishment of spatial coordinate relationships based on the ranging direction, rotation angle and distance.

[0080] In some embodiments of this application, such as Figure 3 and Figure 4 As shown, the mounting bracket 210 is an L-shaped bracket, which includes a horizontal plate and a vertical plate. The horizontal plate serves as the horizontal part, and the vertical plate serves as the vertical part.

[0081] The horizontal plate is connected to the output end of the first driving component 220, and the vertical plate is used to mount the second driving component 230. The horizontal plate and the vertical plate can be fixedly connected or integrally formed.

[0082] Preferably, the angle between the horizontal plate and the vertical plate is 90°, so that the rotation axis of the first driving member 220 is perpendicular to the rotation axis of the second driving member 230.

[0083] The L-shaped frame structure is simple, easy to process and assemble, and can achieve an orthogonal arrangement of two driving components within a limited space. The horizontal plate is used to receive the output of the first driving component 220, and the vertical plate is used to install the second driving component 230, so that the first driving component 220 is responsible for azimuth rotation and the second driving component 230 is responsible for pitch rotation. The movements of the first driving component 220 and the second driving component 230 are independent of each other, which helps to improve the accuracy of spatial coordinate calculation.

[0084] In some embodiments of this application, such as Figure 2 As shown, the leveling part 110 of the support leveling device 100 is a gimbal, and the mounting part 120 is a support frame. The support frame is connected to the two-dimensional rotating device 200, and the surface of the support frame used to mount the two-dimensional rotating device 200 is the mounting surface. The surface of the support frame opposite to the mounting surface is connected to the gimbal.

[0085] The gimbal has flexible attitude adjustment capabilities, allowing the support frame to be adjusted to a horizontal state even if the ground or foundation at the measurement site is tilted. Once the mounting surface of the support frame is adjusted to a horizontal state, the two-dimensional rotation device 200 is installed on the adjusted horizontal mounting surface. The support frame provides a rigid mounting platform for the two-dimensional rotation device 200, making the installation of the first drive component 220 more stable.

[0086] The gimbal can be a ball head gimbal, a 3D adjustable gimbal, a precision adjustment platform, or a leveling mechanism with three adjustable feet. The support frame can be a plate-shaped support frame, a frame-type support frame, or a support platform with reinforcing ribs. The mounting surface of the support frame can be provided with multiple mounting holes to accommodate different specifications of 2D rotating devices 200.

[0087] The leveling device 100 also includes an inclinometer.

[0088] An inclinometer is mounted on a support frame to check the levelness of the support frame's mounting surface. When adjusting the pan-tilt head, the operator can adjust the pan-tilt head based on the tilt angle or levelness information displayed by the inclinometer until the mounting surface of the support frame reaches the preset level requirement.

[0089] Using an inclinometer for leveling, the inclinometer can quantify the horizontal state of the mounting surface, avoiding leveling errors caused by relying solely on visual or experience judgment, improving the initial reference accuracy of the position measurement system, and improving the calculation accuracy of the spatial coordinates of the measurement points.

[0090] To further optimize the above technical solution, the support leveling device 100 also includes a locking component. The locking component is used to lock the support frame after the mounting surface is adjusted to a horizontal state. After the gimbal levels the support frame, the locking component is tightened to keep the gimbal and support frame in the leveled position.

[0091] The locking mechanism can be a fastening screw or a locking knob on the pan-tilt unit. By fixing the support frame with the locking mechanism, the mounting surface remains horizontal during measurement, ensuring that multiple measurement points are under a unified measurement reference, thus improving the consistency of multi-point measurement results.

[0092] The locking mechanism can be either a single-point locking structure or a multi-point locking structure.

[0093] In some embodiments of this application, the location measurement system further includes a locator 400. The locator 400 is used to obtain the geographic location of the location measurement system.

[0094] The locator 400 can be mounted on the support and leveling device 100. Optionally, the locator 400 can be mounted on a pan-tilt unit or support frame. The locator 400 can be a GPS positioning module, a BeiDou positioning module, a GNSS positioning module, or other positioning devices capable of acquiring geographic location.

[0095] When the locator 400 is a GPS positioning module, the GPS positioning module is used to obtain the latitude and longitude of the location of the location measurement system.

[0096] In some embodiments of this application, the rangefinder 300 is a laser rangefinder.

[0097] The laser rangefinder is mounted on the caliper head 231 and rotates with the two-dimensional rotation device 200. During measurement, the laser rangefinder emits a laser beam towards the measurement point of the workpiece. After the laser beam illuminates the measurement point, it returns, and the laser rangefinder calculates the distance between itself and the measurement point based on the return signal.

[0098] Laser rangefinders are characterized by non-contact operation, fast response, and high accuracy, making them suitable for rapid measurement of multiple points on a heliostat support. Compared to manual contact measurement, laser rangefinders do not require the operator to directly contact the measurement point, thus reducing the impact of manual operation on the measurement results and facilitating the measurement of distant, high, or inaccessible locations.

[0099] The rangefinder 300 can also be equipped with an infrared rangefinder, a structured light rangefinder, a TOF rangefinder sensor, or other non-contact rangefinders, depending on the application scenario.

[0100] Secondly, this application also provides a position measurement method, implemented using the position measurement system described in any of the above-mentioned schemes. Since the position measurement system has the aforementioned technical effects, the method using this position measurement system also has the same technical effects, and will not be elaborated further here.

[0101] Before measurement, the component to be measured is placed at a predetermined measurement position. The component to be measured can be a heliostat support or other structural components that require detection of spatial position errors. In an embodiment where the component to be measured is a heliostat support, the heliostat support is placed at the predetermined measurement position, and the position measurement system uses a rangefinder 300 to align with the measurement point on the heliostat support to perform the measurement.

[0102] During measurement, first adjust the support leveling device 100 to ensure that its mounting surface is horizontal. Specifically, use an inclinometer to check the horizontality of the mounting surface to ensure the support frame's mounting surface meets the horizontal requirements, and then lock the support frame using the locking mechanism.

[0103] Then, the two-dimensional rotation device 200 drives the rangefinder 300 to rotate in both the vertical and horizontal directions, aligning the rangefinder 300 with the measurement point on the workpiece. Specifically, the first drive member 220 drives the mounting bracket 210, the second drive member 230, and the rangefinder 300 to rotate as a whole in the vertical direction to adjust the horizontal orientation of the rangefinder 300; the second drive member 230 drives the clamp 231 and the rangefinder 300 to rotate in the horizontal direction to adjust the pitch direction of the rangefinder 300. Through rotation in both directions, the ranging direction of the rangefinder 300 is aligned with the target measurement point on the workpiece.

[0104] Once the rangefinder 300 is aligned with the measurement point, the first rotation angle of the rangefinder 300 driven by the two-dimensional rotation device 200 in the vertical direction and the second rotation angle in the horizontal direction are obtained, and the distance between the rangefinder 300 and the measurement point is measured at the same time.

[0105] The spatial coordinates of the measurement point are obtained based on the first rotation angle, the second rotation angle, and the distance.

[0106] Optionally, the initial position of the rangefinder 300 or the rotation center of the two-dimensional rotation device 200 is used as the coordinate origin. Spatial coordinates are calculated by combining the first rotation angle, the second rotation angle, and the distance measured, to obtain the spatial coordinates of the measurement point. These spatial coordinates are then compared with the design coordinates of the measurement point to obtain the positional deviation of the measurement point. For example... Figure 6 As shown.

[0107]

[0108]

[0109]

[0110] This solution transforms manual measurement with rulers into spatial coordinate measurement. The coordinates of the measurement points are determined by angles and distances, both of which can be automatically acquired by the instrument. This overcomes the limitations of traditional manual measurement methods such as tape measures and calipers, which have limited accuracy and are greatly affected by human operation. It is particularly suitable for detecting the positional error of heliostat supports, which helps improve the installation accuracy of heliostat supports, thereby enhancing the reflection accuracy of heliostats and the concentration efficiency of solar thermal power generation systems.

[0111] Since the rangefinder 300 can be aligned with any measurement point on the workpiece by the two-dimensional rotation device 200, it can improve measurement efficiency and increase the measurement range.

[0112] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A position measurement system, characterized in that, It includes a support leveling device (100), a two-dimensional rotation device (200), and a rangefinder (300); The support leveling device (100) includes a leveling part (110) and a mounting part (120), wherein the leveling part (110) is used to adjust the mounting surface of the mounting part (120) to a horizontal state; The two-dimensional rotating device (200) is mounted on the mounting surface, and the rangefinder (300) is mounted on the two-dimensional rotating device (200). The two-dimensional rotating device (200) is used to drive the rangefinder (300) to rotate around the vertical and horizontal directions respectively, so that the rangefinder (300) is aligned with the measurement point of the workpiece to be measured. The rangefinder (300) is used to measure the distance between the rangefinder (300) and the measurement point. Specifically, the spatial coordinates of the measurement point are obtained by using the first rotation angle of the rangefinder (300) rotating around the vertical direction, the second rotation angle of the rangefinder (300) rotating around the horizontal direction, and the distance. The spatial coordinates are used to compare with the design coordinates of the measurement point to obtain the position error of the measurement point.

2. The position measurement system according to claim 1, characterized in that, The two-dimensional rotation device (200) includes a mounting bracket (210), a first driving member (220), and a second driving member (230); The mounting bracket (210) includes a horizontal part and a vertical part. The first driving member (220) is mounted on the mounting surface. The output end of the first driving member (220) is connected to the horizontal part. The rotation axis of the output end of the first driving member (220) is parallel to the vertical direction. The vertical part is equipped with the second driving member (230), the output end of the second driving member (230) is equipped with the rangefinder (300), and the rotation axis of the output end of the second driving member (230) is parallel to the horizontal direction.

3. The position measurement system according to claim 2, characterized in that, The output end of the second driving member (230) is provided with a clamp (231), and the clamp (231) is coaxially mounted on the output end of the second driving member (230); The rangefinder (300) is mounted on the card head (231), and the ranging direction of the rangefinder (300) is perpendicular to the axis of the card head (231).

4. The position measurement system according to claim 2, characterized in that, The mounting bracket (210) is an L-shaped bracket; The horizontal plate of the L-shaped frame serves as the horizontal part, and the vertical plate of the L-shaped frame serves as the vertical part.

5. The position measurement system according to claim 1, characterized in that, The leveling part (110) of the support leveling device (100) is a gimbal, and the mounting part (120) of the support leveling device (100) is a support frame; The support frame is connected to the two-dimensional rotating device (200), and the surface of the support frame used to mount the two-dimensional rotating device (200) is the mounting surface; The side of the support frame opposite to the mounting surface is connected to the gimbal.

6. The position measurement system according to claim 5, characterized in that, The support leveling device (100) also includes an inclinometer, which is installed on the support frame and used to detect the levelness of the support frame.

7. The position measurement system according to claim 5, characterized in that, The support leveling device (100) further includes a locking member for locking the support frame after the mounting surface is adjusted to a horizontal state.

8. The position measurement system according to claim 1, characterized in that, It also includes a locator (400) for obtaining the geographic location of the location measurement system.

9. The position measurement system according to claim 1, characterized in that, The rangefinder (300) is a laser rangefinder.

10. A position measurement method, characterized in that, include: Adjust the mounting surface of the support leveling device (100) to a horizontal state; The two-dimensional rotation device (200) drives the rangefinder (300) to rotate in the vertical and horizontal directions respectively, so that the rangefinder (300) is aligned with the measurement point of the object to be measured; The first rotation angle and the second rotation angle of the rangefinder (300) driven by the two-dimensional rotation device (200) to rotate in the vertical direction are obtained, and the distance between the rangefinder (300) and the measurement point is measured. The spatial coordinates of the measurement point are obtained based on the first rotation angle, the second rotation angle, and the distance, and the spatial coordinates are compared with the design coordinates of the measurement point to obtain the position error of the measurement point.

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