A laser device for detecting the flatness of an ice or snow surface

Abstract

The application discloses a kind of ice and snow field flatness laser detection devices, belong to ice and snow field flatness detection equipment technical field, including detection box, the inside rotation of the detection box is installed with the left and right direction adjustment adjusting frame, the inside rotation of the adjusting frame is installed with the front and back direction adjustment leveling platform, the top end middle part of the leveling platform is installed with inclination sensor, the bottom of the leveling platform is fixedly installed with constant temperature box, the inside fixed connection of the constant temperature box is with support plate, the bottom of the support plate is fixedly installed with the laser triangulation sensor of linear array uniform distribution, the inner wall of the constant temperature box is fixedly installed with box body heating film and semiconductor refrigeration piece, the opening end of the constant temperature box bottom is fixedly installed with transparent optical glass, the present application has the technical effect of dynamic two-dimensional leveling during traveling, laser sensor centralized constant temperature protection, optical window active defrosting, multi-channel synchronous detection.

Description

Technical Field

[0001] This invention belongs to the technical field of ice and snow venue flatness testing equipment, and particularly relates to a laser testing device for ice and snow venue flatness. Background Technology

[0002] Ice and snow sports events have stringent requirements for the flatness of ice rinks and snow fields. Unevenness and defects in the field can directly affect the safety of athletes and the fairness of the competition. Therefore, it is necessary to use testing equipment to collect field elevation and conduct quantitative assessment of flatness. Laser triangulation, with its advantages of non-contact and high precision, has been gradually applied to the flatness detection of sports fields.

[0003] To address this, Chinese patent CN118007570B discloses a device and system for controlling the flatness of a compacted snow track surface based on laser leveling. The system includes a tracked mobile device with a compaction device at its front end and a laser leveling device at its bottom. The laser leveling device comprises a mounting balancing mechanism and a laser leveling assembly. Workers can control the height of the mounting connecting column by adjusting the height of the first servo motor, thereby adjusting the laser sensor's height and moving it away from the rolling drum. This allows the laser sensor to calibrate the thickness of the snow accumulation on the track. Furthermore, by controlling the angle of the mounting movable plate using a second servo motor, the tilt angle of the laser sensor can be adjusted. This enables the laser sensor to quickly match different slopes of the track surface and effectively avoids inaccurate track surface data acquisition due to the tilt of the laser sensor.

[0004] However, the aforementioned device has a laser sensor that lacks a low-temperature protection structure. In the low-temperature environment of ice and snow venues, the laser is prone to zero-point drift, and the lens is also prone to frost and fogging, which can cause optical path obstruction and distortion of distance measurement data. Furthermore, the balancing mechanism can only adjust the sensor installation tilt angle and cannot dynamically compensate for the lateral and longitudinal tilt generated during the vehicle's movement in real time, thus failing to continuously maintain the measurement reference level. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a laser detection device for the flatness of ice and snow fields. It has the advantages of dynamic two-dimensional leveling during movement, centralized constant temperature protection for laser sensors, active defrosting of optical windows, and multi-channel synchronous detection. It solves the problems of accuracy drift under low-temperature conditions, easy frosting of lenses, and inability to dynamically maintain the horizontal measurement benchmark in the prior art laser detection equipment.

[0006] This invention is implemented as follows: a laser detection device for the flatness of ice and snow surfaces includes a detection box. Inside the detection box, an adjustable frame capable of left-right adjustment is rotatably mounted. Inside the adjustable frame, a leveling platform capable of front-back adjustment is rotatably mounted. A tilt sensor is installed at the top center of the leveling platform. A constant temperature box is fixedly mounted at the bottom of the leveling platform. A support plate is fixedly connected inside the constant temperature box. Laser triangulation sensors arranged in a linear array are fixedly mounted at the bottom of the support plate. A heating film and a semiconductor cooling chip are fixedly mounted on the inner wall of the constant temperature box. A transparent optical glass is fixedly mounted at the open end of the bottom of the constant temperature box. A PLC controller is fixedly mounted on the front of the detection box.

[0007] As a preferred embodiment of the present invention, support legs are fixedly installed at the four corners of the testing box, and rollers are fixedly installed at the bottom of each support leg. A push handle is fixedly connected to the right side of the testing box, and a storage battery is fixedly installed at the lower part of the push handle. The storage battery and the PLC controller are electrically connected.

[0008] With this setup, the rollers and push handle make it easy for operators to move the entire machine around the ice and snow field for inspection. The battery enables the equipment to be powered independently without the need for external cables, improving the convenience of mobile operations in the field and venues.

[0009] As a preferred embodiment of the present invention, the detection box has a through-hole installation channel in the middle, the adjustment frame is located in the installation channel, the front and back of the adjustment frame are fixedly connected to the first rotating shaft, the ends of the first rotating shaft are respectively connected to the front and back surfaces of the installation channel through bearings, the top of the detection box has a groove, and a left and right flip motor is fixedly installed in the groove, the output end of the left and right flip motor is fixedly connected to the end of the first rotating shaft.

[0010] With this setting, the left and right flipping motor can drive the first rotating shaft to make the adjustment frame swing left and right, thereby adjusting the rolling direction posture and compensating for the left and right tilt deviation of the equipment.

[0011] As a preferred embodiment of the present invention, a front-to-back tilting motor is fixedly installed on the left and right outer walls of the adjustment frame, and a second rotating shaft is fixedly connected to both sides of the leveling platform. The ends of the second rotating shafts are respectively inserted into the left and right inner walls of the adjustment frame through bearings. The output end of the front-to-back tilting motor is fixedly connected to the end of the second rotating shaft. The front-to-back tilting motor and the left-to-right tilting motor are all electrically connected to the PLC controller.

[0012] With this setup, the forward and backward tilting motor can drive the second rotating shaft, causing the leveling platform to swing back and forth relative to the adjustment frame, thereby achieving pitch attitude adjustment; combined with the left and right swing of the adjustment frame, it forms a dual-axis two-dimensional leveling structure that can simultaneously compensate for lateral and longitudinal tilt.

[0013] In a preferred embodiment of the present invention, the tilt sensor, the laser triangulation distance sensor, the housing heating film, and the semiconductor cooling chip are all electrically connected to the PLC controller.

[0014] With this setting, the PLC controller can uniformly collect tilt angle signals and distance measurement signals, and simultaneously output control signals to drive temperature control components, thereby achieving centralized signal processing and closed-loop control.

[0015] As a preferred embodiment of the present invention, a defrosting heating film is fixedly installed on the bottom of the transparent optical glass. The defrosting heating film is arranged around the periphery of the laser triangulation rangefinder array. Both the defrosting heating film and the housing heating film are polyimide heating films. The defrosting heating film is electrically connected to the PLC controller.

[0016] With this setup, the defrosting heating film can evenly heat the outer surface of the transparent optical glass, eliminating condensation and water mist caused by the temperature difference between the inside and outside of the box, and the reserved light-transmitting area in the middle will not block the laser beam; the two types of polyimide heating films have clear functions, the box heating film is used to heat the inner cavity of the constant temperature box, and the defrosting heating film is specifically used to defog the window.

[0017] As a preferred embodiment of the present invention, a temperature sensor is also fixedly installed on the inner wall of the constant temperature box, and the temperature sensor is electrically connected to the PLC controller.

[0018] With this setup, the temperature sensor collects the ambient temperature inside the constant temperature box in real time, and the PLC controller controls the heating film and semiconductor cooling chip in the box to start and stop according to the temperature signal, forming a closed-loop control of the internal constant temperature.

[0019] As a preferred embodiment of the present invention, each of the laser triangulation rangefinders is fixedly connected to a hanging plate on its top outer shell, and the hanging plate is fixedly connected to the support plate by bolts.

[0020] With this setup, the laser triangulation rangefinder is fixed by hanging plate, making it easy to install and remove, facilitating individual inspection and replacement of the sensor, and allowing for flexible adjustment of the array spacing.

[0021] Compared with existing technologies, the beneficial effects of this invention are as follows: Through a two-dimensional dynamic leveling mechanism, the tilt sensor collects the platform's tilt signal in real time, and the PLC controller controls the left and right tilting motors and the front and rear tilting motors to coordinate their actions, correcting the platform's posture in real time during movement, continuously ensuring that the laser sensor's measurement reference is in a horizontal state, eliminating elevation measurement errors caused by the bumps and tilting of the vehicle; all laser triangulation sensors are uniformly arranged inside a constant-temperature box, relying on the box's heating film and semiconductor cooling chip to achieve constant temperature within the cavity, ensuring that multiple sets of sensors are in the same temperature environment, avoiding laser parameter drift caused by low temperatures, and improving the consistency of multi-channel detection data; a defrosting heating film is configured on the bottom surface of the transparent optical glass to specifically eliminate the problem of frost and fogging on the optical window, ensuring smooth laser emission and reflection light paths, and adapting to the harsh working conditions of low temperature and high humidity in ice and snow venues; multiple sets of laser sensors are arranged in a linear array, simultaneously collecting multiple cross-sectional elevation data in a single pass, reducing the risk of missed detection of potholes and protrusions in ice and snow venues; this device adopts a trolley-type independent structure, which is compact and suitable for flexible mobile inspection operations in indoor ice rinks and outdoor snow fields. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the bottom structure provided in an embodiment of the present invention; Figure 3 This is a cross-sectional structural schematic diagram provided in an embodiment of the present invention; Figure 4 This is a schematic diagram showing the inner surface structure during disassembly provided in an embodiment of the present invention; Figure 5 This is a schematic diagram showing the outer surface structure during disassembly according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the support plate structure provided in an embodiment of the present invention.

[0023] In the diagram: 1. Detection box; 101. Support leg; 102. Push handle; 103. Installation channel; 104. Groove; 2. Adjustment frame; 201. First rotating shaft; 202. Left and right tilting motor; 3. Leveling platform; 301. Second rotating shaft; 302. Front and rear tilting motor; 303. Tilt sensor; 4. Constant temperature box; 401. Box heating film; 402. Semiconductor cooling chip; 403. Temperature sensor; 5. Transparent optical glass; 501. Defrosting heating film; 6. Laser triangulation distance sensor; 601. Hanging plate; 602. Support plate; 7. PLC controller; 8. Battery. Detailed Implementation

[0024] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0025] The structure of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] refer to Figures 1 to 6 As shown in the figure, an embodiment of the present invention provides a laser detection device for the flatness of ice and snow venues, including a detection box 1. An adjustment frame 2 that can be adjusted in the left and right direction is rotatably installed inside the detection box 1. A leveling platform 3 that can be adjusted in the front and back direction is rotatably installed inside the adjustment frame 2. An angle sensor 303 is installed at the top center of the leveling platform 3. A constant temperature box 4 is fixedly installed at the bottom of the leveling platform 3. A support plate 602 is fixedly connected inside the constant temperature box 4. A laser triangulation distance sensor 6 that is linearly arrayed and uniformly distributed is fixedly installed at the bottom of the support plate 602. A box heating film 401 and a semiconductor cooling chip 402 are fixedly installed on the inner wall of the constant temperature box 4. A transparent optical glass 5 is fixedly installed at the open end of the bottom of the constant temperature box 4. A PLC controller 7 is fixedly installed on the front of the detection box 1.

[0027] Specifically, support legs 101 are fixedly installed at the four corners of the testing box 1, and rollers are fixedly installed at the bottom of each support leg 101. A push handle 102 is fixedly connected to the right side of the testing box 1, and a storage battery 8 is fixedly installed at the lower part of the push handle 102. The storage battery 8 is electrically connected to the PLC controller 7.

[0028] Using the above solution, the rollers and push handle 102 make it easy for operators to move the whole machine around the ice and snow field for inspection. The battery 8 enables the equipment to be powered independently without the need for external cables, which improves the convenience of the equipment for mobile operation in the field and in the venue.

[0029] Specifically, the detection box 1 has a through-hole installation channel 103 in the middle, the adjustment frame 2 is located in the installation channel 103, and the front and back of the adjustment frame 2 are fixedly connected to the first rotating shaft 201. The ends of the first rotating shaft 201 are respectively connected to the front and back surfaces of the installation channel 103 through bearings. The top of the detection box 1 has a groove 104, and a left-right flipping motor 202 is fixedly installed in the groove 104. The output end of the left-right flipping motor 202 is fixedly connected to the end of the first rotating shaft 201.

[0030] Using the above scheme, the left and right flipping motor 202 can drive the first rotating shaft 201 to make the adjustment frame 2 swing left and right as a whole, so as to realize the attitude adjustment in the rolling direction and compensate for the left and right tilt deviation of the equipment.

[0031] Specifically, a front-to-back tilting motor 302 is fixedly installed on the left and right outer walls of the adjustment frame 2, and a second rotating shaft 301 is fixedly connected to both sides of the leveling platform 3. The ends of the second rotating shaft 301 are respectively inserted into the left and right inner walls of the adjustment frame 2 through bearings. The output end of the front-to-back tilting motor 302 is fixedly connected to the end of the second rotating shaft 301. The front-to-back tilting motor 302 and the left-to-right tilting motor 202 are all electrically connected to the PLC controller 7.

[0032] Using the above scheme, the front and rear tilting motor 302 can drive the second rotating shaft 301, causing the leveling platform 3 to swing back and forth relative to the adjustment frame 2, thereby achieving pitch attitude adjustment; combined with the left and right swing of the adjustment frame 2, a dual-axis two-dimensional leveling structure is formed, which can simultaneously compensate for lateral and longitudinal tilt.

[0033] Specifically, the tilt sensor 303, the laser triangulation rangefinder 6, the housing heating film 401, and the semiconductor cooling chip 402 are all electrically connected to the PLC controller 7.

[0034] Using the above scheme, the PLC controller 7 uniformly collects tilt angle signals and distance measurement signals, and simultaneously outputs control signals to drive temperature control components, thereby realizing centralized signal processing and closed-loop control.

[0035] Specifically, a defrosting heating film 501 is fixedly installed on the bottom of the transparent optical glass 5. The defrosting heating film 501 is arranged around the periphery of the laser triangulation range sensor 6 array. Both the defrosting heating film 501 and the box heating film 401 are polyimide heating films. The defrosting heating film 501 is electrically connected to the PLC controller 7.

[0036] Using the above solution, the defrosting heating film 501 facilitates uniform heating of the outer surface of the transparent optical glass 5, eliminating condensation and water mist caused by the temperature difference between the inside and outside of the box, and the reserved light-transmitting area in the middle will not block the laser beam; the two types of polyimide heating films have clear division of labor, the box heating film 401 is used for heating the inner cavity of the constant temperature box 4, and the defrosting heating film 501 is specifically used to defog the window.

[0037] Specifically, a temperature sensor 403 is also fixedly installed on the inner wall of the constant temperature box 4, and the temperature sensor 403 is electrically connected to the PLC controller 7.

[0038] Using the above scheme, the temperature sensor 403 collects the internal ambient temperature of the constant temperature box 4 in real time, and the PLC controller 7 controls the heating film 401 and the semiconductor cooling chip 402 of the box to start and stop according to the temperature signal, forming a closed-loop control of the internal constant temperature.

[0039] Specifically, each of the laser triangulation rangefinders 6 has a mounting plate 601 fixedly connected to its top outer shell, and the mounting plate 601 is fixedly connected to the support plate 602 by bolts.

[0040] Using the above scheme, the laser triangulation range sensor 6 is fixed by the hanging plate 601, which is convenient to disassemble and install, and facilitates individual inspection and replacement of the sensor. The array spacing can be flexibly adjusted.

[0041] Working principle of the invention: During use, the operator holds the push handle 102 to push the device along the ice and snow field at a constant speed for inspection. The tilt sensor 303 collects the horizontal and vertical tilt angle signals of the leveling platform 3 in real time and transmits them to the PLC controller 7. The PLC controller 7 outputs control signals according to the tilt deviation, driving the left and right tilting motors 202 and the front and back tilting motors 302 to run respectively. The left and right tilting motors 202 drive the adjustment frame 2 to swing left and right to correct the roll direction, and the front and back tilting motors 302 drive the leveling platform 3 to swing back and forth relative to the adjustment frame 2 to correct the pitch direction. This forms a dual-axis closed-loop dynamic leveling, continuously ensuring that the leveling platform 3 and the constant temperature box 4 maintain a horizontal reference, eliminating measurement errors caused by the bumps and tilts of the device being pushed. At the same time, the temperature sensor 403 monitors the internal temperature in real time and feeds it back to the PLC controller 7. When the temperature inside the constant temperature box 4 is lower than the set working range, the PLC controller 7 starts the box heating. Membrane 401 heats the interior of the constant temperature box 4. When the temperature exceeds the set range, the semiconductor cooling chip 402 is activated to cool the interior, ensuring that all laser triangulation sensors 6 are kept in a stable constant temperature environment to prevent laser parameter drift and measurement accuracy degradation caused by low temperatures. At the same time, PLC controller 7 controls the defrosting heating membrane 501 to work continuously, uniformly heating the outer surface of the transparent optical glass 5 to suppress condensation and water mist caused by temperature differences between the inside and outside of the box, ensuring unobstructed laser light path. Multiple sets of laser triangulation sensors 6 emit laser beams downwards, which pass through the transparent optical glass 5 and are projected onto the surface of the ice and snow field. Based on the principle of laser triangulation, the vertical elevation data from the sensor to the ice and snow surface is acquired in real time and transmitted to PLC controller 7. PLC controller 7 collects continuous elevation data from measurement points and calculates indicators such as the cross-sectional elevation difference and flatness deviation of the field, completing the continuous detection of the flatness of the ice and snow field.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser testing device for the flatness of ice and snow surfaces, comprising a testing box (1), characterized in that: The detection box (1) is equipped with an adjustable frame (2) that can be adjusted left and right. The adjustable frame (2) is equipped with a leveling platform (3) that can be adjusted forward and backward. The top center of the leveling platform (3) is equipped with an angle sensor (303). The bottom of the leveling platform (3) is fixedly equipped with a constant temperature box (4). The inside of the constant temperature box (4) is fixedly connected with a support plate (602). The bottom of the support plate (602) is fixedly equipped with a laser triangulation distance sensor (6) that is uniformly distributed in a linear array. The inner wall of the constant temperature box (4) is fixedly equipped with a box heating film (401) and a semiconductor cooling chip (402). The opening at the bottom of the constant temperature box (4) is fixedly equipped with transparent optical glass (5). The front of the detection box (1) is fixedly equipped with a PLC controller (7).

2. The laser detection device for the flatness of ice and snow surfaces as described in claim 1, characterized in that: Support legs (101) are fixedly installed at the four corners of the test box (1), and rollers are fixedly installed at the bottom of the support legs (101). A push handle (102) is fixedly connected to the right side of the test box (1), and a storage battery (8) is fixedly installed at the lower part of the push handle (102). The storage battery (8) is electrically connected to the PLC controller (7).

3. The laser detection device for the flatness of ice and snow venues as described in claim 1, characterized in that: The detection box (1) has an installation channel (103) through the middle. The adjustment frame (2) is located in the installation channel (103). The front and back of the adjustment frame (2) are fixedly connected to the first rotating shaft (201). The ends of the first rotating shaft (201) are respectively connected to the front and back surfaces of the installation channel (103) through bearings. The top of the detection box (1) has a groove (104). A left and right flip motor (202) is fixedly installed in the groove (104). The output end of the left and right flip motor (202) is fixedly connected to the end of the first rotating shaft (201).

4. The laser detection device for the flatness of ice and snow surfaces as described in claim 3, characterized in that: The left and right outer walls of the adjustment frame (2) are fixedly equipped with front and rear tilting motors (302), and the two sides of the leveling platform (3) are fixedly connected with second rotating shafts (301). The ends of the second rotating shafts (301) are respectively inserted into the left and right inner walls of the adjustment frame (2) through bearings. The output end of the front and rear tilting motors (302) is fixedly connected to the end of the second rotating shafts (301). The front and rear tilting motors (302) and the left and right tilting motors (202) are all electrically connected to the PLC controller (7).

5. The laser detection device for the flatness of ice and snow surfaces as described in claim 1, characterized in that: The tilt sensor (303), laser triangulation distance sensor (6), box heating film (401), and semiconductor cooling chip (402) are all electrically connected to the PLC controller (7).

6. The laser detection device for the flatness of ice and snow surfaces as described in claim 5, characterized in that: A defrosting heating film (501) is fixedly installed at the bottom of the transparent optical glass (5). The defrosting heating film (501) is arranged around the periphery of the laser triangulation range sensor (6) array. Both the defrosting heating film (501) and the box heating film (401) are polyimide heating films. The defrosting heating film (501) is electrically connected to the PLC controller (7).

7. The laser detection device for the flatness of ice and snow venues as described in claim 1, characterized in that: A temperature sensor (403) is also fixedly installed on the inner wall of the constant temperature box (4), and the temperature sensor (403) is electrically connected to the PLC controller (7).

8. The laser detection device for the flatness of ice and snow surfaces as described in claim 1, characterized in that: Each of the laser triangulation rangefinders (6) has a mounting plate (601) fixedly connected to its top outer shell, and the mounting plate (601) is fixedly connected to the support plate (602) by bolts.

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