Post air supply system for mobile personnel

Abstract

The invention belongs to the technical field of building physical ventilation, and relates to a post air supply system for mobile personnel, which comprises an air port module, an air volume module, a position information sensing module and a control terminal. The control terminal is used for receiving the detected wind speed and the three-dimensional coordinates of the head of the target person, calculating the height angle, the direction angle and the distance from the head of the target person to the spray hole of the spherical spray head according to the three-dimensional coordinates, then calculating the actual wind speed according to the distance, and controlling the wind volume module to adjust the wind speed so that the detected wind speed reaches the actual wind speed; the take-up and pay-off quantity of the three traction steel wires is calculated according to the height angle and the direction angle, and the three take-up and pay-off assemblies are controlled to conduct take-up or pay-off operation according to the take-up and pay-off quantity of the three traction steel wires, so that the air supply direction and the air speed are dynamically adjusted according to the movement of target personnel, workers feel comfortable, complex movement tracks can be covered, and the working efficiency is improved. And the protection effect is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building physics ventilation and relates to a post air supply system for mobile workers. BACKGROUND

[0002] A large amount of harmful liquid droplets, particulate matters and volatile organic compounds discharged in the processing of pickling, casting, vulcanization and printing seriously threaten the health of workers. In the process of spinning and carbon fiber processing, the hot and humid environment with high temperature and high humidity brings adverse experience to the thermal comfort of workers. In order to prevent workers from inhaling excessive toxic and harmful substances and to alleviate the discomfort of workers caused by the adverse hot and humid environment, post air supply needs to be performed on the breathing area of workers, that is, fresh and clean air is continuously delivered to the area in front of the face of workers. At the same time, due to the need of the production process, the position of workers is often not fixed but in a mobile state.

[0003] At present, when air supply is performed on workers in a mobile state, the commonly used air supply system includes an air supply air outlet and a linear reciprocating moving mechanism. The linear reciprocating moving mechanism drives the air supply air outlet to move linearly along a fixed track to realize dynamic air supply on workers on a specific path.

[0004] However, in actual operation, workers not only move along a linear path but also frequently perform non-linear behaviors such as turning, staying and turning around. Therefore, it is difficult to cover the complex motion track by using linear reciprocating movement for air supply. At the same time, the air supply airflow rapidly decays with the increase of distance. If the air supply speed is not dynamically adjusted according to the real-time position of workers, the airflow at the near end is too strong to cause discomfort of blowing air, and the airflow at the far end is insufficient to lose the protection effect. SUMMARY

[0005] The application aims to provide a post air supply system for mobile workers, which can dynamically adjust the air supply angle and speed according to the motion track of workers, not only to make workers feel comfortable but also to cover complex motion tracks and improve the protection effect.

[0006] To achieve the above-mentioned purpose, the technical solution provided by the application is as follows. A post air supply system for mobile workers, comprising: An air outlet module, comprising a spherical nozzle, a base and three traction steel wires, a spray hole is formed through the spherical nozzle, a spherical groove is formed in the base, the spherical nozzle is rotationally and sealingly arranged in the spherical groove and one end of the spray hole is located outside the spherical groove, three connecting pieces are uniformly arranged on the spherical nozzle in the circumferential direction, one end of each of the three traction steel wires is fixedly connected with one of the three connecting pieces, and the other end of each of the three traction steel wires is connected with; An air volume module connected with the spherical groove, used for air supply into the spherical groove, detection of air speed and adjustment of air speed. A position information sensing module is arranged near the spherical nozzle and is used to obtain the three-dimensional coordinates of the head of the target person. A control terminal is electrically connected with the three take-up and pay-off assemblies, the air volume module and the position information sensing module, and is used to receive the wind speed and the three-dimensional coordinates, calculate the height angle, the direction angle and the distance of the head of the target person from the spray hole of the spherical nozzle according to the three-dimensional coordinates, calculate the actual wind speed according to the distance, control the air volume module to adjust the wind speed so that the detected wind speed reaches the actual wind speed, calculate the take-up and pay-off amounts of the three traction wires according to the height angle and the direction angle, and control the three take-up and pay-off assemblies to perform take-up or pay-off operations according to the take-up and pay-off amounts of the three traction wires, so as to dynamically adjust the air supply direction and the wind speed according to the movement of the target person.

[0007] The application also has the following characteristics: Each take-up and pay-off assembly comprises a stepper motor arranged on the side surface of the base, a limiting hole channel formed in the base near the stepper motor, the limiting hole channel being arranged along the length direction of the base and having an open structure at the end close to the positioning bolt, the output end of the stepper motor being located in the limiting hole channel after penetrating through the side surface of the base, the traction wire being located in the limiting hole channel, and the stepper motor being electrically connected with the control terminal.

[0008] The air volume module comprises a wind pipe having one end connected with the end of the base away from the spherical groove, the other end of the wind pipe being connected with an air supply device, an air supply channel being formed in the base and being in communication with the wind pipe and the spherical groove, a circular air valve being arranged in the wind pipe and being rotatably connected with the wind pipe through a rotating shaft, the diameter of the circular air valve being the same as the inner diameter of the wind pipe, a rotary actuator being arranged on the side surface of the wind pipe and having an output end connected with the rotating shaft, the rotary actuator being electrically connected with the control terminal, and a wind speed measurement probe being arranged in the wind pipe and located between the circular air valve and the base, the wind speed measurement probe being electrically connected with the control terminal.

[0009] The wind pipe and the base are connected through a hose.

[0010] The position information sensing module comprises a person position monitor used to obtain the three-dimensional coordinates of the head of the target person.

[0011] The control terminal comprises: an information processor, which is electrically connected with a wind speed measuring probe and a personnel position monitor, and is used for receiving wind speed and three-dimensional coordinates, calculating height angle, direction angle and distance of a head of a target person from a spray hole of a spherical nozzle according to the three-dimensional coordinates, calculating actual wind speed according to the distance, and calculating the amount of retraction and extension of three traction wires according to the height angle and the direction angle; a wind valve opening controller, which is electrically connected with a rotary actuator, and is used for controlling the rotary actuator to drive a circular wind valve to rotate according to the actual wind speed, so that the detected wind speed reaches the actual wind speed; and a wind direction controller, which is electrically connected with three stepping motors, and is used for controlling the three stepping motors to perform retraction or extension operation according to the amount of retraction and extension of the three traction wires.

[0012] The control terminal is provided with a power supply module, which is electrically connected with the information processor, the wind valve opening controller, the wind direction controller, the wind speed measuring probe, the personnel position monitor, the rotary actuator and the three stepping motors.

[0013] When the height angle, the direction angle and the distance of the head of the target person from the spray hole of the spherical nozzle are calculated according to the three-dimensional coordinates, the following formula is used: , In the formula, (x0, y0, z0) is the three-dimensional coordinates of the spray hole of the spherical nozzle, x 1 ，y 1 ，z 1) is the three-dimensional coordinates of the head of the target person, l is the distance of the head of the target person from the spray hole of the spherical nozzle, and α is the height angle of the head of the target person from the spray hole of the spherical nozzle, and β is the direction angle of the head of the target person from the spray hole of the spherical nozzle.

[0014] When the actual wind speed is calculated according to the detected wind speed and the distance, the following formula is used: , In the formula, u 0 is the wind speed at the outlet of the spray hole, α is a dimensionless turbulence coefficient, and is taken as 0.07, x is the distance between the target person and the spherical nozzle, d 0 is the inner diameter of the spray hole, u is the actual wind speed, d is the inner diameter of the air pipe.

[0015] When the amount of retraction and extension of the three traction wires is calculated according to the height angle and the direction angle, the rotation angle of the three stepping motors is also calculated, and the following formula is used: , In the formula, h 1, h 2, h 3 are the amount of retraction and extension of the three traction wires, θ1、 θ 2、 θ 3 rotation angle of three stepping motors respectively, α is the height angle between the target personnel face breathing area and the spherical nozzle, β is the direction angle between the target personnel face breathing area and the spherical nozzle, R is the radius of the spherical nozzle, r is the radius of the winding drum.

[0016] The post air supply system for moving personnel of the present application has the following advantages: The present application utilizes the control terminal to receive the detected wind speed and the three-dimensional coordinates of the target personnel head, calculates the height angle, direction angle and distance from the spherical nozzle nozzle hole of the target personnel head according to the three-dimensional coordinates, calculates the actual wind speed according to the distance, controls the air volume module to adjust the wind speed so that the detected wind speed reaches the actual wind speed, at the same time, calculates the winding and unwinding amount of the three traction wires according to the height angle and direction angle, and controls the three winding and unwinding assemblies to perform winding or unwinding operation respectively according to the winding and unwinding amount of the three traction wires, so as to dynamically adjust the air supply direction and wind speed according to the movement of the target personnel, not only makes the worker feel comfortable, but also can cover complex motion trajectory, improves the protection effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure schematic diagram of the present application.

[0018] Figure 2 is the exploded view of the air outlet module in the present application.

[0019] Figure 3 is the structure schematic diagram of the air outlet module in the present application.

[0020] Figure 4 is the top view structure schematic diagram of the air outlet module in the present application.

[0021] Figure 5 is the front view structure schematic diagram of the air outlet module in the present application.

[0022] Figure 6 is the structure schematic diagram of the winding drum and the traction wire connection in the present application.

[0023] Figure 7 is the structure schematic diagram of the air outlet module after adjusting the angle in the present application.

[0024] Figure 8 is the structure schematic diagram of the air outlet module and the air volume module connection in the present application.

[0025] Figure 9 is the structure schematic diagram of the air pipe in the present application.

[0026] Figure 10 Fig. 1 is a schematic diagram of the structure of the control terminal in the present application.

[0027] Figure 11 Fig. 2 is a schematic diagram of the structure when actually blowing in the present application.

[0028] Reference signs: 1, air outlet module, 101, positioning bolt, 111, traction steel wire, 121, limiting hole channel, 131, stepping motor, 141, annular top cover, 151, spherical nozzle, 161, base, 171, winding drum, 2, air volume module, 200, hose, 201, air pipe, 202, circular air valve, 203, rotary actuator, 204, air speed measurement probe, 3, position information sensing module, 301, personnel position monitor, 4, control terminal, 401, information processor, 402, air valve opening controller, 403, air direction controller, 404, power supply module. DETAILED DESCRIPTION

[0029] The technical solutions in the present application will be described clearly and exhaustively below in combination with the drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B: "and / or" in the text is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, and B exists alone, in addition, in the description of the embodiments of the present application, "multiple" means two or more than two. The following terms "first" "second" are only for the purpose of description, and cannot be understood as implying or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" "second" can explicitly or implicitly include one or more features.

[0030] As Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the present application provides a post air supply system for mobile personnel, which comprises a air outlet module 1, an air volume module 2, a position information sensing module 3 and a control terminal 4. The air outlet module 1 comprises a spherical nozzle 151, a base 161 and three traction steel wires 111. The spherical nozzle 151 is provided with a spray hole penetratingly formed thereon. The base 161 is provided with a spherical groove. The spherical nozzle 151 is rotationally and sealingly arranged in the spherical groove with one end of the spray hole located outside the spherical groove. The spherical groove is communicated with the outside through the spray hole, so as to facilitate the air supply from the spherical groove, the spray hole to the outside. Three connecting pieces are uniformly arranged on the spherical nozzle 151 along the circumference thereof. One end of each of the three traction steel wires 111 is fixedly connected with the corresponding connecting piece. The other end of each of the three traction steel wires 111 is connected with a take-up and pay-off assembly. The take-up and pay-off assembly is used for take-up or pay-off operation of the traction steel wire 111. The air volume module 2 is connected with the spherical groove. The air volume module 2 is used for air supply into the spherical groove, detection of air speed and adjustment of air speed. The position information sensing module 3 is arranged at a position close to the spherical nozzle 151. The position information sensing module 3 is used for obtaining the three-dimensional coordinates of the head of the target personnel. The control terminal 4 is electrically connected with the three take-up and pay-off assemblies, the air volume module 2 and the position information sensing module 3. The control terminal 4 is used for receiving the air speed and the three-dimensional coordinates. The height angle, the direction angle and the distance of the head of the target personnel from the spray hole of the spherical nozzle 151 are calculated according to the three-dimensional coordinates. The actual air speed is calculated according to the distance. The air volume module 2 is controlled to adjust the air speed so that the detected air speed reaches the actual air speed. The take-up or pay-off amount of each of the three traction steel wires 111 is calculated according to the height angle and the direction angle. The three take-up and pay-off assemblies are controlled to perform take-up or pay-off operation according to the take-up or pay-off amount of each of the three traction steel wires 111, so as to adjust the air supply angle and the air speed according to the movement of the target personnel. The control terminal 4 receives the detected air speed and the three-dimensional coordinates of the head of the target personnel. The height angle, the direction angle and the distance of the head of the target personnel from the spray hole of the spherical nozzle 151 are calculated according to the three-dimensional coordinates. The actual air speed is calculated according to the distance. The air volume module 2 is controlled to adjust the air speed so that the detected air speed reaches the actual air speed. The take-up or pay-off amount of each of the three traction steel wires 111 is calculated according to the height angle and the direction angle. The three take-up and pay-off assemblies are controlled to perform take-up or pay-off operation according to the take-up or pay-off amount of each of the three traction steel wires 111, so as to dynamically adjust the air supply direction and the air speed according to the movement of the target personnel. The worker feels comfortable. The complex movement track can be covered. The protection effect is improved.

[0031] As Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 Each connecting piece is a positioning bolt 101. The positioning bolt 101 is arranged on the spherical nozzle 151 and located close to the spray hole. The positioning bolt 101 is located outside the spherical groove. One end of each of the three traction steel wires 111 is fixedly connected with the corresponding positioning bolt 101.

[0032] As Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 shown, each pay-off assembly comprises: a stepper motor 131 and a winding drum 171, the stepper motor 131 is arranged on the side of the base 161, a limiting hole 121 is arranged in the base 161 near the stepper motor 131, the limiting hole 121 is arranged along the length direction of the base 161 and is open at the end close to the positioning bolt 101, the output end of the stepper motor 131 passes through the side of the base 161 and is located in the limiting hole 121, the traction steel wire 111 is located in the limiting hole 121, the stepper motor 131 is electrically connected with the control terminal 4, the winding drum 171 is sleeved on the output end of the stepper motor 131, the winding drum 171 is located in the limiting hole 121, and the other end of each traction steel wire 111 is connected with the winding drum 171 and wound on the winding drum 171.

[0033] As Figure 2 , Figure 3 shown, the annular top cover 141 is sleeved on the spherical nozzle 151, the annular top cover 141 is fixedly connected with the base 161, the spherical nozzle 151 is in sliding sealing connection with the annular top cover 141, the spherical nozzle 151 is limited by the annular top cover 141, so that the spherical nozzle 151 is prevented from coming out of the spherical groove, and each traction steel wire 111 passes through the side of the annular top cover 141.

[0034] As Figure 8 , Figure 9 shown, the air volume module 2 comprises an air pipe 201, a circular air valve 202, a rotary actuator 203 and an air speed measurement probe 204, one end of the air pipe 201 is connected with the end of the base 161 away from the spherical groove, the other end of the air pipe 201 is connected with a air supply device, the air supply device is used for sending air into the air pipe 201, an air supply channel is arranged in the base 161, the air supply channel is in communication with the air pipe 201 and the spherical groove respectively, the circular air valve 202 is arranged in the air pipe 201 and is in rotary connection with the air pipe 201 through a rotating shaft, the diameter of the circular air valve 202 is the same as the inner diameter of the air pipe 201, the rotary actuator 203 is arranged on the side of the air pipe 201, the output end of the rotary actuator 203 is connected with the rotating shaft, the rotary actuator 203 is electrically connected with the control terminal 4, and the air speed measurement probe 204 is arranged in the air pipe 201 and located between the circular air valve 202 and the base 161. The air speed measurement probe 204 is electrically connected with the control terminal 4.

[0035] As Figure 8 shown, the air pipe 201 and the base 161 are connected through a hose 200.

[0036] As Figure 1 , Figure 10As shown in the figure, the position information perception module 3 comprises a personnel position monitor 301 for acquiring the three-dimensional coordinates of the head of the target personnel, which is preferably one of Kinect V1, Kinect V2 and a depth camera. Kinect V1 and Kinect V2 are motion sensors launched by Microsoft in 2010 and 2014 respectively, which realize the acquisition of three-dimensional coordinates through depth sensor technology. The depth camera comprises an infrared emitter and an infrared receiver to acquire the three-dimensional coordinates of the head of the target personnel.

[0037] As shown in the figure, Figure 10 The control terminal 4 comprises an information processor 401, a wind valve opening controller 402 and a wind direction controller 403. The information processor 401 is electrically connected with the wind speed measuring probe 204 and the personnel position monitor 301. The information processor 401 is used to receive the wind speed and the three-dimensional coordinates, calculate the height angle, the direction angle and the distance from the head of the target personnel to the spray hole of the spherical spray head 151 according to the three-dimensional coordinates, calculate the actual wind speed according to the distance, calculate the amount of retraction and release of the three traction steel wires 111 according to the height angle and the direction angle, and the wind valve opening controller 402 is electrically connected with the rotary actuator 203. The wind valve opening controller 402 is used to control the rotary actuator 203 to rotate the circular wind valve 202 according to the actual wind speed, so that the detected wind speed reaches the actual wind speed. The wind direction controller 403 is electrically connected with the three stepping motors 131. The wind direction controller 403 is used to control the three stepping motors 131 to perform the take-up or release operation according to the amount of retraction and release of the three traction steel wires 111.

[0038] The information processor 401 is composed of an AMD Ryzen 7 CPU, an NVIDIA GeForce RTX 30 GPU, a 16GB DDR4 memory and a RAID array storage, which guarantees the accurate analysis of the position of the post worker and the rapid decision of the control. The data transmission is through a shielded twisted pair, and the data transmission rate of the personnel position and the pipeline wind speed is 100 Mbps.

[0039] As shown in the figure, Figure 10 The control terminal 4 is provided with a power supply module 404, which is electrically connected with the information processor 401, the wind valve opening controller 402, the wind direction controller 403, the wind speed measuring probe 204, the personnel position monitor 301, the rotary actuator 203 and the three stepping motors 131. The power supply module 404 is used to supply power to the information processor 401, the wind valve opening controller 402, the wind direction controller 403, the wind speed measuring probe 204, the personnel position monitor 301, the rotary actuator 203 and the three stepping motors 131.

[0040] As shown in the figure, Figure 11As shown, according to the three-dimensional coordinate calculation target personnel head distance spherical nozzle 151 spray hole height angle, direction angle and distance, the following formula is used: .

[0041] In the formula, (x0, y0, z0) is the three-dimensional coordinates of the spherical nozzle 151 spray port, x 1 ，y 1 ，z 1) is the three-dimensional coordinates of the target personnel head, l is the distance between the target personnel head and the spherical nozzle 151 spray hole, α is the height angle of the target personnel head to the spherical nozzle 151 spray hole, and β is the direction angle of the target personnel head to the spherical nozzle 151 spray hole.

[0042] As shown in Figure 6 , Figure 7 , the following formula is used to detect the wind speed and distance to calculate the actual wind speed: .

[0043] In the formula, u 0 is the exit velocity of the spray hole, with units of m / s, α is the dimensionless turbulence coefficient, which is 0.07, x is the distance between the target personnel and the spherical nozzle 151, with units of m, d 0 is the inside diameter of the spray hole, with units of m, u is the actual wind speed, with units of m / s, d is the inside diameter of the air pipe 201, with units of m.

[0044] As shown in Figure 11 , according to the height angle and direction angle, the retraction and extension amounts of the three traction steel wires 111 are calculated, and the rotation angles of the three step motors 131 are calculated, using the following formula: .

[0045] In the formula, h 1, h 2, h 3 are the retraction and extension amounts of the three traction steel wires 111, θ 1, θ 2, θ 3 are the rotation angles of the three step motors 131, α is the height angle between the target personnel's face breathing area and the spherical nozzle 151, β is the direction angle between the target personnel's face breathing area and the spherical nozzle 151, R is the radius of the spherical nozzle 151, with units of m, r is the radius of the winding drum 171, with units of m.

[0046] like Figure 11 As shown, there are two ways to arrange the base 161. One is to fix the base 161 to a vertical wall so that the initial air supply direction of the spherical nozzle 151 is horizontal. The other is to fix the base 161 to the lower wall of the static pressure box so that the initial air supply direction of the spherical nozzle 151 is vertical.

[0047] When the initial airflow direction is neither horizontal nor vertical, it is converted to the case where the initial airflow direction is horizontal or vertical through coordinate system rotation, so as to facilitate the adjustment of the spherical nozzle angle 151. The actual coordinates P (with the horizontal ground as the reference plane (xoy)) are then used. x , y , z The coordinates P' are transformed using the rotation matrix M, with the top surface (141) of the spherical nozzle as the reference plane (xoy). x ', y ', z '), and have: Three-dimensional Cartesian coordinate system transformation formula: .

[0048] Rotation matrix: .

[0049] The relevant parameters of the rotation matrix M can be directly obtained by using an angle measuring instrument, a level, and a distance measuring instrument. Among them: column i represents the representation of the x-axis unit vector of coordinate system P in coordinate system P'; column j represents the representation of the y-axis unit vector of coordinate system P in coordinate system P'; column k represents the representation of the z-axis unit vector of coordinate system P in coordinate system P'; and column t represents the representation of the origin of coordinate system P' in coordinate system P'.

[0050] Furthermore, based on the calculation formula for the rotation angle of stepper motor 131, the rotation angle of each of the three stepper motors when the initial airflow direction is not horizontal can be calculated. θ 1. θ 2. θ 3.

[0051] Working principle: start the air supply device, send air into the air pipe 201, the wind speed measuring probe 204 detects the wind speed in real time, the personnel position monitor 301 monitors the position of the target personnel in real time, obtains the height angle, direction angle and distance of the target personnel and the spray hole of the spherical nozzle 151, the information processor 401 receives the detected wind speed, height angle, direction angle and distance in real time, calculates the actual wind speed according to the distance, the wind valve opening controller 402 controls the rotary actuator 203 to drive the circular air valve 202 to rotate according to the actual wind speed, so that the detected wind speed reaches the actual wind speed, and the wind speed is maintained at 0.3m / s when the wind blows near the target personnel, at the same time, the information processor 401 calculates the reeling and unreeling amount of the three traction steel wires 111 and the rotation angle of the three stepping motors 131 according to the height angle and the direction angle, the wind direction controller 403 controls the three stepping motors 131 to rotate at the corresponding angle according to the rotation angle of the three stepping motors 131, drives the corresponding traction steel wire 111 to reel or unreel, thereby driving the spherical nozzle 151 to rotate in the spherical groove, adjusts the spherical nozzle 151 to the corresponding angle, and dynamically adjusts the air supply direction and wind speed according to the movement of the target personnel.

[0052] It can be understood that the present application is described by some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to the features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, the features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the present application.

Claims

1. A workstation air supply system for mobile personnel, characterized in that, include: The air outlet module includes a spherical nozzle, a base, and three traction steel wires. The spherical nozzle has a through-hole, and the base has a spherical groove. The spherical nozzle is rotatably sealed inside the spherical groove, and one end of the nozzle is located outside the spherical groove. Three connectors are evenly arranged around the circumference of the spherical nozzle. One end of each of the three traction steel wires is fixedly connected to the three connectors, and the other end of each of the three traction steel wires is connected to a wire take-up and release assembly. The air volume module, connected to the spherical groove, is used to deliver air into the spherical groove while detecting and adjusting the air velocity. The location information sensing module is positioned near the spherical nozzle to acquire the three-dimensional coordinates of the target person's head; The control terminal is electrically connected to three wire take-up and release components, an air volume module, and a position information sensing module. It receives wind speed and three-dimensional coordinates, calculates the height angle, direction angle, and distance of the target person's head from the spherical nozzle orifice based on the three-dimensional coordinates, calculates the actual wind speed based on the distance, and controls the air volume module to adjust the wind speed so that the detected wind speed reaches the actual wind speed. At the same time, it calculates the take-up and release amount of the three traction steel wires based on the height angle and direction angle, and controls the three wire take-up and release components to perform wire take-up or release operations based on the take-up and release amount of the three traction steel wires, thereby dynamically adjusting the air supply direction and wind speed according to the movement of the target person.

2. The on-site air supply system for mobile personnel according to claim 1, characterized in that, Each of the aforementioned take-up and unwinding assemblies includes: a stepper motor disposed on the side of the base, a limiting channel being formed in the base near the stepper motor, the limiting channel being arranged along the length of the base and having an open structure near the end of the positioning bolt, the output end of the stepper motor passing through the side of the base and located within the limiting channel, the traction wire being located within the limiting channel, and the stepper motor being electrically connected to a control terminal; and a winding drum, sleeved on the output end of the stepper motor and located within the limiting channel, the other end of each traction wire being connected to the winding drum and wound around the winding drum.

3. The on-site air supply system for mobile personnel according to claim 2, characterized in that, The air volume module includes: an air duct, one end of which is connected to the end of the base away from the spherical groove, and the other end of which is connected to an air supply device. An air supply channel is provided inside the base, and the air supply channel is connected to the air duct and the spherical groove respectively; a circular air valve, which is installed inside the air duct and is rotatably connected to the air duct via a rotating shaft, and the diameter of the circular air valve is the same as the inner diameter of the air duct; a rotary actuator, which is installed on the side of the air duct, and the output end of the rotary actuator is connected to the rotating shaft. The rotary actuator is electrically connected to a control terminal; and a wind speed measuring probe, which is installed inside the air duct and located between the circular air valve and the base, and the wind speed measuring probe is electrically connected to the control terminal.

4. A workstation air supply system for mobile personnel according to claim 3, characterized in that, The air duct is connected to the base via a flexible hose.

5. A workstation air supply system for mobile personnel according to claim 3, characterized in that, The location information sensing module includes: a personnel location monitor, used to acquire the three-dimensional coordinates of the target personnel's head.

6. A workstation air supply system for mobile personnel according to claim 5, characterized in that, The control terminal includes: an information processor, electrically connected to the wind speed measurement probe and the personnel position monitor, for receiving wind speed and three-dimensional coordinates, calculating the height angle, direction angle, and distance of the target personnel's head from the spherical nozzle orifice based on the three-dimensional coordinates, and then calculating the actual wind speed based on the distance. Simultaneously, it calculates the take-up and release amount of the three traction steel wires based on the height angle and direction angle; an air valve opening controller, electrically connected to the rotary actuator, for controlling the rotary actuator to drive the circular air valve to rotate according to the actual wind speed, so that the detected wind speed reaches the actual wind speed; and a wind direction controller, electrically connected to the three stepper motors, for controlling the three stepper motors to perform take-up or release operations respectively according to the take-up and release amount of the three traction steel wires.

7. A workstation air supply system for mobile personnel according to claim 6, characterized in that, The control terminal is equipped with a power supply module, which is electrically connected to the information processor, the air valve opening controller, the wind direction controller, the wind speed measuring probe, the personnel position monitor, the rotary actuator, and three stepper motors.

8. A workstation air supply system for mobile personnel according to claim 6, characterized in that, When calculating the height angle, direction angle, and distance of the target person's head from the nozzle of the spherical nozzle based on three-dimensional coordinates, the following formula is used: ， In the formula, is the three-dimensional coordinate of the spherical nozzle, and is the three-dimensional coordinate of the target person's head. l Let α be the distance between the target person's head and the nozzle of the spherical nozzle, β be the elevation angle between the target person's head and the nozzle of the spherical nozzle, and β be the directional angle between the target person's head and the nozzle of the spherical nozzle.

9. A workstation air supply system for mobile personnel according to claim 6, characterized in that, When calculating the actual wind speed based on the detected wind speed and distance, the following formula is used: ， In the formula, u 0 represents the nozzle outlet velocity, and α represents the dimensionless turbulence coefficient, taken as 0.

07. x The distance between the target personnel and the spherical nozzle. d 0 represents the inner diameter of the nozzle. u This refers to the actual wind speed. d This refers to the inner diameter of the duct.

10. A workstation air supply system for mobile personnel according to claim 6, characterized in that, While calculating the take-up and release amount of the three traction steel wires based on the elevation angle and direction angle, the rotation angle of the three stepper motors is also calculated using the following formula: ， In the formula, h 1. h 2. h 3 represents the take-up and release amounts of the three traction steel wires. θ 1. θ 2. θ 3 represents the rotation angle of the three stepper motors. α The elevation angle between the target person's facial breathing area and the spherical nozzle. β The directional angle between the target person's facial breathing area and the spherical nozzle. R Let be the radius of the spherical nozzle. r The radius of the spool is [ratio].

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