Method and device for monitoring maximum deflection of flexural member of underwater gate

Abstract

The invention discloses an underwater gate flexural member maximum deflection monitoring method and device, the device comprises a first protective steel pipe and a second protective steel pipe, a middle receiver is fixedly mounted between the first protective steel pipe and the second protective steel pipe, and one end, away from the middle receiver, of the first protective steel pipe is fixedly connected with a linear laser generator; a tail receiver is fixedly installed at the end, away from the first protection steel pipe, of the second protection steel pipe, and light spot position detectors in the middle receiver and the tail receiver are arranged in a mirror image mode, so that the linear laser generator can irradiate light spots to the middle receiver and the tail receiver at the same time; receiving measurement of different positions of a light spot is achieved, the steel pipe serves as a protection unit, in-service monitoring of the gate during underwater operation is achieved, and interference of ambient light is avoided; the linear CCD is adopted to directly receive light spots for position judgment, so that the detection precision can be improved; and the monitoring range is increased by adopting a linear CCD array combination mode.

Description

Technical Field

[0001] The invention belongs to the technical field of gate detection, and in particular relates to a method and a device for monitoring the maximum deflection of a bending member of an underwater gate. Background Art

[0002] In the design and manufacture of steel gates, it is required to monitor the maximum deflection of bending members to meet the stiffness requirements of the gates during operation, but there is currently no method for monitoring the deflection of bending members of gates. There are two main reasons for this: on the one hand, the gates need to operate not only in the natural environment, but also underwater, so the monitoring methods in the natural environment alone or the underwater monitoring methods alone have their own advantages and disadvantages, but neither can be applied to the gates; on the other hand, the gates are in a free state in the gate slots, the support points are not fixed, and when subjected to water pressure, the bending members will deform as a whole, that is, the middle will bend downward and the two ends will be upturned. At this time, it is necessary to simultaneously obtain the elevations of the two support endpoints and the elevations of the points to be measured, and calculate the distance from the point to the line through the line connecting the points to be measured and the two support points, and then find the deflection value. For this reason, this application proposes a method and device for monitoring the maximum deflection of bending members of underwater gates. Summary of the invention

[0003] The purpose of the present invention is to provide a method and device for monitoring the maximum deflection of a flexural member of an underwater gate in order to solve the above-mentioned problem, thereby solving the problem mentioned in the background technology.

[0004] In order to solve the above problems, the present invention provides a technical solution:

[0005] The maximum deflection monitoring device of the bending member of the underwater gate comprises a first protective steel pipe and a second protective steel pipe, a middle receiver is fixedly installed between the first protective steel pipe and the second protective steel pipe, an end of the first protective steel pipe away from the middle receiver is fixedly connected to a laser generator, and an end of the second protective steel pipe away from the first protective steel pipe is fixedly installed with a tail receiver;

[0006] The middle receiver and the tail receiver both include a follower bracket, a barrel frame, a PCB circuit board, a linear CCD and a shading plate. The barrel frame is detachably installed inside the follower bracket. A partition is fixedly connected inside the barrel frame. A PCB circuit board is installed inside the barrel frame and below the partition. A linear CCD is fixed on the PCB circuit board. A shading plate is installed inside the barrel frame and above the partition.

[0007] Preferably, a wire cover is detachably connected to the interior of the follower bracket, and the wire cover is located at one end of the drum frame.

[0008] Preferably, a base is provided at the bottom of the one-line laser generator, the middle receiver and the tail receiver, and fixing parts are fixedly connected to both sides of the one-line laser generator, the middle receiver and the tail receiver, and fastening bolts are threadedly connected between the base and the fixing parts.

[0009] Preferably, a tail cover is fixedly connected to the interior of the tail receiver.

[0010] Preferably, the internal cartridge holders of the middle receiver and the rear receiver are arranged in mirror image positions.

[0011] The maximum deflection monitoring method of the underwater gate bending member comprises the following steps:

[0012] S1. Determine the base position for installing the one-character laser generator, the middle receiver and the tail receiver, and measure the distance from the one-character laser generator to the middle receiver and the distance from the middle receiver to the tail receiver, and cut the first protective steel pipe and the second protective steel pipe according to the measured lengths;

[0013] S2. Sleeve the first protective steel pipe and the second protective steel pipe that have been cut at both ends of the follow-up bracket for the middle receiver, and perform circumferential welding along the joints;

[0014] S3, sleeve the follow-up bracket for the tail receiver onto one end of the second protective steel pipe, and perform circumferential welding along the joint;

[0015] S4, sleeve the laser generator onto the other end of the first protective steel pipe, and perform circumferential welding along the joint;

[0016] S5. Weld the three bases along the U-shaped bottom to the gate component to be tested according to the S-th layout position;

[0017] S6. Place the PCB circuit board inside the drum frame, install a light shielding plate on the surface photosensitive part of the linear CCD, and lead the wires out through the wire holes of the drum frame;

[0018] S7, respectively placing the assembled cartridge rack inside the middle receiver follower bracket and the rear receiver follower bracket, and rotating the directions so that the linear CCD photosensitive surface faces the side of the one-line laser generator;

[0019] S8. Lead out the outgoing wires of the middle receiver and the tail receiver through the wire holes of the follower bracket, and inject sealant around the top and outgoing wire ends of the middle receiver and the tail receiver and solidify them;

[0020] S9, hoist the assembled deflection detection device onto the welded base, connect it with fastening bolts, complete the circuit connection and test it;

[0021] S10, start a straight laser generator, and the horizontal laser emitted by the laser generator hits the linear CCDs of the middle receiver and the tail receiver arranged vertically at the same time, and generates a spot image on the pixels of the linear CCD;

[0022] S11. Calculate the positions of the light spot images of the middle receiver and the tail receiver on the linear CCD. When the detection part is bent and deformed, the light spot image changes synchronously between different pixel points of the linear CCD through the vertical descent or rise of the linear CCD. Calculate the difference in the positions of the pixel points to obtain the value of the descent or rise of the measuring point.

[0023] The beneficial effects of the present invention are:

[0024] 1. By mirroring the light spot position detectors inside the middle receiver and the tail receiver, the laser generator can simultaneously irradiate the light spot to the middle receiver and the tail receiver, thus achieving reception and measurement of different positions of a light spot;

[0025] 2. Using steel pipes as protection units enables in-service monitoring of the gate during underwater operation and avoids interference from ambient light;

[0026] 3. Use linear CCD to directly receive the light spot for position judgment, which can improve the detection accuracy;

[0027] 4. The use of linear CCD array combination increases the monitoring range;

[0028] 5. The split design and on-site assembly type enable rapid application on large gate components. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is an exploded schematic diagram of the middle receiver and the tail receiver of the present invention;

[0032] Figure 3 It is a schematic diagram of the installation of the middle receiver and the tail receiver of the present invention;

[0033] Figure 4 It is the test principle diagram of the present invention.

[0034] In the figure: 1. first protective steel pipe; 2. second protective steel pipe; 3. straight laser generator; 4. middle receiver; 5. tail receiver; 6. tail cover; 7. base; 8. fastening bolts; 9. fixing parts; 101. follow-up bracket; 102. cylinder rack; 103. wire cover; 104. partition; 105. PCB circuit board; 106. linear CCD; 107. shading plate. DETAILED DESCRIPTION

[0035] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0036] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0038] Combine the following Figure 1-Figure 4 Describe the specific embodiments of the present invention:

[0039] Embodiment 1:

[0040] The maximum deflection monitoring device of the bending member of the underwater gate comprises a first protective steel pipe 1 and a second protective steel pipe 2, a middle receiver 4 is fixedly installed between the first protective steel pipe 1 and the second protective steel pipe 2, an end of the first protective steel pipe 1 away from the middle receiver 4 is fixedly connected to a straight laser generator 3, an end of the second protective steel pipe 2 away from the first protective steel pipe 1 is fixedly installed with a tail receiver 5, and the inner cylinder racks 102 of the middle receiver 4 and the tail receiver 5 are arranged in mirror positions, and the cylinder racks 102 do not exceed half of the inner circular cross-sectional area of ​​the middle receiver 4 or the tail receiver 5 after installation, so that the straight laser generator 3 can irradiate the light spot to the middle receiver 4 and the tail receiver 5 at the same time, so as to realize the reception and measurement of different positions of a beam of light spots;

[0041] The middle receiver 4 and the rear receiver 5 both include a follower bracket 101, a barrel rack 102, a PCB circuit board 105, a linear CCD 106 and a shading plate 107. The barrel rack 102 is detachably installed inside the follower bracket 101. A partition 104 is fixedly connected inside the barrel rack 102. A PCB circuit board 105 is installed inside the barrel rack 102 and below the partition 104. A linear CCD 106 is fixed on the PCB circuit board 105. A shading plate 107 is installed inside the barrel rack 102 and above the partition 104. Since the straight-line laser generator 3 runs in the first protective steel pipe 1 and the second protective steel pipe 2, the laser irradiation will be reflected on the pipe wall, affecting the detection accuracy. A shading plate 107 is installed in front of the linear CCD 106 to filter out unnecessary reflected light and avoid light interference.

[0042] The interior of the follow-up bracket 101 is detachably connected with a wire cover 103 , and the wire cover 103 is located at one end of the cartridge frame 102 , and can seal the follow-up bracket 101 to improve the waterproof effect of the device.

[0043] Among them, a base 7 is provided at the bottom of the straight laser generator 3, the middle receiver 4 and the tail receiver 5, and fixing parts 9 are fixedly connected to both sides of the straight laser generator 3, the middle receiver 4 and the tail receiver 5. A fastening bolt 8 is threadedly connected between the base 7 and the fixing part 9, which facilitates the installation of the assembled equipment on the gate to be tested.

[0044] The tail cover 6 is fixedly connected to the interior of the tail receiver 5 .

[0045] Embodiment 2:

[0046] Determine the position of the base 7 for installing the straight-line laser generator 3, the middle receiver 4 and the tail receiver 5, and measure the distance from the straight-line laser generator 3 to the middle receiver 4 and the distance from the middle receiver 4 to the tail receiver 5, and cut the first protective steel pipe 1 and the second protective steel pipe 2 according to the measured length; sleeve the two ends of the follower bracket 101 for the middle receiver 4 on the cut first protective steel pipe 1 and the second protective steel pipe 2, and perform welding along the joints; sleeve the follower bracket 101 for the tail receiver 5 on one end of the second protective steel pipe 2, and perform welding along the joints; sleeve the straight-line laser generator 3 on the first The other end of a protective steel pipe 1 is welded around the joint; three bases 7 are welded to the gate member to be tested along the U-shaped bottom according to the position of the S1 layout; the PCB circuit board 105 is placed inside the drum frame 102, and a light shielding plate 107 is installed at the surface photosensitive part of the linear CCD 106, and the wire is led out through the wire hole of the drum frame 102; the assembled drum frame 102 is placed inside the middle receiver 4 follower bracket 101 and the rear receiver 5 follower bracket 101, respectively, and the directions are rotated respectively so that the photosensitive surface of the linear CCD 106 faces one side of the one-word laser generator 3; the middle receiver 4 The outgoing wires of the middle receiver 4 and the tail receiver 5 are led out through the wire holes of the follower bracket 101, and sealant is poured around the tops and outgoing wire ends of the middle receiver 4 and the tail receiver 5 and cured; the assembled deflection detection device is hoisted to the welded base 7 and connected with the fastening bolts 8 to complete the circuit connection and test; the straight laser generator 3 is started, and the horizontal laser it emits simultaneously hits the linear CCD106 arranged vertically on the middle receiver 4 and the tail receiver 5, generating a spot image on the pixels of the linear CCD106; the linear CCD106 is used as a photosensitive device, taking TCD1304 as an example, the device 3648 pixels are integrated in the linear range of 29.1mm. This device uses a combination of three linear CCD106 photosensitive devices for spot position detection. The range can reach 87.3mm and the minimum resolution reaches 8um. By calculating the position of the spot image of the middle receiver 4 and the tail receiver 5 on the linear CCD106, it can be used for precise positioning. When the linear CCD106 vertically drops or rises with the bending of the device, the spot image will change synchronously between different pixel points of the linear CCD106. By calculating the difference in the position of the pixel points, the value of the drop or rise of the measuring point can be accurately obtained;

[0047] The middle receiver 4 is set as the measuring position, and the tail receiver 5 is set as the reference position, and the detected difference and the distance between the one-word laser generator 3 and the middle detection position, and the distance between the middle detection position and the tail detection position are comprehensively calculated;

[0048] For example: the initial value of the measurement position is A1, and the value after the component is deformed is A2;

[0049] The initial value of the reference position is B1, and the value after the component is deformed is B2;

[0050] The distance between the laser generator 3 and the measuring position is D1, and the distance between the measuring position and the reference position is D2.

[0051] The maximum deflection at the measuring position is:

[0052]

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The maximum deflection monitoring device of underwater gate bending members is characterized by: It comprises a first protective steel pipe (1) and a second protective steel pipe (2), wherein a middle receiver (4) is fixedly installed between the first protective steel pipe (1) and the second protective steel pipe (2), an end of the first protective steel pipe (1) away from the middle receiver (4) is fixedly connected to a laser generator (3), and an end of the second protective steel pipe (2) away from the first protective steel pipe (1) is fixedly installed with a rear receiver (5); The middle receiver (4) and the tail receiver (5) both comprise a follower bracket (101), a cartridge frame (102), a PCB circuit board (105), a linear CCD (106) and a light shielding plate (107); the cartridge frame (102) is detachably mounted inside the follower bracket (101); a partition plate (104) is fixedly connected inside the cartridge frame (102); a PCB circuit board (105) is mounted inside the cartridge frame (102) and below the partition plate (104); a linear CCD (106) is fixed on the PCB circuit board (105); and a light shielding plate (107) is mounted inside the cartridge frame (102) and above the partition plate (104).

2. The maximum deflection monitoring device for underwater gate bending members according to claim 1 is characterized in that: The interior of the follower bracket (101) is detachably connected to a wire cover (103), and the wire cover (103) is located at one end of the cartridge frame (102).

3. The maximum deflection monitoring device for underwater gate bending members according to claim 1 is characterized in that: The bottoms of the single-character laser generator (3), the middle receiver (4) and the tail receiver (5) are all provided with bases (7); both sides of the single-character laser generator (3), the middle receiver (4) and the tail receiver (5) are fixedly connected with fixing members (9); and fastening bolts (8) are threadedly connected between the base (7) and the fixing members (9).

4. The maximum deflection monitoring device for underwater gate bending members according to claim 1 is characterized in that: A tail cover (6) is fixedly connected inside the tail receiver (5).

5. The maximum deflection monitoring device for underwater gate bending members according to claim 1 is characterized in that: The inner cartridge holders (102) of the middle receiver (4) and the rear receiver (5) are arranged in mirror image positions.

6. A method for monitoring the maximum deflection of a flexural member of an underwater gate, characterized in that: The following steps are involved: S1. Determine the position of the base (7) for installing the one-character laser generator (3), the middle receiver (4) and the tail receiver (5), measure the distance from the one-character laser generator (3) to the middle receiver (4) and the distance from the middle receiver (4) to the tail receiver (5), and cut the first protective steel pipe (1) and the second protective steel pipe (2) according to the measured lengths; S2, sleeve the two ends of the follower bracket (101) for the middle receiver (4) onto the cut first protective steel pipe (1) and the second protective steel pipe (2), and perform circumferential welding along the joints; S3, sleeve the follower bracket (101) for the tail receiver (5) onto one end of the second protective steel pipe (2), and perform circumferential welding along the joint; S4, sleeve the laser generator (3) onto the other end of the first protective steel pipe (1), and perform circumferential welding along the joint; S5, welding the three bases (7) to the gate component to be tested along the U-shaped bottom according to the positions laid out in S1; S6, placing the PCB circuit board (105) inside the drum frame (102), installing a light shielding plate (107) at the photosensitive surface of the linear CCD (106), and leading the wire out through the wire hole of the drum frame (102); S7, placing the assembled cartridge frame (102) inside the follower bracket (101) of the middle receiver (4) and inside the follower bracket (101) of the tail receiver (5), respectively, and rotating the directions so that the photosensitive surface of the linear CCD (106) faces one side of the one-word laser generator (3); S8, lead out the outgoing wires of the middle receiver (4) and the tail receiver (5) through the wire holes of the follower bracket (101), and inject sealant around the top and outgoing wire ends of the middle receiver (4) and the tail receiver (5) and solidify them; S9, hoisting the assembled deflection detection device onto the welded base (7), connecting it with fastening bolts (8), completing the circuit connection and testing; S10, starting a laser generator (3), the horizontal laser emitted by the laser generator simultaneously hits the linear CCD (106) arranged vertically on the middle receiver (4) and the tail receiver (5), and generates a light spot image on the pixels of the linear CCD (106); S11. Calculate the positions of the light spot images of the middle receiver (4) and the tail receiver (5) on the linear CCD (106). When the detection part is flexurally deformed, the light spot images are synchronously changed between different pixel points of the linear CCD (106) through the vertical descent or rise of the linear CCD (106). The difference in the positions of the pixel points is calculated to obtain the value of the descent or rise of the measurement point.

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