CN112274147A - Swimming pool life-saving system and method based on smart bracelet - Google Patents
Swimming pool life-saving system and method based on smart bracelet Download PDFInfo
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- CN112274147A CN112274147A CN202011098127.3A CN202011098127A CN112274147A CN 112274147 A CN112274147 A CN 112274147A CN 202011098127 A CN202011098127 A CN 202011098127A CN 112274147 A CN112274147 A CN 112274147A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/681—Wristwatch-type devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/746—Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C9/00—Life-saving in water
- B63C9/08—Life-buoys, e.g. rings; Life-belts, jackets, suits, or the like
- B63C9/13—Life-buoys, e.g. rings; Life-belts, jackets, suits, or the like attachable to body member, e.g. arm, neck, head or waist
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
- G01S5/183—Emergency, distress or locator beacons
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
- G01S5/20—Position of source determined by a plurality of spaced direction-finders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C9/00—Life-saving in water
- B63C9/08—Life-buoys, e.g. rings; Life-belts, jackets, suits, or the like
- B63C9/13—Life-buoys, e.g. rings; Life-belts, jackets, suits, or the like attachable to body member, e.g. arm, neck, head or waist
- B63C2009/131—Life-buoys, e.g. rings; Life-belts, jackets, suits, or the like attachable to body member, e.g. arm, neck, head or waist specially adapted for being attachable to a single arm or wrist
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Abstract
The invention relates to a swimming pool lifesaving system and a swimming pool lifesaving method based on an intelligent bracelet, which comprises a hydrophone array, the intelligent bracelet, an indicating system and a control computer, wherein the hydrophone array consists of a series of underwater microphones with fixed positions and corresponding calibration microphones, the intelligent bracelet internally comprises a microcontroller, an ultrasonic loudspeaker and an oximeter, the indicating system comprises a holder and a light source system, the control computer combines other three subsystems into an organic whole, a coordinate system is established for a swimming pool according to the known positions of the microphones, the time difference of ultrasonic signals received by the microphones is recorded according to the computer, an equation set can be listed by using the propagation speed of sound waves in water, and the distance from the microphone to a sound source is calculated. According to the principle of triangulation location, the position of the sound source in the coordinate system of the swimming pool can be accurately calculated, and after the coordinates are calculated, the computer is controlled to converge the light to the sound source, namely the position of a drowning person, so that the drowning person can conveniently rescue nearby persons.
Description
Technical Field
The invention relates to the field of swimming pool lifesaving, in particular to a swimming pool lifesaving system and method based on an intelligent bracelet.
Background
Swimming is a sports exercise mode which is popular among people, and can relax the body and mind, reduce muscle pressure, burn fat and control blood pressure. At present, all swimming pools are required to be provided with lifeguards and related lifesaving equipment, but in recent years, drowning accidents frequently occur in normal swimming pools, adults are drowned, more children with limited experience and insufficient body control capacity are used, most of the drowning accidents occur in swimming pools with dense crowds, because the population density is high, the drowning accidents cannot be found in time, if a device capable of finding and positioning the drowning person is provided, after the drowning accident occurs, nearby people need to be timely informed to rescue the drowning person, the repeated occurrence of tragedies can be well avoided, according to the open conditions and technical requirements (swimming places) of the sports places issued by the national sports bureau, artificial swimming pools with the water surface area below 250 square meters are provided with at least 2 fixed overwater lifeguards: the water surface area is more than 250 square meters, and the survival workers on water are equipped and fixed according to the proportion that every square meter is increased by 1 person within 250 square meters.
Even if there is the rescuer on water, the emergence of drowned accident is still frequent emergence to there are many drowned accidents in addition because drowned person does not have the performance of seeking help in aqueous, and the mistake is saved the chance, and this intangibly increased many psychological pressure to the work of rescuer, if can forecast the drowned accident, then can alleviate the rescuer work, improve the efficiency of saving the accident.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a swimming pool life-saving system based on an intelligent bracelet.
In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:
the swimming pool life-saving system based on the intelligent bracelet comprises a hydrophone array, the intelligent bracelet, an indication system and a control computer;
the hydrophone array consists of a series of underwater microphones with fixed positions and corresponding calibration microphones;
the intelligent bracelet internally comprises a microcontroller, an ultrasonic speaker and an oximeter;
the display system comprises a holder and a light source system;
the control computer combines the other three subsystems into an organic whole.
Preferably, the hydrophone array is composed of an underwater microphone, an underwater microphone amplifier, a band-pass filter and an AD converter, wherein the microphone outputs a weak voltage signal after receiving ultrasonic waves, the weak voltage signal enters a preamplifier to be amplified, then the weak voltage signal is sent to the band-pass filter to filter various signals except the ultrasonic waves, so that an analog audio signal is obtained, the AD converter receives an audio clock sent by the control system, and simultaneously the AD converter converts the analog audio signal into a digital audio signal which can be processed by a computer.
Preferably, the intelligent bracelet internally comprises a battery, a singlechip, a DA converter, a power amplifier, piezoelectric ceramics and a blood oxygen saturation sensor, infrared light emitted by the blood oxygen saturation sensor can penetrate through the skin, oxyhemoglobin and non-oxyhemoglobin have different absorptivities to incident light with different wavelengths, according to the absorption rate, the blood oxygen saturation sensor can measure the blood oxygen saturation of the human body, then the signal is converted into a digital signal and sent to the singlechip, the singlechip judges whether the blood oxygen is in a normal range according to the parameters stored in the singlechip, if the ultrasonic signals are not in the normal range, the ultrasonic signals stored in the internal memory are output, converted into analog audio signals through the DA converter, and amplified through the power amplifier circuit, so that the piezoelectric ceramics can be pushed to emit ultrasonic waves.
Preferably, the indicating system comprises a light-gathering light source, a three-freedom-degree holder and a three-freedom-degree holder, and comprises a base part, a holder rotating part and a swinging part, wherein the base part is used as a support of the whole machine body, and the holder rotating part mainly takes the holder machine body as a main body and is connected with the base part; the swing part is respectively connected with the rotating part of the holder, the rotating part and the swing part complete the rotating work by the steering engine, the rotating part of the holder is connected with a spotlight source, the irradiation angle of the spotlight lamp can be freely adjusted according to a control signal, and the telescopic device is used for marking drowners.
Preferably, the control computer is composed of an x86 computer provided with a multi-channel ultrasonic audio interface, the ultrasonic audio interface can provide an audio clock and receive digital audio signals, the audio interface receives the digital audio signals and transmits audio data to the computer for analysis through a USB interface, a control program for realizing writing runs in the computer, the received data are calculated, the position of a drowning person is judged, and meanwhile, the computer sends a control signal to the indicating system to mark the position of the drowning person.
Swimming pool lifesaving method based on intelligent bracelet, its characterized in that:
step S1, the hand plate used for charging in the swimming pool is changed into an intelligent bracelet, the intelligent bracelet needs to be correctly worn before the swimming pool goes into the water,
once the microcontroller in the bracelet detects that the oxygen saturation level of the blood of the wearer has fallen to a dangerous value, step S2.
In step S3, a coordinate system is established for the pool from the known microphone locations.
Preferably, the step S1: the microcontroller inside the intelligent bracelet can measure the oxyhemoglobin saturation of the wearer according to certain time intervals, and when drowning accidents occur, the oxyhemoglobin saturation of the wearer can descend, so that whether the drowning accidents occur can be determined.
Preferably, the step S2: the ultrasonic microphone on the bracelet can be opened to the system, a series of ultrasonic pulses are sent out, and a hydrophone array is arranged in the swimming pool and can receive ultrasonic signals.
Preferably, the step S3: according to the time difference of the ultrasonic wave signals received by the plurality of microphones recorded by the computer, an equation set can be listed by utilizing the transmission speed of the underwater sound wave, and the distance from the microphone to the sound source is calculated. And then, according to the principle of triangulation, the position of the sound source in the coordinate system of the swimming pool can be accurately calculated.
Has the advantages that:
1. the fixed inserted bar is inserted into the insertion holes in the lock rings, each group of fixed inserted bars is inserted and fixed with three groups of lock rings, the top of the fixed block is uniformly provided with a connecting groove, the bottom of the fixed block is fixedly provided with a clamping block corresponding to the connecting groove, and the connecting groove at the bottom of the fixed block and the clamping block at the top of the fixed block are clamped in a sliding mode.
2. The right end of the fixed insertion rod is respectively inserted into the sliding hole and the abutting groove, the rotating handle is rotated, the rotating handle drives the fastening screw to rotate, the fastening screw drives the lifting pressing plate to move up and down, the lifting sliding block is sleeved on the fixed sliding rod in a sliding mode, the lifting pressing plate is fixed on the left side of the lifting sliding block, the lifting pressing plate drives the abutting rod to move up and down, the abutting rod is adjusted to be abutted and fastened with the fixed insertion rod, the fixed insertion rod is prevented from being loosened during installation, after the installation is finished, the opening state needs to be adjusted, a key matched with the key insertion groove needs to be inserted into the key insertion groove firstly, the key rotates rightwards, at the moment, the switch is located in the opening state, the ground switch is locked in the opening state, at the moment, the closing indicator lamp is lightened, and.
Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used for describing the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a basic schematic diagram of the system of the present invention;
FIG. 2 is a schematic diagram of a hydrophone array of the present invention;
FIG. 3 is a schematic diagram of the smart band of the present invention;
FIG. 4 is a diagram of the present invention positioning math;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the swimming pool life-saving system based on the intelligent bracelet comprises a hydrophone array, the intelligent bracelet, an indication system and a control computer;
the hydrophone array consists of a series of underwater microphones with fixed positions and corresponding calibration microphones;
the intelligent bracelet internally comprises a microcontroller, an ultrasonic speaker and an oximeter;
the display system comprises a holder and a light source system;
the control computer combines the other three subsystems into an organic whole.
Wherein, the hydrophone array is composed of an underwater microphone, an underwater microphone amplifier, a band-pass filter and an AD converter, the microphone outputs weak voltage signals after receiving ultrasonic waves, the weak voltage signals enter a preamplifier for amplification and then are sent to a band-pass filter for filtering various signals except the ultrasonic waves, so that analog audio signals are obtained, the AD converter receives an audio clock sent by a control system, simultaneously the AD converter converts the analog audio signals into digital audio signals capable of being processed by a computer, a battery, a singlechip, a DA converter, a power amplifier, piezoelectric ceramics and a blood oxygen saturation sensor are arranged in the intelligent bracelet, infrared light sent by the blood oxygen saturation sensor can penetrate through the skin, oxyhemoglobin and non-oxyhemoglobin have different absorptivity for incident light with different wavelengths, and according to the absorptivity, the oxyhemoglobin saturation sensor can measure the oxyhemoglobin saturation of a human body, then the signal is converted into a digital signal to be sent to the single chip microcomputer, the single chip microcomputer judges whether the blood oxygen is in a normal range according to parameters stored inside, if the blood oxygen is not in the normal range, an ultrasonic signal stored in an internal storage is output and realized, the ultrasonic signal is converted into an analog audio signal through the DA converter, and the analog audio signal is amplified through the power amplifier circuit to push the piezoelectric ceramic to send out ultrasonic waves.
One specific application of this embodiment is: change the hand tablet that the swimming pool was used for charging into intelligent bracelet, all need take intelligent bracelet well correctly before launching, the inside microcontroller of intelligent bracelet can measure the oxyhemoglobin saturation of person of wearing according to certain time interval, when drowning the occurence of failure, person's oxyhemoglobin saturation can descend, whether this time can confirm drowned accident has taken place, in case little the control in bracelet has detected person's oxyhemoglobin saturation and has fallen to dangerous value, the ultrasonic microphone on the bracelet will be opened to the system, send a series of ultrasonic pulse, establish hydrophone array in the swimming pool, can accept ultrasonic signal.
Example 2:
the swimming pool life-saving system based on the intelligent bracelet comprises a hydrophone array, the intelligent bracelet, an indication system and a control computer;
the hydrophone array consists of a series of underwater microphones with fixed positions and corresponding calibration microphones;
the intelligent bracelet internally comprises a microcontroller, an ultrasonic speaker and an oximeter;
the display system comprises a holder and a light source system;
the control computer combines the other three subsystems into an organic whole.
Wherein, the hydrophone array is composed of an underwater microphone, an underwater microphone amplifier, a band-pass filter and an AD converter, the microphone outputs weak voltage signals after receiving ultrasonic waves, the weak voltage signals enter a preamplifier for amplification and then are sent to a band-pass filter for filtering various signals except the ultrasonic waves, so that analog audio signals are obtained, the AD converter receives an audio clock sent by a control system, simultaneously the AD converter converts the analog audio signals into digital audio signals capable of being processed by a computer, a battery, a singlechip, a DA converter, a power amplifier, piezoelectric ceramics and a blood oxygen saturation sensor are arranged in the intelligent bracelet, infrared light sent by the blood oxygen saturation sensor can penetrate through the skin, oxyhemoglobin and non-oxyhemoglobin have different absorptivity for incident light with different wavelengths, and according to the absorptivity, the indicating system comprises a light gathering light source, a three-freedom-degree tripod head and a three-freedom-degree tripod head, wherein the three-freedom-degree tripod head comprises a base part, a tripod head rotating part and a swinging part, the base part is used as a support of the whole machine body, and the tripod head rotating part mainly takes a tripod head machine body as a main body and is connected with the base part; the control computer is composed of an x86 computer provided with a multi-channel ultrasonic audio interface, the ultrasonic audio interface can provide an audio clock, receive digital audio signals, the audio interface receives the digital audio signals and transmits the audio data to the computer through a USB interface for analysis, the computer runs a control program for realizing compiling, calculates the received data, judges the position of a drowner, and simultaneously sends out a control signal to an indicating system by the computer to mark the position of the drowner.
The positioning principle of the embodiment is as follows: in mathematics, for a point (sound source) in three-dimensional space, we usually use the point P (x, y, z) to represent it, and assuming a known position P1 in the space, where an acoustic sensor is pre-installed, its coordinates can be represented by (x1, y1, z1), and assuming that the length of the segment PP1 (i.e. the distance from the sound source to the sensor) is R, the basic geometrical relationship is:
obviously, we need more known conditions if we have to solve a unique solution for point P (x, y, z). From mathematical geometry knowledge we can see that the distance R can be derived from the speed of sound (in water) x the sound travel time, in addition to the geometrical relationship. However, in general, only the time when a sound reaches a sensor can be known, but it is difficult to measure the time when the sound is played from a sound generating device, so that the propagation time from a sound source to any one of the sound sensors cannot be measured until the positioning is completed.
Since we can measure the specific time when the sound reaches a certain sensor, we can get the time difference when the sound reaches each sensor. One sensor is added to each of three different points P2, P3 and P4 in space, with respect to the sensor at the point P1. For sensor number i, if we note the difference in the arrival times of the sound waves at sensor number 1 and sensor number i, then the distance from sensor number i to the sound source pair should be. Where c is the speed of sound in water.
Obviously, for these four sensors, we can write the following set of equations:
(x-x2)2+(y-y2)2+(z-z2)2＝(R1+τ21c)2
(x-x3)2+(y-y3)2+(z-z3)2＝(R1+τ31c)2
(x-x4)2+(y-y4)2+(z-z4)2＝(R1+τ41C)2
after finishing, the following can be obtained:
derived from linear algebraic theory: if the coefficient determinant is not 0, then the point P (x, y, z) can get a unique solution.
As long as the four sensors are not in the same plane in the three-dimensional space, the coefficient determinant is guaranteed to be not 0.
The speed of sound c in water can be derived from the empirical formula [ 1 ] in the literature:
c(T，S，z)＝a1+a2T+a3T2+a4T3+a5(S-35)+a6z+a7z2+a8T(S -35)+a9Tz3
wherein: t is the temperature of water, in units: c, centigrade degree; s is the salinity unit of water: one in a thousand; z is the water depth here, in units: rice; a is1＝1448.96，a2＝4.591，a3＝-5.304× 10-2，a4＝2.374×10-4，a5＝1.340，a6＝1.630×10-2，a7＝1.675×10-7， a8＝-1.025×10-2，a9＝-7.139×10-13。
Example 3: the hand plate for charging the swimming pool is changed into an intelligent hand ring, the intelligent hand ring is required to be correctly worn before the swimming pool is submerged, once the micro-control in the hand ring detects that the blood oxygen saturation of a wearer is reduced to a dangerous value, a coordinate system is established for the swimming pool by the known position of a microphone, the micro-controller in the intelligent hand ring can measure the blood oxygen saturation of the wearer according to a certain time interval, when a drowning accident occurs, the blood oxygen saturation of the wearer is reduced, whether the drowning accident occurs or not can be determined, the system can open an ultrasonic microphone on the hand ring to send a series of ultrasonic pulses, a hydrophone array is arranged in the swimming pool and can receive ultrasonic signals, an equation set can be listed by utilizing the transmission speed of the sound waves in the water according to the time difference that a computer records that the ultrasonic signals are received by a plurality of microphones, the distance of the microphone to the sound source is calculated. And then, according to the triangulation positioning principle, the position of the sound source in the coordinate system of the swimming pool can be accurately calculated.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Rather, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments have not been described in detail to avoid obscuring the disclosure to the specific embodiments described, and it is to be understood that many modifications and variations are possible in light of the teaching of this specification. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. Swimming pool lifesaving system based on intelligence bracelet, its characterized in that: the intelligent hand ring is characterized by comprising a hydrophone array, an intelligent hand ring, an indicating system and a control computer;
the hydrophone array consists of a series of underwater microphones with fixed positions and corresponding calibration microphones;
the intelligent bracelet internally comprises a microcontroller, an ultrasonic speaker and an oximeter;
the display system comprises a holder and a light source system;
the control computer combines the other three subsystems into an organic whole.
2. The swimming pool life-saving system based on intelligence bracelet of claim 1, characterized in that: the hydrophone array is composed of an underwater microphone, an underwater microphone amplifier, a band-pass filter and an AD converter, wherein the microphone outputs weak voltage signals after receiving ultrasonic waves, the weak voltage signals enter a preamplifier to be amplified and then are sent to the band-pass filter to filter various signals except the ultrasonic waves, so that analog audio signals are obtained, the AD converter receives an audio clock sent by a control system, and meanwhile, the AD converter converts the analog audio signals into digital audio signals capable of being processed by a computer.
3. The swimming pool life-saving system based on intelligence bracelet of claim 1, characterized in that: the inside battery that contains of intelligence bracelet, singlechip, DA converter, power amplifier, piezoceramics, oxyhemoglobin degree sensor, the infrared light that oxyhemoglobin degree sensor sent can pierce through skin, and oxyhemoglobin and non-oxyhemoglobin have different absorptions to different wavelength incident lights, according to this absorptance, oxyhemoglobin degree sensor just can measure human oxyhemoglobin degree, converts this signal into digital signal again and sends the singlechip into, the singlechip judges whether the blood oxygen is in normal scope according to the parameter of inside storage, if not in normal scope, the ultrasonic signal of storage in inside memory is realized in the output, ultrasonic signal converts analog audio signal into through DA converter, enlargies through power amplifier circuit again, just can promote piezoceramics to send the ultrasonic wave.
4. The swimming pool life-saving system based on intelligence bracelet of claim 1, characterized in that: the indicating system comprises a light-gathering light source, a three-degree-of-freedom cradle head and a three-degree-of-freedom cradle head, and comprises a base part, a cradle head rotating part and a swinging part, wherein the base part is used as a support of the whole body, and the cradle head rotating part mainly takes the cradle head body as a main body and is connected with the base part; the swing part is respectively connected with the rotating part of the holder, the rotating part and the swing part complete the rotating work by the steering engine, the rotating part of the holder is connected with a spotlight source, the irradiation angle of the spotlight lamp can be freely adjusted according to a control signal, and the telescopic device is used for marking drowners.
5. The swimming pool life-saving system based on intelligence bracelet of claim 1, characterized in that: the control computer is composed of an x86 computer provided with a multi-channel ultrasonic audio interface, the ultrasonic audio interface can provide an audio clock and receive digital audio signals, the audio interface receives the digital audio signals and transmits audio data to the computer for analysis through a USB interface, a control program which is written is operated inside the computer, the received data is calculated, the position of a drowning person is judged, and meanwhile, the computer sends a control signal to an indicating system to mark the position of the drowning person.
6. Swimming pool lifesaving method based on intelligent bracelet, its characterized in that:
step S1, changing the hand plate used for charging in the swimming pool into an intelligent bracelet, wherein the intelligent bracelet needs to be correctly worn before water is discharged;
step S2, once the micro-control in the bracelet detects that the blood oxygen saturation level of the wearer has fallen to a dangerous value;
in step S3, a coordinate system is established for the pool from the known microphone locations.
7. The swimming pool life-saving system based on intelligence bracelet of claim 1, characterized in that: the step S1: the microcontroller inside the intelligent bracelet can measure the oxyhemoglobin saturation of the wearer according to certain time intervals, and when the drowning accident happens, the oxyhemoglobin saturation of the wearer can descend, and whether the drowning accident happens can be determined at this time.
8. The swimming pool life-saving system based on intelligence bracelet of claim 1, characterized in that: the step S2: the ultrasonic microphone on the bracelet can be opened to the system, a series of ultrasonic pulses are sent out, and a hydrophone array is arranged in the swimming pool and can receive ultrasonic signals.
9. The swimming pool life-saving system based on intelligence bracelet of claim 1, characterized in that: the step S3: according to the time difference of the ultrasonic signals received by the plurality of microphones recorded by the computer, an equation set can be listed by utilizing the transmission speed of the underwater sound waves, and the distance from the microphone to the sound source is calculated. And then, according to the principle of triangulation, the position of the sound source in the coordinate system of the swimming pool can be accurately calculated.
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| CN202011098127.3A CN112274147A (en) | 2020-10-14 | 2020-10-14 | Swimming pool life-saving system and method based on smart bracelet |
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| CN202011098127.3A CN112274147A (en) | 2020-10-14 | 2020-10-14 | Swimming pool life-saving system and method based on smart bracelet |
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| CN (1) | CN112274147A (en) |
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| CN114229633A (en) * | 2021-12-23 | 2022-03-25 | 福建省泉州市培元中学 | Intelligent floor control system of external elevator |
| CN115512517A (en) * | 2021-06-23 | 2022-12-23 | Oppo广东移动通信有限公司 | Positioning system for underwater rescue service |
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