Children's Myopia Prevention and Control Radar

Abstract

The present invention provides a children's myopia prevention and control radar, comprising: a head-mounted body, provided with symmetrically arranged side support parts, and a front support part connecting the wearing part and contacting the forehead; a first force adjustment structure and a second force adjustment structure are arranged in the unilateral side support part, and the elastic force and deformation shape of the head-mounted support are always within a suitable range by changing the elastic deformation force, elastic deformation amount and elastic deformation shape of the material, and the elastic force and deformation shape are automatically adapted to heads of different sizes without any manual adjustment; an ultrasonic ranging radar and a reading environment light illumination sensor are arranged to realize timely detection and reminder of the reading distance and the reading environment light illumination; through human-computer interaction, the three key parameters of the reading distance, the reading environment light illumination and the reading time are all controlled within the range of the area that is not easy to cause myopia, thereby achieving the purpose of preventing myopia.

Description

Technical Field

[0001] The present invention relates to the technical field of myopia prevention and control, and in particular to a children's myopia prevention and control radar. Background Art

[0002] Preventing myopia among children has always been a global problem. The popularity of digital products such as mobile phones and PADs has exacerbated the severity of this problem.

[0003] In terms of myopia prevention among children, although relevant national institutions, schools and parents have taken many measures to prevent myopia, the results are not ideal. These measures can be summarized into the following categories.

[0004] Eye exercise method: Eye exercise is to relax the eye muscles and improve blood microcirculation by moving the eyeballs up and down, left and right, looking near and far, etc., to achieve a certain myopia prevention effect. This method usually takes about 15 minutes per operation. It is usually recommended to do it once every 45 minutes of reading time, that is, about 60 minutes per time. It takes a lot of time in total, the process is hard and boring, and most children find it difficult to meet the requirements for the time and frequency of eye exercises, and not many children can persist in it for a long time.

[0005] Parental posture supervision method: Parents supervise their children's reading posture so that their children have a correct reading posture to prevent myopia. The main supervision indicators are: reading distance, lighting intensity of the reading environment, reading duration, etc. The disadvantages of this method are: parents have great cognitive differences in their understanding and judgment of these supervision indicators, and even wrong cognition, and poor consistency in execution; it is difficult to achieve accurate supervision, real-time supervision, and supervision of the entire reading process; parents' frequent talk and intervention can easily lead to children's disgust; parents' occasional supervision and intervention will interfere with children's reading.

[0006] Reading posture meter: By placing an object on the reading table that restricts the body from bending freely, the reader's eyes are forced to keep a sufficient distance from the reading material, thereby achieving a certain purpose of preventing myopia. Disadvantages of this method: It restricts personal freedom and is not ergonomic; the place of use is fixed and cannot be used without leaving the reading table; it only prevents myopia by controlling the reading distance, and fails to include important parameters that cause myopia, such as the illumination of the reading environment and the reading time; it has a small scope of application and cannot be used in reading scenarios on mobile devices such as mobile phones and PADs.

[0007] Vision care instruments: There are two types of such instruments. The first type: through the instrument to massage the eyes, relax the eye muscles, improve blood microcirculation, etc., to achieve a certain purpose of alleviating myopia. The second type: through the instrument to watch some virtual images or videos, similar to 3D movies, to achieve a certain purpose of myopia prevention; its principle is to track and watch these images or videos, so that the eyes can produce different spatial movements such as far and near, up and down, left and right, so as to relax the eye muscles and achieve a certain myopia prevention effect; its essence is the instrument-assisted version of eye exercises. The disadvantages of these two types of vision care instruments: they take up time exclusively, and other things cannot be done during operation; they are post-event remedies, not pre-event prevention, nor are they interventions during the process; they do not prevent myopia from the perspectives of reading distance, light intensity of the reading environment, reading time, etc. that cause children's myopia; the effect of myopia prevention is average.

[0008] To sum up, the shortcomings and deficiencies of existing myopia prevention methods and instruments are summarized as follows: they require exclusive time to use, or are not ergonomically designed, or are post-remedies rather than pre-prevention or real-time myopia prevention during the non-reading process; except for the reading posture instrument that prevents myopia by controlling the "reading distance", almost all others are based on eye muscle massage or exercise, improving eye microcirculation or muscle relaxation to prevent myopia, and do not prevent myopia from the root cause of myopia, such as "reading distance is too close"; they hinder children's physical movements; the effect of myopia prevention is unsatisfactory, and it is troublesome to use. Children are less willing to use it for a long time, and automatically give up after using it for a period of time; they fail to fundamentally solve the century-old problem of children's myopia. Summary of the invention

[0009] In view of the above problems, the present invention provides a child myopia prevention and control radar to improve the effect of child myopia prevention and control.

[0010] The technical solution provided by the present invention is as follows:

[0011] A children's myopia prevention and control radar, comprising:

[0012] The head-mounted body is provided with symmetrically arranged side support parts and a front support part connecting the wearing part and contacting the forehead;

[0013] A first force adjustment structure and a second force adjustment structure are arranged in the unilateral side support portion, the first force adjustment structure is arranged at a first position close to the front support portion, and a first groove structure with more than two grooves is arranged on the inner side of the head-mounted body; the second force adjustment structure is arranged at a second position away from the front support portion, and a second groove structure with more than two grooves is arranged on the inner side of the head-mounted body; the distance between the grooves in the second groove structure is greater than the distance between the grooves in the first groove structure.

[0014] In this technical solution, the first force adjustment structure and the second force adjustment structure are configured on the unilateral support part, that is, there are 4 head-mounted force adjustment structures on both sides of the device. Each force adjustment structure is in the form of a groove structure with at least 2 continuous local thinning thicknesses. By changing the elastic deformation force, elastic deformation amount, and elastic deformation shape of the material, the elastic force and deformation shape of the head-mounted support are always within a suitable range, and automatically adapt to different ages of 3-16 years old with a circumference range of 45-58cm and different sizes of heads without any manual adjustment. The device is worn on the middle of the forehead and about 3cm above the ear, which does not affect the user's continued wearing of glasses, and the user experience of the device is good. In addition, the device has low manufacturing costs, is easy to mass produce, and has the basis for popular use.

[0015] Further preferably, three grooves of the same size are evenly arranged in the first force adjustment structure and the second force adjustment structure.

[0016] In this technical solution, two force adjustment structures are configured by evenly disposing three grooves of the same size to achieve automatic step-by-step adjustment of the force, thereby improving the adaptability of the device and the comfort of the wearer.

[0017] Further preferably, the child myopia prevention and control radar is configured with a head-mounted sensing unit and a processor electrically connected to each other;

[0018] The head-mounted sensing unit comprises:

[0019] The contact layer is arranged on the inner surface of the head-mounted body, at the middle position of the front support part;

[0020] The sensing electrode is arranged inside the head-mounted body and corresponds to the position of the contact layer to realize the perception of the head-mounted state;

[0021] The processor is placed inside the head-mounted body and includes:

[0022] A data acquisition module, used to acquire the perception data of the head-mounted perception unit;

[0023] The data processing module is connected to the data acquisition module and is used to determine whether the device is in a head-mounted state based on the perception data of the head-mounted perception unit, thereby controlling the operation of the child myopia prevention and control radar.

[0024] In this technical solution, the wearing status is detected by the head-mounted sensing unit, thereby achieving timely perception of the head-mounted status.

[0025] Further preferably, the child myopia prevention and control radar is also configured with an ultrasonic ranging sensor connected to the processor. The ultrasonic ranging sensor is located on the outside of the head-mounted body and is arranged in the middle position of the front support part. After the processor determines that the child myopia prevention and control radar is in a head-mounted state, it is used to control the operation of the ultrasonic ranging sensor according to preset rules and process the perception data of the ultrasonic ranging sensor to obtain the distance between the eyes and the reading target object.

[0026] In this technical solution, an ultrasonic distance measuring sensor is configured to detect the distance to the reading target, thereby achieving timely and accurate detection of the reading distance.

[0027] Further preferably, in the processor:

[0028] The data acquisition module is also used to obtain detection data of the ultrasonic ranging sensor at a preset frequency;

[0029] The data processing module is also used to process the detection data acquired by the data acquisition module to obtain the distance between the reading target object and the reading distance segment in which it is located in the reading distance segment division table, sample and count the frequency of occurrence of each reading distance segment in each basic reading time unit, and determine the one with the highest frequency weight as the reading distance segment of the basic reading time unit; the reading distance segment division table is predetermined according to the needs of myopia prevention and control, including the segment characteristics of each reading distance segment that affect the degree of myopia.

[0030] In this technical solution, the detected distance is graded according to the reading distance segment classification table, so that the user can timely and deeply understand the details of the reading distance and achieve more accurate myopia prevention.

[0031] Further preferably, the child myopia prevention and control radar is also configured with a reading environment light illumination sensor electrically connected to the processor, which is arranged on the outer surface of the front support part of the head-mounted body, close to the ultrasonic ranging sensor, and is used to detect the ambient light illumination of the central area of ​​the field of vision after the processor determines that the current state is close-range reading.

[0032] The processor is also used to obtain detection data of the reading environment light illumination sensor at a preset frequency, control the reading environment light illumination sensor to work according to a preset rule, and process the detection data of the reading environment light illumination sensor.

[0033] In this technical solution, by configuring a reading environment light illumination sensor to detect the ambient light illumination, timely detection, accurate detection and timely reminder of the reading light illumination are achieved.

[0034] Further preferably, the data processing module in the processor is also used to process the detection data acquired by the data acquisition module to obtain the reading environment light illumination and the light illumination segment in which it is located in the reading environment light illumination segment division table, sample and count the frequency of occurrence of each reading environment light illumination segment in each basic reading time unit, and determine the one with the highest frequency weight as the reading environment light illumination segment of the basic reading time unit; the reading environment light illumination segment division table is predetermined according to the needs of myopia prevention and control, including the degree to which each reading environment light illumination segment affects myopia.

[0035] In this technical solution, the reading environment light illumination is graded according to the reading environment light illumination segment division table, so that users can timely and deeply understand the details of the reading environment light illumination and achieve more accurate myopia prevention.

[0036] Further preferably, the child myopia prevention and control radar is also configured with an early warning device electrically connected to the processor, for performing early warning operations according to the processing results of the processor and pre-configured early warning rules;

[0037] The warning device includes a sound warning device and a display warning device. The sound warning device emits a sound warning under the control of the processor, and the display warning device warns by changing the color and flashing frequency of an LED indicator light under the control of the processor. The LED warning indicator light is located directly below the front center of the head-mounted body.

[0038] Further preferably, the data processing module in the processor is also used to count the reading distance segment distribution of each basic reading time unit, so as to obtain the reading distance segment with the highest weight ratio in the historical cumulative reading time of a specific duration, and to count the reading environment light illumination segment distribution of each basic reading time unit, so as to obtain the reading environment light illumination segment with the highest weight ratio in the historical cumulative reading time of a specific duration.

[0039] The warning rules include:

[0040] Reading distance sections defined according to the different degrees of impact on myopia and warning prompts corresponding to each reading distance section;

[0041] Reading environment light intensity zones defined according to the different degrees of impact on myopia and early warning prompts corresponding to each reading environment light intensity zone;

[0042] The single reading time defined according to age differences and the corresponding warning prompts for each single reading time;

[0043] The warning prompts corresponding to the reading distance segment with the highest weight or the reading environment light illumination segment with the highest weight in the recent historical cumulative reading time of a specific length of time.

[0044] In this technical solution, the prevention of myopia by this device is based on prior prevention and process prevention, with reading and prevention in parallel, rather than remedial prevention afterwards; it allows parents to say goodbye to unscientific, subjective, and arbitrary intervention in the prevention of myopia in their children; during the myopia prevention monitoring process, the device does not need to monopolize the reader's time, which greatly reduces the relevant supervision time of parents.

[0045] Through the ultrasonic ranging radar, timely detection, accurate detection and timely reminder of the reading distance are achieved; through the light intensity sensor, timely detection, accurate detection and timely reminder of the reading light intensity are achieved; the important indicator parameters that cause myopia, such as reading distance, reading environment light intensity, reading time, etc., are reasonably graded and segmented, realizing precise control of the myopia prevention process; through human-computer interaction, the three key parameters of reading distance, reading environment light intensity and reading time are controlled within the area that is not easy to cause myopia, thereby achieving the purpose of myopia prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and their implementation methods.

[0047] Figure 1 This is a schematic diagram of the structure of the children's myopia prevention and control radar in the present invention;

[0048] Figure 2 This is a schematic diagram of the structure of the children's myopia prevention and control radar in the present invention;

[0049] Figure 3 This is a schematic diagram of the structure of the children's myopia prevention and control radar in the present invention;

[0050] Figure 4 Schematic diagram showing the change of myopia degree S with reading distance L in the present invention;

[0051] Figure 5 This is a schematic diagram showing the effect of reading time on myopia degree in the present invention;

[0052] Figure 6 A schematic diagram showing the effect of the reading environment light intensity below or above the normal range on the degree of myopia in the present invention;

[0053] Figure 7 A circuit schematic diagram of a control circuit board in an example of the present invention;

[0054] Figure 8 For Figure 7 The workflow diagram of the children's myopia prevention and control radar in the example.

[0055] Reference numerals:

[0056] 1 / 21-ultrasonic ranging sensor, 2 / 22-reading ambient light sensor, 3-head-mounted body, 4-second force adjustment structure, 5-first force adjustment structure, 6-power switch, 7-sound warning device, 8-display warning device, 9-battery and charging components, 10 / 25-head-mounted sensing unit, 11-MCU / CPU processor, 12-front support part, 13 / 14-side support part, 23-speaker, 24-LED status indicator light, 26-battery power supply unit. DETAILED DESCRIPTION

[0057] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0058] The first embodiment of the present invention is a radar for preventing and controlling myopia in children, such as Figure 1-3 As shown, it includes: a head-mounted body 3, configured with symmetrically arranged side support parts 13 / 14, and a front support part 12 connecting the wearing part and contacting the forehead; a first force adjustment structure 5 and a second force adjustment structure 4 are configured in the unilateral side support part 13 / 14, wherein the first force adjustment structure 5 is arranged at a first position close to the front support part 12, and a first groove structure with more than two grooves is arranged on the inner side of the head-mounted body 3; the second force adjustment structure 4 is arranged at a second position away from the front support part 12, and a second groove structure with more than two grooves is arranged on the inner side of the head-mounted body; the distance between the grooves in the second groove structure is greater than the distance between the grooves in the first groove structure.

[0059] In this embodiment, the child myopia prevention and control radar is a portable, head-mounted myopia prevention and control device. The head-mounted body 3 is a shell for wearing on the user's forehead. The preparation material can be selected according to the actual application, such as plastic. When the user wears the child myopia prevention and control radar, the front support part is fully in contact with the central area of ​​the forehead of the person. The side support parts are located on the left and right sides of the front support part, respectively, and contact the head at a certain distance (about 3 cm) above the left and right ears. At the same time, it extends along the head contour to the middle and back of the head to achieve more complete contact with the head. The shell space plane in the head-mounted state is roughly parallel to the plane where the ears and eyes are located and is about 3 cm apart. There are 4 head-mounted force adjustment structures on both sides of the device (one side includes the first force adjustment structure and the second force adjustment structure). Each force adjustment structure uses a continuous groove structure with at least 2 local thinning thicknesses. By changing the elastic deformation force, elastic deformation amount, and elastic deformation shape of the material, the elastic force and deformation shape of the head-mounted support are always within a suitable range, automatically adapting to heads of different ages (even adults) from 3 to 16 years old with a circumference range of 45 to 58 cm, without any manual adjustment. The device is worn about 3 cm above the middle of the forehead and the ear, which does not affect the user's continued wearing of glasses, and the user experience of the device is good. In actual applications, the parameters such as the number of grooves, the size of the grooves, and the distance between the grooves configured in the first force adjustment structure 5 and the second force adjustment structure 4 can be configured according to the actual application. There is no specific limitation here, as long as the adjustment purpose can be achieved.

[0060] In one embodiment, three grooves of the same size are evenly arranged in the first force adjustment structure and the second force adjustment structure, such as Figure 3 shown.

[0061] The first force adjustment structure A consists of three adjacent grooves A1, A2 and A3 (corresponding to the attached Figure 3 18, 19 and 20) in the figure, with a center spacing of about 4mm, a groove depth of about 0.5-1.0mm, and a thickness of the side support part 13 / 14 where it is located is about 2.5-3mm. When worn on the head, this structure can change the elastic force, elastic deformation, and deformation shape of the side support, and the magnitude of the change varies with the width of the head. When the head width is small (such as 12cm head width), there is almost no adjustment effect; when the head width is medium (such as 14cm head width), there is a slight adjustment effect; when the head width is large (such as 16cm head width), the adjustment range is large. When this force adjustment structure exists, the side support elastic force felt by the head is smaller than when there is no such force adjustment structure, and the elastic force felt by the head falls within a comfortable range; if there is no such structure, the elastic force will be too large and uncomfortable when the head width is large.

[0062] The second force adjustment structure B consists of three adjacent grooves B1, B2, and B3 (corresponding to the attached Figure 3 15, 16 and 17) in the figure, with a center spacing of about 15mm, a groove depth of about 0.5-1.0mm, and a thickness of the side support of about 2.5-3mm. When worn on the head, this structure can change the elastic force, elastic deformation, and deformation shape of the side support, and the magnitude of the change varies with the circumference of the head. When the head circumference is small (such as a 45cm head circumference), the B3 adjustment function is enabled; when the head circumference is medium (such as a 53cm head circumference): the B3 and B2 adjustment functions are enabled in sequence; when the head circumference is large (such as a 58cm head circumference): the B3, B2, and B1 adjustment functions are enabled in sequence (because the length, width, and inner circumference of the head support are smaller than the corresponding head dimensions when not worn on the head. Therefore, the side support will definitely undergo elastic deformation when worn on the head). When this force adjustment structure exists, the side support elastic force felt by the head is smaller than that without this force adjustment structure, and the elastic force felt by the head falls within a comfortable range, avoiding discomfort caused by excessive elastic force; when this force adjustment structure exists, the deformation of the side support will tend to change in a direction that fits the shape of the head, so that the elastic force acting on the head is more evenly distributed, avoiding discomfort caused by excessively concentrated elastic force.

[0063] The above embodiment is improved to obtain this embodiment. In this embodiment, Figure 1 / Figure 2 / Figure 3 As shown, the child myopia prevention and control radar is equipped with a head-mounted sensing unit 10 and a processor (not shown in the figure) that are electrically connected to each other, wherein the head-mounted sensing unit 10 includes: a contact layer, which is arranged on the inner surface of the head-mounted body, in the middle position of the front support part; a sensing electrode, which is arranged on the PCB board inside the head-mounted body, corresponding to the position configuration of the contact layer, to realize the perception of the head-mounted state (automatically identify whether the head-mounted state is or not). The processor is placed inside the head-mounted body, including: a data acquisition module, which is used to obtain the perception data of the head-mounted sensing unit; a data processing module, which is connected to the data acquisition module, and is used to determine whether it is in the head-mounted state according to the perception data of the head-mounted sensing unit, and then control the operation of the child myopia prevention and control radar. The contact layer is one of the head support points, and the material, size, structure, etc. may be determined according to the actual application. For example, the material can be selected as silicone that can contact the skin, and it is configured as a rectangular boss structure of about 8*20mm. To ensure the normal operation of the children's myopia prevention and control radar, as shown in the figure, a power switch 6, an internal battery and a charging component 9 should be configured on the head-mounted body to provide working power to the entire device. The built-in battery can be charged through a charging port (such as a Type-C USB port), and the battery power is configured according to demand.

[0064] In order to save power, the head-mounted state recognition operation can be pre-agreed according to the sensing state of the head-mounted sensing unit, as shown in Table 1:

[0065] Table 1: Head-mounted status recognition operation conventions

[0066] Head-mounted status recognition Device Status Headset status not detected When the device detects that it is not in head-mounted mode, it enters standby power saving mode Head-mounted status sensing When the headset is detected, it enters normal working mode

[0067] The above embodiment is improved to obtain this embodiment. In this embodiment, Figure 1 / Figure 2 / Figure 3 As shown, the child myopia prevention and control radar is equipped with an ultrasonic distance sensor 1 (capable of transmitting and receiving ultrasonic waves). The ultrasonic distance sensor 1 is arranged outside the head-mounted body, in the middle of the front support part, and is used to detect the distance between the eye and the reading target after the processor determines that the child myopia prevention and control radar is in the head-mounted state; the processor is arranged inside the head-mounted body, and is used to control the operation of the ultrasonic distance sensor according to pre-set rules, and to process the perception data of the ultrasonic distance sensor to obtain the distance between the eye and the reading target. The configuration of the ultrasonic distance sensor realizes the timely and accurate detection of the reading distance, and the selection can be determined according to the needs. For example, in one example, an ultrasonic distance sensor with an accuracy of centimeters and a receiving and transmitting frequency of 40kHz is selected, or an ultrasonic distance sensor with an accuracy of millimeters and a receiving and transmitting frequency of 300kHz is selected.

[0068] Long-term observation of myopia in real life has found that the degree of myopia S is closely related to the reading distance L, such as Figure 4 As shown in the figure, S represents the degree of myopia of the eye, and the larger the value, the more serious the myopia; L represents the distance between the human eye and the reading object, and the default unit is centimeters (cm). The changing relationship in the figure can be approximately expressed by the following function:

[0069] S=ka x

[0070] Where k is a coefficient, x is the reading distance (corresponding to L), 0﹤a﹤1. The human eye has a near vision blind spot, and the near vision blind spot of children is ≈8cm. The human eye cannot see objects in the near vision blind spot clearly through focusing or adjustment, and is limited to 8﹤x﹤∞.

[0071] It can be seen that the degree of myopia S will decrease as the reading distance L (corresponding to x in the formula) increases, and increasing the reading distance can effectively prevent myopia.

[0072] 8﹤L≤25cm. Human eyes are prone to myopia if they look at objects for a long time within this distance.

[0073] 25﹤L≤50cm, within this distance range, the degree of myopia S will decrease significantly as the reading distance L increases;

[0074] 50﹤L﹤∞cm, human eyes are not prone to myopia when viewing objects for a long time within this distance range.

[0075] Based on this, in order to conduct more accurate human-computer interaction and achieve better myopia prevention effects, the reading distance L is divided into multiple levels or ranges, as shown in Table 2.

[0076] Table 2: Reading distance segment division table

[0077]

[0078] It should be understood that the above is only an example of a reading distance segment division, which can be adjusted according to actual conditions in the application. The processor processes the acquired detection data in accordance with the divided reading distance segment division table. Specifically, the data acquisition module in the processor is also used to obtain the detection data of the ultrasonic ranging sensor at a preset frequency; the data processing module is also used to process the detection data acquired by the data acquisition module, obtain the distance to the reading target and the reading distance segment in which it is located in the reading distance segment division table, sample and count the frequency of occurrence of each reading distance segment in each basic reading time unit, and determine the reading distance segment with the highest frequency weight as the basic reading time unit; the reading distance segment division table is predetermined according to the needs of myopia prevention and control, including the segment characteristics of each reading distance segment that affect the degree of myopia.

[0079] In this embodiment, when the device is in the head-mounted state, the ultrasonic distance sensor continuously and periodically detects the distance L between the human eye and the reading target object with K1 as the sampling period (such as K1 = 5 seconds), and performs statistical analysis on the detection data with a time period N1 (N1 = n*K1, n is an integer), and the number distribution of each segment in the reading distance segment division table in Table 2 for the n reading distance L values ​​detected within the N1 period is statistically analyzed, and the reading distance segment with the largest number of distributions is determined as the reading distance segment of the reading time unit, so as to facilitate subsequent operations based on the distance segment, such as statistical reading distance historical distribution, early warning operations, etc. Specifically, if the distance segment is extremely myopia distance segment 1 or myopia distance segment 2, a voice or sound warning is issued to warn the reader to immediately adjust the reading distance to other ranges, so as to achieve the purpose of real-time and accurate myopia prevention. It should be understood that the detection frequency, statistical period and other parameters of the ultrasonic detector can be adjusted according to actual conditions.

[0080] For the convenience of description, the sampling period and basic statistical period of reading distance / reading environment illumination are agreed as shown in Table 3, where basic statistical period = minimum statistical period, 1 basic reading time unit = 1 basic statistical period.

[0081] Table 3 Sampling period and basic statistical period agreement table of reading distance / reading environment illumination

[0082] Sampling period Basic statistical period Reading distance 5 seconds / time 180 seconds / time Reading ambient light levels 60 seconds / time 180 seconds / time

[0083] In addition to the reading distance from the reading object mentioned above, the reading time T also has an impact on the degree of myopia S. The trend of its influence is as follows: Figure 5 As shown in the figure, T refers to the cumulative total reading time within a long period of time (such as 20 days, 50 days, 100 days, etc.), in hours, S represents the degree of myopia of the eyes, and L represents the distance between the human eye and the reading target. Curve A represents the schematic diagram of the change of myopia degree S with the reading distance L when the reading time is longer T; curve B represents the schematic diagram of the change of myopia degree S with the reading distance L when the reading time is shorter T. It can be seen from the figure that within the reading range of 8﹤L﹤50cm, the degree of myopia S will increase with the increase of reading time T. In addition, the size of a single reading time also has a certain impact on myopia. If the single reading time t is too large, the degree of myopia S will increase; if the single reading time t is too small, the reading efficiency will be reduced. Based on this, in order to conduct more accurate human-computer interaction and achieve a better myopia prevention effect, the following three better single reading time t options are set while considering people's reading habits and factors conducive to myopia prevention, as shown in Table 4. It is recommended that users take a 10-20 minute break between two reading sessions.

[0084] Table 4: Single reading time t option table

[0085] Single reading duration serial number Single reading time range illustrate 1 30 minutes Suitable for preschoolers 2 45 minutes Suitable for primary school students 3 60 minutes Suitable for elementary school students, junior high school students and high school students

[0086] It should be understood that the above is only an example of a single reading time t option, which can be adjusted according to actual conditions in the application. For the divided single reading time t option table, in the processor, the data processing module is also used to determine whether it is in a close-up reading state based on the distance between the reading target object and the detection data of the ultrasonic ranging sensor; if it is determined to be in a close-up reading state, the wearing time of the children's myopia prevention and control radar is further counted according to the perception data of the head-mounted sensing unit, thereby obtaining the close-up reading time, and the reading status during the reading period is obtained by statistics; the close-up reading state is determined by the segment characteristics of the reading distance segment division table.

[0087] In this embodiment, when the device is in the head-mounted state, it determines whether it is currently in the close-range reading state (e.g., reading distance within 100 cm is regarded as close-range reading) by analyzing the reading distance value obtained by the ultrasonic ranging sensor. After the close-range reading state begins, the system counts the close-range reading time. When the continuous reading time reaches the predetermined time as shown in Table 4, it can further issue a prompt in the form of sound and light to remind the reader to stop reading or take a proper rest before continuing reading.

[0088] In addition, the data processor will also collect statistics on the reading status within the recent specific cumulative reading time. For example, for the recent actual effective reading time of 1 hour or 10 hours, the weight distribution of the reading distance value / reading environment light illumination value in the reading distance segment table / reading environment light illumination segment table will be statistically analyzed, so that readers can know their past reading status overview in a timely manner to guide the prevention of myopia in the later stage, as shown in Table 5.

[0089] Table 5 Reading distance / ambient light illumination historical status statistical duration agreement table

[0090]

[0091]

[0092] The above embodiment is improved to obtain this embodiment. In this embodiment, Figure 1 / Figure 2 / Figure 3 As shown, the child myopia prevention and control radar is also equipped with a reading environment light illuminance sensor 2 electrically connected to the processor, which is arranged on the outer surface of the front support part of the head-mounted body, close to the ultrasonic ranging sensor 1 (on one side of the ultrasonic ranging sensor, near the middle position), and is used to detect the ambient light illuminance of the central area of ​​the field of vision after the processor determines that the current state is in a close-range reading state; the processor is also used to obtain the detection data of the reading environment light illuminance sensor at a preset frequency, and control the reading environment light illuminance sensor according to pre-set rules, and process the detection data of the reading environment light illuminance sensor (including obtaining the ambient light illuminance value according to the brightness value detected by the ambient light sensor). The reading environment light illuminance sensor realizes timely and accurate detection of the reading light illuminance. The model of the reading environment light illuminance sensor can also be selected according to the application, such as selecting a sensor with a resolution of 0.01lux.

[0093] Long-term observation of myopia in real life also found that the illumination E of the reading environment has a great influence on the degree of myopia S. The influence trend is as follows: Figure 6As shown in the figure, S represents the degree of myopia of the eye, and L represents the distance between the human eye and the reading target object. Curve A' represents the schematic diagram of the change of myopia degree S with the reading distance L when the illuminance E>1000lux (strong) or E﹤300lux (weak); curve B' represents the schematic diagram of the change of myopia degree S with the reading distance L when the illuminance is between 300-1000lux (normal illumination). It can be seen from the figure that within the reading range of 8﹤L﹤50cm, when E﹤300lux or E﹥1000lux, the degree of myopia S will increase significantly (compared with normal illumination) due to insufficient or excessive illumination E in the reading environment.

[0094] Based on this, in order to conduct more accurate human-computer interaction and achieve better myopia prevention effects, the ambient light intensity is divided into multiple sections, as shown in Table 6.

[0095] Table 6: Reading environment light illumination range table

[0096] Segment number Illuminance range (lux) Segment characteristics 1 ﹤300lux Weak illumination 2 [300-420) Better illumination 3 [420-820) Good illumination 4 [820-1000) Better illumination 5 ≥1000 Strong illumination

[0097] It should be understood that the above is only an example of a reading environment light illumination segment division, which can be adjusted according to actual conditions in the application. The processor processes the acquired detection data in accordance with the divided reading environment light illumination segment division table. Specifically, the processor includes: a data acquisition module, which is used to acquire the detection data of the reading environment light illumination sensor at a preset frequency; a data processing module, which is connected to the data acquisition module, and is used to process the detection data acquired by the data acquisition module, obtain the ambient light illumination and the illumination segment in which it is located in the reading environment light illumination segment division table, sample and count the frequency of occurrence of each ambient light illumination segment in each basic reading time unit, and determine the one with the highest frequency weight as the reading environment light illumination segment of the basic reading time unit; the reading environment light illumination segment division table and the duration of the basic reading time unit are predetermined according to the needs of myopia prevention and control, including defining different levels of ambient light illumination segments and segment characteristics according to different ambient light illuminations that affect vision.

[0098] In this embodiment, when the device is in the head-mounted state, the reading environment light illuminance sensor continuously and periodically detects the brightness value within the reading sight range with K2 as the sampling period (such as K2=60 seconds), and performs statistical analysis and processing on the detection data with a time period N2 (N2=n*K2, n is an integer), and the number distribution of each segment in the reading environment light illuminance segment division table in Table 6 of the n reading environment light illuminance values ​​detected within the N2 period is counted, and the reading environment light illuminance segment with the largest number of distribution is determined as the reading distance segment of the reading time unit, so as to facilitate subsequent operations based on the environment light illuminance segment, such as statistical reading environment light illuminance historical distribution, early warning operation, etc. Specifically, if the brightness value segment is the weak illumination segment 1 or the strong illumination segment 5, a voice or sound warning is also issued at the same time, warning the reader to improve the reading lighting in time, eliminate the hidden dangers of myopia caused by insufficient or excessive illumination, and achieve the purpose of real-time and accurate myopia prevention. It should be understood that the detection period, statistical period and other parameters of the reading environment light illuminance sensor can be adjusted according to actual conditions.

[0099] In the above embodiments, the accurate detection or calculation of the three key parameters that cause myopia, namely, reading distance, reading environment illumination, and single reading time, is described. In practical applications, the corresponding hardware is configured in the children's myopia prevention and control radar to prompt the reading parties in time, and through human-computer interaction, the three key indicators are controlled within the optimal or better range, so as to achieve the purpose of real-time and accurate myopia prevention.

[0100] The above embodiment is improved to obtain this embodiment. In this embodiment, Figure 1 / Figure 2 / Figure 3 As shown, the child myopia prevention and control radar is also configured with an early warning device electrically connected to the processor, which is used to perform early warning operations according to the processing results of the processor and pre-configured early warning rules; the early warning device includes a sound early warning device 7 and / or a display early warning device 8. The sound early warning device 7 emits a sound warning under the control of the processor, and the display early warning device 8 indicates the main information or status by emitting light of different colors and different periodic intervals under the control of the processor: including reading distance, ambient light illumination, single reading duration, other equipment status, etc.

[0101] In order to achieve a better warning effect, in this embodiment, a warning device is configured in the child myopia prevention and control radar, so as to perform a warning operation in response to the data obtained in the processor to prompt the user. In practical applications, the sound warning device can be a speaker, installed at any position of the head-mounted body, to give timely prompts for reading distance, reading environment light illumination, single reading time, etc. The display warning device can be an LED indicator light, installed on the head-mounted body in a position that is convenient for the reader's peripheral vision to see, such as directly below the center position of the outer side of the front support part, etc., so that both eyes can see the light indication it emits, so as to give timely indications for reading distance, reading environment light illumination, etc.

[0102] The warning rules include:

[0103] 1) Reading distance segments are defined according to the different degrees of impact of reading distance on vision, and warning prompts corresponding to different distance segments. In one example, the reading distance prompt / warning agreement is shown in Table 7.

[0104] Table 7: Reading distance tips / warning conventions

[0105] Reading distance (cm) grade Horn prompt LED prompt (green) illustrate ﹤18 Very close 5 consecutive beeps 5 consecutive flashes Horn warning + LED prompt [18-25) close 4 consecutive beeps 4 consecutive flashes Horn warning + LED prompt [25-33) generally No sound 3 consecutive flashes LED Indication [33-43) Better No sound 2 consecutive flashes LED Indication ≥43 good No sound 1 flash LED Indication

[0106] 2) Ambient light illumination zones defined according to the different degrees of influence of reading environment light illumination on vision, and early warning prompts corresponding to different ambient light illumination zones. In one example, the reading environment light illumination prompt / warning convention is shown in Table 8.

[0107] Table 8: Reading ambient light illumination prompt convention

[0108] Reading ambient light intensity (lux) grade Horn prompt LED prompt (orange) illustrate ﹤300 Insufficient illumination No sound 4 consecutive flashes LED Indication [300-350) Illumination is acceptable No sound 2 consecutive flashes LED Indication [350-450) Good illumination No sound 1 flash LED Indication [450-500) Good illumination No sound 1 flash LED Indication [500-1000) Illumination is acceptable No sound 3 consecutive flashes LED Indication ≥1000 Strong illumination No sound 5 flashes LED Indication

[0109] 3) Single reading duration options are defined according to the different degrees of impact of single reading duration on vision, and warning prompts corresponding to different single reading durations. In one example, the single reading duration prompt agreement is shown in Table 9.

[0110] Table 9: Single reading duration prompt convention

[0111] Single reading duration (minutes) Horn prompt LED prompt (green) illustrate 30 1 sound Always on 1 long beep (lasts 3 seconds) 45 2 consecutive beeps Always on 2 long beeps (1 second pause) 60 3 consecutive beeps Always on 3 long beeps (1 second pause)

[0112] 4) Early warning prompts corresponding to the reading distance segment with the highest weight or the reading environment light intensity segment with the highest weight in the recent historical cumulative reading time of a specific length of time. In one example, the highest weight prompt agreement for the reading distance segment / reading environment light intensity segment in the last 1 hour / 10 hours is shown in Table 10.

[0113] Table 10: Highest weight prompt convention for reading distance segment / reading environment illumination segment in the last 1 hour / 10 hours

[0114]

[0115] The child myopia prevention and control radar provided by the present invention is based on prior prevention and process prevention, and reading and prevention are carried out in parallel, rather than post-remedial prevention. Based on the above warning rules, parents and children can more accurately perceive and identify the reading distance and reading environment illumination that are conducive to myopia prevention, so that parents can say goodbye to unscientific, subjective, and arbitrary intervention in the prevention of myopia in their children, and further, even when the child myopia prevention and control radar of the present invention is not worn, myopia prevention can be achieved to a certain extent. During use, there is no need to monopolize the reader's time, which greatly reduces the relevant supervision time of parents.

[0116] In one example, the ultrasonic ranging radar is configured with an ultrasonic ranging sensor 21, a reading ambient light sensor 22, a head-mounted housing (corresponding to the head-mounted body), a power switch, a speaker 23, an LED status indicator 24, a battery power supply unit 26 (battery and its charging components), a head-mounted sensing unit 25 and a control circuit board (corresponding to the MCU / CPU processor 11). The circuit schematic diagram of the control circuit board is shown in FIG. Figure 7 shown.

[0117] The control circuit board is encapsulated inside the head-mounted shell, and is composed of an MCU microcontroller, an ultrasonic transmission circuit, an ultrasonic reception circuit, a bandpass filter circuit, a power management circuit, etc. The control circuit board is an FPC flexible PCB. The tasks of the MCU microcontroller include: ultrasonic transmission, ultrasonic reception and calculation analysis, ambient light data processing, head-mounted perception and recognition processing, speaker sound control, LED indicator control, battery power detection, power management, etc.

[0118] like Figure 8 As shown, during the working process, after the power switch is pressed to start, the head-mounted sensing unit 25 is controlled to sense the wearing state. After the processor determines that it is currently in the head-mounted state, it enables the ultrasonic distance sensor to detect the current reading distance and determines whether it is currently in the close-up reading state. Determination of the close-up reading state: Under the premise that the head-mounted state is sensed, it is determined by the distance and fluctuation amplitude characteristics between the eyes and the reading target. Any situation where the distance fluctuation amplitude is 0 will not be identified as the close-up reading state. If it is the close-up reading state, then:

[0119] According to the reading distance detected by the ultrasonic ranging sensor, the LED light (green) is driven to indicate the range of the reading distance L; when the reading distance L<25cm, the horn is also driven to warn, and the reader adjusts the reading distance according to the prompt (human-computer interaction).

[0120] When reading at close range, the reading environment light sensor is enabled to detect the current reading environment light, and based on the detected environment light E, the LED light (orange) is driven to indicate the range of the environment light E. When E<300lux or E>1000lux, the LED light also issues a warning, and the reader changes the environment light according to the prompt (human-computer interaction).

[0121] The duration of a single reading session is detected through a combination of a head-mounted sensing unit and an ultrasonic ranging sensor. When the reading session lasts 30, 45, or 60 minutes, a prompt is given through a constant LED light and different horn sounds (or voice).

[0122] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be pointed out that ordinary relevant personnel in this technical field can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A children's myopia prevention and control radar, characterized in that: include: The head-mounted body is provided with symmetrically arranged side support parts and a front support part connecting the wearing part and contacting the forehead; A first force adjustment structure and a second force adjustment structure are arranged in the unilateral side support portion, wherein the first force adjustment structure is arranged at a first position close to the front support portion, and a first groove structure having more than two grooves is arranged on the inner side of the head-mounted body; the second force adjustment structure is arranged at a second position away from the front support portion, and a second groove structure having more than two grooves is arranged on the inner side of the head-mounted body; the distance between the grooves in the second groove structure is greater than the distance between the grooves in the first groove structure; The child myopia prevention and control radar is equipped with a head-mounted sensing unit and a processor electrically connected to each other; The head-mounted sensing unit comprises: The contact layer is arranged on the inner surface of the head-mounted body, at the middle position of the front support part; The sensing electrode is arranged inside the head-mounted body and corresponds to the position of the contact layer to realize the perception of the head-mounted state; The processor is placed inside the head-mounted body and includes: A data acquisition module, used to acquire the perception data of the head-mounted perception unit; A data processing module, connected to the data acquisition module, for determining whether the head-mounted state is in accordance with the sensing data of the head-mounted sensing unit, and then controlling the operation of the child myopia prevention and control radar; The child myopia prevention and control radar is also equipped with an ultrasonic distance measuring sensor connected to the processor, and the ultrasonic distance measuring sensor is arranged outside the head-mounted body and in the middle of the front support part, and is used to control the ultrasonic distance measuring sensor to work according to a preset rule after the processor determines that the child myopia prevention and control radar is in the head-mounted state, and to process the perception data of the ultrasonic distance measuring sensor to obtain the distance between the eye and the reading target object; In the processor: The data acquisition module is also used to obtain detection data of the ultrasonic ranging sensor at a preset frequency; The data processing module is further used to process the detection data acquired by the data acquisition module, obtain the distance to the reading target object and the reading distance segment in the reading distance segment division table, sample and count the frequency of each reading distance segment in each basic reading time unit, and determine the one with the highest frequency weight as the reading distance segment of the basic reading time unit; the reading distance segment division table is predetermined according to the needs of myopia prevention and control, and includes the segment characteristics of each reading distance segment that affect the degree of myopia; In the processor, the data processing module is also used to determine whether it is in a close-up reading state according to the distance between the eye and the reading target object obtained by the detection data of the ultrasonic ranging sensor; based on the perceived head-mounted state data and the distance detection data of the close-up reading target object, the wearing time of the children's myopia prevention and control radar, the close-up reading state duration, and other reading state data during the reading period are statistically obtained; the close-up reading state is determined by the distance between the eye and the reading target object and the fluctuation amplitude characteristics on the premise that the head-mounted state is perceived; The child myopia prevention and control radar is also equipped with a reading environment light illumination sensor electrically connected to the processor, which is arranged on the outer surface of the front support portion of the head-mounted body, close to the ultrasonic ranging sensor, and is used to detect the ambient light illumination of the central area of ​​the field of vision after the processor determines that the current state is close-range reading; The processor is also used to obtain detection data of the reading environment light illumination sensor at a preset frequency, control the reading environment light illumination sensor to work according to a preset rule, and process the detection data of the reading environment light illumination sensor; The data processing module in the processor is also used to process the detection data acquired by the data acquisition module to obtain the reading environment light illumination and the light illumination segment in which it is located in the reading environment light illumination segment division table, sample and count the frequency of occurrence of each reading environment light illumination segment in each basic reading time unit, and determine the one with the highest frequency weight as the reading environment light illumination segment of the basic reading time unit; the reading environment light illumination segment division table is predetermined according to the needs of myopia prevention and control, including the degree to which each reading environment light illumination segment affects myopia.

2. The child myopia prevention and control radar according to claim 1, characterized in that: The first force adjustment structure and the second force adjustment structure are evenly configured with three grooves of the same size.

3. The child myopia prevention and control radar according to claim 1, characterized in that: The child myopia prevention and control radar is also equipped with an early warning device electrically connected to the processor, which is used to perform early warning operations according to the processing results of the processor and pre-configured early warning rules; The warning device includes a sound warning device and a display warning device. The sound warning device emits a sound warning under the control of the processor, and the display warning device warns by changing the color and flashing frequency of an LED indicator light under the control of the processor. The LED warning indicator light is located directly below the front center of the head-mounted body.

4. The child myopia prevention and control radar as claimed in claim 3, characterized in that: The data processing module in the processor is further used to count the reading distance segment distribution of each basic reading time unit, so as to obtain the reading distance segment with the highest weight ratio in the historical cumulative reading time of a specific duration, and to count the reading environment light illumination segment distribution of each basic reading time unit, so as to obtain the reading environment light illumination segment with the highest weight ratio in the historical cumulative reading time of a specific duration; The warning rules include: Reading distance sections defined according to the different degrees of impact on myopia and warning prompts corresponding to each reading distance section; Reading environment light intensity zones defined according to the different degrees of impact on myopia and early warning prompts corresponding to each reading environment light intensity zone; The single reading time defined according to age differences and the corresponding warning prompts for each single reading time; The warning prompts corresponding to the reading distance segment with the highest weight or the reading environment light illumination segment with the highest weight in the recent historical cumulative reading time of a specific length of time.

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