Frictional resistance torque detection tool for marine photoelectric evidence obtaining equipment

Abstract

The utility model discloses a frictional resistance moment detection tool for marine photoelectric evidence obtaining equipment, which relates to the field of offshore photoelectric evidence obtaining equipment and comprises a bottom plate and a counterweight disc, a plurality of uniformly distributed screw holes are arranged at the front end of the counterweight disc, screws are in threaded connection with the interiors of the screw holes, a sliding groove is arranged at the upper end of the bottom plate, and the sliding groove is communicated with the counterweight disc. A sliding seat is slidably connected to the outer surface of the guide rod, a pulley supporting rod is fixedly connected to the upper end of the sliding seat, a pulley adjusting rod is slidably connected to the outer surface of the pulley supporting rod, a pulley block is arranged at the front end of the pulley adjusting rod, and a small-diameter pull rope is movably connected to the pulley block. According to the utility model, the counterweight disc and the pulley block with the adjustable position are arranged, and the standard mass block is combined, so that the verticality of the force arm and the acting force direction is ensured, the accurate measurement of the frictional resistance moment is ensured, and the higher measurement precision is further provided.

Description

Technical Field

[0001] This utility model relates to the field of marine optoelectronic evidence collection equipment, specifically to a tooling for detecting frictional resistance torque in marine optoelectronic evidence collection equipment. Background Technology

[0002] Optoelectronic evidence collection equipment is essential for maritime law enforcement vessels. Mounted on ships, this equipment works in conjunction with radar. Upon receiving target location information from radar or other input sources, the azimuth and pitch motors quickly locate suspicious targets at sea, achieving rapid and accurate target locking within the effective range and providing clear optical imaging. This supports safe navigation and evidence collection. However, when significant changes in tilting torsional torque caused by the damping torque of the dynamic seal in the optoelectronic shaft system and misalignment occur, the servo system experiences large disturbance torques, leading to a decrease in rapid and accurate response performance. Improving the friction of the dynamic seal in the optoelectronic shaft system can mitigate this issue. Accurate measurement of resistance torque provides precise motor working resistance torque correction parameters for the motor servo system, ultimately achieving precise motor control and rapid and accurate positioning of maritime targets, improving the response performance of the optoelectronic system. The traditional method for measuring the resistance torque of optoelectronic equipment is as follows: On the azimuth or pitch axis, the point of application of the spring scale tension line is led out using the threaded hole or screw on the azimuth or pitch component. The force of the spring scale is gradually increased to pull the azimuth or pitch axis to start rotating. The reading is recorded when the azimuth or pitch axis rotates from a stationary state. The magnitude of the rotation resistance torque of the axis is calculated based on the reading and the formula M=L*F.

[0003] Current testing methods are mostly manual, and the direction of the force applied by the spring scale is difficult to align with the normal of the contact point on the rotating surface, often resulting in an angle of varying magnitude. This means the lever arm is not perpendicular to the force direction. Readings are taken at the moment the azimuth or pitch axis begins to rotate. When manually applying force, the magnitude of the rotational force is unstable, leading to inaccurate readings. According to the torque calculation formula, the errors in F and L are relatively large. Traditional methods result in poor accuracy in torque measurement. Therefore, a frictional resistance torque testing fixture for marine photoelectric evidence collection equipment is proposed to address the aforementioned problems. Utility Model Content

[0004] To address the aforementioned technical problems, a tooling for detecting frictional resistance torque in marine optoelectronic evidence collection equipment is provided. This technical solution solves the problems mentioned in the background technology, where current detection methods are mostly manual, the direction of the force applied by the spring scale is difficult to align with the normal of the contact point on the rotating surface, and there is often an angle of varying magnitude, i.e., the lever arm is not perpendicular to the force direction. The reading is taken at the moment the azimuth or pitch axis begins to rotate, and the magnitude of the rotational force is unstable and the reading is inaccurate when manually applying force. According to the torque calculation formula, the errors of F and L are relatively large, resulting in poor accuracy in measuring torque using traditional methods.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A tooling for detecting frictional resistance torque in a marine optoelectronic evidence collection device includes a base plate and a counterweight plate. The front end of the counterweight plate has several evenly distributed screw holes, each with a screw threaded into it. The upper end of the base plate has a sliding groove, inside which a guide rod is fixedly connected. A sliding seat is slidably connected to the outer surface of the guide rod. A pulley support rod is fixedly connected to the upper end of the sliding seat. A pulley adjusting rod is slidably connected to the outer surface of the pulley support rod. A pulley assembly is located at the front end of the pulley assembly. A thin-diameter tension rope is movably connected to the pulley assembly. One end of the thin-diameter tension rope is fixedly connected to a hook, and the other end is tied to a screw at the front end of the counterweight plate. A standard mass block is suspended from the hook.

[0007] Preferably, the upper end of the sliding seat is fixedly connected to fixing blocks on both the front and rear sides of the pulley support rod.

[0008] Preferably, the upper end of the fixing block has two symmetrically distributed threaded holes, and an adjusting screw is threaded into the threaded holes.

[0009] Preferably, the front end of the pulley adjusting rod has a threaded hole, and the threaded hole is internally connected to a fixing screw.

[0010] Preferably, both the adjusting screw and the fixing screw are fixedly connected to rubber anti-slip pads at their ends.

[0011] Preferably, the inner side of each screw hole is inlaid with a wire thread sleeve.

[0012] Preferably, the counterweight plate is made of 6061 aluminum material, and the mass distribution of the counterweight plate is uniform.

[0013] The advantages of this utility model compared with the prior art are:

[0014] This solution proposes a tooling for detecting frictional resistance torque in marine optoelectronic evidence collection equipment. By setting up a counterweight plate and an adjustable pulley system, combined with the use of a standard mass block, the perpendicularity of the lever arm to the direction of the force is ensured, thereby ensuring accurate measurement of frictional resistance torque and providing higher measurement accuracy. Attached Figure Description

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 A schematic diagram of the photoelectric evidence collection device used for testing according to this utility model;

[0017] Figure 3 This is a process diagram of measuring the azimuth resistance torque according to this utility model;

[0018] Figure 4 This diagram illustrates the process of measuring pitch drag torque according to this invention.

[0019] The numbers on the map are:

[0020] 1. Base plate; 2. Slide groove; 3. Guide rod; 4. Sliding seat; 401. Fixing block; 402. Adjusting screw; 5. Pulley support rod; 6. Pulley adjusting rod; 601. Fixing screw; 7. Pulley block; 8. Small diameter tension rope; 9. Hook; 10. Counterweight plate; 1001. Screw hole; 11. Standard mass block; 12. Orientation component; 13. U-shaped frame; 14. Pitch component. Detailed Implementation

[0021] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0022] Reference Figure 1 As shown, a friction resistance torque detection fixture for marine optoelectronic evidence collection equipment includes a base plate 1 and a counterweight plate 10. The front end of the counterweight plate 10 has several evenly distributed screw holes 1001, and screws are threaded into the screw holes 1001. The upper end of the base plate 1 has a sliding groove 2, and a guide rod 3 is fixedly connected inside the sliding groove 2. A sliding seat 4 is slidably connected to the outer surface of the guide rod 3. A pulley support rod 5 is fixedly connected to the upper end of the sliding seat 4. A pulley adjusting rod 6 is slidably connected to the outer surface of the pulley support rod 5. A pulley assembly 7 is provided at the front end of the pulley adjusting rod 6. A thin-diameter tension rope 8 is movably connected to the pulley assembly 7. A hook 9 is fixedly connected to one end of the thin-diameter tension rope 8. The other end of the thin-diameter tension rope 8 is tied to a screw at the front end of the counterweight plate 10. A standard mass block 11 is suspended on the hook 9.

[0023] Furthermore, the upper end of the sliding seat 4 is fixedly connected to both the front and rear sides of the pulley support rod 5 with fixing blocks 401. The upper end of the fixing block 401 has two symmetrically distributed threaded holes, and the adjusting screw 402 is threadedly connected to the threaded holes. The front end of the pulley adjusting rod 6 has a threaded hole, and the fixing screw 601 is threadedly connected to the threaded hole. The ends of the adjusting screw 402 and the fixing screw 601 are fixedly connected with rubber anti-slip pads.

[0024] Furthermore, the end of the adjusting screw 402 abuts against the upper end of the base plate 1 to fix the sliding seat 4. The position of the sliding seat 4 can be adjusted by loosening the adjusting screw 402. The end of the fixing screw 601 abuts against the front end of the pulley support rod 5 to fix the pulley adjusting rod 6. The position of the pulley adjusting rod 6 can be adjusted by loosening the fixing screw 601. The rubber anti-slip pad can increase the friction when the adjusting screw 402 and the fixing screw 601 abut, making the fixation more stable.

[0025] Furthermore, the counterweight plate 10 is made of 6061 aluminum material with a thickness of 3mm. The counterweight plate 10 has a uniform mass distribution, and the surface is treated with oxidation for corrosion prevention and painted with white paint. The front of the counterweight plate 10 is laser-marked and filled with black paint for easy storage of markings. The inner side of the screw holes 1001 is inlaid with steel wire thread sleeves, which can be disassembled and used multiple times. The side walls of the counterweight plate 10 have blunted sharp edges to ensure safe use.

[0026] Reference Figure 2 As shown, the photoelectric evidence collection equipment used in this scheme includes an orientation component 12, a U-shaped frame 13 is provided at the upper end of the orientation component 12, and a pitch component 14 is provided on the inner side of the U-shaped frame 13.

[0027] Reference Figure 3 As shown, when measuring the torque of the azimuth assembly 12, the azimuth assembly 12 is placed on a marble platform or a platform with good rigidity. A level is used on the azimuth assembly 12 to measure whether the rotating surface of the azimuth assembly is horizontal or whether the rotation axis is vertical. The azimuth axis is rotated at 120° intervals. Based on the readings and the height, the rotating surface of the azimuth assembly is adjusted to a better level by using copper pads.

[0028] Furthermore, a vertical screw is fixed on the orientation component 12, and the thin-diameter tension rope 8 is tied to the screw. A height gauge is used to measure the height of the rope tie point relative to the platform. The fixing screw 601 is loosened, and the height of the pulley adjustment rod 6 and the pulley line is adjusted to be consistent with the height of the rope tie point. The rope tie point is observed. Under tension, the rope line and the tangent at that point are in the same direction. If there is a large angle, the position of the sliding seat 4 can be adjusted. Through the above two alignment operations, the lever arm L is ensured to be relatively perpendicular to the rope force F.

[0029] Furthermore, to quickly obtain the pulling force of a suitable standard mass block 11, a spring scale can be used to roughly pull the hook 9 at one end of the hook 9 to obtain the approximate resistance torque. Then, based on the roughly measured resistance torque, a standard mass block 11 is hung below the hook 9. The standard mass blocks 11 are configured with parameters of 0.1, 0.2, 0.5, and 1 kg. The standard mass blocks 11 are combined according to the weight combination method. In order to obtain a more accurate weight at the moment of shaft movement start-up, small mass standard mass blocks 11 are added as much as possible at the weight close to the target weight.

[0030] Reference Figure 4As shown, when measuring the torque of the pitch assembly 14, the pitch assembly 14 or the photoelectric evidence collection device is placed on the platform as a whole. The side cover is removed and the mounting surface is cleaned. Then, the counterweight plate 10 is installed on one side of the U-shaped frame. The counterweight plate 10 is gradually fixed with symmetrical screws to ensure that the plate surface fits well with the pitch rotation side and that the plate surface is not twisted. Then, screws are installed in the screw holes 1001 and the thin-diameter tension rope 8 is tied to the screws. The pitch torque is roughly measured using a spring scale to estimate the weight of the required standard mass block 11. A standard mass block 11 of a certain weight is fixed on the hook 9. The counterweight plate 10 is rotated so that the radial force of the thin-diameter rope is perpendicular to the direction of the plumb bob. The standard mass block 11 is slowly and steadily increased. When the pitch axis starts to rotate, the weight of the standard mass block 11 is recorded. The pitch resistance torque is calculated according to the torque formula, thereby accurately measuring the pitch friction torque.

[0031] Working principle: In use, first place the orientation component 12 on the marble platform, use a level to check if the rotating surface is level, and adjust it with copper pads if necessary. Fix the vertical screw on the orientation component 12, and tie the thin-diameter tension rope 8 to the screw. Adjust the height of the pulley adjusting rod 6 to be consistent with the rope attachment point, ensuring that the lever arm L is perpendicular to the rope force F. Then, use a spring scale to roughly measure the resistance torque, estimate the required standard mass block 11, and gradually adjust the combination. Add as small a mass block 11 as possible when the weight is close to the target weight. Record the weight of the standard mass block 11 when the orientation axis starts to rotate. Then place the pitch component 14 on the platform. Remove the side cover and clean the mounting surface. Then install the counterweight plate 10 on one side of the U-shaped frame. Next, install the screw in the screw hole 1001 and tie the thin-diameter tension rope 8 to the screw. Use a spring scale to roughly measure the pitch torque and estimate the weight of the required standard mass block 11. Then fix a standard mass block 11 of a certain weight on the hook 9. Rotate the counterweight plate 10 so that the radial force of the thin-diameter rope is perpendicular to the direction of the plumb bob. Then slowly and steadily increase the standard mass block 11. When the pitch axis starts to rotate, record the weight of the standard mass block 11. Based on the recorded weight of the standard mass block 11 and the torque formula, the magnitude of the azimuth resistance torque and pitch resistance torque can be calculated.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tooling for detecting frictional resistance torque in a marine optoelectronic evidence collection device, characterized in that, The base plate (1) and the counterweight plate (10) are provided. The front end of the counterweight plate (10) is provided with several evenly distributed screw holes (1001). The screw holes (1001) are connected to screws by internal threads. The upper end of the base plate (1) is provided with a sliding groove (2). The inside of the sliding groove (2) is fixedly connected to a guide rod (3). The outer surface of the guide rod (3) is slidably connected to a sliding seat (4). The upper end of the sliding seat (4) is fixedly connected to a pulley support rod (5). The outer surface of the pulley support rod (5) is slidably connected to a pulley adjustment rod (6). The front end of the pulley adjustment rod (6) is provided with a pulley group (7). A thin diameter tension rope (8) is movably connected to the pulley group (7). One end of the thin diameter tension rope (8) is fixedly connected to a hook (9). The other end of the thin diameter tension rope (8) is tied to a screw at the front end of the counterweight plate (10). A standard mass block (11) is suspended on the hook (9).

2. The tooling for detecting frictional resistance torque in a marine optoelectronic evidence collection device according to claim 1, characterized in that: The upper end of the sliding seat (4) is fixedly connected to the front and rear sides of the pulley support rod (5) with fixing blocks (401).

3. The tooling for detecting frictional resistance torque in a marine optoelectronic evidence collection device according to claim 2, characterized in that: The upper end of the fixing block (401) has two symmetrically distributed threaded holes, and an adjusting screw (402) is threadedly connected to the threaded holes.

4. The tooling for detecting frictional resistance torque in a marine optoelectronic evidence collection device according to claim 1, characterized in that: The front end of the pulley adjusting rod (6) has a threaded hole, and the threaded hole is connected to a fixing screw (601).

5. The tooling for detecting frictional resistance torque in a marine optoelectronic evidence collection device according to claim 3, characterized in that: Both the adjusting screw (402) and the fixing screw (601) are fixedly connected to rubber anti-slip pads at their ends.

6. The tooling for detecting frictional resistance torque in a marine optoelectronic evidence collection device according to claim 1, characterized in that: The inner side of each screw hole (1001) is inlaid with a wire thread sleeve.

7. The tooling for detecting frictional resistance torque in a marine optoelectronic evidence collection device according to claim 1, characterized in that: The counterweight plate (10) is made of 6061 aluminum material and has a uniform mass distribution.

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