Treadmill for testing cardiopulmonary function and method for providing running posture analysis data

Abstract

The invention discloses a cardiopulmonary function test treadmill and a method for providing running posture analysis data, and solves the problems that part of existing treadmills cannot meet cardiopulmonary test requirements of small up-down vibration, stable gradient, accurate adjustment and multiple test modes, cannot provide running posture analysis data, and cannot be used for testing the cardiopulmonary function. And the use safety is relatively low. Comprising a running machine body, four pressure sensors arranged on the running machine body, a protection frame arranged outside the running machine body, a tension sensor type safety lock and a display screen which are arranged on the protection frame, an armrest frame arranged on the running machine body, a pressing type safety lock and a liquid crystal touch control computer which are arranged on the armrest frame, and a system comprehensive controller. According to the method, data support is provided for running posture analysis; various running modes can be provided, up-down vibration is small, the gradient is stable, adjustment is accurate, and the cardiopulmonary test requirement is met; by arranging a protection frame and a tension sensor type safety lock, the safety of the personnel in the cardiopulmonary function testing process is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of fitness equipment, and in particular relates to a treadmill for testing cardiopulmonary function and a method for providing running posture analysis data. Background Art

[0002] A treadmill is an indoor fitness equipment used for running exercises indoors. The use of treadmills breaks through the limitations of weather, traffic or time, and facilitates people's lives. In order to ensure the safety of the treadmill, the treadmill is usually equipped with a lock. When the runner suddenly loses balance and is about to fall or needs to stop urgently, the lock can be quickly pressed to stop the treadmill immediately. The problems of some existing treadmills are: runners may lose balance due to fatigue when exercising on the treadmill for a long time. If the runner reacts slowly or fails to find the correct lock position, resulting in the failure to press the lock in time, the running treadmill will cause harm to the runner who falls, which is less safe. When the runner's speed reaches or approaches the maximum speed, the runner runs at full speed, which further increases the risk of the runner falling due to fatigue. When the treadmill is used to test cardiopulmonary function, it must meet the requirements of small up and down vibration during the running process, stable slope and accurate adjustment, and multiple test methods such as uphill running, flat running and downhill running. However, the existing treadmills are difficult to meet these requirements and cannot provide data for running posture analysis. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a treadmill for testing cardiopulmonary function and a method for analyzing running posture data, so as to at least solve some of the above technical problems.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A cardiopulmonary function test treadmill comprises a treadmill body, four pressure sensors arranged at the four corners of the bottom of the treadmill body, a protection frame arranged outside the treadmill body, a tension sensor type safety lock and a display screen arranged on the protection frame, an armrest frame arranged on the treadmill body, a push-type safety lock and a liquid crystal touch computer arranged on the armrest frame, and a system integrated controller arranged on the armrest frame and connected to the treadmill body, the pressure sensor, the tension sensor type safety lock, the display screen, the push-type safety lock and the liquid crystal touch computer.

[0006] Furthermore, the treadmill body includes a mounting frame, a transmission mechanism disposed on the mounting frame, a running belt sleeved on the transmission mechanism, and a slope adjustment mechanism disposed on one end of the mounting frame;

[0007] The slope adjustment mechanism includes a support plate with one end slidingly supported on the ground and the other end rotatably arranged at the bottom of the mounting frame, and a driving mechanism arranged on the support plate and connected to the mounting frame to drive one end of the mounting frame to move; the transmission mechanism and the driving mechanism are respectively connected to the system integrated controller.

[0008] Furthermore, the driving mechanism includes two electric push rods rotatably arranged on the support plate and connected to the mounting frame; the transmission mechanism includes a variable frequency motor arranged on one end of the mounting frame, a transmission roller rotatably arranged on one end of the mounting frame and connected to the drive shaft of the variable frequency motor, and a support roller rotatably arranged on the other end of the mounting frame; the treadmill is arranged between the transmission roller and the support roller; the electric push rod and the variable frequency motor are respectively connected to the system integrated controller.

[0009] Furthermore, the protection frame includes a base frame arranged at the bottom of the treadmill body, two protection support rods respectively arranged on both sides of the base frame, an arc-shaped connecting rod arranged between the two protection support rods, a mounting seat arranged on the arc-shaped connecting rod for installing a tension sensor type safety lock, a mounting rod arranged between the two protection support rods, a rectangular mounting frame arranged on the mounting rod for installing a display screen, an auxiliary support rod arranged on the base frame and connected to the protection support rod, a reinforcement rod arranged between the protection support rod and the auxiliary support rod, and a horizontal connecting rod arranged between the two reinforcement rods.

[0010] Furthermore, a safety rope for applying tension to the tension sensor type safety lock is connected to the tension sensor type safety lock, and a protective belt for fixing on the runner is provided on the safety rope.

[0011] Furthermore, two first legs and two second legs are provided at the four corners of the treadmill body, the two first legs are located at one end of the treadmill body, and the two second legs are located at the other end of the treadmill body, and four pressure sensors are installed one by one at the bottom of the two first legs and the two second legs.

[0012] Further, the first leg includes a mounting tube arranged on the treadmill body, a threaded extension tube inserted into the mounting tube, a first threaded column threadedly connected to the threaded extension tube, a first base arranged at the bottom of the first threaded column and located outside the mounting tube, and a threaded pin threadedly connected to the mounting tube and inserted into the threaded extension tube; the corresponding pressure sensor is installed at the bottom of the first base;

[0013] A plurality of latch through holes connected to the inner cavity of the threaded extension tube are provided in the length direction of the threaded extension tube, and a threaded through hole matched with the threaded pin is provided on the mounting tube. The threaded pin includes a handle block, a threaded block arranged on the handle block and matched with the threaded through hole, and a pin rod arranged on the threaded block and matched with the latch through hole. The threaded block is threadedly connected in the threaded through hole, and the pin rod is inserted in the latch through hole.

[0014] Furthermore, the second leg includes a mounting block arranged on the treadmill body, a threaded connection hole opened in the mounting block, a second threaded column threadedly connected to the threaded connection hole, and a second base arranged at the bottom of the second threaded column; the corresponding pressure sensor is installed at the bottom of the second base.

[0015] Furthermore, the system integrated controller includes a protection box arranged on the handrail frame, and a single-chip microcomputer arranged in the protection box, and the treadmill body, pressure sensor, tension sensor type safety lock, display screen, push-type safety lock and LCD touch computer are respectively connected to the single-chip microcomputer.

[0016] A method for providing running posture analysis data on a treadmill for cardiopulmonary function testing: based on four pressure sensors distributed at the four corners of a treadmill body, a pressure sensing area bounded by the four pressure sensors is formed on the treadmill body, a runner applies pressure to the pressure sensing area during running on a treadmill belt, the pressure application point where the runner applies pressure to the pressure sensing area changes dynamically with the running, the distances between the four pressure sensors and the pressure application point are different, the closer the distance between the pressure sensor and the pressure application point is, the greater the pressure sensed by the pressure sensor is, during the runner's running, the four pressure sensors sense the pressure applied to the pressure sensing area by the runner in real time, and simultaneously transmit the sensed information to a single-chip microcomputer in real time, the single-chip microcomputer stores the pressure values ​​sensed by the four pressure sensors at the same time, and transmits the pressure values ​​to a display screen for display;

[0017] The position change of the pressure application point where the runner applies pressure to the pressure sensing area reflects the change of the center of gravity projection of the runner in the pressure sensing area. During the runner's running, the center of gravity projection on the pressure sensing area changes continuously. The pressure values ​​sensed by the four pressure sensors change with the change of the center of gravity projection. The change of the center of gravity projection of the runner during the running process can be reversely judged according to the change of the pressure values ​​sensed by the four pressure sensors. The change of the pressure values ​​sensed by the four pressure sensors provides data support for judging the change of the center of gravity projection of the runner during the running process.

[0018] The single chip simultaneously receives and stores the pressure values ​​sensed by the four pressure sensors, and records the time nodes when the pressure sensors transmit pressure twice in a row. The time node reflects the time interval between the runner's two consecutive pressure applications to the running belt. The runner's step frequency can be determined based on the change in the time interval. At the same time, the runner's air time can be calculated based on the pressure change during the running process, and then the runner's air height can be calculated. The regularity, repeatability and stability of the person's steps can be determined based on the time interval between the runner's two consecutive pressure applications to the running belt, the runner's step frequency, the runner's air time, the runner's air height and the change in the runner's center of gravity projection. Therefore, the time node when the pressure sensor senses the pressure, the sensed pressure value, and the change in the sensed pressure value as the running progresses provide data support for the analysis of the running posture.

[0019] Every time a runner runs, he or she adjusts the speed of the running belt on the treadmill body through the LCD touch computer, and the single-chip computer records the movement data of the person during the running process. The movement data includes the exercise time from the start to the end of the running, the movement speed of the running belt, the slope of the treadmill, the time point when the pressure sensor senses the pressure, and the pressure values ​​transmitted by the four pressure sensors. The recorded movement data is transmitted to the display screen for display, and the data displayed on the display screen can provide data support for running posture analysis;

[0020] During the runner's cardiopulmonary function test, the safety rope of the tension sensor type safety lock located on the treadmill safety protection frame is tied around the runner's waist. If the runner has an abnormal running posture or the body tilts and tends to fall during running, the tension sensor type safety lock is subjected to tension and transmits the tension to the microcontroller. The microcontroller stops the treadmill belt based on the information transmitted by the tension sensor type safety lock, ensuring the safety of the personnel during the testing process.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention has a simple structure, a scientific and reasonable design, and is easy to use. The pressure sensor of the present invention senses the time node of pressure, the sensed pressure value, and the change of the sensed pressure value as running progresses, providing data support for running posture analysis; the slope adjustment mechanism of the present invention composed of double electric push rods can enable the treadmill body to provide positive slope, horizontal slope, and negative slope, thereby realizing the test requirements of uphill running, flat running, and downhill running. At the same time, the double electric push rod structure makes the treadmill body more stable and has small vibration, and provides accurate slope adjustment for the treadmill body, realizing the test requirements of small up and down vibration during running, stable slope, and accurate adjustment; during the running process of a person, when the runner reaches his or her maximum speed and has an abnormal running posture due to fatigue and has a risk of falling, the tension sensor type safety lock arranged on the protective frame outside the treadmill body will be triggered, and the single-chip microcomputer in the system integrated controller will urgently control the running belt to stop moving, thereby ensuring the safety of the cardiopulmonary function test process of the person. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the connection between the treadmill body and the handrail frame.

[0025] Figure 3 This is a schematic diagram of the protection frame structure.

[0026] Figure 4 for Figure 1 Magnified view of area C in .

[0027] Figure 5 This is a schematic diagram of the structure of the first leg.

[0028] Figure 6 Schematic diagram of the structure of the second leg.

[0029] Figure 7 This is a schematic diagram of the interior of the treadmill body.

[0030] Figure 8 It is a schematic diagram of the electric push rod connected between the support plate and the connecting seat.

[0031] Fig. 9 It is a schematic diagram of the treadmill body when the mounting frame is parallel to the ground.

[0032] Fig.10 A schematic diagram of the connection between the mounting frame and the support plate.

[0033] Fig.11 It is a schematic diagram of the electric push rod rotating on the support plate.

[0034] Fig.12Schematic diagram of the tensioning mechanism tensioning the drive belt.

[0035] Fig.13 This is a schematic diagram of an electric push rod rotating and penetrating a support rod.

[0036] Fig.14 It is a schematic diagram of the tensioning wheel rotatably arranged on the second supporting frame.

[0037] Fig.15 A top view of the support rod fixed between two connecting plates.

[0038] Fig.16 It is a schematic diagram of the threaded rod being limited in the limiting cylinder.

[0039] Fig.17 This is a structural block diagram of the connection between the microcontroller and other devices.

[0040] The names corresponding to the reference numerals are:

[0041] 1-mounting frame, 2-support plate, 3-electric push rod, 4-second support frame, 5-roller, 6-connecting rod, 7-bearing seat, 8-mounting plate, 9-giving notch, 12-mounting slot, 13-connecting plate, 14-drive roller, 15-support roller, 16-driving pulley, 17-driven pulley, 18-drive belt, 19-first support frame, 20-threaded rod, 21-tensioning wheel, 22-frequency conversion motor, 23-connecting seat, 25-support rod, 26-bearing, 28-first limit block, 35-protective shell, 36-limiting cylinder, 37-limiting cavity, 38-second limit block, 39-fan, 40-treadmill body, 41-handrail, 42-four pressure sensors, 43-push safety lock, 44-LCD touch computer, 45-running belt, 46-first One leg, 47-second leg, 48-mounting tube, 49-threaded extension tube, 50-first threaded column, 51-first base, 52-threaded pin, 53-pin through hole, 54-threaded through hole, 55-handle block, 56-threaded block, 57-pin rod, 58-mounting block, 59-threaded connecting hole, 60-second base, 61-protection box, 62-single chip microcomputer, 63-second threaded column, 64-fixing plate, 70-protection frame, 71-tension sensor type safety lock, 72-base frame, 73-mounting rod, 74-display screen, 75-protection support rod, 76-arc connecting rod, 77-auxiliary support rod, 78-reinforcement rod, 79-horizontal connecting rod, 80-mounting seat, 81-rectangular mounting frame, 82-safety rope, 83-protection belt, 84-wiring ring, 85-anti-slip foot pad. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by runners of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore they cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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; of course, it can also be a mechanical connection or an electrical connection; in addition, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For runners with ordinary skills in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Example 1

[0046] like Figure 1-17 As shown, a cardiopulmonary function test treadmill provided by the present invention includes a treadmill body 40, four pressure sensors 42 arranged at the four corners of the bottom of the treadmill body 40, a protection frame 70 arranged outside the treadmill body 40, a tension sensor type safety lock 71 and a display screen 74 arranged on the protection frame 70, an armrest frame 41 arranged on the treadmill body 40, a push-type safety lock 43 and a liquid crystal touch computer 44 arranged on the armrest frame 41, and a system integrated controller arranged on the armrest frame 41 and connected to the treadmill body 40, the pressure sensor 42, the tension sensor type safety lock 71, the display screen 74, the push-type safety lock 43 and the liquid crystal touch computer 44.

[0047] The present invention has a simple structure, a scientific and reasonable design, and is easy to use. The pressure sensor of the present invention senses the time node of pressure, the sensed pressure value, and the change of the sensed pressure value as running progresses, providing data support for running posture analysis; the slope adjustment mechanism of the present invention composed of double electric push rods can enable the treadmill body to provide positive slope, horizontal slope, and negative slope, thereby realizing the test requirements of uphill running, flat running, and downhill running. At the same time, the double electric push rod structure makes the treadmill body more stable and has small vibration, and provides accurate slope adjustment for the treadmill body, realizing the test requirements of small up and down vibration during running, stable slope, and accurate adjustment; during the running process of a person, when the runner reaches his or her maximum speed and has an abnormal running posture due to fatigue and has a risk of falling, the tension sensor type safety lock arranged on the protective frame outside the treadmill body will be triggered, and the single-chip microcomputer in the system integrated controller will urgently control the running belt to stop moving, thereby ensuring the safety of the cardiopulmonary function test process of the person.

[0048] Example 2

[0049] like Figure 1-17 As shown, a cardiopulmonary function test treadmill provided by the present invention includes a treadmill body 40, four pressure sensors 42 arranged at the four corners of the bottom of the treadmill body 40, a protection frame 70 arranged outside the treadmill body 40, a tension sensor type safety lock 71 and a display screen 74 arranged on the protection frame 70, an armrest frame 41 arranged on the treadmill body 40, a push-type safety lock 43 and a liquid crystal touch computer 44 arranged on the armrest frame 41, and a system integrated controller arranged on the armrest frame 41 and connected to the treadmill body 40, the pressure sensor 42, the tension sensor type safety lock 71, the display screen 74, the push-type safety lock 43 and the liquid crystal touch computer 44.

[0050] The treadmill body 40 includes a mounting frame 1, a transmission mechanism disposed on the mounting frame 1, a running belt 45 sleeved on the transmission mechanism, and a slope adjustment mechanism disposed on one end of the mounting frame 1;

[0051] The slope adjustment mechanism includes a support plate 2 with one end slidingly supported on the ground and the other end rotatably arranged at the bottom of the mounting frame 1, and a driving mechanism arranged on the support plate 2 and connected to the mounting frame 1 to drive one end of the mounting frame 1 to move; the transmission mechanism and the driving mechanism are respectively connected to the system integrated controller.

[0052] In this embodiment 2, the slope adjustment mechanism enables the mounting frame 1 to adjust the slope in the pitch direction. When the mounting frame is parallel to the ground, the slope is horizontal. When the driving mechanism lifts the mounting frame when the mounting frame is parallel to the ground, one end of the mounting frame is lifted upward, and the slope of one end of the mounting frame from the horizontal plane is a positive slope, and the positive slope gradually increases with the lifting of the driving mechanism. When the driving mechanism presses down the mounting frame when the mounting frame is parallel to the ground, one end of the mounting frame is pressed downward, and the slope of one end of the mounting frame from the horizontal plane is a negative slope. In this way, the slope of the mounting frame is changed and adjusted within the range of negative slope to positive slope, which can meet the needs of various test methods during the cardiopulmonary function test.

[0053] Example 3

[0054] like Figure 1-17 As shown, a cardiopulmonary function test treadmill provided by the present invention includes a treadmill body 40, four pressure sensors 42 arranged at the four corners of the bottom of the treadmill body 40, a protection frame 70 arranged outside the treadmill body 40, a tension sensor type safety lock 71 and a display screen 74 arranged on the protection frame 70, an armrest frame 41 arranged on the treadmill body 40, a push-type safety lock 43 and a liquid crystal touch computer 44 arranged on the armrest frame 41, and a system integrated controller arranged on the armrest frame 41 and connected to the treadmill body 40, the pressure sensor 42, the tension sensor type safety lock 71, the display screen 74, the push-type safety lock 43 and the liquid crystal touch computer 44.

[0055] The treadmill body 40 includes a mounting frame 1, a transmission mechanism disposed on the mounting frame 1, a running belt 45 sleeved on the transmission mechanism, and a slope adjustment mechanism disposed on one end of the mounting frame 1;

[0056] The slope adjustment mechanism includes a support plate 2 with one end slidingly supported on the ground and the other end rotatably arranged at the bottom of the mounting frame 1, and a driving mechanism arranged on the support plate 2 and connected to the mounting frame 1 to drive one end of the mounting frame 1 to move; the transmission mechanism and the driving mechanism are respectively connected to the system integrated controller.

[0057] The driving mechanism includes two electric push rods 3 rotatably arranged on the support plate 2 and connected to the mounting frame 1; the transmission mechanism includes a variable frequency motor 22 arranged on one end of the mounting frame 1, a transmission roller 14 rotatably arranged on one end of the mounting frame 1 and connected to the driving shaft of the variable frequency motor 22, and a support roller 15 rotatably arranged on the other end of the mounting frame 1; the treadmill 45 is sleeved between the transmission roller 14 and the support roller 15; the electric push rod 3 and the variable frequency motor 22 are respectively connected to the system integrated controller.

[0058] In this embodiment 3, two parallel mounting plates 8 are provided on the mounting frame 1, a connecting seat 23 is provided between the two mounting plates 8, the electric push rod 3 is obliquely installed between the connecting seat 23 and the support plate 2, and a clearance slot 9 adapted to the electric push rod 3 is provided on the mounting frame 1, and the electric push rod 3 is connected to the connecting seat 23 through the clearance slot 9.

[0059] The support plate 2 is provided with a mounting groove 12 , a connecting plate 13 is provided in the mounting groove 12 , and the electric push rod 3 is rotatably connected to the connecting plate 13 .

[0060] There are four connecting plates 13 in the mounting groove 12, and each electric push rod 3 is connected to two corresponding connecting plates 13. The connecting plates 13 are provided with mounting through holes, and support rods 25 are fixedly connected to the mounting through holes on the corresponding two connecting plates 13. A first limit block 28 is provided on one end of the support rod 25 extending out of the mounting through hole, and the electric push rod 3 is rotatably penetrated through the support rod 25.

[0061] Two rollers 5 are provided on one end of the support plate 2, and a connecting rod 6 is fixedly provided on the other end of the support plate 2. Two bearing seats 7 are provided on the connecting rod 6. Bearings 26 are provided in the bearing seats 7, and the connecting rod 6 is fixedly inserted into the bearings 26; the rollers 5 are slidably supported on the ground, and the bearing seats 7 are fixedly connected to the bottom of the mounting frame 1.

[0062] During the use of the present invention, when the mounting frame needs to be lifted, the electric push rod 3 is started, the telescopic rod of the electric push rod 3 is extended in the direction away from the ground, and the extended telescopic rod pushes the connecting seat 23 to move in the direction away from the ground. The connecting seat 23 drives one end of the mounting frame 1 to move in the direction away from the ground, and one end of the mounting frame 1 is lifted.

[0063] When the mounting frame needs to be lowered, the electric push rod 3 is driven, and the telescopic rod of the electric push rod 3 is shortened toward the ground. The shortened telescopic rod pulls the connecting seat 23 toward the ground, and the connecting seat 23 drives one end of the mounting frame 1 to move toward the ground, so that one end of the mounting frame 1 can be lowered.

[0064] When the mounting frame is parallel to the ground, the mounting frame is lifted, and the slope of the mounting frame after the lifting is a positive slope, and the positive slope of the mounting frame gradually increases as the lifting proceeds. When the mounting frame is parallel to the ground, the mounting frame is pressed down, and the slope of the mounting frame after the pressing down is a negative slope.

[0065] During the process of lifting the mounting frame 1, when one end of the mounting frame 1 moves away from the ground, the connecting rod 6 on the support plate 2 rotates synchronously at the bottom of the mounting frame 1, and the roller 5 on the support plate 2 slides synchronously on the ground toward the other end of the mounting frame 1.

[0066] During the process of lowering the mounting frame 1, when one end of the mounting frame 1 moves toward the ground, the connecting rod 6 on the support plate 2 rotates synchronously at the bottom of the mounting frame 1, and the roller 5 on the support plate 2 slides synchronously on the ground away from the other end of the mounting frame 1.

[0067] The mounting frame 1 adopts a driving structure of double electric push rods 3 to ensure the support stability of the mounting frame 1 and reduce the amplitude of the up and down vibration of the treadmill body.

[0068] When the connecting rod 6 rotates at the bottom of the mounting frame 1 , the bearing 26 rotates in the bearing seat 7 relative to the bearing seat 7 .

[0069] Two rollers 5 are provided on one end of the support plate 2, so that when the mounting frame 1 is lifted or lowered, one end of the support plate 2 can slide more smoothly on the ground, reducing the sliding resistance. The connecting rod 6 is fixedly inserted into the bearing 26, so that when an external force is applied to the connecting rod 6, the bearing 26 can rotate relative to the bearing seat 7 in the bearing seat 7, thereby causing the connecting rod 6 to rotate.

[0070] In this embodiment 3, a driving pulley 16 is connected to the driving shaft of the variable frequency motor 22, a driven pulley 17 is provided on one end of the transmission drum 14, a transmission belt 18 is sleeved between the driving pulley 16 and the driven pulley 17, and a tensioning mechanism for tensioning the transmission belt 18 is provided on the mounting frame 1.

[0071] The reciprocating motion of the treadmill belt is driven by the variable frequency motor 22. The principle is as follows: the variable frequency motor 22 is started, the drive shaft of the variable frequency motor 22 transmits the motion to the transmission roller 14, the transmission roller 14 rotates, the transmission roller 14 drives the treadmill belt 45 to move, the treadmill belt drives the support roller 15 to rotate, and the treadmill belt reciprocates between the transmission roller 14 and the support roller 15. Among them, the support roller 15 is used to support and tension the treadmill belt, so that the reciprocating motion of the treadmill belt between the transmission roller 14 and the support roller 15 can be realized.

[0072] The frequency conversion motor 22 and the transmission drum 14 transmit motion by means of the cooperation of the driving pulley 16, the driven pulley 17 and the transmission belt 18. The principle is as follows: the frequency conversion motor 22 is started, the driving shaft of the frequency conversion motor 22 drives the driving pulley 16 to rotate, the driving pulley 16 drives the transmission belt 18 to move, the transmission belt 18 drives the driven pulley 17 to rotate, and the transmission belt 18 moves back and forth between the driving pulley 16 and the driven pulley 17. Among them, the driven pulley 17 is used to support the transmission belt 18, so as to facilitate the motion transmission between the driving pulley 16 and the transmission belt 18. The tensioning mechanism is used to tension the transmission belt 18, which is conducive to the reciprocating movement of the transmission belt 18 between the driving pulley 16 and the driven pulley 17.

[0073] The tensioning mechanism includes a first support frame 19 arranged on the mounting frame 1, a threaded rod 20 threadedly connected to the first support frame 19, a second support frame 4 fixedly arranged at the bottom of the threaded rod 20 and located in the first support frame 19, and a tensioning wheel 21 rotatably arranged on the second support frame 4 and adapted to the transmission belt 18.

[0074] The transmission belt 18 is attached to the bottom of the tension wheel 21. By twisting the threaded rod 20, the threaded rod 20 is extended downward. During the extension of the threaded rod 20, the second support frame 4 is driven to move downward. The second support frame 4 drives the tension wheel 21 to move synchronously. The tension wheel 21 moving downward gradually tensions the transmission belt 18, making the transmission belt 18 tight. In this way, the transmission belt 18 is conducive to the reciprocating movement between the driving pulley 16 and the driven pulley 17.

[0075] The second support frame 4 is provided with a limiting cylinder 36, the threaded rod 20 is movably arranged in the limiting cylinder 36, a limiting cavity 37 is arranged in the limiting cylinder 36, and a second limiting block 38 adapted to the limiting cavity 37 is provided on the threaded rod 20, and the second limiting block 38 is limited in the limiting cavity 37. The threaded rod 20 is loosely matched with the limiting cylinder 36. The second limiting block 38 is loosely matched with the limiting cavity 37. The second limiting block 38 can rotate in the limiting cavity 37.

[0076] During the process of twisting the threaded rod 20 , the limiting cylinder 36 ensures that the threaded rod 20 transmits the movement to the second supporting frame 4 without affecting the downward extension of the threaded rod 20 .

[0077] The mounting frame 1 of the present invention is provided with a protective housing 35 to prevent the frequency conversion motor 22 and other components mounted on the mounting frame 1 from injuring people during operation when the mounting frame 1 is put into use.

[0078] Example 4

[0079] like Figure 1-17 As shown, a cardiopulmonary function test treadmill provided by the present invention includes a treadmill body 40, four pressure sensors 42 arranged at the four corners of the bottom of the treadmill body 40, a protection frame 70 arranged outside the treadmill body 40, a tension sensor type safety lock 71 and a display screen 74 arranged on the protection frame 70, an armrest frame 41 arranged on the treadmill body 40, a push-type safety lock 43 and a liquid crystal touch computer 44 arranged on the armrest frame 41, and a system integrated controller arranged on the armrest frame 41 and connected to the treadmill body 40, the pressure sensor 42, the tension sensor type safety lock 71, the display screen 74, the push-type safety lock 43 and the liquid crystal touch computer 44.

[0080] The protection frame 70 includes a base frame 72 arranged at the bottom of the treadmill body 40, two protection support rods 75 respectively arranged on both sides of the base frame 72, an arc-shaped connecting rod 76 arranged between the two protection support rods 75, a mounting seat 80 arranged on the arc-shaped connecting rod 76 for mounting a tension sensor type safety lock 71, a mounting rod 73 arranged between the two protection support rods 75, a rectangular mounting frame 81 arranged on the mounting rod 73 for mounting a display screen 74, an auxiliary support rod 77 arranged on the base frame 72 and connected to the protection support rod 75, a reinforcing rod 78 arranged between the protection support rod 75 and the auxiliary support rod 77, and a horizontal connecting rod 79 arranged between the two reinforcing rods 78.

[0081] In this embodiment 4, two protective support rods 75 are respectively arranged on both sides of the base frame 72, and an arc-shaped connecting rod 76 for installing a tension sensor type safety lock 71 is provided between the two protective support rods 75. The tension sensor type safety lock 71 is installed on the arc-shaped connecting rod 76. In this way, it is convenient to protect the runner. Two auxiliary support rods 77 are respectively installed on both sides of the base frame 72, and the tops of the two auxiliary support rods 77 are respectively connected to the two protective support rods 75. The auxiliary support rod 77 can increase the strength of the protective support rod 75, thereby avoiding deformation of the protective support rod 75 during use. The reinforcing rod 78 is installed between the protective support rod 75 and the auxiliary support rod 77. The reinforcing rod 78 can further strengthen the supporting strength of the protective support rod 75 and the auxiliary support rod 77, so that the runner will not bend the protective support rod 75 and the auxiliary support rod 77 when falling.

[0082] Several wiring rings 84 for tidying up the lines are evenly distributed on the arc-shaped connecting rod 76. The lines connected to the display screen and the tension sensor-type safety lock on the protection frame can be bundled in the wiring rings 84, thus avoiding the lines from being messy on the protection frame.

[0083] The bottom of the base frame 72 is provided with anti-skid feet 85 .

[0084] Example 5

[0085] like Figure 1-17 As shown, a cardiopulmonary function test treadmill provided by the present invention includes a treadmill body 40, four pressure sensors 42 arranged at the four corners of the bottom of the treadmill body 40, a protection frame 70 arranged outside the treadmill body 40, a tension sensor type safety lock 71 and a display screen 74 arranged on the protection frame 70, an armrest frame 41 arranged on the treadmill body 40, a push-type safety lock 43 and a liquid crystal touch computer 44 arranged on the armrest frame 41, and a system integrated controller arranged on the armrest frame 41 and connected to the treadmill body 40, the pressure sensor 42, the tension sensor type safety lock 71, the display screen 74, the push-type safety lock 43 and the liquid crystal touch computer 44.

[0086] The protection frame 70 includes a base frame 72 arranged at the bottom of the treadmill body 40, two protection support rods 75 respectively arranged on both sides of the base frame 72, an arc-shaped connecting rod 76 arranged between the two protection support rods 75, a mounting seat 80 arranged on the arc-shaped connecting rod 76 for mounting a tension sensor type safety lock 71, a mounting rod 73 arranged between the two protection support rods 75, a rectangular mounting frame 81 arranged on the mounting rod 73 for mounting a display screen 74, an auxiliary support rod 77 arranged on the base frame 72 and connected to the protection support rod 75, a reinforcing rod 78 arranged between the protection support rod 75 and the auxiliary support rod 77, and a horizontal connecting rod 79 arranged between the two reinforcing rods 78.

[0087] A safety rope 82 for applying tension to the tension sensor type safety lock 71 is connected to the tension sensor type safety lock 71 , and a protective belt 83 for fixing the safety rope 82 on the runner is provided.

[0088] In this embodiment 5, the runner performs a cardiopulmonary test on the treadmill. When the runner loses balance due to fatigue, the safety rope 82 on the protection frame can drag the runner. At the same time, the safety rope 82 pulls the tension sensor type safety lock. The tension sensor type safety lock is subjected to tension and transmits the tension information to the single-chip microcomputer. The single-chip microcomputer stops the running belt from moving, ensuring the safety of the runner. When the runner is running, the display screen 74 can display the runner's motion data, making it easy to view the runner's various motion data.

[0089] Example 6

[0090] like Figure 1-17 As shown, a cardiopulmonary function test treadmill provided by the present invention includes a treadmill body 40, four pressure sensors 42 arranged at the four corners of the bottom of the treadmill body 40, a protection frame 70 arranged outside the treadmill body 40, a tension sensor type safety lock 71 and a display screen 74 arranged on the protection frame 70, an armrest frame 41 arranged on the treadmill body 40, a push-type safety lock 43 and a liquid crystal touch computer 44 arranged on the armrest frame 41, and a system integrated controller arranged on the armrest frame 41 and connected to the treadmill body 40, the pressure sensor 42, the tension sensor type safety lock 71, the display screen 74, the push-type safety lock 43 and the liquid crystal touch computer 44.

[0091] Two first legs 46 and two second legs 47 are provided at the four corners of the treadmill body 40. The two first legs 46 are located at one end of the treadmill body 40, and the two second legs 47 are located at the other end of the treadmill body 40. The four pressure sensors 42 are respectively installed at the bottom of the two first legs 46 and the two second legs 47.

[0092] In this embodiment 6, four pressure sensors 42 are distributed at the four corners of the bottom of the mounting frame 1. In this way, a pressure sensing area bounded by the four pressure sensors 42 can be formed on the mounting frame 1, which is convenient for sensing the pressure applied to the treadmill when a person is running.

[0093] Example 7

[0094] like Figure 1-17 As shown, a cardiopulmonary function test treadmill provided by the present invention includes a treadmill body 40, four pressure sensors 42 arranged at the four corners of the bottom of the treadmill body 40, a protection frame 70 arranged outside the treadmill body 40, a tension sensor type safety lock 71 and a display screen 74 arranged on the protection frame 70, an armrest frame 41 arranged on the treadmill body 40, a push-type safety lock 43 and a liquid crystal touch computer 44 arranged on the armrest frame 41, and a system integrated controller arranged on the armrest frame 41 and connected to the treadmill body 40, the pressure sensor 42, the tension sensor type safety lock 71, the display screen 74, the push-type safety lock 43 and the liquid crystal touch computer 44.

[0095] Two first legs 46 and two second legs 47 are provided at the four corners of the treadmill body 40. The two first legs 46 are located at one end of the treadmill body 40, and the two second legs 47 are located at the other end of the treadmill body 40. The four pressure sensors 42 are respectively installed at the bottom of the two first legs 46 and the two second legs 47.

[0096] The first leg 46 includes a mounting tube 48 disposed on the treadmill body 40, a threaded extension tube 49 inserted into the mounting tube 48, a first threaded column 50 threadedly connected to the threaded extension tube 49, a first base 51 disposed at the bottom of the first threaded column 50 and located outside the mounting tube 48, and a threaded pin 52 threadedly connected to the mounting tube 48 and inserted into the threaded extension tube 49; the corresponding pressure sensor 42 is installed at the bottom of the first base 51;

[0097] A plurality of latch holes 53 connected to the inner cavity of the threaded extension tube 49 are provided in the length direction thereof, and a threaded through hole 54 matched with the threaded pin 52 is provided on the mounting tube 48. The threaded pin 52 includes a handle block 55, a threaded block 56 provided on the handle block 55 and matched with the threaded through hole 54, and a pin rod 57 provided on the threaded block 56 and matched with the latch through hole 53. The threaded block 56 is threadedly connected in the threaded through hole 54, and the pin rod 57 is inserted in the latch through hole 53.

[0098] In this embodiment 7, the second leg 47 and the roller 5 are always on the same horizontal plane, thus ensuring the overall stability of the treadmill. The distance from the ground of the first leg 46 is adjustable. During the use of the present invention, the slope adjustment mechanism adopts a support structure of a double electric push rod, which greatly increases the stability of the treadmill body when one end is raised or lowered. When the slope of the mounting frame 1 needs to be adjusted, the distance from the ground of the first leg 46 can be increased to avoid the first leg 46 from hindering the slope adjustment process of the mounting frame 1. Before the person runs, the distance from the ground of the first leg 46 is shortened until the first base 51 touches the ground. In this way, the overall stability of the treadmill is enhanced, and when the person runs, the corresponding pressure sensor 42 installed on the first base 51 and the corresponding pressure sensor 42 installed on the second leg 47 can be used to sense the pressure applied by the person to the running belt.

[0099] When increasing the distance of the first leg 46 from the ground, the handle block 55 is manually screwed so that the handle block 55 drives the threaded block 56 to move until the threaded block 56 is screwed out of the threaded through hole 54, and then the handle block 55 is pulled outward so that the handle block 55 drives the threaded block 56 and the pin 57 to move outward synchronously until the pin 57 is pulled out of the threaded extension tube 49 and the mounting tube 48. After that, the threaded extension tube 49 is pulled upward in the mounting tube 48, and the threaded extension tube 49 drives the first base 51 to move synchronously, and the first base 51 gradually moves away from the ground. After the first base 51 is at an appropriate distance from the ground, the handle block 55 is manually screwed so that the handle block 55 drives the threaded block 56 to move until the threaded block 56 is screwed into the threaded through hole 54. During the process of the threaded block 56 being screwed into the threaded through hole 54, the pin 57 is synchronously inserted into the pin through hole 53, so that the threaded extension tube 49 can be fixed in the mounting tube 48.

[0100] When shortening the distance between the first leg 46 and the ground, the handle block 55 is manually screwed to make the handle block 55 drive the threaded block 56 to move until the threaded block 56 is screwed out of the threaded through hole 54, and then the handle block 55 is pulled outward to make the handle block 55 drive the threaded block 56 and the pin 57 to move outward synchronously until the pin 57 is pulled out of the threaded extension tube 49 and the installation tube 48. After that, the threaded extension tube 49 is pressed downward in the installation tube 48, and the threaded extension tube 49 drives the first base 51 to move synchronously, and the first base 51 gradually approaches the ground. After the first base 51 is at an appropriate distance from the ground, the handle block 55 is manually screwed to make the handle block 55 drive the threaded block 56 to move until the threaded block 56 is screwed into the threaded through hole 54. During the process of screwing the threaded block 56 into the threaded through hole 54, the pin 57 is synchronously inserted into the pin through hole 53, so that the threaded extension tube 49 can be fixed in the installation tube 48.

[0101] Example 8

[0102] like Figure 1-17As shown, a cardiopulmonary function test treadmill provided by the present invention includes a treadmill body 40, four pressure sensors 42 arranged at the four corners of the bottom of the treadmill body 40, a protection frame 70 arranged outside the treadmill body 40, a tension sensor type safety lock 71 and a display screen 74 arranged on the protection frame 70, an armrest frame 41 arranged on the treadmill body 40, a push-type safety lock 43 and a liquid crystal touch computer 44 arranged on the armrest frame 41, and a system integrated controller arranged on the armrest frame 41 and connected to the treadmill body 40, the pressure sensor 42, the tension sensor type safety lock 71, the display screen 74, the push-type safety lock 43 and the liquid crystal touch computer 44.

[0103] Two first legs 46 and two second legs 47 are provided at the four corners of the treadmill body 40. The two first legs 46 are located at one end of the treadmill body 40, and the two second legs 47 are located at the other end of the treadmill body 40. The four pressure sensors 42 are respectively installed at the bottom of the two first legs 46 and the two second legs 47.

[0104] The second leg 47 includes a mounting block 58 disposed on the treadmill body 40, a threaded connection hole 59 provided in the mounting block 58, a second threaded column 63 threadedly connected to the threaded connection hole 59, and a second base 60 disposed at the bottom of the second threaded column 63; the corresponding pressure sensor 42 is installed at the bottom of the second base 60.

[0105] In this embodiment 8, a fixing plate 64 is provided on the mounting block 58 , and the fixing plate 64 is connected to the treadmill body 40 via bolts, and the mounting block 58 is connected to the treadmill body 40 via the fixing plate 64 .

[0106] Example 9

[0107] like Figure 1-17 As shown, a cardiopulmonary function test treadmill provided by the present invention includes a treadmill body 40, four pressure sensors 42 arranged at the four corners of the bottom of the treadmill body 40, a protection frame 70 arranged outside the treadmill body 40, a tension sensor type safety lock 71 and a display screen 74 arranged on the protection frame 70, an armrest frame 41 arranged on the treadmill body 40, a push-type safety lock 43 and a liquid crystal touch computer 44 arranged on the armrest frame 41, and a system integrated controller arranged on the armrest frame 41 and connected to the treadmill body 40, the pressure sensor 42, the tension sensor type safety lock 71, the display screen 74, the push-type safety lock 43 and the liquid crystal touch computer 44.

[0108] The system integrated controller includes a protective box 61 arranged on the handrail frame 41, and a single-chip microcomputer 62 arranged in the protective box 61. The treadmill body 40, the pressure sensor 42, the tension sensor type safety lock 71, the display screen 74, the push-type safety lock 43 and the LCD touch computer 44 are respectively connected to the single-chip microcomputer 62.

[0109] In this embodiment 9, the pressure sensor 42, the tension sensor type safety lock 71, the display screen 74, the push-type safety lock 43 and the LCD touch computer 44, as well as the variable frequency motor and the electric push rod on the treadmill body 40 are respectively connected to the single chip computer 62. When the present invention is used, the personnel sends a power-on command to the single chip computer 62 through the LCD touch computer 44, and the single chip computer 62 starts the variable frequency motor according to the power-on command, and the variable frequency motor runs and transmits the motion to the treadmill belt, so that the treadmill belt on the treadmill body 40 moves back and forth. According to needs, the personnel can adjust the frequency of the variable frequency motor through the LCD touch computer 44 to control the speed of the reciprocating motion of the treadmill belt. The single chip computer 62 receives the speed command input by the personnel on the LCD touch computer 44, thereby adjusting the speed of the variable frequency motor according to the corresponding command, and then adjusting the reciprocating motion speed of the treadmill belt, and the single chip computer synchronously records the motion speed of the treadmill belt. When a person is running, the pressure sensor 42 senses the pressure applied by the person to the treadmill, and transmits the sensing information to the single-chip microcomputer 62 in real time. The single-chip microcomputer stores the received pressure information. At the same time, the single-chip microcomputer records the time node when the pressure sensor 42 transmits the pressure to the single-chip microcomputer, and synchronously transmits the received pressure information and the recorded time node to the display screen for display. When a person needs to stop running, he presses the push-type safety lock 43. The single-chip microcomputer 62 receives the information transmitted by the push-type safety lock 43, and then controls the variable frequency motor to stop running according to the received information, thereby stopping the running belt. The single-chip microcomputer synchronously records the exercise time of the person from the beginning to the end of the running, and transmits the final exercise time to the display screen for display.

[0110] When doing the cardiopulmonary function test, one end of the safety rope installed on the external protection frame of the treadmill is tied around the runner's waist, and the other end is connected to the tension sensor type safety lock. When there is a tendency to fall during running, the tension sensor type safety lock will be triggered. The tension sensor type safety lock will transmit the trigger information to the system integrated controller, and the system integrated controller will stop the frequency conversion motor from running, and then stop the treadmill belt from moving.

[0111] Before running, the personnel can adjust the slope of the treadmill through the LCD touch screen computer 44 according to actual needs. The single chip computer 62 receives the slope command input by the personnel on the LCD touch screen 44, thereby controlling the operation of the dual electric push rods according to the corresponding command, and adjusting the extension of the telescopic rod of the dual electric push rods, so that the telescopic rod of the dual electric push rods drives one end of the treadmill to move, until the slope of the treadmill is suitable, and the single chip computer 62 controls the dual electric push rods to stop running. The slope adjustment mechanism composed of the dual electric push rods can enable the treadmill body to provide positive slope, horizontal slope, and negative slope, thereby realizing the test requirements of uphill running, flat running, and downhill running. At the same time, the dual electric push rod structure makes the treadmill body more stable and has less vibration, providing accurate slope adjustment for the treadmill body, realizing the test requirements of small up and down vibration during running, stable slope, and accurate adjustment.

[0112] The handrail 41 of the present invention is also provided with a fan 39, which is connected to the single-chip microcomputer 62 and is used to provide cool air when needed. A person inputs a command to turn on or off the fan on the LCD touch screen 44, and the single-chip microcomputer controls the fan 39 to turn on or off after receiving the corresponding command.

[0113] A method for providing running posture analysis data on a treadmill for cardiopulmonary function testing: based on four pressure sensors distributed at the four corners of a treadmill body, a pressure sensing area bounded by the four pressure sensors is formed on the treadmill body, a runner applies pressure to the pressure sensing area during running on a treadmill belt, the pressure application point where the runner applies pressure to the pressure sensing area changes dynamically with the running, the distances between the four pressure sensors and the pressure application point are different, the closer the distance between the pressure sensor and the pressure application point is, the greater the pressure sensed by the pressure sensor is, during the runner's running, the four pressure sensors sense the pressure applied to the pressure sensing area by the runner in real time, and simultaneously transmit the sensed information to a single-chip microcomputer in real time, the single-chip microcomputer stores the pressure values ​​sensed by the four pressure sensors at the same time, and transmits the pressure values ​​to a display screen for display;

[0114] The position change of the pressure application point where the runner applies pressure to the pressure sensing area reflects the change of the center of gravity projection of the runner in the pressure sensing area. During the runner's running, the center of gravity projection on the pressure sensing area changes continuously. The pressure values ​​sensed by the four pressure sensors change with the change of the center of gravity projection. The change of the center of gravity projection of the runner during the running process can be reversely judged according to the change of the pressure values ​​sensed by the four pressure sensors. The change of the pressure values ​​sensed by the four pressure sensors provides data support for judging the change of the center of gravity projection of the runner during the running process.

[0115] The single chip simultaneously receives and stores the pressure values ​​sensed by the four pressure sensors, and records the time nodes when the pressure sensors transmit pressure twice in a row. The time node reflects the time interval between the runner's two consecutive pressure applications to the running belt. The runner's step frequency can be determined based on the change in the time interval. At the same time, the runner's air time can be calculated based on the pressure change during the running process, and then the runner's air height can be calculated. The regularity, repeatability and stability of the person's steps can be determined based on the time interval between the runner's two consecutive pressure applications to the running belt, the runner's step frequency, the runner's air time, the runner's air height and the change in the runner's center of gravity projection. Therefore, the time node when the pressure sensor senses the pressure, the sensed pressure value, and the change in the sensed pressure value as the running progresses provide data support for the analysis of the running posture.

[0116] Every time a runner runs, he or she adjusts the speed of the running belt on the treadmill body through the LCD touch computer, and the single-chip computer records the movement data of the person during the running process. The movement data includes the exercise time from the start to the end of the running, the movement speed of the running belt, the slope of the treadmill, the time point when the pressure sensor senses the pressure, and the pressure values ​​transmitted by the four pressure sensors. The recorded movement data is transmitted to the display screen for display, and the data displayed on the display screen can provide data support for running posture analysis;

[0117] During the runner's cardiopulmonary function test, the safety rope of the tension sensor type safety lock located on the treadmill safety protection frame is tied around the runner's waist. If the runner has an abnormal running posture or the body tilts and tends to fall during running, the tension sensor type safety lock is subjected to tension and transmits the tension to the microcontroller. The microcontroller stops the treadmill belt based on the information transmitted by the tension sensor type safety lock, ensuring the safety of the personnel during the testing process.

[0118] The model of the single chip microcomputer 62 used in the present invention is STM32F103VET6.

[0119] The pressure sensor 42, tension sensor type safety lock 71, display screen 74, fan 39, push-type safety lock 43, LCD touch computer 44, frequency conversion motor 22, electric push rod 3 and single-chip computer 62 used in the present invention are all existing known electrical equipment and can be directly purchased and used on the market. The structures, circuits, and control principles of the pressure sensor 42, tension sensor type safety lock 71, display screen 74, fan 39, push-type safety lock 43, LCD touch computer 44, frequency conversion motor 22, electric push rod 3 and single-chip computer 62 are all existing known technologies. Therefore, the structures, circuits, and control principles of the pressure sensor 42, tension sensor type safety lock 71, display screen 74, fan 39, push-type safety lock 43, LCD touch computer 44, frequency conversion motor 22, electric push rod 3 and single-chip computer 62 will not be repeated here.

[0120] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, rather than limiting them, and certainly not limiting the patent scope of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, ordinary technical runners in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention; that is to say, any changes or embellishments made to the main design concept and spirit of the present invention that have no substantive significance, and the technical problems they solve are still consistent with the present invention, should be included in the protection scope of the present invention; in addition, the direct or indirect application of the technical solution of the present invention in other related technical fields is also included in the patent protection scope of the present invention.

Claims

1. A treadmill for testing cardiopulmonary function, characterized in that: The invention comprises a treadmill body (40), four pressure sensors (42) respectively arranged at the four corners of the bottom of the treadmill body (40), a protection frame (70) arranged outside the treadmill body (40), a tension sensor type safety lock (71) and a display screen (74) arranged on the protection frame (70), an armrest frame (41) arranged on the treadmill body (40), a push-type safety lock (43) and a liquid crystal touch computer (44) arranged on the armrest frame (41), and a system integrated controller arranged on the armrest frame (41) and connected to the treadmill body (40), the pressure sensor (42), the tension sensor type safety lock (71), the display screen (74), the push-type safety lock (43) and the liquid crystal touch computer (44).

2. A cardiopulmonary function test treadmill according to claim 1, characterized in that: The treadmill body (40) comprises a mounting frame (1), a transmission mechanism arranged on the mounting frame (1), a running belt (45) sleeved on the transmission mechanism, and a slope adjustment mechanism arranged on one end of the mounting frame (1); The slope adjustment mechanism comprises a support plate (2) with one end slidably supported on the ground and the other end rotatably arranged at the bottom of the mounting frame (1), and a driving mechanism arranged on the support plate (2) and connected to the mounting frame (1) to drive one end of the mounting frame (1) to move; the transmission mechanism and the driving mechanism are respectively connected to the system integrated controller.

3. A cardiopulmonary function test treadmill according to claim 2, characterized in that: The driving mechanism comprises two electric push rods (3) rotatably arranged on a support plate (2) and connected to a mounting frame (1); the transmission mechanism comprises a variable frequency motor (22) arranged on one end of the mounting frame (1), a transmission roller (14) rotatably arranged on one end of the mounting frame (1) and connected to a drive shaft of the variable frequency motor (22), and a support roller (15) rotatably arranged on the other end of the mounting frame (1); a treadmill (45) is sleeved between the transmission roller (14) and the support roller (15); the electric push rod (3) and the variable frequency motor (22) are respectively connected to a system integrated controller.

4. A cardiopulmonary function test treadmill according to claim 1, characterized in that: The protection frame (70) comprises a base frame (72) arranged at the bottom of the treadmill body (40), two protection support rods (75) respectively arranged on both sides of the base frame (72), an arc-shaped connecting rod (76) arranged between the two protection support rods (75), a mounting seat (80) arranged on the arc-shaped connecting rod (76) for mounting a tension sensor type safety lock (71), a mounting rod (73) arranged between the two protection support rods (75), a rectangular mounting frame (81) arranged on the mounting rod (73) for mounting a display screen (74), an auxiliary support rod (77) arranged on the base frame (72) and connected to the protection support rod (75), a reinforcing rod (78) arranged between the protection support rod (75) and the auxiliary support rod (77), and a horizontal connecting rod (79) arranged between the two reinforcing rods (78).

5. A cardiopulmonary function test treadmill according to claim 4, characterized in that: A safety rope (82) for applying tension to the tension sensor type safety lock (71) is connected to the tension sensor type safety lock (71), and a protective belt (83) for fixing on the runner is provided on the safety rope (82).

6. A cardiopulmonary function test treadmill according to claim 1, characterized in that: Two first legs (46) and two second legs (47) are respectively arranged at the four corners of the treadmill body (40); the two first legs (46) are located at one end of the treadmill body (40); the two second legs (47) are located at the other end of the treadmill body (40); and four pressure sensors (42) are respectively installed at the bottom of the two first legs (46) and the two second legs (47) in a one-to-one correspondence.

7. A cardiopulmonary function test treadmill according to claim 6, characterized in that: The first leg (46) comprises a mounting tube (48) arranged on the treadmill body (40), a threaded extension tube (49) inserted into the mounting tube (48), a first threaded column (50) threadedly connected to the threaded extension tube (49), a first base (51) arranged at the bottom of the first threaded column (50) and located outside the mounting tube (48), and a threaded pin (52) threadedly connected to the mounting tube (48) and inserted into the threaded extension tube (49); the corresponding pressure sensor (42) is installed at the bottom of the first base (51); A plurality of latch holes (53) communicating with the inner cavity of the threaded extension tube (49) are provided in the length direction of the threaded extension tube (49); a threaded hole (54) matching with the threaded pin (52) is provided on the mounting tube (48); the threaded pin (52) comprises a handle block (55), a threaded block (56) provided on the handle block (55) and matching with the threaded hole (54); and a pin rod (57) provided on the threaded block (56) and matching with the latch hole (53); the threaded block (56) is threadedly connected in the threaded hole (54), and the pin rod (57) is plugged in the latch hole (53).

8. A cardiopulmonary function test treadmill according to claim 6, characterized in that: The second leg (47) includes a mounting block (58) disposed on the treadmill body (40), a threaded connection hole (59) provided in the mounting block (58), a second threaded column (63) threadedly connected to the threaded connection hole (59), and a second base (60) disposed at the bottom of the second threaded column (63); the corresponding pressure sensor (42) is installed at the bottom of the second base (60).

9. A cardiopulmonary function test treadmill according to claim 1, characterized in that: The system integrated controller comprises a protection box (61) arranged on the handrail frame (41), and a single chip computer (62) arranged in the protection box (61); a treadmill body (40), a pressure sensor (42), a tension sensor type safety lock (71), a display screen (74), a push-type safety lock (43) and a liquid crystal touch computer (44) are respectively connected to the single chip computer (62).

10. The method for providing running posture analysis data using a treadmill for cardiopulmonary function testing according to any one of claims 1 to 9, characterized in that: Based on the four pressure sensors distributed at the four corners of the treadmill body, a pressure sensing area bounded by the four pressure sensors is formed on the treadmill body. When the runner is running on the treadmill belt, the runner applies pressure to the pressure sensing area. The pressure application point where the runner applies pressure to the pressure sensing area changes dynamically with the running. The distances between the four pressure sensors and the pressure application point are different. The closer the distance between the pressure sensor and the pressure application point is, the greater the pressure sensed by the pressure sensor is. When the runner is running, the four pressure sensors sense the pressure applied to the pressure sensing area by the runner in real time, and transmit the sensing information to the single-chip microcomputer in real time. The single-chip microcomputer stores the pressure values ​​sensed by the four pressure sensors at the same time, and transmits the pressure values ​​to the display screen for display. The position change of the pressure application point where the runner applies pressure to the pressure sensing area reflects the change of the center of gravity projection of the runner in the pressure sensing area. During the runner's running, the center of gravity projection on the pressure sensing area changes continuously. The pressure values ​​sensed by the four pressure sensors change with the change of the center of gravity projection. The change of the center of gravity projection of the runner during the running process can be reversely judged according to the change of the pressure values ​​sensed by the four pressure sensors. The change of the pressure values ​​sensed by the four pressure sensors provides data support for judging the change of the center of gravity projection of the runner during the running process. The single chip simultaneously receives and stores the pressure values ​​sensed by the four pressure sensors, and records the time nodes when the pressure sensors transmit pressure twice in a row. The time node reflects the time interval between the runner's two consecutive pressure applications to the running belt. The runner's step frequency can be determined based on the change in the time interval. At the same time, the runner's air time can be calculated based on the pressure change during the running process, and then the runner's air height can be calculated. The regularity, repeatability and stability of the person's steps can be determined based on the time interval between the runner's two consecutive pressure applications to the running belt, the runner's step frequency, the runner's air time, the runner's air height and the change in the runner's center of gravity projection. Therefore, the time node when the pressure sensor senses the pressure, the sensed pressure value, and the change in the sensed pressure value as the running progresses provide data support for the analysis of the running posture. Every time a runner runs, he or she adjusts the speed of the running belt on the treadmill body through the LCD touch computer, and the single-chip computer records the movement data of the person during the running process. The movement data includes the exercise time from the start to the end of the running, the movement speed of the running belt, the slope of the treadmill, the time point when the pressure sensor senses the pressure, and the pressure values ​​transmitted by the four pressure sensors. The recorded movement data is transmitted to the display screen for display, and the data displayed on the display screen can provide data support for running posture analysis; During the runner's cardiopulmonary function test, the safety rope of the tension sensor type safety lock located on the treadmill safety protection frame is tied around the runner's waist. If the runner has an abnormal running posture or the body tilts and tends to fall during running, the tension sensor type safety lock is subjected to tension and transmits the tension to the microcontroller. The microcontroller stops the treadmill belt based on the information transmitted by the tension sensor type safety lock, ensuring the safety of the personnel during the testing process.

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