Multi-connected guide vane profile measurement reference platform

Abstract

The invention belongs to the technical field of blade optical measurement, and particularly relates to a multi-union guide blade profile measurement reference platform which comprises a measurement box body, a measurement chamber is arranged in the measurement box body, a measurement base is arranged at the bottom of the measurement chamber, and an optical measurement system and a purification system are further arranged in the measurement chamber. According to different sizes and contours of different to-be-measured workpieces, the distribution of the multiple fixing rods can be reasonably arranged, different non-standard workpieces can be limited and fixed, and compared with an existing special clamp which is independently designed, the special clamp has a larger application range; after the workpiece to be measured is limited, the position and posture adjusting assembly is started to adjust the positions of the moving seat and the measuring block, the line laser sensor on the measuring block is started to calculate and collect three-dimensional contour information of the workpiece, three-dimensional modeling is conducted on the workpiece, production requirements are compared, and the size error of workpiece machining is calculated. The workpiece quality inspection precision is improved, and the qualified rate of workpieces is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of blade optical measurement, in particular to a multi-joint guide blade profile measurement reference platform. Background Art

[0002] Guide vanes, as stationary parts, are mainly responsible for reducing the rotational kinetic energy of the fluid when it enters the turbine, optimizing the streamline, and thus ensuring that the fluid enters the next stage in the best condition. They are usually strong and durable and made of metal to adapt to various working conditions.

[0003] Large blade workpieces are often formed by casting. Because they are usually suitable for aircraft engines, they have high requirements for precision. Therefore, during the production and processing, multiple dimensional measurements are required to detect whether each component meets the predetermined design dimensions and whether the dimensional error of the processing is within the allowable range, and to strictly control the processing accuracy.

[0004] When it is necessary to measure the profile of a multi-guide vane workpiece, the existing technology mainly uses the standard template method and the three-coordinate machine detection method. This contact detection method not only has low detection efficiency and is difficult to adapt to the needs of mass production, but also has limited detection accuracy and is difficult to meet the production requirements of existing high-precision workpieces. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a multi-joint guide blade profile measurement reference platform.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention proposes a multi-joint guide blade profile measurement reference platform, comprising a measurement box, a measurement chamber is arranged inside the measurement box, a measurement base is arranged at the bottom of the measurement chamber, and an optical measurement system and a purification system are also arranged inside the measurement chamber; The optical measurement system comprises a measurement block, on which a linear laser sensor is arranged, and the measurement block is mounted on a movable seat of a position and posture adjustment component in the measurement chamber to adjust the position and posture of the measurement block in the measurement chamber; The purification system includes a purification fan, the air outlet end of the purification fan is communicated with the interior of the measurement chamber, and the air outlet slot at the bottom of the measurement box is communicated with the interior of the measurement chamber; The bottom surface of the measuring base is evenly provided with fixing holes, and fixing rods are installed inside the fixing holes. An L-shaped limiting rod is provided near the bottom of the fixing rod, and the length of the horizontal part of the limiting rod is greater than the spacing between adjacent fixing holes.

[0007] Preferably, the output end of the propulsion device on the posture adjustment assembly is connected to the moving seat, and a rotating device is provided at the joint between the moving seat and the output end of the propulsion device, and both the propulsion device and the rotating device are controlled by an external controller; An adjustment hole is arranged at a position of the end of the measuring block close to the line laser sensor, and the aperture of the adjustment hole is smaller than the aperture of the fixing rod.

[0008] Preferably, the opening of the adjustment hole is conical, and the central axis of the adjustment hole coincides with the central axis of the output end of the rotating device, and the distance between the adjustment hole and the line laser sensor is smaller than the distance between the fixing rod and the limiting rod.

[0009] Preferably, a purification chamber is provided in the measuring chamber at the lower side of the measuring base, and the purification chamber is communicated with the gas outlet groove; The fixing hole is a through hole and communicates with the interior of the purification chamber; the fixing rod and the limiting rod are both tubular structures, and the interiors of the fixing rod and the limiting rod are communicated with the interiors of the fixing holes at the corresponding installation positions, and the side walls of the fixing rod and the limiting rod are evenly provided with purification holes.

[0010] Preferably, a flushing cavity is provided inside the measuring block on the upper side of the line laser sensor, the flushing cavity is communicated with the top of the adjustment hole, and flushing holes are provided at the end of the measuring block around the line laser sensor, the flushing holes are distributed in a ring shape around the line laser sensor, and the flushing holes are communicated with the inside of the flushing cavity, and the side wall of the flushing cavity is also provided with a supplementary air hole, and a one-way valve is provided inside the supplementary air hole.

[0011] Preferably, an umbrella-shaped protective plate is provided at the bottom of the line laser sensor, the vertical cross-section of the protective plate is an arc-shaped structure, and the vertical projection area of ​​the protective plate is larger than the vertical projection area of ​​the line laser sensor, and pressure alarm sensors are provided at the end of the edge part and the lower surface of the bottom of the protective plate.

[0012] Preferably, the end of the edge of the protective plate is bent upward, and a mounting rod is provided in the middle of the protective plate. The mounting rod is slidably embedded in the mounting hole provided in the middle of the line laser sensor, and the mounting rod is communicated with the interior of the flushing chamber, and the end of the mounting rod is connected to the inner wall of the flushing chamber through an elastic member.

[0013] Preferably, the mounting rod is a tubular structure, and the top opening of the mounting rod is communicated with the inside of the flushing chamber, and air outlet holes are evenly arranged at the bottom of the mounting rod, and the air outlet holes are inclined upward and point to the inner surface of the protective plate.

[0014] Preferably, guide plates are evenly arranged on the bottom surface of the protective plate, the guide plates are distributed in a ring shape around the mounting rod, and guide grooves are arranged at the top of the guide plate corresponding to the air outlet.

[0015] Preferably, the mounting rod and the protective plate are rotatably connected, and a driving motor is provided at the joint between the mounting rod and the protective plate, and an output end of the driving motor is connected to the protective plate.

[0016] The beneficial effects of the present invention are as follows: The multi-joint guide blade profile measurement reference platform of the present invention can reasonably arrange the distribution of multiple fixing rods according to the different sizes and contours of different workpieces to be measured, so as to realize the limit fixation of different types of non-standard workpieces. Compared with the existing separately designed special fixtures, the present application has a wider scope of application. After completing the limit of the workpiece to be measured, start the posture adjustment component to adjust the position of the moving seat and the measuring block. The line laser sensor on the measuring block releases the laser to contact the contour surface of the workpiece and then receives the reflected laser signal. The reflection angle and propagation time of the light signal and other data are sent to the analysis software to realize the calculation and collection of the three-dimensional contour information of the workpiece, and perform three-dimensional modeling of the workpiece, compare it with production requirements, and calculate the dimensional error of the workpiece processing; if the error is within the allowable range, it is judged as a qualified part. If the workpiece processing error exceeds the allowable range, it is judged as an unqualified part and needs to be re-processed in the range processing workshop. This improves the accuracy of workpiece quality inspection and ensures the pass rate of workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 is a stereogram of the present invention; Figure 2 is a schematic diagram of the interior of the measurement chamber of the present invention; Figure 3 It is a partial cross-sectional view of the present invention in the front view direction; Figure 4 It is a schematic diagram of the fixing rod in the present invention fixing and limiting the workpiece to be measured; Figure 5 is a three-dimensional diagram of a fixing rod in the present invention; Figure 6 It is a cross-sectional view of the measuring block and the fixing rod in the present invention when they are matched; Figure 7 yes Figure 6 A partial enlarged view of the middle A; Figure 8 It is a three-dimensional diagram of the protective plate in the present invention.

[0019] In the figure: measuring box 1, measuring chamber 11, measuring base 12, fixing hole 121, posture adjustment component 13, moving seat 131, air outlet groove 14, fixing rod 15, limiting rod 151, purification hole 152, purification chamber 16, measuring block 2, line laser sensor 21, propulsion device 22, adjustment hole 23, flushing chamber 24, flushing hole 241, supplementary air hole 242, protective plate 25, mounting rod 251, mounting hole 252, air outlet 253, guide plate 254, guide groove 255. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1:

[0022] As shown in the attached figure of the specification Figure 1-Figure 8 As shown, a multi-link guide blade profile measurement reference platform includes a measurement box 1, a measurement chamber 11 is arranged inside the measurement box 1, a measurement base 12 is arranged inside the measurement chamber 11, and an optical measurement system and a purification system are also arranged inside the measurement chamber 11; The optical measurement system includes a measurement block 2, on which a linear laser sensor 21 is provided. The measurement block 2 is mounted on a moving seat 131 of a posture adjustment assembly 13 inside the measurement chamber 11, so as to adjust the position and posture of the measurement block 2 inside the measurement chamber 11; The purification system includes a purification fan, the air outlet of the purification fan is connected to the inside of the measuring chamber 11, and the air outlet slot 14 at the bottom of the measuring box 1 is connected to the inside of the measuring chamber 11; the purification fan is started regularly to send the purified air from the outside into the inside of the measuring chamber 11, and then flows out through the bottom air outlet slot 14, so as to replace the internal air and reduce the adverse effects of external dust and processing debris adhered to the surface of the workpiece to be measured on the measurement process; The bottom surface of the measuring base 12 is evenly provided with fixing holes 121, and a fixing rod 15 is installed inside the fixing hole 121. An L-shaped limiting rod 151 is provided near the bottom of the fixing rod 15, and the length of the horizontal part of the limiting rod 151 is greater than the spacing between adjacent fixing holes 121; so that the rotating limiting rod 151 can cover the gap area between adjacent fixing holes 121, and can also play a contact limiting role for the part of the workpiece to be measured in the gap area; The bottom of the fixing rod 15 is slidably embedded in the fixing hole 121, and can be rotated and adjusted to achieve clamping and fixing of the workpiece to be measured, and then the fixing rod 15 is fixed and limited relative to the fixing hole 121; as for the specific fixing method, an electromagnet device can be set at the position where the bottom of the fixing rod 15 is embedded in the fixing hole 121, and the electromagnet device is started when fixing is required, and through magnetic fixation, the measuring base 12 which is also a magnetic adsorption device cooperates to achieve fixed limiting of the fixing rod 15.

[0023] Specific workflow: When it is necessary to measure the profile of a multi-joint guide vane workpiece, the existing technology mainly uses the standard template method and the three-coordinate machine detection method. This contact detection form not only has low detection efficiency and is difficult to adapt to the needs of mass production, but also has limited detection accuracy and is difficult to meet the production requirements of existing high-precision workpieces; therefore, this application uses optical measurement technology to achieve accurate measurement of the workpiece; Specifically, during the measurement process, the measuring chamber 11 is first opened to place the workpiece to be measured on the measuring base 12. Because the measuring base 12 can use an existing magnetic adsorption device such as a magnetic base, and is internally configured with an electromagnet device, it can achieve magnetic adsorption and fixation of the steel workpiece to be measured after startup, so that the workpiece to be measured is limited and fixed in the vertical direction; then, according to the shape of the workpiece to be measured, a plurality of fixing rods 15 are installed in the corresponding fixing holes 121 close to the contour of the workpiece to be measured, and the fixing rods 15 directly in contact with the workpiece to be measured are kept stationary, and the part of the fixing rods 15 that is not in direct contact with the workpiece to be measured is rotated and adjusted so that the vertical part of the limiting rods 151 installed side by side on the fixing rods 15 is rotated close to the workpiece to be measured and in close contact with the outer surface of the workpiece to be measured, so that the workpiece to be measured is clamped and fixed in multiple different directions on the outside, ensuring that the workpiece to be measured remains stable during the measurement process, thereby improving the measurement accuracy; Because the workpiece to be measured is a multi-jointed guide blade, which is composed of a plurality of blade conjoined bodies, a plurality of fixing rods 15 can also be installed in the surrounding area between the blade conjoined bodies to achieve the limit fixation of the multi-jointed guide blade from the inside; through the evenly distributed fixing holes 121, the present application can reasonably arrange the distribution of the plurality of fixing rods 15 according to the different sizes and contours of the workpieces to be measured, so as to achieve the limit fixation of different kinds of non-standard workpieces. Compared with the existing separately designed special fixtures, the present application has a wider scope of application; After completing the limit of the workpiece to be measured, start the posture adjustment component 13 to adjust the position of the moving seat 131 and the measuring block 2. The posture adjustment component 13 includes a moving slide rail and an electric slide in the prior art, so that the moving seat 131 drives the measuring block 2 to move in the three axes of X, Y, and Z inside the measuring chamber 11, so that the measuring block 2 can adjust its position around the workpiece to be measured at different positions after approaching the workpiece. At the same time, the line laser sensor 21 on the measuring block 2 releases the laser to contact the contour surface of the workpiece and then receives the reflected laser signal, and sends the reflection angle and propagation time of the light signal to the analysis software to realize the calculation and collection of the three-dimensional contour information of the workpiece, and perform three-dimensional modeling on the workpiece, compare it with the production requirements, and calculate the dimensional error of the workpiece processing; if the error is within the allowable range, it is judged as a qualified part, and if the workpiece processing error exceeds the allowable range, it is judged as an unqualified part and needs to be reprocessed in the range processing workshop, which improves the accuracy of workpiece quality inspection and ensures the qualified rate of the workpiece; After the measurement is completed, the magnetic function of the measuring base 12 is turned off, the workpiece to be measured can be directly pulled out vertically, and the next workpiece to be measured can be measured. If they belong to the same batch of workpieces with the same processing size, the distribution limit scheme of the same set of fixed rods 15 can be used. If workpieces of different sizes are replaced, the distribution of the fixed rods 15 can be flexibly adjusted, thereby achieving efficient adaptation to different workpieces to be measured and improving measurement efficiency.

[0024] Embodiment 2:

[0025] On the basis of the first embodiment, the output end of the propulsion device 22 on the posture adjustment component 13 is connected to the moving seat 131. The propulsion device 22 here can be an electric telescopic rod device, and a rotating device is provided at the joint between the moving seat 131 and the output end of the propulsion device 22. The rotating device here can be a motor device. The propulsion device 22 and the rotating device are both controlled by an external controller; the propulsion device 22 can control the moving seat 131 to drive the measuring block 2 to move in the vertical direction, and the rotating device can control the moving seat 131 to drive the measuring block 2 to rotate horizontally, thereby expanding the posture adjustment range of the measuring block 2, facilitating the measuring block 2 to adjust its own posture to detect the workpiece to be measured, and making the contour information collection of the workpiece to be measured more complete and efficient; An adjustment hole 23 is provided at the end of the measuring block 2 near the line laser sensor 21, and the aperture of the adjustment hole 23 is smaller than the aperture of the fixing rod 15; The opening of the adjustment hole 23 is conical, and the central axis of the adjustment hole 23 coincides with the central axis of the output end of the rotating device. The distance between the adjustment hole 23 and the line laser sensor 21 is smaller than the distance between the fixing rod 15 and the limiting rod 151 .

[0026] Specific workflow: On the basis of the specific workflow in Example 1, in order to facilitate a more comprehensive and accurate measurement of the complex surface contour of the workpiece to be measured, the line laser sensor 21 on the measuring block 2 is required to approach the surface of the workpiece to be measured for scanning and measurement, in order to ensure that the measuring block 2 can approach smoothly while remaining stable and can effectively avoid collision with the fixed rod 15 and the workpiece; control the measuring block 2 to move to the upper side of the fixed rod 15 that is not in direct contact with the workpiece, and then control the adjustment hole 23 on the measuring block 2 to align with the top of the fixed rod 15, control the propulsion device 22 to start and drive the measuring block 2 to move downward, so that the end of the fixed rod 15 slides and is embedded in the adjustment hole 23. At this time, the cooperation of the fixed rod 15 and the adjustment hole 23 limits the vertical downward movement process of the measuring block 2, so that the measuring block 2 maintains a stable moving trajectory during the downward movement process, and can also measure the workpiece to be measured during the downward movement process; When the rotating device is started, the measuring block 2 can be driven to rotate with the central axis of the adjustment hole 23 as the center, so as to more flexibly adjust the angle to scan and measure the workpiece to be measured; because the spacing between the fixed rod 15 and the limit rod 151 is set, the possibility of collision and damage between the measuring block 2 and the workpiece to be measured or the limit rod 151 when the measuring block 2 rotates to adjust the measuring posture can be reduced, and a relatively stable working platform is provided for the normal measurement of the line laser sensor 21; Furthermore, in order to facilitate the measurement of the inner wall of the narrow area surrounded by the blade bodies in the workpiece to be measured, the adjustment hole 23 of the control measuring block 2 cooperates with the fixed rod 15 located in the surrounding area, so that the measuring block 2 can be stably moved down to the inside of the surrounding area and scan and measure the inner wall of the surrounding area. In this way, the scanning measurement of the workpiece to be measured is more comprehensive and efficient, ensuring the quality of the finished workpiece to be measured.

[0027] Embodiment three:

[0028] On the basis of the second embodiment, a purification chamber 16 is provided inside the measuring chamber 11 at the lower side of the measuring base 12, and the purification chamber 16 is communicated with the air outlet slot 14. An air outlet fan can be provided inside the purification chamber 16, and the air inlet end of the air outlet fan points to the measuring base 12, and the air outlet end is communicated with the air outlet slot 14, so that the air flow inside the measuring chamber 11 is accelerated and drawn into the purification chamber 16, and then guided to the outside, so as to realize the renewal and purification of the air flow inside the measuring chamber 11; The fixing hole 121 is a through hole and communicates with the interior of the purification chamber 16; the fixing rod 15 and the limiting rod 151 are both tubular structures, and the interiors of the fixing rod 15 and the limiting rod 151 are both communicated with the interior of the fixing hole 121, and the side walls of the fixing rod 15 are evenly provided with purification holes 152, and the side walls of the vertical part of the limiting rod 151 and the top of the horizontal part are distributed with purification holes 152; A flushing chamber 24 is provided inside the measuring block 2 on the upper side of the line laser sensor 21, and the flushing chamber 24 is communicated with the top of the adjustment hole 23. A flushing hole 241 is provided at the end of the measuring block 2 around the line laser sensor 21. The flushing holes 241 are distributed in a ring shape around the line laser sensor 21, and the flushing holes 241 are communicated with the inside of the flushing chamber 24.

[0029] Specific workflow: Based on the specific workflow in the second embodiment, the workpiece to be measured is subjected to quality inspection after processing, and rework is required if the quality inspection fails. Therefore, the inspection station and the processing station are relatively close. There may be impurities such as processing debris that have not been cleaned up on the complex surface of the workpiece during the processing. These impurities may be brought into the measuring chamber 11 and may affect the normal measurement of the workpiece to be measured. Therefore, a purification fan is provided to purify the outside air to form a purified airflow which is sent into the measuring chamber 11. The purified airflow flushes various parts inside the measuring chamber 11 and the surface of the workpiece, takes away possible impurities and debris, and then flows from the fixing hole 121 into the purification chamber 16 on the lower side, and finally flows from the purification chamber 16 to the outside through the air outlet groove 14, so that the impurities and debris inside the measuring chamber 11 are continuously purified, ensuring the smooth progress of the optical measurement operation of the workpiece to be measured. By arranging the fixing hole 121 on the surface of the measuring base 12, the purified airflow can be caused to flow into the fixing hole 121 and simultaneously flush the workpiece to be measured located on the upper side of the measuring base 12, thereby removing debris and impurities that may adhere to the surface of the workpiece to be measured, thereby preventing these debris and impurities from affecting the scanning measurement of the complex surface of the workpiece to be measured; Furthermore, because the fixing rod 15 and the limiting rod 151 are both tubular structures and communicate with the inside of the fixing hole 121, the purification holes 152 on the surfaces of the fixing rod 15 and the limiting rod 151 that limit the workpiece to be measured can suck the air in the nearby area and bring it into the purification chamber 16. In this process, the air flow rate in the nearby area is accelerated, so that the surface of the workpiece to be measured that is close to the workpiece to be measured is scoured by the airflow caused by the air extraction, and the debris and impurities adhered to the surface of the workpiece to be measured are sucked into the fixing rod 15 or the limiting rod 151 nearby under the suction effect, so that the workpiece to be measured is cleaned more fully and can be measured in a better state, thereby further improving the measurement accuracy of the workpiece to be measured. When adjusting the position of the measuring block 2, the control line laser sensor 21 is rotated to the corresponding area between the fixed rod 15 and the limiting rod 151. At this time, the purification hole 152 on the side wall of the fixed rod 15 on one side, the purification hole 152 on the side wall of the vertical part of the limiting rod 151 on the other side, and the purification hole 152 on the horizontal part of the limiting rod 151 at the bottom surround the middle line laser sensor 21. The multi-directional airflow flushing action fully cleans the surface of the line laser sensor 21 to ensure the normal operation of the line laser sensor 21. Furthermore, during the downward movement of the measuring block 2, the end of the fixing rod 15 slides and fits into the adjustment hole 23, so that the air inside the adjustment hole 23 is squeezed and flows into the flushing chamber 24, and then flows out from the flushing hole 241 located around the line laser sensor 21 at the end of the measuring block 2. After the outflowing airflow flushes the surface of the line laser sensor 21, it is sucked in nearby by the purification holes 152 on the surrounding fixing rods 15 and the limiting rods 151, so that the surface of the line laser sensor 21 is fully flushed and cleaned, further ensuring the normal operation of the line laser sensor 21. In addition, a supplementary air hole 242 is provided on the side wall of the flushing chamber 24, a one-way valve is provided inside the supplementary air hole 242, and a filter is provided at the outer opening; during the upward resetting process of the measuring block 2, the negative pressure inside the flushing chamber 24 causes the outside air to flow out into the flushing chamber 24 through the supplementary air hole 242, while the one-way valve prevents the inside air from flowing from the supplementary air hole 242 to the outside, thereby ensuring that the flushing hole 241 releases the airflow to flush and clean the linear laser sensor 21; In addition, a micro air pump device can be arranged inside the flushing chamber 24. The air inlet end of the micro air pump device is connected to the supplementary air hole 242, and the air outlet end is connected to the inside of the flushing chamber 24. After startup, air flow can be continuously drawn in from the outside to supplement the inside of the flushing chamber 24. Because the end of the fixed rod 15 blocks the adjustment hole 23, the air flow can only flow out along the connected flushing hole 241, forming a continuous flushing airflow acting on the surface of the line laser sensor 21, thereby improving the purification and cleaning effect.

[0030] Embodiment 4:

[0031] On the basis of the third embodiment, an umbrella-shaped protective plate 25 is provided at the bottom of the line laser sensor 21, the cross section of the protective plate 25 is an arc-shaped structure, and the vertical projection area of ​​the protective plate 25 is larger than the vertical projection area of ​​the line laser sensor 21, and the edge ends of the protective plate 25 are evenly provided with pressure alarm sensors; The end of the edge of the protective plate 25 is bent upward, and a mounting rod 251 is set in the middle of the protective plate 25. The mounting hole 252 is slidably embedded in the mounting hole 252 set in the middle of the line laser sensor 21, and the mounting rod 251 extends upward into the flushing chamber 24. The end of the mounting rod 251 is connected to the inner wall of the flushing chamber 24 through an elastic member, and the elastic member here can be a spring.

[0032] Specific workflow: On the basis of the specific workflow in Example 3, as the position of the measuring block 2 is adjusted, in order to ensure the safety of the line laser sensor 21 on the measuring block 2, an umbrella-shaped protective plate 25 is provided at the bottom of the rod-shaped line laser sensor 21, and the edge end of the protective plate 25 extends outward, so that before the bottom of the line laser sensor 21 collides with other components due to operational errors during the downward movement of the measuring block 2, the bottom protective plate 25 is first hit before the line laser sensor 21, triggering the pressure alarm sensor therein and sending an alarm signal, and stopping further downward movement. At the same time, the protective plate 25 is pressed to drive the mounting rod 251 to pull the elastic part along the mounting hole 252 to deform, buffer the impact and then reset; similarly, during the horizontal movement process, the edge end of the protective plate 25 collides before the line laser sensor 21, and the edge end of the protective plate 25 is made of elastic material, thereby reducing the damage to the line laser sensor 21 and the protective plate 25 caused by the impact, and ensuring the normal progress of the measurement operation; In addition, the edge of the protective plate 25 is bent upward, and the airflow flowing downward from the flushing hole 241 contacts the upper surface of the protective plate 25. After the flow is blocked, it flows upward along the arc surface of the protective plate 25, and then flushes the surface of the line laser sensor 21 in the opposite direction, and collides with the downward-flowing airflow. The vibration of the airflow causes impurities that may be adhered to the surface of the line laser sensor 21 to fall off, and are sucked in by the suction action of the surrounding purification holes 152, thereby achieving sufficient purification of the line laser sensor 21.

[0033] Embodiment five:

[0034] On the basis of the fourth embodiment, the mounting rod 251 is a tubular structure, and the top opening of the mounting rod 251 is communicated with the inside of the flushing chamber 24, and the bottom of the mounting rod 251 is evenly provided with air outlet holes 253, which are inclined upward and point to the inner surface of the protective plate 25; The upper bottom surface of the protection plate 25 is evenly provided with guide plates 254, and the top of the guide plate 254 corresponding to the air outlet 253 is provided with a guide groove 255; The mounting rod 251 and the protection plate 25 are rotationally connected, and a driving motor is provided at the joint between the mounting rod 251 and the protection plate 25 . The output end of the driving motor is connected to the protection plate 25 , and the driving motor is controlled by an external controller.

[0035] Specific working process: On the basis of the specific working process in Example 4, because the mounting rod 251 is connected to the flushing chamber 24, part of the airflow flowing into the flushing chamber 24 impacts the mounting rod 251 to make it slide vertically, flows along the inside of the mounting rod 251 of the tubular structure and flows out laterally from the air outlet 253 set at the bottom of the mounting rod 251, and flushes the surface of the line laser sensor 21 from the bottom along the guide groove 255 on the guide plate 254; at the same time, you can also choose to start the driving motor to drive the protective plate 25 to rotate relative to the mounting rod 251, and the rotating protective plate 25 drives the upper guide plate 254 to rotate, which moves the air in the nearby area, and cooperates with the airflow with an upward flow trend released from the air outlet 253, thereby enhancing its upward impact strength and increasing its upward flow coverage, so that the surface of the line laser sensor 21 is more fully flushed.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-link guide blade profile measurement reference platform, comprising a measurement box (1), wherein a measurement chamber (11) is arranged inside the measurement box (1), a measurement base (12) is arranged at the bottom of the measurement chamber (11), and an optical measurement system and a purification system are also arranged inside the measurement chamber (11), characterized in that: The optical measurement system comprises a measurement block (2), a linear laser sensor (21) is arranged on the measurement block (2), and the measurement block (2) is mounted on a movable seat (131) of a position adjustment component (13) inside the measurement chamber (11), so as to adjust the position and posture of the measurement block (2) inside the measurement chamber (11); The purification system comprises a purification fan, the air outlet end of the purification fan is in communication with the interior of the measuring chamber (11), and the air outlet groove (14) at the bottom of the measuring box (1) is in communication with the interior of the measuring chamber (11); The upper bottom surface of the measuring base (12) is evenly provided with fixing holes (121), a fixing rod (15) is installed inside the fixing hole (121), an L-shaped limiting rod (151) is provided at a position close to the bottom of the fixing rod (15), and the length of the horizontal position of the limiting rod (151) is greater than the spacing between adjacent fixing holes (121).

2. A multi-joint guide blade profile measurement reference platform according to claim 1, characterized in that: The output end of the propulsion device (22) on the posture adjustment component (13) is connected to the moving seat (131), and a rotating device is provided at the joint between the moving seat (131) and the output end of the propulsion device (22), and both the propulsion device (22) and the rotating device are controlled by an external controller; An adjustment hole (23) is provided at a position of the end of the measuring block (2) close to the line laser sensor (21), and the diameter of the adjustment hole (23) is smaller than the diameter of the fixing rod (15).

3. A multi-link guide blade profile measurement reference platform according to claim 2, characterized in that: The opening of the adjustment hole (23) is conical, and the central axis of the adjustment hole (23) coincides with the central axis of the output end of the rotating device. The distance between the adjustment hole (23) and the line laser sensor (21) is smaller than the distance between the fixing rod (15) and the limiting rod (151).

4. The multi-link guide blade profile measurement reference platform according to claim 2, characterized in that: A purification chamber (16) is provided in the measuring chamber (11) at a lower area of ​​the measuring base (12), and the purification chamber (16) is communicated with the gas outlet groove (14); The fixing hole (121) is a through hole and communicates with the interior of the purification chamber (16); the fixing rod (15) and the limiting rod (151) are both tubular structures, and the interiors of the fixing rod (15) and the limiting rod (151) are both communicated with the interiors of the fixing hole (121) at the corresponding installation position; and the side walls of the fixing rod (15) and the limiting rod (151) are evenly provided with purification holes (152).

5. A multi-joint guide blade profile measurement reference platform according to claim 4, characterized in that: A flushing chamber (24) is provided inside the measuring block (2) on the upper side of the line laser sensor (21), the flushing chamber (24) being communicated with the top of the adjustment hole (23), and a flushing hole (241) is provided at the end of the measuring block (2) around the line laser sensor (21), the flushing holes (241) are distributed in an annular pattern around the line laser sensor (21), and the flushing holes (241) are communicated with the inside of the flushing chamber (24), and a supplementary air hole (242) is further provided on the side wall of the flushing chamber (24), and a one-way valve is provided inside the supplementary air hole (242).

6. A multi-joint guide blade profile measurement reference platform according to claim 5, characterized in that: An umbrella-shaped protective plate (25) is arranged at the bottom of the line laser sensor (21); the vertical cross-section of the protective plate (25) is an arc-shaped structure, and the vertical projection area of ​​the protective plate (25) is larger than the vertical projection area of ​​the line laser sensor (21); and pressure alarm sensors are arranged at the edge end and the bottom lower surface of the protective plate (25).

7. A multi-link guide blade profile measurement reference platform according to claim 6, characterized in that: The end of the edge of the protective plate (25) is bent upward, and a mounting rod (251) is provided in the middle of the protective plate (25), and the mounting rod (251) is slidably embedded in a mounting hole (252) provided in the middle of the line laser sensor (21), and the mounting rod (251) is communicated with the inside of the flushing chamber (24), and the end of the mounting rod (251) is connected to the inner wall of the flushing chamber (24) through an elastic member.

8. The multi-link guide blade profile measurement reference platform according to claim 7, characterized in that: The mounting rod (251) is a tubular structure, and the top opening of the mounting rod (251) is in communication with the interior of the flushing chamber (24). The bottom of the mounting rod (251) is evenly provided with air outlet holes (253), and the air outlet holes (253) are inclined upward and point to the inner surface of the protective plate (25).

9. The multi-link guide blade profile measurement reference platform according to claim 8, characterized in that: Guide plates (254) are evenly arranged on the bottom surface of the protective plate (25), the guide plates (254) are distributed in a ring shape around the mounting rod (251), and guide grooves (255) are arranged at the top of the guide plates (254) corresponding to the air outlet holes (253).

10. A multi-joint guide blade profile measurement reference platform according to claim 9, characterized in that: The mounting rod (251) and the protective plate (25) are rotatably connected, and a driving motor is provided at the joint between the mounting rod (251) and the protective plate (25), and the output end of the driving motor is connected to the protective plate (25).

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