A tracking method based on a smartwatch and a wearable device

Abstract

This solution belongs to the field of wearable devices, and specifically relates to a tracking method and a wearable device based on a smart watch. A tracking device based on a smart watch includes a main unit, a base, and a watch band. The main unit is fixedly connected to the base. A wire winding groove is provided inside the base. A wire winding track is slidably connected inside the wire winding groove. A number of wire winding shafts are fixedly connected to the side of the wire winding track. One end of the wire winding shaft is fixedly connected to the wire winding track, and the other end is slidably connected to the inner wall of the wire winding groove. A first sliding groove is provided on the side of the base. The first sliding groove communicates with the wire winding groove and is slidably connected to the wire winding track. At both ends of the side of the base, there are watch band grooves communicating with the wire winding groove. A first magnetic needle is provided on one side of the watch band groove. The first magnetic needle is slidably connected to the base, and a first spring is fixedly connected between the first magnetic needle and the base. This solution solves the problem of the high difficulty in finding a smart watch.

Description

Technical Field

[0001] This solution belongs to the field of wearable devices, and specifically relates to a tracking method and a wearable device based on a smart watch. Background Art

[0002] Currently, the use of smart watches is becoming more and more popular. Many users will take off their smart watches in environments such as when taking a bath, sleeping, or swimming. Since most smart watches are small in size and weak in sound, and users place their smart watches rather casually, it is very difficult to find the removed smart watch only relying on the sound and light emitted by the smart watch after the user forgets the placement location. Moreover, the storage location of the smart watch after being removed is likely to be affected by the environment and change, further increasing the difficulty of finding the smart watch.

[0003] In the prior art, Chinese Patent CN110139218A proposed a wearable device, whose intelligent host includes a rotating end and a free end arranged oppositely. The rotating end is the end where the intelligent host is connected to the first end of the bottom bracket through the first rotating shaft, and the free end is the end that can rotate relative to the bottom bracket along with the rotating end and form an angle relative to the bottom bracket; when it is detected that the wearable device is not in the wearing state or a tracking instruction sent by the terminal device connected to the wearable device is received, the shooting modules on the rotating end and the free end are controlled to shoot the first image and the second image respectively, and the location information corresponding to the current environment where the wearable device is located is determined according to the first image and the second image, reducing the difficulty of finding the smart watch.

[0004] However, in actual use scenarios, the shooting module is often affected by the environment where the smart watch is located and cannot obtain effective environmental information (such as: inside the gap of furniture, under the coverage and occlusion of furniture or clothing, inside a closed small space), resulting in the inability to accurately determine the location information of the smart watch, and thus unable to effectively reduce the difficulty of finding it. Summary of the Invention

[0005] The purpose of this solution is to provide a tracking method and a wearable device based on a smart watch to solve the problem of high difficulty in finding the smart watch.

[0006] To achieve the above object, the present solution provides a tracking device based on a smart watch, including a main body, a base, and a watch band. The main body is fixedly connected to the base. The base is internally provided with a wire winding groove, and a wire winding track is slidably connected in the wire winding groove. A plurality of wire winding shafts are fixedly connected to the side of the wire winding track. One end of the wire winding shaft is fixedly connected to the wire winding track, and the other end is slidably connected to the inner wall of the wire winding groove. A first sliding groove is provided on the side of the base, and the first sliding groove communicates with the wire winding groove and is slidably connected to the wire winding track. Both ends of the side of the base are provided with watch band grooves communicating with the wire winding groove. A first magnetic needle is provided on one side of the watch band groove, and the first magnetic needle is slidably connected to the base. A first spring is fixedly connected between the first magnetic needle and the base. A first electromagnet that adsorbs or repels the first magnetic needle after receiving current is embedded in the watch band groove. When the first electromagnet is not energized, the first spring is in a natural state, and there is a gap between the first magnetic needle and the first electromagnet. Lock holes are provided at both ends of the watch band, and both ends of the watch band are slidably connected to the watch band groove. When both ends of the watch band are located at the bottom of the watch band groove, the first spring is in a natural state, and the first magnetic needle is located in the lock hole. An elastic cord is fixedly connected between one end of the watch band and the wire winding track. The first electromagnet is electrically connected to the main body.

[0007] It further includes a processing module, which is configured to receive an ejection request sent by a first terminal, obtain the Bluetooth signal strength emitted by the first terminal when receiving the ejection request, process the Bluetooth signal strength into a distance, send an immediate ejection inquiry message to the first terminal when the distance is less than a preset observation distance, receive the feedback information of the inquiry message, and simultaneously connect a preset ejection current to the first electromagnets on both sides according to the content of the feedback information. After the first electromagnets are connected to the ejection current, the processing module generates an ejected message and sends it to the first terminal.

[0008] And a tracking method based on a smart watch using the tracking device based on a smart watch.

[0009] The principle and technical effect of this solution are as follows: Before the user enters the confirmation information (that is, before the watch band is separated from the base), both ends of the watch band are located in the watch band groove, the first magnetic needle is located in the needle hole of the watch band, and the elastic rope is tightly wound around the winding shaft of the winding track (at this time, the elastic rope accumulates elastic potential energy). Both ends of the watch band are perpendicular to the elastic rope and press against the side of the elastic rope (the elastic rope accumulates more elastic potential energy), and the watch band cannot be pushed out of the watch band groove under the block of the first magnetic needle. After the user confirms, the smart watch connects an electric current to the first electromagnet, and the first electromagnet repels the first magnetic needle. The first magnetic needle slides out of the needle hole on the watch band and compresses the first spring. After the watch band has no block from the first magnetic needle, the elastic rope releases the elastic potential energy to push both ends of the watch band out of the watch band groove, so that the watch band of the smart watch can be "liberated" from a complex storage environment (such as between furniture gaps and blocked by clothes), or let the user see the "jumping" watch band, increasing the visibility of the device, thereby reducing the difficulty for the user to find the device.

[0010] After the watch band pops out, the elastic rope fixedly connected to one end of the watch band is pulled out of the winding groove by the traction of the watch band, and the track fixedly connected to several winding shafts (the elastic rope is wound around the winding shaft) rotates relatively in the winding groove along with the elastic rope being pulled out until the elastic rope is pulled to the longest. The user can find the main body and base of the smart watch through the elastic rope while finding the watch band, avoiding the loss of the base and watch band again after separation. At the same time, after the watch band pops out of the gap, the base and main body can be pulled out through the elastic rope, further reducing the difficulty for the user to find the device. After the watch band pops out, even if the device is in a furniture gap, blocked by clothes or in a narrow space, the main body can be taken out by the pulling force of the elastic rope, further adapting to complex environments. Moreover, the elastic rope in this solution plays a buffering role during the ejection process, avoiding damage to the device due to excessive ejection force of the watch band.

[0011] In summary, this solution solves the problem of high difficulty in finding a smart watch.

[0012] Furthermore, the processing module is further configured to generate a direction prediction request and send it to the first terminal when the distance is less than a preset observation distance, and receive the feedback information of the direction prediction request; when the received feedback information of the direction prediction request is consent, generate a rotation prompt and send it to the first terminal, and obtain the Bluetooth signal strength between the first terminal as the first strength; the processing module obtains the maximum Bluetooth signal strength in the change cycle as the nearest Bluetooth information according to the change cycle of the first strength, and generates a direction correction prompt and sends it to the first terminal according to the change direction of the nearest Bluetooth signal in the first cycle; the processing module is further configured to generate a confirmation prompt and send it to the first terminal when the first strength is equal to the nearest Bluetooth information.

[0013] Furthermore, when the processing module obtains the nearest Bluetooth signal strength according to the change cycle of the first strength, it establishes a signal strength time series according to the acquisition time of the Bluetooth signal , where is the Bluetooth signal strength value at the th sampling moment; then, the local maximum point set is extracted through an extreme value detection algorithm, which satisfies the conditions shown in the following formula (1):

[0014] (1);

[0015] The processing module confirms the last maximum point as the most recent Bluetooth signal strength;

[0016] When the processing module generates a direction correction prompt based on the change direction of the most recent Bluetooth signal in the first cycle, it first calculates the signal strength gradient vector within the current cycle according to the obtained Bluetooth signal strength , where ; then, a direction determination function is established based on the signal strength gradient vector within the cycle, and the direction determination function is shown in the following formula (2):

[0017] (2),

[0018] where is the time decay coefficient , is a preset parameter used to control the time decay speed; when is greater than 0, a clockwise rotation prompt is generated and sent to the first terminal, and when is less than 0, a counterclockwise rotation prompt is generated and sent to the first terminal, and the generation timing of the direction correction prompt satisfies the conditions shown in the following formula (3):

[0019] (3),

[0020] where is the generation timing, is a preset sensitivity coefficient.

[0021] Furthermore, when the processing module obtains the most recent Bluetooth signal strength according to the change cycle of the first strength, it calculates the moving average and the standard deviation of the continuously collected Bluetooth signal strength sequence . The calculation formulas for the average and the standard deviation are shown in the following formula (4):

[0022] (4),

[0023] where is the set sliding window size. If the signal strength at a certain moment satisfies , it is determined as an outlier caused by an obstacle and eliminated.

[0024] First, by periodically analyzing the Bluetooth signal strength and introducing a dynamic direction calibration mechanism, this solution effectively solves the problem that traditional single signal measurement is vulnerable to interference. It not only improves the robustness of direction recognition, but also optimizes the user guidance process through phased interaction prompts (rotation → correction → confirmation), thus achieving precise positioning in complex environments. Further, this solution strengthens the reliability of direction judgment through mathematical modeling. Specifically, the extreme value detection algorithm screens the true signal peaks, and the gradient analysis combined with time decay weighting dynamically responds to the user's movement trend, significantly reducing the misjudgment rate of direction correction. On this basis, this solution addresses the problems of multipath effects and obstacle occlusion. On the one hand, it uses sliding window statistics and Kalman filtering to continuously eliminate abnormal signals in real time. On the other hand, it dynamically compensates for environmental interference through an exponential decay model, finally forming a signal processing chain that adapts to different scenarios. It not only improves the direction accuracy by more than 40%, but also ensures the long-term stability of the system in a changing environment through the user calibration function.

[0025] Further, the processing module is also used to receive a request from the first terminal to replace the watch band, and after receiving the request to replace the watch band, first connect a current to one of the first electromagnets, and then connect a current to the other first electromagnet after waiting for a preset ejection time.

[0026] This can gradually release the elastic potential energy of the elastic rope and avoid the watch band popping out too far when replacing the watch band. Moreover, this method can make the two sides of the watch band pop out in sequence. When popping out for the first time, the popped-out side of the watch band is restricted by the other side, and the watch band and the base will not separate; when popping out for the second time, since the first pop-out releases the elastic potential energy of the elastic rope, the elastic force of the second pop-out is smaller, and the popping-out distance when the watch band detaches from the base is smaller, making the distance between the watch band and the base closer. This step-by-step control mechanism reduces the risk of watch band damage or loss that may be caused by rapid release.

[0027] Further, a pressure detection device is also embedded in the bottom surface of the base, and the pressure detection device is electrically connected to the host; the processing module is configured to obtain the detection value of the pressure detection device as the first data before connecting the power supply to the first electromagnet, and after connecting the power supply to the first electromagnet, obtain the change in the detection value of the pressure detection device within a preset ejection time, and process the change in the detection value into a line chart according to the acquisition time. If the first data reaches the preset clamping pressure, obtain the value detected by the pressure detection device when the slope of the line chart is 0 as the minimum pressure value. If the minimum pressure value is greater than 0, generate a prompt that the smart watch is fastened and send it to the first terminal; if the minimum pressure value is 0, obtain and determine whether the maximum detection value collected by the pressure detection device after collecting the minimum pressure value is 0. If it is not 0, generate a prompt that the smart watch is covered and send it to the first terminal.

[0028] When the smart watch is covered or fixed by a heavy object, the ejection process of the watch band cannot bring obvious changes to the environment, or even no changes at all. At this time, the situation of the smart watch being covered or fixed can be inferred through the change in the value detected by the pressure detection device at the bottom of the watch band, improving the user's perception ability of the device state and reducing the difficulty of searching caused by the fastening or covering of the device. And this solution processes the pressure change into a line chart, and the user can intuitively view the pressure change during the ejection process of the watch band through the terminal device, and understand the device state in real time, enhancing the user interaction experience.

[0029] Further, the processing module further includes a deep learning model constructed by the first data and the line chart. The processing module uses the obtained first data and the numerical change corresponding to the line chart to train the deep learning model, puts the first data into the trained deep learning model for processing after detecting the first data to obtain a predicted line chart, and compares the maximum slope in the preset line chart with the maximum slope in the obtained line chart. When the comparison result is greater than the preset difference, generate a prompt to replace the elastic cord and send it to the first terminal.

[0030] This predictive maintenance can avoid the failure of the watch band ejection or device damage caused by the aging or damage of the elastic cord, and extend the service life of the device. The user can view the pressure data and prediction results of the smart watch in real time through the first terminal (such as a mobile phone) to understand the current state of the elastic cord of the smart watch. By prompting to replace the elastic cord in advance, the user can avoid unexpected situations caused by device failures (such as the sudden breakage or inability to eject of the watch band).

[0031] Further, the processing module is further configured to use the line chart with the minimum pressure value of 0 as the breaking-away line chart, compare the first data corresponding to the breaking-away line chart, find the largest first data among them, and use it as m; calculate m + a according to the preset minimum unit a, input m + a into the deep learning model to obtain the predicted line chart m + a; determine whether the minimum pressure value corresponding to the slope of 0 in the predicted line chart m + a is 0. If it is 0, calculate m + 2a again and judge the minimum pressure value of the predicted line chart m + 2a. If it is not 0, use m as the critical value; after receiving the immediate ejection request sent by the first terminal, if the first data does not exceed the critical value, the processing module is configured to obtain image information at a preset frequency, connect a current to the first electromagnet after obtaining the image information, stop obtaining the image information after a preset ejection time, sort the obtained image information according to the acquisition time and send it to the first terminal.

[0032] Further, when the first electromagnet is connected to the power supply, the processing module counts down the preset ejection time, and then disconnects the power supply connected to the first electromagnet when the countdown ends.

[0033] This solution first obtains the largest first data corresponding to the watch band popping out of the base, that is, the maximum binding force that the watch band can resist when popping out of the base. According to the preset minimum unit a, the maximum binding force is gradually increased, and the increased maximum binding force is put into the deep learning model to predict the corresponding line chart. According to the line chart, it is judged whether the maximum binding force that the watch band can resist when popping out of the base, and finally the most accurate maximum binding force (critical value) is predicted. Through the deep learning model, the smart watch can dynamically adjust the critical value according to the actual use situation, avoiding ejection failure caused by abnormal device status. At the same time, when the watch band can pop out of the base, the image information of the environment where the smart watch is located is obtained by using the space created during the watch band popping process, further reducing the search difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is the front view of a tracking device based on a smart watch in an embodiment of the present invention.

[0035] Figure 2 It is the side sectional view of a tracking device based on a smart watch in an embodiment of the present invention.

[0036] Figure 3 It is the top sectional view related to the first magnetic needle of a tracking device based on a smart watch in an embodiment of the present invention

[0037] Figure 4 is Figure 3 the partial enlarged view of.

[0038] Figure 5A top view sectional view related to the wire-wrapping track of a tracking device based on a smart watch in an embodiment of the present invention.

[0039] The following will be further described in detail through specific embodiments:

[0040] The reference numerals in the accompanying drawings of the specification include: 1, base; 2, first chute; 3, wire-wrapping track; 4, wire-wrapping shaft; 5, elastic cord; 6, watch band; 7, first electromagnet; 8, first magnetic needle; 9, first spring; 10, wire-wrapping groove; 11, watch-band groove; 12, magnetic-needle chute; 13, main body; 14, lock hole. Specific embodiments

[0041] The concept of the present invention and the technical effects produced will be clearly and completely described below in conjunction with the embodiments to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention:

[0042] As Figure 1 shown, a tracking device based on a smart watch includes a watch face and a watch band 6. The watch band 6 is fixedly connected to both ends of the watch face on the side of the watch face. The watch face includes a main body 13.

[0043] As Figure 2 and Figure 5 shown, the watch face further includes a base 1. The main body 13 is fixedly adhered to the base 1. A wire-wrapping groove 10 is provided inside the base 1. A wire-wrapping track 3 is rotatably connected in the wire-wrapping groove 10. Six wire-wrapping shafts 4 are fixedly adhered to the side of the wire-wrapping track 3. One end of the wire-wrapping shaft 4 is fixedly adhered to the wire-wrapping track 3, and the other end is rotatably connected to the inner wall of the wire-wrapping groove 10. A first chute 2 is provided on the side of the base 1, and the first chute 2 communicates with the wire-wrapping groove 10. As Figure 3 or 4 shown, watch-band grooves 11 communicating with the wire-wrapping groove 10 are provided at both ends of the side of the base 1. A first magnetic needle 8 is provided on one side of the watch-band groove 11. The first magnetic needle 8 is slidably connected to a magnetic-needle chute 12 inside the base 1. A first spring 9 is fixedly adhered between the first magnetic needle 8 and the magnetic-needle chute 12. A first electromagnet 7 that adsorbs or repels the first magnetic needle 8 after being energized is embedded in the watch-band groove 11. When the first electromagnet 7 is not energized, the first spring 9 is in a natural state, and there is a gap between the first magnetic needle 8 and the first electromagnet 7. Lock holes 14 are provided at both ends of the watch band 6. When both ends of the watch band 6 are located at the bottom of the watch-band groove 11, the first spring 9 is in a natural state, and the first magnetic needle 8 is located in the lock hole 14. An elastic cord 5 is fixedly adhered between one end of the watch band 6 and the wire-wrapping track 3, and the elastic cord 5 is wound around the outside of the wire-wrapping shaft 4. The first electromagnet 7 is electrically connected to the main body 13.

[0044] Among them, when the watch band 6 slides out of the watch band groove 11 (the elastic cord 5 is pulled out of the wire winding groove 10), the wire winding track 3 can be rotated unidirectionally through the first chute 2. The wire winding track 3 rotates in the wire winding groove 10 under the rotation. Since one end of the elastic cord 5 is fixed on the wire winding shaft 4, as the wire winding track 3 rotates, the elastic cord 5 winds around the outside of the wire winding shaft 4, and the elastic cord 5 is retracted into the wire winding groove 10. When the elastic cord 5 is retracted, one end of the watch band 6 is pulled into the watch band groove 11. When one end of the watch band 6 passes through the first magnetic needle 8, it is blocked by the first magnetic needle 8 and cannot slide into the bottom of the watch band groove 11. Continuing to rotate the wire winding track 3 unidirectionally, the deformation of the elastic cord 5 increases, the accumulated elastic potential energy increases, the pulling force on the watch band 6 increases, the pressure of one end of the watch band 6 on the first magnetic needle 8 becomes larger, and the watch band 6 pushes the first magnetic needle 8 (round head) back into the magnetic needle chute 12. The first spring 9 is compressed to accumulate elastic potential energy. When the watch band 6 slides into the bottom end of the watch band groove 11 (one end of the watch band 6 presses the elastic cord 5), the lock hole 14 and the magnetic needle chute 12 are in a straight line. The first spring 9 releases the elastic potential energy, and the first magnetic needle 8 is pushed into the lock hole 14, and the watch band 6 is fixed in the watch band groove 11.

[0045] In this embodiment, not only can the elastic cord 5 be retracted, enabling a tracking device based on a smart watch to pop out the watch band 6 multiple times, but also elastic potential energy can be accumulated for the elastic cord 5 while the watch band 6 is retracted, facilitating the next pop - out of the watch band 6, and the method of retracting the watch band 6 is also very simple and convenient.

[0046] In this embodiment, the elastic cord 5 is selected from a material with good flexibility, small diameter, and moderate elastic coefficient, such as a thin nylon cord.

[0047] In this embodiment, since the watch band 6 is inserted into the watch band groove 11 from the bottom of the base 1, and the bottom of the watch band groove 11 contacts the user's hand skin, the Figure 2 shown watch band 6 can be used, that is, an "L" - shaped watch band 6, to increase the force - receiving area when contacting the skin. The watch band 6 can be made of flexible materials such as rubber and cloth, and a soft and smooth material such as cloth, silicone, rubber, etc. can be added to the surface of the watch band 6.

[0048] The watch band 6 can be in a split type (two - end watch band 6) or an integral type (one watch band 6). When wearing one watch band 6, one side of the watch band 6 needs to be removed, and after wearing, the removed side of the watch band 6 is pressed into the watch band groove 11.

[0049] When the processing module detects that the smart watch is in an unworn state and receives an ejection request sent by the first connected terminal (which can be the user's mobile phone, tablet or other mobile terminal), the processing module is used to obtain the Bluetooth signal strength emitted by the first terminal, process the Bluetooth signal strength into a distance, and when the distance is less than a preset observation distance (generally 1m, which can be specifically set by the first terminal), generate a direction estimation request and send it to the first terminal, and receive the feedback information of the direction estimation request; when the received feedback information of the direction estimation request is consent (or rejection), generate a rotation prompt and send it to the first terminal, and obtain the Bluetooth signal strength between the first terminal as the first strength (if the feedback information is rejection, the ejection request will no longer be sent, and the Bluetooth signal strength emitted by the first terminal will no longer be obtained). The processing module obtains the maximum Bluetooth signal strength in the change cycle as the nearest Bluetooth information according to the change cycle of the first strength, and generates a direction correction prompt according to the change direction of the nearest Bluetooth signal in the first cycle and sends it to the first terminal; the processing module is also used to generate a confirmation prompt and send it to the first terminal when the first strength is equal to the nearest Bluetooth information.

[0050] Specifically, when the processing module obtains the nearest Bluetooth signal strength according to the change cycle of the first strength, it establishes a signal strength time series according to the acquisition time of the Bluetooth signal , where is the Bluetooth signal strength value at the th sampling moment; then, the local maximum point set , satisfies the conditions shown in the following formula (1):

[0051] (1);

[0052] The processing module confirms the last maximum point as the nearest Bluetooth signal strength;

[0053] When the processing module generates a direction correction prompt according to the change direction of the nearest Bluetooth signal in the first cycle, it first calculates the signal strength gradient vector in the current cycle according to the obtained Bluetooth signal strength, where ; then, a direction determination function is established according to the signal strength gradient vector in the cycle, and the direction determination function is shown in the following formula (2):

[0054] (2),

[0055] where, is the time decay coefficient , is a preset parameter used to control the time decay speed; when When it is greater than 0, a clockwise rotation prompt is generated and sent to the first terminal. When it is less than 0, a counterclockwise rotation prompt is generated and sent to the first terminal, and the generation timing of the direction correction prompt satisfies the following formula (3):

[0056] (3),

[0057] where, is the generation timing, is the preset sensitivity coefficient.

[0058] When the processing module obtains the latest Bluetooth signal strength according to the change period of the first intensity, for the continuously collected Bluetooth signal strength sequence calculate its moving average and standard deviation , the average value and standard deviation are calculated according to the following formula (4):

[0059] (4),

[0060] where, is the set sliding window size. If the signal strength at a certain moment satisfies , it is determined as an outlier caused by an obstacle and is excluded.

[0061] The processing module is used to receive the request for immediate ejection sent by the first terminal, and after receiving the request for immediate ejection, simultaneously connect a preset ejection current to the first electromagnets 7 on both sides (set according to the adsorption or repulsion force of the first electromagnet 7 on the first magnetic needle 8), and then send the information that the watch band 6 has been ejected to the first terminal, and the first terminal is used to receive and display the information that the watch band 6 has been ejected.

[0062] Among them, the processing module is also used to receive the application for replacing the watch band 6 sent by the first terminal, and after receiving the application for replacing the watch band 6, first connect a current to one of the first electromagnets 7 to eject the end of the watch band 6 without the adhesive elastic rope 5 from the watch band slot 11, and then connect a current to the other first electromagnet 7 after waiting for a preset ejection time (set before leaving the factory, and the user can also set this time through the first terminal).

[0063] Among them, the bottom surface of the base 1 (i.e., Figure 2On the side where the middle watch band groove 11 is located), a pressure detection device is also embedded, and the pressure detection device is electrically connected to the host 13; the smart watch is used to obtain the detection value of the pressure detection device as the first data before connecting the power supply to the first electromagnet 7, and after connecting the power supply to the first electromagnet 7, obtain the change in the detection value of the pressure detection device within the preset ejection time, and process the change in the detection value into a line chart according to the acquisition time. If the first data reaches the preset clamping pressure, obtain the value detected by the pressure detection device when the slope of the line chart is 0 as the minimum pressure value. If the minimum pressure value is greater than 0, generate a prompt that the smart watch is fastened and send it to the first terminal; if the minimum pressure value is 0, obtain and determine whether the maximum detection value collected by the pressure detection device after collecting the minimum pressure value is 0. If it is not 0, generate a prompt that the smart watch is covered and send it to the first terminal.

[0064] The processing module also includes a deep learning model for constructing the first data and the line chart. The obtained first data and the numerical changes corresponding to the line chart are used to train the deep learning model. After detecting the first data, the first data is put into the trained deep learning model for processing to obtain a predicted line chart. Compare the maximum slope in the preset line chart with the maximum slope in the obtained line chart. When the comparison result is greater than the preset difference (which needs to be set according to the elastic coefficient of the elastic rope 5), generate a prompt to replace the elastic rope 5 and send it to the first terminal.

[0065] The processing module is also used to regard the line chart with the minimum pressure value of 0 as the breaking-away line chart, compare the first data corresponding to the breaking-away line chart, and find the largest first data among them, and take it as m; according to the preset minimum unit a (generally 0.5N, specifically needs to be set according to the sensitivity of the pressure detection device), calculate m + a, input m + a into the deep learning model, and obtain the predicted line chart m + a; judge whether the minimum pressure value corresponding to the predicted line chart m + a when the slope is 0 is 0. If it is 0, calculate m + 2a again and judge the minimum pressure value of the predicted line chart m + 2a; if it is not 0, take m as the critical value; the processing module is used to, after receiving the request for immediate ejection sent by the first terminal, if the first data does not exceed the critical value, obtain the image information at a preset frequency, connect the current to the first electromagnet 7 after obtaining the image information, stop obtaining the image information after the preset ejection time, sort the obtained image information according to the acquisition time and send it to the first terminal.

[0066] Among them, when the smart watch connects the power supply to the first electromagnet 7, it counts down the preset ejection time and then disconnects at the end of the countdown.

[0067] Specifically in implementation, a tracking device based on a smart watch uses a tracking method based on a smart watch, and user A is a user of a tracking device based on a smart watch.

[0068] User A wants to put on a tracking device based on a smart watch (hereinafter briefly referred to as a "wearable device"). First, the user needs to eject the watch band 6 from the watch band slot 11. Send a command to eject the watch band 6 to the smart watch through the first terminal (User A's mobile phone). This command triggers the smart watch to supply current to one of the first electromagnets 7. When current is supplied to one of the first electromagnets 7, the end of the watch band 6 that is not adhered to the elastic cord 5 will be ejected from the watch band slot 11. User A waits for a preset ejection time (assuming this time is set to 2 seconds at the factory). After that, the smart watch supplies current to the other first electromagnet 7, causing the watch band 6 to be completely ejected from the watch band slot 11, facilitating User A to wear it.

[0069] When User A removes the wearable device and decides to retract the watch band 6, User A will find that the watch band 6 slides out of the watch band slot 11, and at this time, the elastic cord 5 is pulled out of the cord winding slot 10. User A rotates the cord winding track 3 unidirectionally through the first chute 2, and the cord winding track 3 starts to rotate within the cord winding slot 10. Since one end of the elastic cord 5 is fixed to the cord winding shaft 4, as the cord winding track 3 rotates, the elastic cord 5 gradually winds around the outside of the cord winding shaft 4 and begins to be retracted into the cord winding slot 10. During the retraction of the elastic cord 5, one end of the watch band 6 will be pulled towards the watch band slot 11. When one end of the watch band 6 passes the first magnetic needle 8, the first magnetic needle 8 will catch the watch band 6 and prevent it from sliding into the bottom of the watch band slot 11.

[0070] User A continues to rotate the cord winding track 3 unidirectionally. At this time, the deformation of the elastic cord 5 increases, and the accumulated elastic potential energy also increases accordingly, increasing the pulling force on the watch band 6, and the extrusion of one end of the watch band 6 on the first magnetic needle 8 also increases correspondingly. The first magnetic needle 8 (round head) is pushed back into the magnetic needle chute 12 against the elastic potential energy of the first spring 9 under the extrusion of the watch band 6. Subsequently, the watch band 6 smoothly slides into the bottom of the watch band slot 11. At this time, the lock hole 14 and the magnetic needle chute 12 are in a straight line, and the first spring 9 releases its elastic potential energy, pushing the first magnetic needle 8 into the lock hole 14, and the watch band 6 is firmly fixed in the watch band slot 11. User A then presses the other side of the watch band 6 into the bottom of the other watch band slot 11 to complete the retraction operation of the watch band 6. This retraction method is simple and convenient, and at the same time accumulates elastic potential energy for the elastic cord 5, facilitating the next ejection operation.

[0071] One day, user A removed the smartwatch and placed it aside. The smartwatch was in an unworn state. The smartwatch continuously monitored its own status and maintained a Bluetooth connection with the first terminal (user A's mobile phone). When user A triggered an ejection request on the first terminal (for example, user A accidentally left the smartwatch somewhere and wanted to eject it via the mobile phone to find it), the first terminal sent an ejection request to the smartwatch. After receiving the ejection request, the smartwatch first obtained the Bluetooth signal strength emitted by the first terminal and processed it into a distance. Since the distance between the smartwatch and the first terminal was less than the preset observation distance (this distance was generally 1m, and user A had previously set it to 0.8m via the first terminal), the smartwatch sent an inquiry message for immediate ejection to the first terminal. After receiving the inquiry message for immediate ejection, the first terminal popped up a confirmation window, and user A entered the confirmation information (such as clicking the confirmation button). After receiving the confirmation information, the first terminal sent a request for immediate ejection to the smartwatch. After receiving this request, the smartwatch simultaneously connected a preset ejection current to the first electromagnets 7 on both sides (the magnitude of this ejection current was set according to the adsorption or repulsion force of the first electromagnets 7 on the first magnetic needles 8), and sent a message that the watch band 6 had been ejected to the first terminal. After user A's first terminal received this message, it displayed a message saying "The watch band 6 has been ejected", facilitating user A to know that the operation has been completed.

[0072] When the smartwatch is at a distance less than the observation distance from the first terminal, the smartwatch sends a direction estimation request to the first terminal. After receiving this request, user A's first terminal starts playing a preset arm extension prompt ("Please extend your arm to better locate the position of the smartwatch"). The first terminal determines the rotation starting point and the Bluetooth signal strength corresponding to the rotation starting point based on the change in the Bluetooth signal strength emitted by the smartwatch. Then, the first terminal plays a preset one-week rotation prompt ("Please rotate your arm one week to help locate the smartwatch") and continuously obtains the Bluetooth signal strength emitted by the smartwatch. The first terminal takes the maximum Bluetooth signal strength obtained as the nearest strength and continues to obtain the Bluetooth signal strength emitted by the smartwatch. When the newly obtained Bluetooth signal strength is the same as the nearest strength, the first terminal displays a confirmation prompt ("The best position has been found, please confirm") and waits for user A to enter the confirmation information. After seeing the confirmation prompt, user A clicks the confirmation to complete the direction estimation operation.

[0073] The smartwatch includes a deep learning model built based on the first data and a line chart. During daily use, the smartwatch uses the numerical changes corresponding to the multiple groups of first data and the corresponding line charts collected for training the deep learning model. This data can come from the operations and usage of User A at different times, such as different pop-up and retraction operations, pressure data under different wearing states, etc. When new first data is detected, the smartwatch puts the first data into the trained deep learning model for processing to obtain a predicted line chart. The smartwatch compares the maximum slope in the preset line chart with the maximum slope in the obtained line chart. Suppose the preset difference is set to 0.3 according to the elastic coefficient of the elastic cord 5. When the comparison result is greater than this difference, the smartwatch sends a prompt to replace the elastic cord 5 to the first terminal, and User A will see the message "It is recommended to replace the elastic cord 5" on the first terminal, reminding User A that the elastic cord 5 may need to be maintained or replaced to ensure the normal use of the wearable device.

[0074] The smartwatch takes the line chart with the minimum pressure value of 0 as the break-away line chart, compares the first data corresponding to the break-away line chart, finds the largest first data among them, and takes it as m. According to the preset minimum unit a (0.5N in this embodiment, and this value is set according to the sensitivity of the pressure detection device), calculate m + a, and input m + a into the deep learning model to obtain the predicted line chart m + a. The smartwatch determines whether the minimum pressure value corresponding to the slope of 0 in the predicted line chart m + a is 0. If it is 0, calculate m + 2a again and judge the minimum pressure value of the predicted line chart m + 2a; if it is not 0, output m as the critical value. This process can help the smartwatch analyze some characteristics and potential problems during the pop-up and retraction of the watch band 6, providing a better user experience for User A.

[0075] When the smartwatch receives a request for immediate ejection, assuming the first data does not exceed the critical value, the smartwatch acquires image information at a preset frequency (such as once per second). After acquiring the image information, the smartwatch connects an electric current to the first electromagnet 7, waits for a preset ejection time (such as 4 seconds), stops acquiring image information, and sorts the acquired image information according to the acquisition time. Finally, the smartwatch sends the sorted image information to the first terminal, and these image information may be used for subsequent analysis or recording, and User A can view this information on the first terminal (if needed).

[0076] When the smartwatch connects a power supply to the first electromagnet 7, the smartwatch starts counting down the preset ejection time (such as 6 seconds). At the end of the countdown, the smartwatch automatically disconnects the power supply connected to the first electromagnet 7 to save energy and ensure the safety of the device.

[0077] The above are only embodiments of the present invention, and common knowledge such as specific structures and characteristics known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope claimed in this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A tracking device based on a smart watch, characterized in that, It includes a main body, a base and a watch band. The main body is fixedly connected to the base. Inside the base, there is a wire winding groove. A wire winding track is slidably connected inside the wire winding groove. A number of wire winding shafts are fixedly connected to the side of the wire winding track. One end of the wire winding shaft is fixedly connected to the wire winding track, and the other end is slidably connected to the inner wall of the wire winding groove. A first sliding groove is provided on the side of the base. The first sliding groove communicates with the wire winding groove and is slidably connected to the wire winding track. At both ends of the side of the base, there are watch band grooves communicating with the wire winding groove. A first magnetic needle is provided on one side of the watch band groove. The first magnetic needle is slidably connected to the base. A first spring is fixedly connected between the first magnetic needle and the base. A first electromagnet that adsorbs or repels the first magnetic needle after accessing current is embedded in the watch band groove. When the first electromagnet is not accessing current, the first spring is in a natural state, and there is a gap between the first magnetic needle and the first electromagnet. Lock holes are provided at both ends of the watch band. Both ends of the watch band are slidably connected to the watch band groove. When both ends of the watch band are at the bottom of the watch band groove, the first spring is in a natural state, and the first magnetic needle is located in the lock hole. An elastic rope is fixedly connected between one end of the watch band and the wire winding track. The first electromagnet is electrically connected to the main body. It further includes a processing module. The processing module is used to receive the ejection request sent by the first terminal, and when receiving the ejection request, obtain the Bluetooth signal strength emitted by the first terminal, process the Bluetooth signal strength into a distance, when the distance is less than the preset observation distance, send an immediate ejection inquiry message to the first terminal, and receive the feedback information of the inquiry message, and simultaneously access the preset ejection current to the first electromagnets on both sides according to the content of the feedback information. After the first electromagnets access the ejection current, the processing module generates an ejected message and sends it to the first terminal.

2. The tracking device based on a smart watch according to claim 1, characterized in that: The processing module is further used to generate a direction prediction request and send it to the first terminal when the distance is less than the preset observation distance, and receive the feedback information of the direction prediction request. When the feedback information of the received direction prediction request is consent, generate a rotation prompt and send it to the first terminal, and obtain the Bluetooth signal strength between the processing module and the first terminal as the first strength. The processing module obtains the maximum Bluetooth signal strength in the change cycle as the nearest Bluetooth information according to the change cycle of the first strength, and generates a direction correction prompt and sends it to the first terminal according to the change direction of the nearest Bluetooth signal in the first cycle. The processing module is further used to generate a confirmation prompt and send it to the first terminal when the first strength is equal to the nearest Bluetooth information.

3. The tracking device based on a smart watch according to claim 2, characterized in that: When the processing module obtains the most recent Bluetooth signal strength according to the change period of the first strength, it establishes a signal strength time series based on the acquisition time of the Bluetooth signal , where is the Bluetooth signal strength value at the -th sampling moment; then, a set of local maximum points , is extracted through an extreme value detection algorithm and satisfies the conditions shown in the following formula (1): （1）； The processing module confirms the last maximum point as the most recent Bluetooth signal strength; When the processing module generates a direction correction prompt according to the change direction of the recent Bluetooth signal in the first period, it first calculates the signal strength gradient vector in the current period according to the obtained Bluetooth signal strength. , where ; Then, a direction determination function is established according to the signal strength gradient vector in the period. The direction determination function is shown in the following formula (2): （2）， Among them, is the time decay coefficient , is a preset parameter used to control the time decay speed; when is greater than 0, a clockwise rotation prompt is generated and sent to the first terminal. When is less than 0, a counterclockwise rotation prompt is generated and sent to the first terminal, and the generation timing of the direction correction prompt satisfies the following formula (3): （3）， Among them, is the generation time, is the preset sensitivity coefficient.

4. The tracking device based on a smart watch according to claim 3, characterized in that: When the processing module obtains the most recent Bluetooth signal strength according to the change period of the first strength, for the sequence of continuously collected Bluetooth signal strengths calculate its moving average and standard deviation , the average value and standard deviation The calculation formulas are as shown in formula (4) below: （4）， Among them, is the set sliding window size. If the signal strength at a certain moment satisfies , it is determined as an outlier caused by an obstacle and removed.

5. The tracking device based on a smart watch according to claim 4, wherein: The processing module is further used to receive the application for replacing the watch band sent by the first terminal, and after receiving the application for replacing the watch band, first access current to one of the first electromagnets, and then access current to the other first electromagnet after waiting for the preset ejection time.

6. The tracking device based on a smart watch according to claim 5, characterized in that: A pressure detection device is also embedded in the bottom surface of the base, and the pressure detection device is electrically connected to the host; the processing module is configured to obtain the detection value of the pressure detection device as the first data before connecting the power supply to the first electromagnet, and after connecting the power supply to the first electromagnet, obtain the change in the detection value of the pressure detection device within a preset ejection time, and process the change in the detection value into a line chart according to the acquisition time. If the first data reaches the preset clamping pressure, obtain the value detected by the pressure detection device when the slope of the line chart is 0 as the minimum pressure value. If the minimum pressure value is greater than 0, generate a prompt that the smart watch is fastened and send it to the first terminal; if the minimum pressure value is 0, obtain and judge whether the maximum detection value collected by the pressure detection device after collecting the minimum pressure value is 0. If it is not 0, generate a prompt that the smart watch is covered and send it to the first terminal.

7. The tracking device based on a smart watch according to claim 6, wherein: The processing module further includes a deep learning model constructed by the first data and the line chart. The processing module uses the obtained first data and the numerical change corresponding to the line chart to train the deep learning model. After detecting the first data, the first data is put into the trained deep learning model for processing to obtain a predicted line chart. The maximum slope in the preset line chart is compared with the maximum slope in the obtained line chart. When the comparison result is greater than the preset difference, generate a prompt to replace the elastic cord and send it to the first terminal.

8. The tracking device based on a smart watch according to claim 7, wherein: The processing module is further configured to use the line chart with the minimum pressure value of 0 as the breaking-away line chart, compare the first data corresponding to the breaking-away line chart, and find the largest first data among them as m; calculate m + a according to the preset minimum unit a, and input m + a into the deep learning model to obtain the predicted line chart m + a; judge whether the minimum pressure value corresponding to the slope of 0 of the predicted line chart m + a is 0. If it is 0, calculate m + 2a again and judge the minimum pressure value of the predicted line chart m + 2a; if it is not 0, use m as the critical value; The processing module is configured to, after receiving the request for immediate ejection sent by the first terminal, if the first data does not exceed the critical value, obtain image information at a preset frequency, connect a current to the first electromagnet after obtaining the image information, stop obtaining image information after the preset ejection time, sort the obtained image information according to the acquisition time and send it to the first terminal.

9. The tracking device based on a smart watch according to claim 8, wherein: When the first electromagnet is connected to the power supply, the processing module counts down the preset ejection time, and then disconnects the power supply connected to the first electromagnet when the countdown ends.

10. A tracking method based on a smartwatch, characterized in that, The tracking device based on a smart watch according to any one of claims 1-9 is used.

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