A device for measuring the levelness of a long object and a method of using the same

Abstract

The application discloses a device for measuring the levelness of a long object and a use method thereof. The device comprises a trolley and a measuring device. The trolley comprises a trolley frame, and front and rear wheels arranged at the bottom of the trolley frame. The measuring device comprises a semicircular transparent sealing cover arranged on the trolley frame, a power supply, a sensitive ammeter, a processor, and first and second rotation angle sensors arranged on the front and rear wheels and connected to the processor. The semicircular transparent sealing cover is filled with insulating liquid, and the inner side of the semicircular transparent sealing cover is provided with a semicircular sliding resistor. A rotatable metal float needle is arranged at the center of the semicircular sliding resistor. A sliding ring in contact with the semicircular sliding resistor is arranged on the front side of the metal float needle. An air float ball is arranged at the front end of the metal float needle. The semicircular sliding resistor, the end of the metal float needle, the sensitive ammeter and the power supply form a loop, and the sensitive ammeter is connected to the processor. The application can quickly measure the levelness of a long object, reduces the input of manpower and material resources, improves work efficiency, and reduces equipment maintenance costs.

Description

Technical Field

[0001] This invention belongs to the field of measuring instrument and equipment technology, and in particular relates to a device for measuring the levelness of a long object and its method of use. Background Technology

[0002] Currently, many steel mills' hot rolling production lines contain numerous large objects, such as overhead crane tracks, large instrument tracks, medium and heavy plates, roughing plates, object placement platforms, and steel pushing platforms. These are all long objects with high leveling requirements, necessitating periodic leveling measurements for various reasons. For these large objects, the methods for measuring leveling are limited. Conventional methods include: one is for workers to use a spirit level placed at different locations to check the level, yielding a general conclusion; another is to use elevation measuring instruments, requiring several people to work together to obtain a reliable conclusion through detailed measurements, but this is time-consuming and labor-intensive; and there is the current laser leveling method, but it is limited by site and space, cannot be used anytime and anywhere, and is expensive. Each of these methods has its drawbacks, and there is an urgent need for a simple and effective method and device for measuring the levelness of object surfaces.

[0003] A search revealed CN102809369A, which discloses a levelness detection device. This device includes a transparent cuboid base with a sealed water storage chamber inside. The water storage chamber contains water, and two sealed left and right scale chambers are located on either side of the water storage chamber. Both chambers are hollow cavities with graduations on their surfaces. The upper parts of the left and right scale chambers are connected by an upper connecting pipe, and the lower parts are connected to the water storage chamber by a lower connecting pipe. This levelness detection device uses the water level difference between the left and right scale chambers and the distance between them to obtain the tangent function of the tilt angle of the detection surface, thus calculating the tilt angle. However, when used for leveling longer objects, this device still requires manual placement at various locations, manual observation of scale changes, recording, and calculation, which is time-consuming and laborious, and only yields a general conclusion. Summary of the Invention

[0004] In view of the technical problems existing in the background art, such as inconvenience in measuring the levelness of the surface of long objects, general measurement results, time and labor costs, and high costs, the present invention provides a device and method for measuring the levelness of long objects. It can achieve the purpose of quickly measuring the levelness of long objects, reduce the consumption of personnel and time, effectively improve work efficiency, and significantly reduce equipment maintenance costs.

[0005] The technical solution of this invention to solve the technical problem is as follows:

[0006] The present invention provides a device for measuring the levelness of a long object, comprising:

[0007] The vehicle includes a frame with front and rear wheels respectively located on the bottom front and rear sides of the frame; and a measuring device including a semi-circular transparent sealing cover, a power supply, a sensitive galvanometer, a processor, and a first and second rotation angle sensors respectively located on the front and rear wheels and connected to the processor. The semi-circular transparent sealing cover is filled with insulating liquid and has a semi-circular sliding resistor inside. A rotatable metal float is rotatably mounted at the center of the semi-circular sliding resistor. A slip ring is located at the front of the rotatable metal float, which contacts the semi-circular sliding resistor, and an air float is located at its front end. One end of the semi-circular sliding resistor, the end of the rotatable metal float, the positive and negative terminals of the sensitive galvanometer and the power supply form a circuit. The sensitive galvanometer is connected to the processor via a circuit.

[0008] Furthermore, the semi-circular transparent sealing cover is a flat semi-circular shape.

[0009] Furthermore, the semi-circular transparent sealing cover is made of glass.

[0010] Furthermore, the power source is a rechargeable battery or a non-rechargeable battery.

[0011] Furthermore, the front and rear wheels of the vehicle are made of stainless steel.

[0012] Furthermore, a display is connected to the processor.

[0013] The method of using the device for measuring the levelness of a long object as described in the above technical solution includes:

[0014] Place the device on the surface of the long object, turn on the power, and push the trolley from the starting position to the ending position.

[0015] The current value of the vehicle during its movement is acquired in real time by a sensitive galvanometer, and the data is transmitted to the processor.

[0016] The first rotation angle sensor and the second rotation angle sensor acquire the sensing data of the front wheel and the rear wheel of the car in real time and synchronously, respectively, and transmit the data to the processor.

[0017] The processor converts the real-time current value of the sensitive galvanometer into the real-time resistance value of the semi-circular sliding resistor, and obtains the offset angle of the swingable metal float relative to the vertical direction based on the resistance value.

[0018] The processor calculates the distance the car travels based on real-time sensor data from the front and rear wheels of the car.

[0019] Based on the real-time offset angle of the swingable metal float relative to the vertical direction calculated by the processor and the real-time moving distance of the trolley, the levelness information of the surface of the longer object is obtained.

[0020] Furthermore, the processor will correlate the real-time offset angle of the swingable metal float relative to the vertical direction with the real-time moving distance of the trolley, and display it in a graph form.

[0021] Compared with the prior art, the device and method for measuring the levelness of a long object described in this invention have the following advantages:

[0022] (1) The device for measuring the levelness of a long object described in this invention has a simple and novel structure, is easy to manufacture and use, and its components are made of common materials or parts, resulting in low cost and good application effect.

[0023] (2) The device for measuring the levelness of a long object described in this invention, along with its usage method, allows a single person to push the device from the starting position to the ending position to complete the measurement task, making the measurement of the levelness of a long object simple and practical.

[0024] (3) The device and its method for measuring the levelness of a long object described in this invention are ingeniously conceived. In the process of measuring the levelness of a long object, the device utilizes the rotation of a swingable metal float at the position where the levelness is problematic, causing the slip ring on it to change its contact position with the semi-circular sliding resistor, thereby changing the resistance value. The current value is obtained by a sensitive galvanometer and sent to the processor for processing. The processor can calculate the real-time offset angle of the swingable metal float relative to the vertical direction based on the current value, and obtain the levelness information at that position. At the same time, the real-time sensing data of the first rotation angle sensor and the second rotation angle sensor are used to calculate the position of the trolley and the levelness information at each position, thereby obtaining the levelness information of the entire surface of the long object. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the quick-change auxiliary device for the laser of the hot-rolled flatness instrument described in this invention during use;

[0026] Figure 2 It is a horizontal curve diagram of the surface of a relatively long object;

[0027] In the diagram: 1. Cart frame; 2. Semi-circular transparent sealing device; 3. Air float; 4. Semi-circular sliding resistor; 5. Slip ring; 6. Swinging metal float; 7. Power supply; 81. Cart front wheel; 82. Cart rear wheel; 9. First rotation angle sensor; 10. Second rotation angle sensor; 11. Sensitive galvanometer; 12. Processor; 13. Display. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The terms “upper,” “lower,” “left,” “right,” “front,” and “back,” as used in this patent application specification and claims, are used only to indicate relative positional relationships; these relative positional relationships change accordingly when the absolute position of the described object changes. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. All aspects not detailed herein are well-known to those skilled in the art.

[0030] Example 1:

[0031] like Figure 1 As shown, an apparatus for measuring the levelness of a long object includes a trolley and a measuring device.

[0032] The trolley serves as the carrier for all components of the entire device. It includes a trolley frame 1, with a front wheel 81 and a rear wheel 82 respectively located on the front and rear sides of the bottom of the trolley frame 1. The trolley frame 1 and the front and rear wheels 81 and 82 at its bottom propel the trolley to move across the surface of a long object, allowing for the measurement of the surface's levelness. The front and rear wheels 81 and 82 can be made of stainless steel or other hard metals to ensure no elastic deformation during movement, thus preventing interference with the levelness measurement. Both wheels are the same size, with a radius of L. The physical length of one revolution of the wheel can be calculated using the mathematical formula (circumference = 2πL).

[0033] The measuring device includes a semi-circular transparent sealing cover 2 mounted on the trolley frame 1, a power supply 7, a sensitive galvanometer 11, a processor 12, and a first rotation angle sensor 9 and a second rotation angle sensor 10 respectively mounted on the central axis of the front wheel 81 and the rear wheel 82 of the trolley and connected to the processor 12. The processor 12 is used to acquire and process the real-time current value of the sensitive galvanometer 11 and the real-time rotation angle data of the first rotation angle sensor 9 and the second rotation angle sensor 10. The semi-circular transparent sealing cover 2 can be made of glass or plastic, preferably a flat semi-circular shape with a certain thickness to facilitate the installation of other components. The line connecting the centers of the front wheel 81 and the rear wheel 82 of the trolley must be parallel to the plane of the semi-circular transparent sealing cover 2 to ensure that the trolley and wheels are integrated and initially horizontal. The power supply 7 can be a rechargeable or non-rechargeable battery, such as a 5V dry cell battery. The sensitive galvanometer 11 is a component used in laboratory testing of weak currents or small voltages in DC circuits; it is a highly sensitive magnetoelectric instrument capable of measuring 10^ -7 ~10^ -12A has a tiny current; the first rotation angle sensor 9 and the second rotation angle sensor 10 are used to acquire the rotation angle data of the front wheel 81 and the rear wheel 82 of the trolley, respectively, and send them to the processor 12 for calculation. The semi-circular transparent sealing cover 2 is filled with a light insulating liquid with a density close to that of water; a semi-circular sliding resistor 4 is set inside the semi-circular transparent sealing cover 2 and fixed in the middle position, with a resistance value that can be set to R; a swingable metal float 6 is rotatably set at the center of the semi-circular transparent sealing cover 2, and a slip ring 5 is set in front of the swingable metal float 6 to contact the semi-circular sliding resistor 4. An air float 3 is set at the front end of the float 6. One end of the semi-circular sliding resistor 4, the end of the swingable metal float 6, the sensitive galvanometer 11 and the positive and negative terminals of the power supply 7 form a circuit. The sensitive galvanometer 11 is connected to the processor 12 through a line. The oscillable metal float 6, air float 3, and slip ring 5 can be designed as a single unit. Under the influence of buoyancy, the air float 3 is always perpendicular to the horizontal plane and points in a certain direction. Under the influence of buoyancy, when the level changes, the air float 3 drives the oscillable metal float 6 to change accordingly, which in turn drives the slip ring 5 to slide left or right on the semi-circular sliding resistor 4. Different resistor contact points form different resistance values ​​in the circuit loop, and different resistance values ​​form different current values ​​under the fixed power supply voltage 7. The sensitive galvanometer 11 obtains the current value in the circuit in real time and transmits it to the processor 12 for processing in real time. When processor 12 performs leveling, it collects current signals and wheel angle rotation signals from the circuit loop at the same sampling frequency. The change in resistance can be calculated from the current signals. The resistance of the entire semi-circular sliding resistor 4 is R. The semi-circular design is divided into 180° sections, with each degree having a resistance of R / 180. When the resistance is R / 2, it indicates that the air float 3 is in the center position, with a leveling of 0. The current value at this position is: voltage (e.g., 5V) / resistance (R / 2). Processor 12 calculates this current value to represent the leveling position. The left and right deflection of the swinging metal float 6 follows the same calculation principle. For example, if the float deflects 1° to the left, it means the right wheel is lower and the left wheel is higher. At this time, the resistance value is 91R / 2. The obtained circuit current value is: voltage (e.g., 5V) / resistance (91R / 180). The processor calculates that the float needle is offset to the left by 1°, which means that the object surface is 1° lower than the horizontal level. After obtaining the horizontal angle of the object, the corresponding position information is also needed. The rotation angle sensor signal of the wheel needs to be calculated. The processor 12 synchronously collects the sensor signals of the first rotation angle sensor 9 and the second rotation angle sensor 10. The signal acquisition is only valid when the two wheels move together at the same time. Through the collected angle signal, the corresponding wheel circumference can be obtained in the processor to obtain the distance the wheel has moved. After obtaining the distance and the horizontality of the object at this distance, a horizontal angle coordinate curve of the longer object surface can be drawn, thereby completing the measurement operation.

[0034] In order to display the levelness information of the surface of a longer object, a display 13 can also be connected to the processor 12 to display the acquired current information, rotation angle information, and the horizontal angle coordinate curve of the surface of the longer object.

[0035] Example 2

[0036] like Figure 1 and Figure 2 As shown in Example 1, the method of using a device for measuring the levelness of a long object includes:

[0037] Place the device on the surface of a long object, turn on the power supply 7, and push the trolley from the starting position to the end position.

[0038] The current value of the car during its movement is acquired in real time by the sensitive galvanometer 11 and the data is transmitted to the processor 12.

[0039] The sensor data of the front wheel 81 and the rear wheel 82 of the car are acquired in real time by the first rotation angle sensor 9 and the second rotation angle sensor 10 respectively, and the data is transmitted to the processor 12.

[0040] The processor 12 converts the real-time current value of the sensitive galvanometer 11 into the real-time resistance value of the semi-circular sliding resistor 4, and obtains the offset angle of the swingable metal float 6 relative to the vertical direction based on the resistance value.

[0041] The processor 12 calculates the distance the car moves based on the real-time sensor data of the car's front wheel 81 and rear wheel 82.

[0042] Based on the real-time offset angle of the swingable metal float 6 relative to the vertical direction calculated by the processor 12 and the real-time moving distance of the trolley, the levelness information of the surface of the longer object is obtained.

[0043] In this embodiment, the processor 12 can correlate the real-time calculated offset angle of the swingable metal float 6 relative to the vertical direction with the real-time moving distance of the trolley to form a horizontal curve, which is then displayed on the screen in chart form. Figure 2 As shown, it can be clearly seen that the trolley moved a distance of about 10 meters. At this distance, the levelness of the object's surface is slightly uneven. This levelness curve is intuitive and clear, which can provide convenience for measurement work.

Claims

1. A device for measuring the levelness of a long object, characterized in that, include: The vehicle includes a vehicle frame (1), with a front wheel (81) and a rear wheel (82) respectively disposed on the front and rear sides of the bottom of the vehicle frame (1); and The measuring device includes a semi-circular transparent sealing cover (2) set on the trolley frame (1), a power supply (7), a sensitive galvanometer (11), a processor (12), and a first rotation angle sensor (9) and a second rotation angle sensor (10) respectively set on the front wheel (81) and the rear wheel (82) of the trolley and connected to the processor (12). The semi-circular transparent sealing cover (2) is filled with insulating liquid, and a semi-circular sliding resistor (4) is set on its inner side. A swingable metal float (6) is rotatably set at its center. A slip ring (5) is set on the front side of the swingable metal float (6) and contacts the semi-circular sliding resistor (4). An air float (3) is set at its front end. One end of the semi-circular sliding resistor (4), the end of the swingable metal float (6), the positive and negative poles of the sensitive galvanometer (11) and the power supply (7) form a circuit. The sensitive galvanometer (11) is connected to the processor (12) through a line.

2. The device for measuring the levelness of a long object according to claim 1, characterized in that, The semi-circular transparent sealing cover (2) is a flat semi-circular shape.

3. The device for measuring the levelness of a long object according to claim 1 or 2, characterized in that, The semi-circular transparent sealing cover (2) is made of glass.

4. The device for measuring the levelness of a long object according to claim 1, characterized in that, The power source (7) is a rechargeable battery or a non-rechargeable battery.

5. The device for measuring the levelness of a long object according to claim 1, characterized in that, The front wheel (81) and rear wheel (82) of the trolley are made of stainless steel.

6. The device for measuring the levelness of a long object according to claim 1, characterized in that, A display (13) is connected to the processor (12).

7. A method of using the apparatus for measuring the levelness of a long object according to any one of claims 1-6, characterized in that, include: Place the device on the surface of the longer object, turn on the power (7), and push the trolley from the starting position to the ending position; The current value of the car during its movement is obtained in real time by a sensitive galvanometer (11), and the data is transmitted to the processor (12). The sensor data of the front wheel (81) and rear wheel (82) of the car are acquired in real time by the first rotation angle sensor (9) and the second rotation angle sensor (10), respectively, and the data is transmitted to the processor (12). The processor (12) converts the real-time current value of the sensitive galvanometer (11) into the real-time resistance value of the semi-circular sliding resistor (4) based on the acquired current value, and obtains the offset angle of the swingable metal float (6) relative to the vertical direction based on the resistance value. The processor (12) calculates the distance the car moves based on the real-time sensor data of the front wheel (81) and rear wheel (82) of the car. Based on the real-time offset angle of the swingable metal float (6) relative to the vertical direction calculated by the processor (12) and the real-time moving distance of the trolley, the levelness information of the surface of the longer object is obtained.

8. The method of using the device for measuring the levelness of a long object according to claim 7, characterized in that, The processor (12) calculates in real time the offset angle of the swingable metal float (6) relative to the vertical direction and the real-time moving distance of the trolley, and displays it in the form of a graph.

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