CN109941407B - Outdoor child swim ring capable of prompting safety information and safety detection method thereof - Google Patents
Outdoor child swim ring capable of prompting safety information and safety detection method thereof Download PDFInfo
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- CN109941407B CN109941407B CN201910368014.1A CN201910368014A CN109941407B CN 109941407 B CN109941407 B CN 109941407B CN 201910368014 A CN201910368014 A CN 201910368014A CN 109941407 B CN109941407 B CN 109941407B
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Abstract
The invention discloses an outdoor child swim ring for prompting safety information and a safety detection method thereof, wherein a plurality of air bags are arranged in a swim ring body, and the outdoor child swim ring further comprises: the pressure sensor evenly distributed at the outside upper surface of water wing body installs at the outside luminescence alarm module of water proof switch of water wing body and be located inside barometric sensor, power module and the control module of water wing body, through adopting the method of detecting water wing safety anomaly, reduce the sensor and judge the condition emergence of anomaly, let the head of a family can observe the water wing in real time, when water wing gas leakage, children break away from the water wing or when water wing is too far away from the cell-phone, the water wing can make sound and flash of light automatically, simultaneously the cell-phone of head of a family also can vibrate the warning, then just can in time remind the head of a family when children's swimming runs into danger, avoid drowned incident's emergence.
Description
Technical Field
The invention relates to the field of intelligent control systems, in particular to an outdoor child swim ring capable of prompting safety information and a safety detection method thereof.
Background
Nowadays, many parents like to swim in summer with the children going to the river, seaside and other outdoor places, and the outdoor swimming can not only enable the children to enjoy beautiful sceneries, but also exercise the bodies of the children, and help the children to remove summer heat and cool in hot summer. Although outdoor swimming is interesting over indoor swimming, the safety of children cannot be well guaranteed, tragedy of swimming drowning of children frequently occurs, and people have to pay attention to the tragedy.
For children who have not learned swimming, the swim ring is the best safety guarantee for the children. At present, the swimming ring on the market has various shapes, but structurally maintains the design of a single annular air bag, and has great potential safety hazard. When the swimming ring leaks air or the child breaks away from the swimming ring, the child is easy to drown, and often when drowned, the child is unable to call for help, and parents and surrounding personnel are unable to be called for rescue.
If an outdoor child swim ring capable of being connected with a mobile phone in a wireless mode exists, the swim ring is of a multi-air-bag structure, and after one air bag leaks air, other air bags can ensure the whole work; secondly, information such as the position and the air pressure of the user can be transmitted to a mobile phone of a parent, so that the parent can observe the situation of the swim ring in real time; thirdly, when the swimming ring leaks air, the child breaks away from the swimming ring or the swimming ring is too far away from the mobile phone, the swimming ring can automatically make sound and flash, and meanwhile, the mobile phone of the parent can also vibrate to give an alarm, so that the parent can be timely reminded when the child encounters danger in swimming, and the occurrence of a drowning event is avoided.
Disclosure of Invention
The invention aims to: in order to solve the defects of the prior art, the outdoor child swim ring capable of prompting safety information and the safety detection method thereof can transmit the information of the position, the air pressure and the like to the mobile phone of a parent, so that the parent can observe the condition of the swim ring in real time, when the swim ring leaks air, the child breaks away from the swim ring or the swim ring is too far away from the mobile phone, the swim ring can automatically make sound and flash, and meanwhile, the mobile phone of the parent can also vibrate to give an alarm, so that the child can prompt the parent in time when encountering danger in swimming, the occurrence of a drowning event is avoided, and the method is stable and reliable, and the occurrence of abnormal judgment of a sensor is reduced.
The technical scheme is as follows: in order to achieve the above object, the outdoor child swim ring for prompting safety information according to the present invention comprises: the swim ring body is internally provided with a plurality of air bags, and the swim ring further comprises: the pressure sensors are uniformly distributed on the upper surface of the outer part of the swim ring body, and the luminous alarm module and the waterproof switch which are arranged on the outer part of the swim ring body, and the air pressure sensor, the power supply module and the control module which are positioned in the swim ring body;
the control module is connected with the pressure sensor, the air pressure sensor, the luminous alarm module and the power module and comprises a core circuit part, a man-machine interaction part and an antenna part.
The external pressure sensor is used for detecting the pressure of the child to the swim ring, and when the external pressure sensor fuses the value F tn When the swimming life is less than F1 newton, the swim ring flashes to alarm and the mobile phone of the family is vibrated to alarm, so that the danger that the child breaks away from the swim ring is indicated; when the sum of the detected pressures is greater than F2 newtons, the swim ring display screen displays that the swim ring pressure detection has a problem, and the problem is sent to the mobile phone of the parent to be known by the parent. In this embodiment, an IM-S-Y-Z40-10 kg film pressure sensor is used, and these threshold parameter values may be set by buttons in the present invention, if not manually set, with default F1 of 20 and F2 of 600.
The air pressure sensor is used for detecting the air pressure in each air bag of the swim ring, when the air pressure in each air bag of the swim ring body is reduced by more than T2% in T1 seconds or the air pressure in the air bag is lower than T3%, the swim ring flashes to give an alarm and the mobile phone of the family is vibrated to give an alarm, so that the air bag leaks, hidden danger exists, the air pressure sensor adopts an IM-S-Y-Z40-1 kg pressure sensor chip, and the threshold values can be set through buttons in the invention, if not, the default T1 is 30, the default T2 is 10 and the default T3 is 70.
The power supply module is a 12V1000mA rechargeable lithium battery and is used for supplying power to the whole system.
The waterproof switch is used for controlling the opening and closing of the whole swim ring system.
The functions of the control module include:
the system comprises a wireless transmission module, a sensing assembly, a positioning device, a wireless transmission module and a control module, wherein the wireless transmission module is used for receiving the air pressure, the pressure and the position information detected by the sensing assembly and the positioning device;
the intelligent swimming ring control system can control the work of the luminous alarm module according to the information and the safety range information transmitted to the intelligent swimming ring control system by the wireless transmission module, and when the distance between the swimming ring and the mobile phone exceeds the safety range, the internal air pressure is too low due to the air leakage of the swimming ring or the pressure is too low due to the separation of the child from the swimming ring, the luminous alarm module is controlled by the control module to flash and alarm;
the air pressure and pressure information detected by the sensing assembly and the electric quantity information of the power supply module can be transmitted to the display adjusting module to be displayed on the LED display screen;
when the user presses the button of the display adjusting module, the button can receive information input by the user, and control the work of the sensing assembly, the positioning device, the luminous alarm module and the wireless transmission module according to the information, wherein the control module is an STM32F104 chip.
The core circuit part comprises a core control module, a positioning device and a wireless transmission module;
the USR-GM3 low-power consumption communication module adopted by the core circuit part comprises a GPS positioning device and a GPRS communication device, the GPS positioning device can carry out serial port communication with an STM32F104 chip after the SIM card is installed, and the positioning device can be used for positioning the position of the swim ring within 1 meter from the mobile phone M according to information sent by the STM32F104 chip or dialing a designated telephone number to carry out alarming and help seeking. The distance value can be set through a button, if not, the default M1 is 200 meters, and when the mobile phone is used, the GPS positioning position of the mobile phone needs to be set first.
The man-machine interaction part comprises a waterproof LED display screen, control keys, a waterproof music player and a waterproof USB interface, wherein the waterproof LED display screen in the man-machine interaction part is used for displaying the residual electric quantity of the power supply module, the air pressure inside each air bag of the swim ring, the sum of the pressure born by the swim ring and the telephone number to be dialed when the swim ring flashes and alarms; the waterproof buttons are up, down, left, right, start, shutdown, confirm, cancel keys and the like, a user can set the working conditions of the sensing component, the positioning device, the luminous alarm module and the wireless transmission module on the display screen through the waterproof buttons, and can input a telephone number dialed when the swim ring flash alarm is carried out through the buttons; the waterproof music player is fixed outside the swim ring, can play music when a child swims to achieve the purpose of entertainment, and can be detached from the swim ring when the waterproof music player is not needed to be used; the waterproof USB interface is positioned outside the swim ring and used for charging the lithium battery of the power supply module, the SIM card slot is also arranged in the waterproof USB interface and used for inserting the SIM card, a parent can see the position of the swim ring on the mobile phone through the SIM card and the positioning device, and the swim ring can send information or dial a designated telephone number through the SIM card when in flashing alarm so as to enable the mobile phone of the parent to vibrate and alarm.
As a further preferable aspect of the invention, the external pressure sensor is attached to the upper surface of the swim ring body through a waterproof film.
As a further preferred aspect of the present invention, the air pressure sensor is located inside the air bags and 1 block is installed inside each air bag.
As a further preferred aspect of the present invention, the antenna part is attached to the outer wall inside the swim ring for GPS positioning and communication.
As a further preferred aspect of the present invention, the core control module is in bidirectional communication with the mobile phone.
As a further preferred aspect of the present invention, the core control module transmits information to the mobile phone through the wireless transmission module, and the security range information set on the mobile phone is transmitted to the core control module through the wireless transmission module.
As a further preferred aspect of the present invention, the light emitting alarm module includes a waterproof LED lamp and a waterproof buzzer;
when the distance between the swim ring and the mobile phone exceeds a safety range, the internal air pressure is too low due to air leakage of the swim ring or the pressure is too low due to separation of children from the swim ring, the waterproof LED lamp flashes to remind nearby people and parents, and the F5 type red, blue and green three-color lamp beads are adopted in the embodiment and circularly flash under the control of the controller;
when the distance between the swim ring and the mobile phone exceeds the safety range, the internal air pressure is too low due to air leakage of the swim ring or the pressure is too low due to the fact that a child is separated from the swim ring, the waterproof buzzer alarms and is used for reminding people nearby and parents, and the SUN-1210DX type waterproof buzzer is adopted in the embodiment.
The invention relates to a safety detection method for an outdoor child swim ring for prompting safety information, which comprises the following specific steps:
the method comprises the following steps that firstly, N pressure sensors on a swim ring are respectively arranged on the upper layer and the lower layer of the outer surface of the swim ring body, each layer is provided with N/2 sensors, a pressure sensor group on the water surface is set as a group A when the swim ring is used, and a pressure sensor group under the water surface is set as a group B;
let the force received by the N/2 sensors of group A at time tn be:
let the force received by the N/2 sensors of group B at time tn be:
step two, calculating an average avgFA of forces received by N/2 sensors of A, B groups at the time tn tn 、avgFB tn The method comprises the following steps:
step three, calculating variance varFA of force applied by N/2 sensors of A, B groups at tn tn 、varFB tn The method comprises the following steps:
step four, selecting varFA tn 、varFB tn Medium size value maxvar, minvar:
maxvar＝max(varFA tn ，varFB tn )；
minvar＝min(varFA tn ，varFB tn )；
wherein symbols max and min represent the process of selecting the maximum and minimum values;
step five, calculating a variance ratio Pvar:
step six, judging the state
Setting a threshold Tvar;
if Pvar is larger than Tvar, the swimming ring is determined to float on one side, the swimming ring is in a transverse posture, and according to the surface corresponding to maxvar, the surface A and the surface B are determined to be on the upper side, and the other surface is under the lower side;
if Pvar < = Tvar, then it is determined to be forward stroke, the swim ring is in longitudinal position, and the maximum force at this time for all N sensors is calculated:
step seven, if the swimming ring floats on one side, calculating the sum total FC of the stress of all sensors on the surface under the water surface when the swimming ring is in a transverse posture tn ；
Then, the value is taken as a vertical stress value F of the swim ring at the moment tn For further judging the status of the user;
if the swimming life is in a forward swimming life, when the swimming life is in a longitudinal swimming life, the data of the sensor at the moment is the transverse pressure of the water pressure, the transverse pressure is related to the depth of the sensor under the water, and the depth of the sensor under the water is also vertical to the swimming life by the stress value F in the vertical direction tn Is a linear relationship, then F is derived using the results of step 6 tn ：
F tn ＝Coh*maxF tn +Cob；
Wherein Coh and Cob are constants that are related to the material and radius of the swim ring, and need to be tested at different F's in the laboratory after the swim ring material and radius are determined tn And maxF tn The relation between Coh and Cob are then calculated by a linear fitting method;
step eight, judging abnormality
Total FC in either the landscape state tn And F in the longitudinal state tn The buoyancy of water to the swim ring under the condition of users with different weights is reflected, and before the use, the force under the normal state is set under the condition that the safety condition is confirmed by a guardian, so that when the swim ring is used, the buoyancy is not excessively changed under the condition of judging whether the swim ring is transverse or longitudinal;
if the loss is too large, the user is separated from the swim ring, and the danger can be judged to occur, and the alarm is needed;
if the number of the swimming ring is excessively large, the situation that an excessively heavy object is pressed on the swimming ring or the swimming ring loses buoyancy and falls in water is indicated, and the dangerous situation also needs to be alarmed;
thus, when in use, under the condition that the guardian confirms the safety, the swim ring of the child in the normal state and the total FC in the transverse state are firstly carried out tn And F in the longitudinal state tn Setting to obtain a standard value different from person to person, and in a transverse state, total FC tn Normal and F in longitudinal state tn _normal；
Then setting an upper threshold ratio Td_up, a lower threshold ratio Td_down, and a time threshold T_danger;
when in use, the device continuously detects whether the device is in a transverse state or a longitudinal state;
if the state is the transverse state, then continuing to judge the current total FC tn And Total FC of the setting tn Normal difference from totalFC tn Normal ratio, if the variation upper threshold ratio td_up and lower threshold ratio td_down are exceeded and the time is equal to or greater than the time threshold t_danger, then an alarm is given;
if the current F is in the longitudinal state, then the current F is continuously judged tn And F is set up tn Difference of normal, and F tn Normal ratio, if the variation upper threshold ratio td_up and lower threshold ratio td_down are exceeded and the time is equal to or greater than the time threshold t_danger, then an alarm is given;
when the distance between the swim ring and the mobile phone exceeds a safety range and the time is greater than or equal to a time threshold T_danger, the alarm is also given, and the method is to compare the information of the positioning device of the swim ring with the positioning information of the mobile phone of the guardian.
The beneficial effects are that: compared with the prior art, the outdoor child swim ring capable of prompting safety information and the safety detection method thereof have the following advantages:
1. a plurality of air bags are arranged in the swim ring, and after one air bag leaks air, other air bags can ensure the whole work;
2. the control module arranged in the swim ring can transmit the information of the position, the air pressure and the like of the swim ring to the mobile phone of a parent, so that the parent can observe the condition of the swim ring in real time;
3. the light-emitting alarm module is additionally arranged in the swim ring, so that when the swim ring leaks air, the child breaks away from the swim ring or the swim ring is too far away from the mobile phone, the swim ring can automatically emit sound and flash, and meanwhile, the mobile phone of a parent can also vibrate to give an alarm, so that the child can timely remind the parent when the child encounters danger in swimming, and the occurrence of a drowning event is avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a full cross-sectional view of the present invention;
FIG. 3 is a block diagram of the circuit structure of the present invention;
fig. 4 is a software flow chart of the present invention.
Detailed Description
The invention is further elucidated below in connection with the drawings and the specific embodiments.
As shown in the accompanying drawings, the outdoor child swim ring for prompting safety information according to the present invention comprises: the swimming ring comprises a pressure sensor 1, a pneumatic sensor 2, a waterproof LED lamp 3, a power module 4, a waterproof buzzer 5, a core circuit part 6, a man-machine interaction part 7, an antenna part 8, a waterproof switch 9 and a swimming ring body 10.
The swim ring body 10 is internally provided with a plurality of air bags, a pressure sensor 1, a waterproof buzzer 5 of a waterproof LED lamp 3 and a waterproof switch 9 are arranged on the outer surface of the swim ring body 10, and an air pressure sensor 2, a power supply module 4 and a control module; the core circuit portion 6, the man-machine interaction portion 7 and the antenna portion 8 are located inside the swim ring body 10.
The invention relates to a principle of a safety detection method of an outdoor child swim ring for prompting safety information, which comprises the following steps:
the pressure sensors 1 are respectively arranged on the upper layer and the lower layer of the outer surface of the swim ring body 10, each layer is provided with N/2 sensors, the group of the pressure sensors 1 on the water surface is set as a group A when in use, and the group of the pressure sensors 1 under the water surface is set as a group B;
the first task of the multi-sensor data fusion algorithm is to distinguish between gestures:
z1: what is under water when the swim ring is in a lateral position when one side floats?
Z2: when the swim ring is in a longitudinal posture during the forward swimming, which side is under water?
The second task is to perform data fusion based on completion of the first task,
the principle of the first task is that the pressure sensor is a point sensor, the force obtained by the pressure sensor group on the water surface is unevenly stressed, and one or 2 arms or 4 limbs possibly are put on the sensor point, so that the difference is large; the pressure sensor group under the water surface is influenced by the overall pressure of the water body, so that the pressure sensor group is relatively uniformly stressed, and the working principle of the first task is to adopt a variance comparison method.
Examples
The method comprises the following steps that firstly, N pressure sensors (1) on a swim ring are respectively arranged on the upper layer and the lower layer of the outer surface of the swim ring body (1), N/2 sensors are respectively arranged on each layer, the pressure sensors (1) on the water surface are set as A groups, and the pressure sensors (1) under the water surface are set as B groups when in use;
let the force received by the N/2 sensors of group A at time tn be:
let the force received by the N/2 sensors of group B at time tn be:
step two, calculating an average avgFA of forces received by N/2 sensors of A, B groups at the time tn tn 、avgFB tn The method comprises the following steps:
step three, calculating variance varFA of force applied by N/2 sensors of A, B groups at tn tn 、varFB tn The method comprises the following steps:
step four, selecting varFA tn 、varFB tn Medium size value maxvar, minvar:
maxvar＝max(varFA tn ，varFB tn )；
minvar＝min(varFA tn ，varFB tn )；
wherein symbols max and min represent the process of selecting the maximum and minimum values;
step five, calculating a variance ratio Pvar:
step six, judging the state
Setting a threshold Tvar;
if Pvar is larger than Tvar, the swimming ring is determined to float on one side, the swimming ring is in a transverse posture, and according to the surface corresponding to maxvar, the surface A and the surface B are determined to be on the upper side, and the other surface is under the lower side;
if Pvar < = Tvar, then it is determined to be forward stroke, the swim ring is in longitudinal position, and the maximum force at this time for all N sensors is calculated:
step seven, if the swimming ring floats on one side, calculating the sum total FC of the stress of all sensors on the surface under the water surface when the swimming ring is in a transverse posture tn ；
Then, the value is taken as a vertical stress value F of the swim ring at the moment tn For further judging the status of the user;
if the swimming life is in a forward swimming life, when the swimming life is in a longitudinal swimming life, the data of the sensor at the moment is the transverse pressure of the water pressure, the transverse pressure is related to the depth of the sensor under the water, and the depth of the sensor under the water is also vertical to the swimming life by the stress value F in the vertical direction tn Is a linear relationship, then F is derived using the results of step 6 tn ：
F tn ＝Coh*maxF tn +Cob；
Where Cah and Cob are constants that are related to the material, radius of the swim ring, and need to be tested in the laboratory after the swim ring material, radius are determined, by testing continuously at different locationsF tn And maxF tn The relation between Coh and Cob are then calculated by a linear fitting method;
n=20, i.e. 20 external pressure sensors; tvar=2; coh and Cob are constants which relate to the material and diameter of the swim ring, in this example the swim ring material is plastic with a thickness of 1mm, the swim ring balloon diameter is 30cm, the swim ring overall diameter is 90cm, at which point Coh =63, cob= -11;
step eight, judging abnormality
Total FC in either the landscape state tn And F in the longitudinal state tn The buoyancy of water to the swim ring under the condition of users with different weights is reflected, and before the use, the force under the normal state is set under the condition that the safety condition is confirmed by a guardian, so that when the swim ring is used, the buoyancy is not excessively changed under the condition of judging whether the swim ring is transverse or longitudinal;
if the loss is too large, the user is separated from the swim ring, and the danger can be judged to occur, and the alarm is needed;
if the number of the swimming ring is excessively large, the situation that an excessively heavy object is pressed on the swimming ring or the swimming ring loses buoyancy and falls in water is indicated, and the dangerous situation also needs to be alarmed;
thus, when in use, under the condition that the guardian confirms the safety, the swim ring of the child in the normal state and the total FC in the transverse state are firstly carried out tn And F in the longitudinal state tn Setting to obtain a standard value different from person to person, and in a transverse state, total FC tn Normal and F in longitudinal state tn _normal；
Then setting an upper threshold ratio Td_up, a lower threshold ratio Td_down, and a time threshold T_danger;
when in use, the device continuously detects whether the device is in a transverse state or a longitudinal state;
if the state is the transverse state, then continuing to judge the current total FC tn And Total FC of the setting tn _norma l Is different from total FC tn Normal ratio, if the upper threshold ratio td_up and the lower threshold are varied to be exceededProportion Td_Down, and time is greater than or equal to time threshold T_danger, then alarm;
if the current F is in the longitudinal state, then the current F is continuously judged tn And F is set up tn Difference of normal, and F tn Normal ratio, if the variation upper threshold ratio td_up and lower threshold ratio td_down are exceeded and the time is equal to or greater than the time threshold t_danger, then an alarm is given;
when the distance between the swim ring and the mobile phone exceeds a safety range and the time is greater than or equal to a time threshold T_danger, the alarm is also given, and the method is to compare the information of the positioning device of the swim ring with the positioning information of the mobile phone of the guardian.
The foregoing embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, not to limit the scope of the present invention. All changes and modifications that come within the meaning and range of equivalency of the invention are to be embraced within their scope.
Claims (8)
1. A safety monitoring method of outdoor child swim ring for prompting safety information is characterized in that,
the outdoor child swim ring for prompting safety information comprises: the swim ring comprises a swim ring body (10), pressure sensors (1) uniformly distributed on the upper surface of the outer part of the swim ring body (10), a luminous alarm module and a waterproof switch (9) which are arranged on the outer part of the swim ring body (10), and a gas pressure sensor (2), a power supply module (4) and a control module which are positioned in the swim ring body (10); a plurality of air bags are arranged in the swim ring body (10);
the control module is connected with the pressure sensor (1), the air pressure sensor (2), the luminous alarm module and the power module (4), and comprises a core circuit part (6), a man-machine interaction part (7) and an antenna part (8);
the core circuit part (6) comprises a core control module, a positioning device and a wireless transmission module;
the man-machine interaction part (7) comprises a waterproof LED display screen, control keys, a waterproof music player and a waterproof USB interface;
the safety monitoring method comprises the following specific steps:
the method comprises the following steps that firstly, N pressure sensors (1) on a swim ring are respectively arranged on the upper layer and the lower layer of the outer surface of a swim ring body (10), each layer is provided with N/2 sensors, when the swim ring is used, the group of the pressure sensors (1) on the water surface is set as a group A, and the group of the pressure sensors (1) under the water surface is set as a group B;
let the force received by the N/2 sensors of group A at time tn be:
let the force received by the N/2 sensors of group B at time tn be:
step two, calculating an average avgFA of forces received by N/2 sensors of A, B groups at the time tn tn 、avgFB tn The method comprises the following steps:
step three, calculating the variance varF A of the force applied by the N/2 sensors of the A, B group at the tn moment tn 、varF B tn The method comprises the following steps:
step four, selecting varFA tn 、varFB tn Medium size value maxvar, minvar:
maxvar＝max(varFA tn ，varFB tn )；
minvar＝min(varFA tn ，varFB tn )；
wherein symbols max and min represent the process of selecting the maximum and minimum values;
step five, calculating a variance ratio Pvar:
step six, judging the state
Setting a threshold Tvar;
if Pvar > Tvar, judging that the single face floats, the swim ring is in a transverse posture, and judging which face of A and B is on the upper face and the other face is under according to the face corresponding to maxvar;
if Pvar < = Tvar, then it is determined to be forward stroke, the swim ring is in a longitudinal position, and the maximum force at this time for all N sensors is calculated:
step seven, if the swimming ring floats on one side, calculating the sum total FC of the stress of all sensors on the surface under the water surface when the swimming ring is in a transverse posture tn ；
Then, the value is taken as a vertical stress value F of the swim ring at the moment tn For further judging the status of the user;
if the swimming life is in a forward swimming life, when the swimming life is in a longitudinal swimming life, the data of the sensor at the moment is the transverse pressure of the water pressure, the transverse pressure is related to the depth of the sensor under water, and the sensor is under waterForce value F in the direction perpendicular to the swim ring at the lower depth tn Is a linear relationship, then F is obtained by using the result of step six tn ：
F tn ＝Coh*maxF tn +Cob；
Wherein Coh and Cob are constants that are related to the material and radius of the swim ring, and need to be tested at different F's in the laboratory after the swim ring material and radius are determined tn And maxF tn The relation between Coh and Cob are then calculated by a linear fitting method;
step eight, judging abnormality
Total FC in either the landscape state tn And F in the longitudinal state tn The buoyancy of water to the swim ring under the condition of users with different weights is reflected, and before the use, the force under the normal state is set under the condition that the safety condition is confirmed by a guardian, so that when the swim ring is used, the buoyancy is not excessively changed under the condition of judging whether the swim ring is transverse or longitudinal;
if the loss is too large, the user is separated from the swim ring, and the danger can be judged to occur, and the alarm is needed;
if the number of the swimming ring is excessively large, the situation that an excessively heavy object is pressed on the swimming ring or the swimming ring loses buoyancy and falls in water is indicated, and the dangerous situation also needs to be alarmed;
thus, when in use, under the condition that the guardian confirms the safety, the swim ring of the child in the normal state and the total FC in the transverse state are firstly carried out tn And F in the longitudinal state tn Setting to obtain a standard value different from person to person, and in a transverse state, total FC tn Normal and F in longitudinal state tn _normal；
Then setting an upper threshold ratio τd_up, a lower threshold ratio Td_down and a time threshold T_danger;
when in use, the device continuously detects whether the device is in a transverse state or a longitudinal state;
if the state is the transverse state, then continuing to judge the current total FC tn And Total FC of the setting tn Normal difference from totalFC tn Normal ratio, if the variation upper threshold ratio td_up and lower threshold ratio td_down are exceeded and the time is equal to or greater than the time threshold t_danger, then an alarm is given;
if the current F is in the longitudinal state, then the current F is continuously judged tn And F is set up tn Difference of normal, and F tn Normal ratio, if the variation upper threshold ratio td_up and lower threshold ratio td_down are exceeded and the time is equal to or greater than the time threshold t_danger, then an alarm is given;
when the distance between the swim ring and the mobile phone exceeds a safety range and the time is greater than or equal to a time threshold T_danger, the alarm is also given, and the method is to compare the information of the positioning device of the swim ring with the positioning information of the mobile phone of the guardian.
2. The safety monitoring method according to claim 1, wherein: the external pressure sensor (1) is attached to the upper surface of the swim ring body (10) through a waterproof film.
3. The safety monitoring method according to claim 1, wherein: the man-machine interaction part (7) is provided with a clamping groove for inserting the SIM card.
4. The safety monitoring method according to claim 1, wherein: the air pressure sensor (2) is positioned in the air bags, and 1 block is installed in each air bag.
5. The safety monitoring method according to claim 1, wherein: the antenna part (8) is attached to the outer wall of the inner side of the swim ring.
6. The safety monitoring method according to claim 1, wherein: the core control module is in bidirectional communication with the mobile phone.
7. The safety monitoring method according to claim 6, wherein: the core control module transmits information to the mobile phone through the wireless transmission module, and the safety range information set on the mobile phone is transmitted to the core control module through the wireless transmission module.
8. The safety monitoring method according to claim 1, wherein: the luminous alarm module comprises a waterproof LED lamp (3) and a waterproof buzzer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910368014.1A CN109941407B (en) | 2019-05-05 | 2019-05-05 | Outdoor child swim ring capable of prompting safety information and safety detection method thereof |
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| CN110371273A (en) * | 2019-07-15 | 2019-10-25 | 湖南文理学院 | A kind of swimming equipment |
| IE87511B1 (en) * | 2020-01-02 | 2024-07-03 | Fitzpatrick David | Water rescue equipment for the blind and deaf |
| CN111341070B (en) * | 2020-03-02 | 2022-04-01 | 青岛联合创智科技有限公司 | Drowning detection method and label based on gyroscope and water depth sensor |
| CN111359171B (en) * | 2020-03-17 | 2021-07-13 | 杭州炘诺科技有限公司 | Drowning-prevention swimming reminding glasses and reminding method thereof |
| CN111632356B (en) * | 2020-06-19 | 2021-06-01 | 景德镇学院 | Intelligent swimming partner |
| CN113689638A (en) * | 2021-08-06 | 2021-11-23 | 盐城师范学院 | Safe and intelligent swim ring and alarm method |
| CN113762215B (en) * | 2021-10-12 | 2022-04-15 | 江阴市人人达科技有限公司 | Real-time judgment system for object surrounding environment |
| CN114435562A (en) * | 2022-02-21 | 2022-05-06 | 桑学森 | Swim ring with active warning function (lifebuoy) |
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