A safety aid for parachute training and method of use thereof

Abstract

The present application relates to the field of parachute training equipment, and discloses a safety auxiliary device for parachute training and a use method thereof, wherein the device comprises a main frame, a traction rope, a protective net, a protective pad and a blowing device; the main frame is composed of a plurality of support columns arranged at the periphery of the protective net, and the protective net is connected to the support columns; the protective pad is connected to the support columns and located below the protective net, and has an air outlet area in the center of the protective pad; the blowing device is located below the protective pad; one end of two groups of traction ropes is respectively connected with a traction rope driving system, and the other end is gathered in the center area of the protective net through a steering wheel arranged on the support column and is connected with a harness. The present application uses the mode that two groups of two traction ropes jointly pull, ensures that the trainee can float up and down in the air according to the change of posture and wind speed, and at the same time, will not fly out of the training area due to incorrect posture, solves the problem of difficulty in ensuring the safety of personnel in the existing parachute wind tunnel training, and improves the safety of parachute training.

Description

Technical Field

[0001] This invention relates to the field of parachute training equipment, specifically a safety auxiliary device for parachute training and its usage method. Background Technology

[0002] As a sport, skydiving not only challenges individual limits but also serves purposes such as disaster relief and long-range deployment. Developing skydiving training facilities is of great significance to economic development. Current technologies mainly fall into three categories: live jump training, ground-based training equipment, and wind tunnel freefall training.

[0003] Parachute wind tunnel freefall training involves conducting levitation exercises in a vertical wind tunnel to help trainees adapt to an aerial floating state and master attitude maintenance techniques. The training equipment primarily relies on the vertical wind tunnel. Freefall training focuses on simulating the freefall process from when a parachutist jumps from the aircraft until the parachute fully deploys, making it highly efficient. However, during parachute wind tunnel training, trainees are suspended in the air without direct safety protection measures. If a mistake is made, they are highly likely to fly out of the flight area, resulting in injury. For new trainees, due to their lack of proficiency in the maneuvers, solo flight is difficult, often requiring instructors to fly alongside them to assist in adjusting their attitude and ensuring their safety, thus significantly limiting training efficiency.

[0004] In response to the above practical needs, how to assist trainees in safe and efficient flight training in the skydiving wind tunnel is a key issue currently facing skydiving wind tunnel training. Summary of the Invention

[0005] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a safety auxiliary device for parachute training and its usage method. The device uses two sets of two traction ropes in each set to ensure that the trainee can float up and down in the air with changes in posture and wind speed, while not flying out of the training area due to incorrect posture. This solves the problem of difficulty in ensuring personnel safety in existing parachute wind tunnel training and improves the safety of parachute training.

[0006] On one hand, the present invention provides a safety auxiliary device for parachute training, comprising: a main frame, a traction rope, a protective net, a protective pad, and a blower; The main frame consists of several pillars arranged around the perimeter of the protective netting, and the protective netting is connected to the pillars. The protective pad is connected to the support column and located below the protective net. The protective pad has an air outlet area in the center, and the air outlet area has a middle protective net. The blower is located below the protective pad and blows air upwards from the air outlet area; One end of each of the two sets of traction ropes is connected to a traction rope drive system, and the other end is gathered in the central area of ​​the protective net through a steering wheel set on the support post and connected to a carrying strap.

[0007] A soundproof wall is installed around the blower.

[0008] The main frame is provided with a top reversing mechanism for reversing the traction rope, as well as a lateral reversing structure and / or a longitudinal reversing mechanism.

[0009] Optionally, the traction rope includes a main rope, a secondary rope A, and a secondary rope B. The secondary rope A and the secondary rope B are connected to one end of the main rope. The main rope is led out from the traction rope drive system and connected to the secondary rope A and the secondary rope B respectively. The auxiliary rope A is connected to the carrying strap after passing through the top reversing mechanism of a support column. The auxiliary rope B is connected to the carrying strap after passing through the lateral reversing structure of the support column, and then sequentially enters the longitudinal reversing mechanism and the top reversing mechanism of the adjacent support column.

[0010] Optionally, the top reversing mechanism includes a steering wheel E, a steering wheel F, a steering wheel G, and a steering wheel H, wherein the steering wheel E is mounted on the vertical surface of the support column, the steering wheels F and G are mounted parallel to each other on the top surface of the support column, and the steering wheel H is mounted on the lower end surface of the top of the support column; the steering wheels E and F cooperate to change the auxiliary rope B from longitudinal to transverse; the auxiliary rope B then enters the steering wheel G and is reversing through the steering wheel H before connecting to the carrying strap; The lateral reversing structure includes a steering wheel A and a steering wheel B installed on two different vertical surfaces of the support column. After the auxiliary rope B undergoes a longitudinal to lateral reversal through the steering wheel A, it passes through the steering wheel B and then enters the steering wheel C of the longitudinal reversing mechanism. The longitudinal reversing mechanism includes a steering wheel C and a steering wheel D installed on the vertical surface of the support column. The auxiliary rope B passes through the steering wheel B and enters the steering wheel C. After passing through the steering wheel D and undergoing vertical reversal, the rope enters the steering wheel E of the top reversing mechanism. The auxiliary rope A is connected to the shoulder strap after being reversed by the top reversing mechanism.

[0011] On the other hand, the present invention provides a method for using a safety auxiliary device for parachute training. The motor of the blower in the safety auxiliary device adopts a speed closed loop, and the drive motor of the traction rope drive system adopts a torque closed loop. A control model of the parachute training auxiliary device is established. The relationship between the speed of the blower motor and the torque of the traction rope motor is obtained from the control model. In order to calibrate the torque correction coefficient of the traction rope motor, a hovering test is carried out for different trainees before training to obtain the calibrated correction coefficient and input it into the control model. Then, parachute training is carried out.

[0012] The specific usage process is as follows: S100. Establish a control model for the parachute training auxiliary device; the control model is... F 风 + F 绳 = G 人 ,in, F 风 = ω 2 × A 人 × f 1, ω The motor speed of the blower equipment. F 风 The thrust exerted on a person by the air blown out by a hair dryer. F 绳 The tension exerted by the traction rope on the person. A 人 For the windward area of ​​the trainees, f 1 is a correction factor for the relationship between thrust and motor speed, which is determined by the characteristics of the blower mechanism (such as blade shape and hub shape); F 绳 =2× T ×sin θ × f 2× f a , T The torque of the drive motor for the traction rope drive system. θ The angle between the traction rope and the horizontal plane. f 2 is a correction factor for the relationship between tension and motor torque, determined by the characteristics of the traction rope equipment mechanism (such as the diameter of the winding reel and the reduction ratio of the reducer). f a This is the torque correction coefficient for the drive motor of the traction rope drive system; G 人 The training weight for the trainees; S200, Measure the windward area and training weight of the trainees; S300, Preset drive motor torque correction coefficient f a =1; S400: Enables the trainee to hover at a set altitude, adjusting according to the hovering status. f a value; S500, Input the adjusted correction coefficients into the control model; S600, conduct parachute training.

[0013] In step S400, adjustments are made based on the hovering status.f a The method of value is to observe the personnel, with the goal of keeping the trainer stable at a fixed height; if the personnel descend, the value is increased. f a Conversely, decrease f a .

[0014] The present invention has the following advantages: This invention utilizes two sets of two traction ropes in each set to ensure that trainees can float up and down in the air with changes in posture and wind speed, while preventing them from flying out of the training area due to incorrect posture. This solves the problem of ensuring personnel safety in existing parachute wind tunnel training and improves the safety of parachute training. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the safety auxiliary device for parachute training. Figure 2 This is a front view schematic diagram of the safety auxiliary device for parachute training; Figure 3 This is a schematic diagram of the installation structure of the traction rope drive system; Figure 4 This is a schematic diagram of the installation of the pulley block of the lateral reversing structure; Figure 5 This is a schematic diagram of the pulley block installation of the longitudinal reversing mechanism; Figure 6 This is a schematic diagram of the installation of the pulley block of the top reversing mechanism; Figure 7 This is another schematic diagram of the installation of the pulley block of the top reversing mechanism; Figure 8 This is a schematic diagram of the structure of the traction rope drive system; Figure 9 This is a flowchart illustrating the use of the safety aid device for parachute training.

[0016] In the diagram: 1. Support post; 2. Safety net; 3. Traction rope; 4. Protective mat; 5. Ladder platform; 6. Intermediate safety net; 7. Soundproof wall; 8. Blowering equipment; 9. Equipment foundation; 10. Traction rope drive system; 11. Main rope; 12. Secondary rope A; 13. Secondary rope B; 14. Carrying strap; 15. Steering wheel A; 16. Steering wheel B; 17. Steering wheel C; 18. Steering wheel D; 19. Steering wheel E; 20. Steering wheel F; 2 1. Steering wheel G; 22. Steering wheel H; 23. Steering wheel I; 24. Steering wheel J; 25. Steering wheel K; 26. Steering wheel L; 27. Drive motor; 28. Reducer; 29. ​​Coupling; 30. Moving pulley; 31. Winch; 32. Drive base; 33. Pulley A; 34. Drive belt; 35. Pulley B; 36. Lead screw; 37. Guide rail; 38. Slider; 39. Nut; 40. Nut seat; 41. Cable pulley. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0018] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying 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 a process, method, article, or apparatus.

[0019] As described in the background section, freefall training in a vertical wind tunnel involves training levitation maneuvers to adapt trainees to an aerial floating state and master techniques for maintaining attitude in the air. The training equipment primarily relies on the vertical wind tunnel. Freefall training focuses on simulating the freefall process from when a parachutist jumps from the aircraft until the parachute fully deploys, resulting in high training efficiency. However, during wind tunnel training, trainees are suspended in the air without direct safety protection measures. If a mistake is made, they are highly likely to fly out of the flight area, causing injury. For novice trainees, due to their lack of proficiency in maneuvers, solo flight is difficult, often requiring instructors to fly alongside to assist in adjusting the trainee's attitude and ensuring safety, thus significantly limiting training efficiency.

[0020] For the reasons mentioned above, this embodiment provides a safety aid device for parachute training, such as... Figures 1-8 As shown, the device includes a main frame, a traction rope 3, a protective net 2, a protective pad 4, and a blower 8; The main frame consists of several support pillars 1 arranged around the perimeter of the protective net, and the protective net 2 is connected to the support pillars 1; The protective pad 4 is connected to the support column and located below the protective net 2. The protective pad 4 has an air outlet area in the center, and the air outlet area has a middle protective net 6. The blower 8 is located below the protective pad 4 and blows air upward from the air outlet area; One end of each of the two sets of traction ropes 3 is connected to a traction rope drive system 10, and the other end is gathered in the central area of ​​the protective net through a steering wheel set on the support and connected to a carrying strap 14. The blowing device is a fan.

[0021] For example, the main frame's support column 1 is fixed to the equipment foundation 9 and is used to install the traction rope, safety net, intermediate safety net, and blower equipment; the safety net is fixedly installed on the support column to prevent trainees from falling and getting injured after flying out of the flight area; the traction rope includes a main rope 11, a secondary rope A12, and a secondary rope B13, used to restrain the trainee's position and ensure that the trainee does not fly out of the training area; the protective pad is fixedly installed on the main frame to protect personnel safety in the event of an accidental fall; a ladder platform 5 is installed on the support column, one end of which is fixed to the equipment foundation and the other end is fixed to the support column, for personnel to go up and down the platform; A soundproof enclosure 7 is installed around the blower, which is fixed to the equipment foundation 9 for noise reduction. One end of the blower is fixed to the equipment foundation 9, and the other end is flexibly connected to the support column to provide upward airflow. The equipment foundation is used to install and fix the equipment. The traction rope drive system is fixed to the support column of the main frame and is used to control the extension and retraction of the traction rope. It includes a drive motor 27, a reducer 28, a coupling 29, a movable pulley 30, a winch 31, a drive base 32, a pulley A 33, a transmission belt 34, a pulley B 35, a lead screw 36, a guide rail 37, a slider 38, a nut 39, a nut seat 40, a cable pulley 41, and a main rope 11. One end of the main rope is fixed and wound around the winch, and the other end is fixedly connected to auxiliary ropes A12 and B13 to transmit the telescopic motion. One end of auxiliary rope A12 is fixed to the main rope, and the middle is wound around steering wheels I23, J24, K25, and L26. The other end is fixed to the harness 14 to restrain the trainee's position. One end of auxiliary rope B13 is fixed to the main rope, and the other end is fixed to the harness 14. The middle is wound around steering wheels A15, B16, C17, D18, E19, F20, and G2. 1. Steering wheel H22 is used to restrain the trainee's position; the harness is fixed to the four auxiliary ropes and tied to the trainee's body to secure the trainee; Steering wheel A is fixed to the support post and is in contact with auxiliary rope B to change the direction of transmission of auxiliary rope B; Steering wheel B is fixed to the support post and is in contact with auxiliary rope B to change the direction of transmission of auxiliary rope B; Steering wheel C is fixed to the support post and is in contact with auxiliary rope B to change the direction of transmission of auxiliary rope B; Steering wheel D is fixed to the support post and is in contact with auxiliary rope B to change the direction of transmission of auxiliary rope B; Steering wheel E is fixed to the support post. The upper steering wheel is wound and in contact with the auxiliary rope B, used to change the transmission direction of the auxiliary rope B; the steering wheel F is fixed to the support column and wound and in contact with the auxiliary rope B, used to change the transmission direction of the auxiliary rope B; the steering wheel G is fixed to the support column and wound and in contact with the auxiliary rope B, used to change the transmission direction of the auxiliary rope B; the steering wheel H is fixed to the support column and wound and in contact with the auxiliary rope B, used to change the transmission direction of the auxiliary rope B; the steering wheel I is fixed to the support column and wound and in contact with the auxiliary rope A, used to change the transmission direction of the auxiliary rope A; the steering wheel J is fixed to the support column and wound and in contact with the auxiliary rope A, used to change the transmission direction of the auxiliary rope A; the steering wheel... Wheel K is fixed to the support column and wound in contact with auxiliary rope A, used to change the transmission direction of auxiliary rope A; steering wheel L is fixed to the support column and wound in contact with auxiliary rope A, used to change the transmission direction of auxiliary rope A; drive motor is fixed to the drive base, and the motor output shaft is fixedly connected to the reducer for output rotation; reducer is fixed to the drive base, with its input end fixedly connected to the drive motor output shaft and its output end fixedly connected to the coupling, used to achieve motor speed reduction at a certain ratio; the input end of the coupling is fixedly connected to the reducer output shaft and its output end is fixedly connected to the winch shaft for transmission;The movable pulley is fixed to the nut seat and makes winding contact with the main rope, used to adjust the winding point of the main rope on the winch, ensuring sequential winding. The winch is fixed to the drive base via bearings, with its input shaft fixedly connected to the coupling output shaft, and its output shaft fixedly connected to pulley A, used for winding and unwinding the main rope. The drive base is fixed to the support column, used to install the various components of the traction rope drive system. Pulley A is fixed to the winch output shaft and meshes with the transmission belt to transmit motion to the lead screw. One end of the transmission belt meshes with pulley A, and the other end meshes with pulley B to transmit rotation. Pulley B is fixed to the lead screw input shaft and meshes with the transmission belt to transmit motion to the lead screw. The lead screw is fixed to the drive base via bearings. On the moving base, parallel to the winch, the input shaft is fixedly connected to pulley B and has a threaded pair with the nut to achieve the conversion from rotation to translation. The guide rails are fixed at both ends to the drive base and have a sliding pair with the slider to constrain its movement. The slider is fixedly connected to the nut seat and has a sliding pair with the guide rail to constrain the nut, ensuring its movement is parallel to the winch axis. The nut is fixed to the nut seat and has a threaded pair with the lead screw to achieve the conversion from rotation to translation. The nut seat is fixedly connected to the nut and slider to install them and ensure they move according to the same pattern. The lead wheel is fixed to the drive base and has winding contact with the main rope to change the direction of the main rope transmission.

[0022] Steering wheels E, F, G, and H constitute the top reversing mechanism. Steering wheels A and B, installed on two different vertical surfaces of the support column, can form a lateral reversing structure; steering wheels C and D, installed on the vertical surface of the support column, can form a longitudinal reversing mechanism.

[0023] Because of the limitations imposed by the traction rope, training safety is ensured. Therefore, trainees can wear virtual reality headsets during training to simulate the parachute jump process under complex conditions such as high altitude, clouds, fog, and night.

[0024] The effect of this embodiment: This auxiliary device enables safe training for trainees weighing less than 80kg. The trainee's safe vertical floating range is 3 meters, the maximum sinking and floating speed is 2m / s, and it has virtual reality simulation capabilities.

[0025] In another embodiment, a method for using a safety auxiliary device for parachute training is also provided. The motor of the blower in the safety auxiliary device adopts a speed closed loop, and the drive motor of the traction rope drive system adopts a torque closed loop. A control model of the parachute training auxiliary device is established. The relationship between the speed of the blower motor and the torque of the traction rope motor is obtained from the control model. In order to calibrate the torque correction coefficient of the traction rope motor, a hovering test is carried out for different trainees before training to obtain the calibrated correction coefficient and input it into the control model. Then, parachute training is carried out.

[0026] like Figure 9 As shown, the specific usage process is as follows: S100. Establish a control model for the parachute training auxiliary device; the control model is... F 风 + F 绳 = G 人 ,in, F 风 = ω 2 × A 人 × f 1, ω The motor speed of the blower equipment. F 风 The thrust exerted on a person by the air blown out by a hair dryer. F 绳 The tension exerted by the traction rope on the person. A 人 For the windward area of ​​the trainees, f 1 is a correction factor for the relationship between thrust and motor speed, which is determined by the characteristics of the blower mechanism (such as blade shape and hub shape); F 绳 =2× T ×sin θ × f 2× f a , T The torque of the drive motor for the traction rope drive system. θ The angle between the traction rope and the horizontal plane. f 2 is a correction factor for the relationship between tension and motor torque, determined by the characteristics of the traction rope equipment mechanism (such as the diameter of the winding reel and the reduction ratio of the reducer). f a This is the torque correction coefficient for the drive motor of the traction rope drive system; G 人 The training weight for the trainees; S200, Measure the windward area and training weight of the trainees; S300, Preset drive motor torque correction coefficient f a =1; S400: Enables the trainee to hover at a set altitude, adjusting according to the hovering status. f a value; S500, Input the adjusted correction coefficients into the control model; S600, conduct parachute training.

[0027] In step S400, adjustments are made based on the hovering status. f a The method of value is to observe the personnel, with the goal of keeping the trainer stable at a fixed height; if the personnel descend, the value is increased. f a Conversely, decrease f a .

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A safety auxiliary device for parachute training, characterized in that, include: Main frame, traction ropes, safety net, protective mats, and blower equipment; The main frame consists of several pillars arranged around the perimeter of the protective netting, and the protective netting is connected to the pillars. The protective pad is connected to the support column and located below the protective net. The protective pad has an air outlet area in the center, and the air outlet area has a middle protective net. The blower is located below the protective pad and blows air upwards from the air outlet area; One end of each of the two sets of traction ropes is connected to a traction rope drive system, and the other end is gathered in the central area of ​​the protective net through a steering wheel set on the support post and connected to a carrying strap; The main frame is provided with a top reversing mechanism for reversing the traction rope, as well as a lateral reversing structure and / or a longitudinal reversing mechanism. The traction rope includes a main rope, a secondary rope A and a secondary rope B. The secondary rope A and the secondary rope B are connected to one end of the main rope. The main rope is led out from the traction rope drive system and connected to the secondary rope A and the secondary rope B respectively. The auxiliary rope A is connected to the carrying strap after passing through the top reversing mechanism of a support column. The auxiliary rope B is connected to the carrying strap after passing through the lateral reversing structure of the support column, and then sequentially enters the longitudinal reversing mechanism and the top reversing mechanism of the adjacent support column.

2. The safety auxiliary device for parachute training according to claim 1, characterized in that, A soundproof wall is installed around the blower.

3. The safety auxiliary device for parachute training according to claim 1, characterized in that, The top reversing mechanism includes a steering wheel E, a steering wheel F, a steering wheel G, and a steering wheel H. Steering wheel E is mounted on the vertical surface of the support column. Steering wheels F and G are mounted parallel to each other on the top surface of the support column. Steering wheel H is mounted on the lower end surface of the top of the support column. Steering wheels E and F work together to change the auxiliary rope B from longitudinal to transverse. After entering steering wheel G, the auxiliary rope B is reversed by steering wheel H and then connected to the carrying strap. The lateral reversing structure includes a steering wheel A and a steering wheel B installed on two different vertical surfaces of the support column. After the auxiliary rope B undergoes a longitudinal to lateral reversal through the steering wheel A, it passes through the steering wheel B and then enters the steering wheel C of the longitudinal reversing mechanism. The longitudinal reversing mechanism includes a steering wheel C and a steering wheel D installed on the vertical surface of the support column. The auxiliary rope B passes through the steering wheel B and enters the steering wheel C. After passing through the steering wheel D and undergoing vertical reversal, the rope enters the steering wheel E of the top reversing mechanism. The auxiliary rope A is connected to the shoulder strap after being reversed by the top reversing mechanism.

4. The method of using a safety auxiliary device for parachute training according to any one of claims 1-3, characterized in that, The motor of the blower is controlled by a speed closed-loop control, and the drive motor of the traction rope drive system is controlled by a torque closed-loop control; the method includes: S100. Establish a control model for the parachute training auxiliary device; the control model is... F 风 + F 绳 = G 人 ,in, F 风 The thrust exerted on a person by the air blown out by a hair dryer. F 绳 The tension exerted by the traction rope on the person. G 人 The training weight for the trainees; S200, Measure the windward area and training weight of the trainees; S300, Preset drive motor torque correction coefficient f a =1; S400: Enables the trainee to hover at a set altitude, adjusting according to the hovering status. f a value; S500, Input the adjusted correction coefficients into the control model; S600, conduct parachute training; In step S100 F 风 = ω 2 × A 人 × f 1, ω The motor speed of the blower equipment. A 人 For the windward area of ​​the trainees, f 1 is the correction factor for the relationship between thrust and motor speed.

5. The method of using the safety auxiliary device for parachute training according to claim 4, characterized in that, F 绳 =2× T ×sin θ × f 2× f a , T The torque of the drive motor for the traction rope drive system. θ The angle between the traction rope and the horizontal plane. f 2. Correction factor for the relationship between tension and motor torque. f a This is the torque correction coefficient for the drive motor of the traction rope drive system.

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