A kind of anti-fall monitoring alarm device and alarm method thereof

Abstract

The invention relates to the field of alarms for ensuring personal safety, and discloses an anti-fall monitoring alarm device and an alarm method thereof, wherein the anti-fall monitoring alarm device comprises an open-and-closed ring body, a spliced ​​middle ring body, a spliced ​​annular capsule, an air filling and deflation mechanism, a spliced ​​annular frame, a circumferential movement mechanism, an ultrasonic distance measurement sensor, a spliced ​​power supply mechanism and a control assembly; the control assembly comprises a power supply, an integrated control terminal, a motion information sensor, a buzzer and a micro vibration motor; when the motion information sensor detects that the acceleration of the user's foot in the vertical direction exceeds a threshold value, the ultrasonic distance measurement sensor is driven to rotate multiple times within a set time period through the circumferential movement mechanism, and the range of the flat area around the user's foot landing point is collected; when the area of ​​the flat area around the foot landing point is less than the set threshold value, the integrated control terminal sends an electrical signal to the buzzer and the micro vibration motor, and an early warning can be given to the user.

Description

Technical Field

[0001] The present invention relates to the field of alarms for ensuring personal safety, and more specifically, to an anti-fall monitoring alarm device and an alarm method thereof. Background Art

[0002] In recent years, the aging of my country's population has become increasingly serious, and the situation of accidental injuries to the elderly due to falls has received more and more attention. Among them, the accidental injuries caused by falls of the elderly in the stair area are the most serious, and the mortality rate is also the highest among all fall scenarios.

[0003] At present, there are many anti-fall alarm devices for the protection of the elderly. For example, there are devices that automatically alarm and request rescue after the elderly fall, and there are also wearable items such as airbags, inflatable clothes, and inflatable hats that can reduce the impact after the elderly fall and protect the head and bones. From this, it can be seen that wearable devices to protect the elderly from falling seem to have become a consensus, but the effects of these devices are all produced after the elderly fall, and they cannot prevent the elderly from falling or warn the elderly before they are likely to fall, and cannot achieve the effect of real anti-fall alarm. Summary of the invention

[0004] The purpose of the present invention is to provide an anti-fall monitoring alarm device and an alarm method thereof in order to solve the above-mentioned problem.

[0005] The present invention provides an anti-fall monitoring alarm device, comprising an open-and-closed ring body, a spliced ​​middle ring body connected to the inner circular surface of the open-and-closed ring body, a spliced ​​annular capsule connected to the inner circular surface of the spliced ​​middle ring body, two symmetrically arranged inflation and deflation mechanisms on the open-and-closed ring body, a spliced ​​annular frame connected to the lower end of the spliced ​​middle ring body, a circumferential movement mechanism arranged in the spliced ​​annular frame, an ultrasonic distance measuring sensor connected to the circumferential movement mechanism, a spliced ​​power supply mechanism and a control assembly arranged in the spliced ​​annular frame, the two inflation and deflation mechanisms are used to adjust the amount of gas in the spliced ​​annular capsule, the open-and-closed ring body, the spliced ​​middle ring body, the spliced ​​annular capsule, and the spliced ​​annular frame are all coaxially arranged, the circumferential movement mechanism is used to drive the ultrasonic distance measuring sensor to rotate a set angle around the central axis of the spliced ​​annular frame, and the ultrasonic distance measuring sensor is used to obtain terrain data in a set area around the spliced ​​annular frame;

[0006] The control assembly includes a power supply, an integrated control terminal, a motion information sensor, a buzzer and a micro vibration motor. The integrated control terminal, the motion information sensor and the spliced ​​power supply mechanism are all electrically connected to the power supply, and the circular movement mechanism is electrically connected to the spliced ​​power supply mechanism.

[0007] As a further optimization scheme of the present invention, the open and close ring body includes a first half ring body and a second half ring body, one end of the first half ring body and one end of the second half ring body are hinged, and the other end of the first half ring body and the other end of the second half ring body are detachably connected through a limit switch.

[0008] As a further optimization scheme of the present invention, the limit switch includes a circular hole provided on the second semi-ring body, a first circular plate fixedly connected to the opening at the upper end of the circular hole, a first adjusting rod slidably connected to the middle part of the first circular plate, a second circular plate fixedly connected to the first adjusting rod, an insert block connected to one end of the first adjusting rod, a first spring connected between the first circular plate and the second circular plate, and a first circular groove provided on the first semi-ring body, and the first circular groove is matched with the insert block.

[0009] As a further optimization scheme of the present invention, the spliced ​​central ring body includes two symmetrically arranged central half ring bodies, the two central half ring bodies are respectively connected to the inner circular surface of the first half ring body and the inner circular surface of the second half ring body, and the central half ring body is provided with an air inlet.

[0010] As a further optimization scheme of the present invention, the spliced ​​annular sac includes two symmetrically arranged semi-annular sacs, the two semi-annular sacs are respectively connected to the inner circular surfaces of the two middle semi-annular bodies, and the internal space of the semi-annular sacs is connected to the air inlet.

[0011] As a further optimization scheme of the present invention, the inflation and deflation mechanism includes a second circular groove, an exhaust hole and an air guide channel opened on the inner wall of the second circular groove, a fixed plate fixedly connected to the inner wall of the second circular groove, a movable plate coaxially arranged with the fixed plate, a second spring and a telescopic bellows connected between the fixed plate and the movable plate, a limit plate fixedly connected to the inner wall of the exhaust hole, a second adjusting rod slidably connected to the limit plate, a sealing plate connected to one end of the second adjusting rod, a third spring connected between the limit plate and the sealing plate, a plurality of first air holes arranged on the fixed plate, a plurality of second air holes arranged on the movable plate, a first plastic sheet connected to the lower end of the fixed plate, and a second plastic sheet connected to the lower end of the movable plate, the first plastic sheet has only one end connected to the fixed plate, and the first plastic sheet covers a plurality of first air holes, the second plastic sheet has only one end connected to the movable plate, and the second plastic sheet covers a plurality of second air holes, the sealing plate covers the exhaust hole, and the air guide channel is connected to the air inlet.

[0012] As a further optimization solution of the present invention, the spliced ​​annular frame includes two symmetrically arranged C-shaped half-ring frames, and the two C-shaped half-ring frames are respectively connected to the lower ends of the two middle-linked half-ring bodies.

[0013] As a further optimization scheme of the present invention, the circular moving mechanism includes two semi-annular tracks, a semi-annular frame slidably connected to the semi-annular tracks, a semi-annular gear connected to the inner surface of the semi-annular frame, a micro motor and a driving gear connected to the output shaft end of the micro motor. The two semi-annular tracks are respectively connected to the inner walls of the C-shaped semi-annular frames, the micro motor is fixedly installed in one of the C-shaped semi-annular frames, the ultrasonic ranging sensor is fixedly installed on one of the semi-annular frames, and the two semi-annular gears form a ring gear.

[0014] As a further optimization scheme of the present invention, the spliced ​​power supply mechanism includes two semi-ring power supply racks, which are respectively connected to the inner walls of two C-shaped semi-ring frames. The two semi-ring power supply racks form a ring-shaped power supply rack, and the ultrasonic ranging sensor is electrically connected to the ring-shaped power supply rack.

[0015] A fall prevention monitoring and alarm method, using the fall prevention monitoring and alarm device as described above, comprises the following steps:

[0016] Open the open-closed ring body and put it on the user's ankle, and then close the open-closed ring body again;

[0017] Filling gas into the spliced ​​annular sac through the inflation and deflation mechanism until the spliced ​​annular sac wraps around the user's ankle and is fixed on the user's ankle and then stops inflating;

[0018] When the motion information sensor in the control assembly detects that the acceleration of the user's foot in the vertical direction exceeds a threshold, the circular moving mechanism drives the ultrasonic ranging sensor to rotate a set angle within a set time period, and the ultrasonic ranging sensor collects the range of the flat area around the user's foot landing point. When the area of ​​the flat area around the landing point is less than the set threshold, an electrical signal is sent to the buzzer and the micro vibration motor through the integrated control terminal.

[0019] The beneficial effects of the present invention are as follows: the present invention is intended for use by the elderly when moving in a stair area. When the motion information sensor in the control assembly detects that the acceleration of the user's foot in the vertical direction exceeds a threshold, that is, when going down the stairs, the ultrasonic ranging sensor is driven by the circular moving mechanism to rotate multiple times within a set time period, and the range of the flat area around the user's foot landing point is collected. When the area of ​​the flat area around the foot landing point is less than the set threshold, an electrical signal is sent to a buzzer and a micro vibration motor through the integrated control terminal, which can effectively prevent the elderly from slipping or stepping on air when going down the stairs, and can effectively and fundamentally reduce the probability of the elderly falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a diagram showing the matching of the spliced ​​annular frame and the ultrasonic ranging sensor of the present invention;

[0022] Figure 3 It is a matching view of the circular moving mechanism of the present invention and the spliced ​​annular frame;

[0023] Figure 4 It is a matching view of the spliced ​​power supply mechanism and the spliced ​​annular frame of the present invention;

[0024] Figure 5 This is a diagram showing the coordination between the inflation and deflation mechanism of the present invention and the semi-annular bladder;

[0025] Figure 6 It is a schematic diagram of the structure of the limit switch of the present invention;

[0026] Figure 7 The present invention Figure 5 Magnified view at A in the middle;

[0027] Figure 8 The present invention Figure 5 Magnified view at B in the middle;

[0028] Fig. 9 The present invention Figure 5 Enlarged view at center C;

[0029] Fig.10 The present invention Figure 6 Magnified view at D in the middle.

[0030] In the figure: 1, open and close ring body; 101, first semi-ring body; 1010, round hole; 102, second semi-ring body; 1020, first round groove; 103, limit switch; 1031, first round plate; 1032, first adjusting rod; 1033, second round plate; 1034, first spring; 1035, plug; 2, middle semi-ring body; 201, air inlet; 3, semi-ring capsule; 4, inflation and deflation mechanism; 401, fixed plate; 4010, first air hole; 402, second spring; 403, telescopic bellows; 404, movable plate; 4040, second Air hole; 405, first plastic sheet; 406, second plastic sheet; 407, limit plate; 408, second adjusting rod; 409, sealing plate; 410, third spring; 411, second circular groove; 412, exhaust hole; 413, air guide channel; 501, C-shaped semi-ring frame; 6, ultrasonic ranging sensor; 7, circular moving mechanism; 701, semi-ring track; 702, semi-ring frame; 703, semi-ring gear; 704, micro motor; 705, driving gear; 8, spliced ​​power supply mechanism; 801, semi-ring power supply frame; 9, control assembly. DETAILED DESCRIPTION

[0031] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only intended to enable those skilled in the art to better understand and implement the subject matter described herein. In addition, the features described relative to some examples may also be combined in other examples.

[0032] like Figure 1-Figure 10 As shown, an anti-fall monitoring alarm device comprises an open-and-closed ring body 1, a spliced ​​middle ring body connected to the inner circular surface of the open-and-closed ring body 1, a spliced ​​annular capsule connected to the inner circular surface of the spliced ​​middle ring body, two gas charging and discharging mechanisms 4 symmetrically arranged on the open-and-closed ring body 1, a spliced ​​annular frame connected to the lower end of the spliced ​​middle ring body, a circumferential moving mechanism 7 arranged in the spliced ​​annular frame, an ultrasonic ranging sensor 6 connected to the circumferential moving mechanism 7, a spliced ​​power supply mechanism 8 and a control assembly 9 arranged in the spliced ​​annular frame, the two gas charging and discharging mechanisms 4 are used to adjust the amount of gas in the spliced ​​annular capsule, the open-and-closed ring body 1, the spliced ​​middle ring body, the spliced ​​annular capsule, and the spliced ​​annular frame are all coaxially arranged, the circumferential moving mechanism 7 is used to drive the ultrasonic ranging sensor 6 to rotate a set angle around the central axis of the spliced ​​annular frame, and the ultrasonic ranging sensor 6 is used to obtain terrain data in a set area around the spliced ​​annular frame;

[0033] The control assembly 9 includes a power supply, an integrated control terminal, a motion information sensor, a buzzer and a micro-vibration motor. The integrated control terminal, the motion information sensor and the spliced ​​power supply mechanism 8 are all electrically connected to the power supply. The circular moving mechanism 7 is electrically connected to the spliced ​​power supply mechanism 8. The power supply, the integrated control terminal, the motion information sensor, the buzzer and the micro-vibration motor are all existing technologies. Among them, the motion information sensor can adopt a digital motion processor, and the specific model can be adjusted according to the equipment research and development needs.

[0034] It should be noted that when in use, the open-closed ring body 1 is first opened and placed on the user's ankle, and then the open-closed ring body 1 is closed again; gas is filled into the spliced ​​annular capsule through the inflation and deflation mechanism 4 until the spliced ​​annular capsule wraps the user's ankle and is fixed on the user's ankle, and the inflation is stopped. The inflation amount can be adjusted according to the actual thickness of the user's ankle, and it can be suitable for different users to wear without affecting the moving range of the ultrasonic ranging sensor 6. The structure of the entire device is simple, and the material can be selected from lightweight materials, which effectively improves the user's wearing comfort;

[0035] When the motion information sensor in the control assembly 9 detects that the acceleration of the user's foot in the vertical direction exceeds the threshold, the acceleration threshold is 0-0.1m / s 2That is, when the motion information sensor detects that the user's foot is moving in the vertical direction, it is determined that the user is in the process of going up or down the stairs. At this time, the ultrasonic distance sensor 6 is driven by the circular moving mechanism 7 to rotate a set angle within a set time period, such as rotating two to three times within one second, and in the process of rotation, the ground distance in the set area around the foot is continuously obtained. The area of ​​the area around the foot is calculated based on the detection angle range of the ultrasonic distance sensor 6. The data difference collected by the ultrasonic distance sensor 6 when it rotates one circle should be within the set range. For example, in the first circle, the distance difference between the ground distance collected when rotating 30 degrees and the ground distance collected when rotating 60 degrees should be the same as the distance calculated during this period. The calculated foot downward movement distance is the same, which can be calculated according to the real-time acceleration. When the detection data and the calculated data are within the error range, it means that it is a flat area. In this way, the flat area directly below the foot is collected and calculated. The user's foot parameters are initially entered. When the flat area is not enough to support the user's foot or is less than three-quarters of the user's foot area, it is determined that the user may slip when landing, and an electrical signal is sent to the buzzer and the micro vibration motor through the integrated control terminal. If the stair area is a frequently walked area in the user's daily life, and the step area is less than three-quarters of the user's foot area, it can be adjusted according to the user's customization. The adjustment method is to adjust the parameters through the APP.

[0036] The open-and-closed ring body 1 includes a first half ring body 101 and a second half ring body 102, one end of the first half ring body 101 is hinged to one end of the second half ring body 102, and the other end of the first half ring body 101 and the other end of the second half ring body 102 are detachably connected via a limit switch 103;

[0037] The limit switch 103 includes a circular hole 1020 provided on the second semi-ring body 102, a first circular plate 1031 fixedly connected to the upper opening of the circular hole 1020, a first adjusting rod 1032 slidably connected to the middle of the first circular plate 1031, a second circular plate 1033 fixedly connected to the first adjusting rod 1032, an insert block 1035 connected to one end of the first adjusting rod 1032, a first spring 1034 connected between the first circular plate 1031 and the second circular plate 1033, and a first circular groove 1010 provided on the first semi-ring body 101, and the first circular groove 1010 is matched with the insert block 1035.

[0038] It should be noted that, as mentioned above, when the entire product is worn on the user's ankle, the first adjustment rod 1032 is first pulled to remove the plug block 1035 connected thereto from the first circular groove 1020, thereby disengaging the first semi-ring body 101 and the second semi-ring body 102 from the limiting connection relationship. At this time, the first semi-ring body 101 and the second semi-ring body 102 can rotate around the hinge, and the opening can be used for the user's ankle to pass through. After the first semi-ring body 101 and the second semi-ring body 102 are sleeved on the user's ankle, the first adjustment rod 1032 is pulled and the openings of the first semi-ring body 101 and the second semi-ring body 102 are closed together again. At this time, the first adjustment rod 1032 is released, and the first adjustment rod 1032 and the plug block 1035 are reinserted into the first circular groove 1020 under the elastic force of the first spring 1034. In the absence of external force, the first semi-ring body 101 and the second semi-ring body 102 are in a stable closed state.

[0039] The spliced ​​central ring body includes two symmetrically arranged central half ring bodies 2, the two central half ring bodies 2 are respectively connected to the inner circumferential surface of the first half ring body 101 and the inner circumferential surface of the second half ring body 102, and an air inlet 201 is provided on the central half ring body 2;

[0040] The spliced ​​annular capsule includes two symmetrically arranged semi-annular capsules 3, the two semi-annular capsules 3 are respectively connected to the inner circular surfaces of the two middle-connected semi-annular capsules 2, and the internal space of the semi-annular capsules 3 is connected to the air inlet 201;

[0041] The inflation and deflation mechanism 4 includes a second circular groove 411, an exhaust hole 412 and an air guide channel 413 provided on the inner wall of the second circular groove 411, a fixed plate 401 fixedly connected to the inner wall of the second circular groove 411, a movable plate 404 coaxially arranged with the fixed plate 401, a second spring 402 and a telescopic bellows 403 connected between the fixed plate 401 and the movable plate 404, a limit plate 407 fixedly connected to the inner wall of the exhaust hole 412, a second adjusting rod 408 slidably connected to the limit plate 407, a sealing plate 409 connected to one end of the second adjusting rod 408, and a third spring 402 connected between the limit plate 407 and the sealing plate 409. 10. A plurality of first air holes 4010 are provided on the fixed plate 401, a plurality of second air holes 4040 are provided on the movable plate 404, a first plastic sheet 405 connected to the lower end of the fixed plate 401, and a second plastic sheet 406 connected to the lower end of the movable plate 404, the first plastic sheet 405 is connected to the fixed plate 401 at only one end, and the first plastic sheet 405 covers the plurality of first air holes 4010, the second plastic sheet 406 is connected to the movable plate 404 at only one end, and the second plastic sheet 406 covers the plurality of second air holes 4040, the sealing plate 409 covers the exhaust hole 412, and the air guide channel 413 is connected to the air inlet 201.

[0042] It should be noted that, as mentioned above, when the open-close ring body 1 is in an open state, the two middle half-ring bodies 2 and the two half-ring capsule bodies 3 are in a separated state. When the open-close ring body 1 is in a closed state, the two middle half-ring bodies 2 and the two half-ring capsule bodies 3 are reunited into a complete ring body. At this time, the user can hold the first half-ring body 101 and the second half-ring body 102 with both hands respectively, and move them to appropriate positions on the ankle, which can be adjusted by the user, and then press the moving plate with the thumbs of both hands at the same time. 404, when the movable plate 404 moves downward, it squeezes the telescopic bellows 403 and the second spring 402. At this time, the volume between the fixed plate 401, the telescopic bellows 403 and the movable plate 404 is compressed, and the gas therein is squeezed, generating positive pressure. The second plastic sheet 406 on the movable plate 404 is tightly pressed and covered by the gas pressure to cover a plurality of second air holes 4040, while the first plastic sheet 405 on the fixed plate 401 is opened by the gas pressure, and the gas is discharged from the plurality of first air holes 4010 into the fixed plate 40 1, because the exhaust hole 412 is tightly covered by the sealing plate 409, the gas can only flow into the air inlet 201 from the air guide channel 413, and finally enter the semi-annular capsule 3. At this time, the thumb no longer presses the movable plate 404, the second spring 402 is reset, the volume between the fixed plate 401, the telescopic bellows 403 and the movable plate 404 increases, and negative pressure is generated. The first plastic sheet 405 is adsorbed by the negative pressure and tightly attached to the fixed plate 401, covering a plurality of first air holes 404. 010, and the second plastic sheet 406 is opened by negative pressure, and the outside air is sucked in from the second air hole 4040 until the second spring 402 is reset, and then it can be pressed again to achieve the effect of inflating the semi-annular bag 3, until the semi-annular bag 3 expands and bulges to contact the user's ankle and generate corresponding pressure to form a limiting effect. When disassembling or adjusting, press the second adjusting rod 408 so that the sealing plate 409 no longer seals the exhaust hole 412, and exhaust processing can be carried out.

[0043] The spliced ​​annular frame includes two symmetrically arranged C-shaped half-ring frames 501 , and the two C-shaped half-ring frames 501 are respectively connected to the lower ends of the two middle half-ring bodies 2 .

[0044] The circular moving mechanism 7 includes two semi-annular tracks 701, a semi-annular frame 702 slidably connected to the semi-annular tracks 701, a semi-annular gear 703 connected to the inner circumferential surface of the semi-annular frame 702, a micro motor 704 and a driving gear 705 connected to the output shaft end of the micro motor 704. The two semi-annular tracks 701 are respectively connected to the inner walls of the C-shaped semi-annular frames 501, the micro motor 704 is fixedly installed in one of the C-shaped semi-annular frames 501, the ultrasonic ranging sensor 6 is fixedly installed on one of the semi-annular frames 702, and the two semi-annular gears 703 form a ring gear.

[0045] It should be noted that, as mentioned above, when the ultrasonic ranging sensor 6 is driven to rotate by the circular moving mechanism 7, the driving gear 705 is driven to rotate by the micro motor 704. After the driving gear 705 rotates, it can drive the semi-annular gear 703 meshing with it to rotate. When the semi-annular gear 703 meshing with it rotates, it can drive the corresponding semi-annular frame 702 to rotate in the same direction and at the same angle, and push the other semi-annular frame 702 to rotate in the same direction and at the same angle. When the semi-annular frame 702 rotates, it can drive the ultrasonic ranging sensor 6 connected thereto to rotate in the same direction and at the same angle.

[0046] Among them, the spliced ​​power supply mechanism 8 includes two semi-ring power supply racks 801, and the two semi-ring power supply racks 801 are respectively connected to the inner walls of two C-shaped semi-ring frames 501. The two semi-ring power supply racks 801 form a ring power supply rack, and the ultrasonic ranging sensor 6 is electrically connected to the ring power supply rack.

[0047] It should be noted that, during the circular motion, the ultrasonic ranging sensor 6 is always in contact with the two semi-ring power supply racks 801 , and the annular power supply rack formed by the two semi-ring power supply racks 801 can supply power to the ultrasonic ranging sensor 6 .

[0048] The present embodiment is described above, but the present embodiment is not limited to the above-mentioned specific implementation manner. The above-mentioned specific implementation manner is merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, which are all within the protection of the present embodiment.

Claims

1. An anti-fall monitoring alarm device, characterized in that: The invention comprises an openable ring body (1), a spliced ​​middle ring body connected to the inner circular surface of the openable ring body (1), a spliced ​​annular capsule connected to the inner circular surface of the spliced ​​middle ring body, two inflation and deflation mechanisms (4) symmetrically arranged on the openable ring body (1), a spliced ​​annular frame connected to the lower end of the spliced ​​middle ring body, a circumferential movement mechanism (7) arranged in the spliced ​​annular frame, an ultrasonic distance measurement sensor (6) connected to the circumferential movement mechanism (7), and a spliced ​​annular capsule arranged in the spliced ​​annular frame. A power supply mechanism (8) and a control assembly (9), the two gas charging and discharging mechanisms (4) are used to adjust the amount of gas in the spliced ​​annular capsule, the opening and closing ring body (1), the spliced ​​middle ring body, the spliced ​​annular capsule, and the spliced ​​annular frame are all coaxially arranged, the circular movement mechanism (7) is used to drive the ultrasonic distance sensor (6) to rotate around the central axis of the spliced ​​annular frame to a set angle, and the ultrasonic distance sensor (6) is used to obtain terrain data in a set area around the spliced ​​annular frame; The control assembly (9) includes a power supply, an integrated control terminal, a motion information sensor, a buzzer, and a micro-vibration motor. The integrated control terminal, the motion information sensor, and the spliced ​​power supply mechanism (8) are all electrically connected to the power supply, and the circular movement mechanism (7) is electrically connected to the spliced ​​power supply mechanism (8); The spliced ​​middle ring body comprises two symmetrically arranged middle half ring bodies (2); The spliced ​​annular frame comprises two symmetrically arranged C-shaped semi-ring frames (501), wherein the two C-shaped semi-ring frames (501) are respectively connected to the lower ends of two middle-jointed semi-ring bodies (2); The circular moving mechanism (7) comprises two semi-annular tracks (701), a semi-annular frame (702) slidably connected to the semi-annular tracks (701), a semi-annular gear (703) connected to the inner circumferential surface of the semi-annular frame (702), a micro motor (704), and a driving gear (705) connected to the output shaft end of the micro motor (704). The two semi-annular tracks (701) are respectively connected to the inner wall of the C-shaped semi-annular frame (501), the micro motor (704) is fixedly installed in one of the C-shaped semi-annular frames (501), the ultrasonic distance measuring sensor (6) is fixedly installed on one of the semi-annular frames (702), and the two semi-annular gears (703) form a ring gear.

2. The anti-fall monitoring alarm device according to claim 1, characterized in that: The open-and-closed ring body (1) comprises a first half ring body (101) and a second half ring body (102), one end of the first half ring body (101) and one end of the second half ring body (102) are hinged, and the other end of the first half ring body (101) and the other end of the second half ring body (102) are detachably connected via a limit switch (103).

3. The anti-fall monitoring alarm device according to claim 2, characterized in that: The limit switch (103) comprises a circular hole (1020) provided on the second semi-ring body (102), a first circular plate (1031) fixedly connected to the upper opening of the circular hole (1020), a first adjusting rod (1032) slidably connected to the middle of the first circular plate (1031), a second circular plate (1033) fixedly connected to the first adjusting rod (1032), an insert block (1035) connected to one end of the first adjusting rod (1032), a first spring (1034) connected between the first circular plate (1031) and the second circular plate (1033), and a first circular groove (1010) provided on the first semi-ring body (101), wherein the first circular groove (1010) is matched with the insert block (1035).

4. The anti-fall monitoring alarm device according to claim 3, characterized in that: The two central half-ring bodies (2) are respectively connected to the inner circular surface of the first half-ring body (101) and the inner circular surface of the second half-ring body (102), and an air inlet (201) is provided on the central half-ring body (2).

5. The anti-fall monitoring alarm device according to claim 4, characterized in that: The spliced ​​annular bladder body comprises two symmetrically arranged semi-annular bladder bodies (3), the two semi-annular bladder bodies (3) being respectively connected to the inner circular surfaces of two centrally connected semi-annular bodies (2), and the internal space of the semi-annular bladder bodies (3) being in communication with the air inlet (201).

6. The anti-fall monitoring alarm device according to claim 5, characterized in that: The inflation and deflation mechanism (4) comprises a second circular groove (411), an exhaust hole (412) and an air guide channel (413) formed on the inner wall of the second circular groove (411), a fixed plate (401) fixedly connected to the inner wall of the second circular groove (411), a movable plate (404) coaxially arranged with the fixed plate (401), a second spring (402) and a telescopic bellows (403) connected between the fixed plate (401) and the movable plate (404), a limit plate (407) fixedly connected to the inner wall of the exhaust hole (412), a second adjustment rod (408) slidably connected to the limit plate (407), a sealing plate (409) connected to one end of the second adjustment rod (408), and a third spring (410) connected between the limit plate (407) and the sealing plate (409). ), a plurality of first air holes (4010) provided on the fixed plate (401), a plurality of second air holes (4040) provided on the movable plate (404), a first plastic sheet (405) connected to the lower end of the fixed plate (401), and a second plastic sheet (406) connected to the lower end of the movable plate (404), wherein only one end of the first plastic sheet (405) is connected to the fixed plate (401), and the first plastic sheet (405) covers the plurality of first air holes (4010), only one end of the second plastic sheet (406) is connected to the movable plate (404), and the second plastic sheet (406) covers the plurality of second air holes (4040), the sealing plate (409) covers the exhaust hole (412), and the air guide channel (413) is connected to the air inlet (201).

7. The anti-fall monitoring alarm device according to claim 6, characterized in that: The spliced ​​power supply mechanism (8) comprises two semi-ring power supply racks (801), the two semi-ring power supply racks (801) are respectively connected to the inner walls of two C-shaped semi-ring frames (501), the two semi-ring power supply racks (801) form a ring-shaped power supply rack, and the ultrasonic distance measuring sensor (6) is electrically connected to the ring-shaped power supply rack.

8. A fall prevention monitoring alarm method, characterized in that: The anti-fall monitoring alarm device according to any one of claims 1 to 7 comprises the following steps: The openable ring body (1) is opened and placed on the ankle of the user, and then the openable ring body (1) is closed again; Inflate the spliced ​​annular sac with gas through the inflation and deflation mechanism (4) until the spliced ​​annular sac wraps around the user's ankle and is fixed on the user's ankle, and then stop inflating; When the motion information sensor in the control assembly (9) detects that the acceleration of the user's foot in the vertical direction exceeds a threshold value, the ultrasonic distance sensor (6) is driven to rotate at a set angle within a set time period through the circular movement mechanism (7), and the range of the flat area around the footfall point of the user is collected through the ultrasonic distance sensor (6). When the area of ​​the flat area around the footfall point is less than the set threshold value, an electrical signal is sent to the buzzer and the micro vibration motor through the integrated control terminal.

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