阅读说明：本技术 一种安全智能游泳圈及报警方法 (Safe and intelligent swim ring and alarm method ) 是由 仇成群 卞月根 董昂 周叶洋 林萌 许峻杰 于 2021-08-06 设计创作，主要内容包括：本发明公开一种安全智能游泳圈及报警方法,所述游泳圈由游泳圈为本体、智能控制系统和智能安全系统组成。智能控制系统由传感器、控制电路和电源模块组成；智能安全系统由定位器、姿态传感器和微型无线对讲模块组成。定位器为核心模块,采用蜂窝移动通信技术传输数据,安全智能监控系统接收数据,实现对游泳者的地理位置、姿态角度和呼救需求等数据分析,能够及时且准确地对游泳者状态进行监测预警并能对危险进行判断分级并报警,将游泳者危险状况分为Ⅰ、Ⅱ、Ⅲ三个不同等级,安全智能监控系统及10V有源蜂鸣器根据不同危险等级采取不同报警方式,从而有效降低游泳者发生危险的概率和发生危险后所造成的损失。(The invention discloses a safe and intelligent swim ring and an alarm method. The intelligent control system consists of a sensor, a control circuit and a power module; the intelligent safety system consists of a locator, an attitude sensor and a miniature wireless intercom module. The locator is the core module, adopt cellular mobile communication technology transmission data, safe intelligent monitoring system received data, realize the data analysis such as geographical position to the swimmer, gesture angle and call for help demand, can in time and accurately monitor the early warning and can judge dangerous grading and report to the police to the swimmer state, divide into I with the dangerous situation of swimmer, II, III three different grades, safe intelligent monitoring system and 10V active bee calling organ take different alarm modes according to different dangerous grades, thereby effectively reduce the probability that the swimmer takes place danger and take place the loss that causes after dangerous.)

1. A secure intelligent swim ring, comprising: the swimming ring comprises a swimming ring body (1), an intelligent control system and an intelligent safety system;

wherein, water wing body (1) includes: the swimming ring comprises a resistance-type thin-sheet pressure sensor 4 and a box (2) carrying an intelligent control system and an intelligent safety system, wherein the resistance-type thin-sheet pressure sensor 4 is packaged on two sides of the swimming ring by adopting a waterproof material 3; the whole box 2 is stuck to two sides in the swim ring by waterproof adhesive, and a push-button for help 5 is left at the top end of the box; it is characterized in that the preparation method is characterized in that,

the intelligent control system comprises: a resistance type thin sheet pressure sensor (4) packaged on the surface of the swim ring and a control circuit packaged in a box (2) inside the swim ring;

the smart security system includes: the device comprises a locator 7, a buzzer 8, an indicator light 9, an attitude sensor 10, a pressure sensing access section 16, a power charging end 18 and a wireless communication module 20.

2. The safety intelligent swim ring of claim 1, wherein the control circuit comprises: the device comprises a resistance type sheet pressure sensor 4, a first resistor 11, a second resistor 12, a third resistor 13, a fourth resistor 14, a voltage comparator 15, a potentiometer 17, a triode 19, a relay H end 21, a relay Z end 22 and a relay 23;

the resistance type thin sheet pressure sensor 4 and the first resistor 11 are connected in series into a circuit, and the other end of the first resistor 11 is grounded; the common end of the resistance-type sheet pressure sensor 4 and the first resistor 11 is connected to the input end A of the voltage comparator 15; the potentiometer 17 is connected with the second resistor 12 in series to form a circuit, and the common end of the potentiometer 17 and the second resistor 12 is connected to the input end B of the voltage comparator 15; the VCC end of the voltage comparator 15 is connected in series with the third resistor 13, the other end of the third resistor 13 is connected with the C end of the triode 19, the third resistor 13 and the common end of the triode 19 are connected in series with one end of the fourth resistor 14, and the other end of the fourth resistor 14 is grounded; the end B of the triode 19 is connected with the relay 23 in series, and the end A of the triode 19 is grounded; the relay H end 21 is connected with a 15V rechargeable lithium battery pack 24 in series, and the relay Z end 22 is an output end.

3. The safety intelligent swimming ring according to claim 2, wherein a 15V rechargeable lithium battery pack 24 supplies power to the locator 7; wherein the locator 7 is embedded with an attitude sensing module.

4. A safety intelligent swimming ring according to any one of claims 1-3, wherein the box 2 carrying the intelligent control system and the intelligent safety system seals internal electronic elements with waterproof material 3 of IP68 grade.

5. The safety intelligent swim ring of any one of claims 1-3, wherein the swim ring body 1 is further provided with an air charging port and a charging port 6.

6. A method of alarming a safe and intelligent swim ring according to any one of claims 1-5, comprising:

step 1), applying pressure to the resistance-type sheet pressure sensor 4, and electrifying a 15V rechargeable lithium battery pack 24 through the box carrying the intelligent control system and the intelligent safety system;

step 2), the circuit is connected, and the positioner 7, the micro wireless communication module 20, the buzzer 8 and the attitude sensor 10 are started;

step 3), the positioner 7 and the attitude sensor 10 transmit data to corresponding intelligent control systems and intelligent safety systems through a cellular mobile communication technology;

and 4), analyzing different use scenes of a user by the intelligent control system and the intelligent safety system through different voltage amplification factors, identifying whether the user is in a dangerous scene or not according to data fluctuation and dynamic analysis, distinguishing danger levels, and sending electric signals with different frequencies and audio signals with different decibels.

7. The alarm method according to claim 6, wherein in step 3), the attitude sensor 10 feeds back electric signals with different frequencies to the control circuit according to different attitude data, changes the magnification of the control circuit, and gives an early warning notice to a supervisor through a cellular mobile communication technology once the magnification fluctuates too much.

8. The alarm method according to claim 6 or 7, wherein in the step 4), identifying whether the alarm is in a dangerous situation and distinguishing the danger level according to data fluctuation and dynamic analysis specifically comprises: if the user is judged not to be dangerous, the monitoring is kept to be continued; if the user is judged to be dangerous, further, when the I-level danger exceeds 3 minutes, the human body is judged to be slightly injured, when the II-level danger exceeds 1 minute, the human body is judged to be moderately severely injured, and when the III-level danger exceeds 30 seconds, the human body is judged to be injured.

9. The alarm method according to claim 8, wherein the initial posture is set to 0 °, and the initial circuit magnification is set toWhen the posture inclination angle of the user is 15-30 degrees, the circuit magnification is increasedThe system identifies common danger, defines as I-level danger, and sends out 900KHz electric signals; when the posture inclination angle of the user is 31-45 degrees, the circuit magnification is increasedThe system recognizes as a first-level danger, defines as a second-level danger, and sends out a 1.5MHz electric signal; when the posture inclination angle of the user is between 46 and 360 degrees, the circuit magnification is increasedThe system recognizes as a second level hazard, defined as a level iii hazard, and emits a 2.6MHz electrical signal.

10. The warning method as claimed in claim 9, wherein when a level i hazard is identified, the buzzer sounds a warning sound with a frequency of 10Hz and a loudness of 60-70 dB; when II-level danger is identified, the buzzer sends out an alarm sound with the frequency of 5000Hz and the loudness of 70-80 dB; when the class-III danger is identified, the buzzer sends out two alarm sounds, wherein one alarm sound has the frequency of 15000Hz and the loudness of 80-100dB, and the other alarm sound is an ultrasonic alarm sound with the frequency of 30000Hz and the loudness of 80-100 dB; the first-level danger is a yellow alarm signal, the second-level danger is an orange alarm signal, and the third-level danger is a red alarm signal.

Technical Field

The invention relates to the field of automatic control systems, in particular to a safe and intelligent swim ring and an alarm method.

Background

By 2016, the total scale of the swimming industry in China reaches 26.2 hundred million. 9500 million ginseng and swimming sports are performed every year, 15 hundred million people are counted, and 800 million people can swim every year. The sudden and violent development of the requirement of the sports industry in China drives the vigorous development of the whole natatorium industry, wherein the natatorium industry also faces very good development opportunities, but a plurality of factors restrict the development of the natatorium industry.

The intelligent swim ring is an advanced intelligent swim ring developed specially for safe swimming, can effectively reduce the probability of occurrence of swimming safety accidents, can give an alarm in time even if the safety accidents occur, and reduces the accident damage to the minimum. The swimming device creates a safe and comfortable swimming environment, reduces the worry of the swimmer about safety accidents, meets the requirement of the swimmer on safe swimming, protects the safety of the swimmer and improves the swimming comfort.

Disclosure of Invention

The purpose of this product is in order to prevent and reduce the danger that swimming takes place, provides the chance of promptly seeking help for the people who is in the dangerous condition simultaneously, pinpoints the geographical position of the person of seeking help in the short time, and relevant personnel receive the information of seeking help in the short time, in time takes relevant rescue measures.

In order to achieve the purpose, the invention is realized by the following scheme:

a secure intelligent swim ring, comprising: the swimming ring comprises a swimming ring body (1), an intelligent control system and an intelligent safety system;

wherein, water wing body (1) includes: the swimming ring comprises a resistance-type thin-sheet pressure sensor 4 and a box (2) carrying an intelligent control system and an intelligent safety system, wherein the resistance-type thin-sheet pressure sensor 4 is packaged on two sides of the swimming ring by adopting a waterproof material 3; the whole box 2 is stuck to two sides in the swim ring by waterproof adhesive, and a push-button for help 5 is left at the top end of the box; the intelligent control system comprises: a resistance type thin sheet pressure sensor (4) packaged on the surface of the swim ring and a control circuit packaged in a box (2) inside the swim ring;

the smart security system includes: the device comprises a locator 7, a buzzer 8, an indicator light 9, an attitude sensor 10, a pressure sensing access section 16, a power charging end 18 and a wireless communication module 20.

Further, the control circuit comprises: the device comprises a resistance type sheet pressure sensor 4, a first resistor 11, a second resistor 12, a third resistor 13, a fourth resistor 14, a voltage comparator 15, a potentiometer 17, a triode 19, a relay H end 21, a relay Z end 22 and a relay 23;

the resistance type thin sheet pressure sensor 4 and the first resistor 11 are connected in series into a circuit, and the other end of the first resistor 11 is grounded; the common end of the resistance-type sheet pressure sensor 4 and the first resistor 11 is connected to the input end A of the voltage comparator 15; the potentiometer 17 is connected with the second resistor 12 in series to form a circuit, and the common end of the potentiometer 17 and the second resistor 12 is connected to the input end B of the voltage comparator 15; the VCC end of the voltage comparator 15 is connected in series with the third resistor 13, the other end of the third resistor 13 is connected with the C end of the triode 19, the third resistor 13 and the common end of the triode 19 are connected in series with one end of the fourth resistor 14, and the other end of the fourth resistor 14 is grounded; the terminal B of the transistor 19 is connected in series with the relay 23, and the terminal a of the transistor 19 is grounded. The relay H end 21 is connected with a 15V rechargeable lithium battery pack 24 in series, and the relay Z end 22 is an output end.

Further, among them, a 15V rechargeable lithium battery pack 24 supplies power to the positioner 7; wherein the locator 7 is embedded with an attitude sensing module.

Furthermore, the box 2 carrying the intelligent control system and the intelligent security system adopts IP 68-level waterproof material 3 to seal internal electronic elements.

Furthermore, an inflation port and a charging port 6 are also arranged on the swim ring body 1.

The alarm method of the safe and intelligent swim ring is further provided, and comprises the following steps:

step 1), applying pressure to the resistance-type sheet pressure sensor 4, and electrifying a 15V rechargeable lithium battery pack 24 through the box carrying the intelligent control system and the intelligent safety system;

step 2), the circuit is connected, and the positioner 7, the micro wireless communication module 20, the buzzer 8 and the attitude sensor 10 are started;

step 3), the positioner 7 and the attitude sensor 10 transmit data to corresponding intelligent control systems and intelligent safety systems through a cellular mobile communication technology;

and 4), analyzing different use scenes of a user by the intelligent control system and the intelligent safety system through different voltage amplification factors, identifying whether the user is in a dangerous scene or not according to data fluctuation and dynamic analysis, distinguishing danger levels, and sending electric signals with different frequencies and audio signals with different decibels.

Further, in step 3), the attitude sensor 10 feeds back electric signals with different frequencies to the control circuit according to different attitude data, changes the magnification of the control circuit, and gives an early warning notice to a monitor through a cellular mobile communication technology once the magnification fluctuates too much.

Further, in the step 4), identifying whether the mobile terminal is in a dangerous situation according to data fluctuation and dynamic analysis, and distinguishing the dangerous level specifically includes: if the user is judged not to be dangerous, the monitoring is kept to be continued; if the user is judged to be dangerous, further, when the I-level danger exceeds 3 minutes, the human body is judged to be slightly injured, when the II-level danger exceeds 1 minute, the human body is judged to be moderately severely injured, and when the III-level danger exceeds 30 seconds, the human body is judged to be injured.

Further, setting the initial attitude to be 0 DEG, and amplifying the initial circuitWhen the posture inclination angle of the user is 15-30 degrees, the circuit magnification is increasedThe system identifies common danger, defines as I-level danger, and sends out 900KHz electric signals; when the posture inclination angle of the user is 31-45 degrees, the circuit magnification is increasedThe system recognizes as a first-level danger, defines as a second-level danger, and sends out a 1.5MHz electric signal; when the posture inclination angle of the user is between 46 and 360 degrees, the circuit magnification is increasedThe system recognizes as a second level hazard, defined as a level iii hazard, and emits a 2.6MHz electrical signal.

Further, when I-level danger is identified, the buzzer gives an alarm sound with the frequency of 10Hz and the loudness of 60-70 dB; when II-level danger is identified, the buzzer sends out an alarm sound with the frequency of 5000Hz and the loudness of 70-80 dB; when the class-III danger is identified, the buzzer sends out two alarm sounds, wherein one alarm sound has the frequency of 15000Hz and the loudness of 80-100dB, and the other alarm sound is an ultrasonic alarm sound with the frequency of 30000Hz and the loudness of 80-100 dB; the first-level danger is a yellow alarm signal, the second-level danger is an orange alarm signal, and the third-level danger is a red alarm signal.

Compared with the prior art, the invention has the following beneficial effects:

the intelligent control system of the invention achieves the effect of jointing the circuit by the pressure of the user on the pressure sensor, and plays the role of an intelligent control circuit. The intelligent safety system can utilize the safety intelligent monitoring system to carry out real-time monitoring and feedback, thereby playing the roles of early warning and alarming and playing the safety role of the invention. The 10V active buzzer and the miniature wireless communication module can enable a user to timely feed back the conditions of the user and nearby people to a monitor, and the safety range of the intelligent monitoring system is expanded to the extent that the user does not use the intelligent monitoring system.

The intelligent alarm system can automatically analyze different use scenes of a user through different voltage amplification factors, identify whether the user is in a dangerous scene or not according to data fluctuation and dynamic analysis, automatically distinguish danger levels, and finally play an intelligent alarm function by sending electric signals with different frequencies and audio signals with different decibels.

The invention can accurately and timely predict the danger and is provided with an alarm level measuring and calculating system. The attitude sensor transmits electric signals with different frequencies to the intelligent control circuit according to different attitude data, the amplification factor of the intelligent control circuit is changed, and if the fluctuation of the amplification factor is too large, the intelligent control circuit gives an early warning notice to a monitor through a cellular mobile communication technology.

The invention can automatically analyze the state of the swimmer through different voltage amplification factors, identify whether the swimmer is in a dangerous situation or not according to data fluctuation and dynamic analysis, automatically distinguish dangerous grades, and finally play an intelligent alarm function by sending electric signals with different frequencies and sound signals with different decibels.

When the miniature wireless intercom module is in danger, the miniature wireless intercom module can timely react to a monitor to help other people to escape in time, and the effect of enabling the safe radiation range of the product to cover other people using the common swimming ring and benefiting people is achieved.

Drawings

Fig. 1 is a schematic view of a swim ring.

Fig. 2 is a schematic view of the inside of a cassette having an intelligent control system and an intelligent security system mounted thereon.

Fig. 3 is a schematic diagram of a control circuit.

Fig. 4 is an alarm flow chart.

The reference numerals in the figures are to be interpreted as:

1-a swim ring body, 2-a box carrying an intelligent control system and an intelligent safety system, 3-IP 68-level waterproof coating, 4-a resistive sheet pressure sensor, 5-a help-seeking button, 6-an inflation inlet and a charging inlet, 7-GPS & Beidou two-star locator, 8-10V active buzzer, 9-an indicator light, 10-an attitude sensor, 11-a first resistor, 12-a second resistor, 13-a third resistor, 14-a fourth resistor, 15-a voltage comparator, 16-a pressure sensing access section, 17-a potentiometer, 18-a power supply charging end, 19-a triode, 20-a miniature wireless communication module, 21-a relay H end, 22-a relay Z end, 23-a relay and 24-15V rechargeable lithium battery pack.

Detailed Description

The present invention will be described in further detail with reference to the drawings and specific examples, which are provided for illustration only and are not intended to limit the scope of the present invention.

Please refer to fig. 1, which is a schematic structural diagram of a safety intelligent swim ring, including: the swimming ring comprises a swimming ring body (1), an intelligent control system and an intelligent safety system.

Wherein, water wing body 1 includes: the device comprises a resistance-type sheet pressure sensor 4 and a box 2 carrying an intelligent control system and an intelligent safety system, wherein the resistance-type sheet pressure sensor 4 is packaged on two sides of a swim ring by adopting IP 68-grade waterproof materials 3; the casket 2 carrying the intelligent control system and the intelligent safety system adopts IP 68-level waterproof materials 3 to seal internal electronic elements, the whole casket 2 is stuck on two sides of the inside of the swim ring by waterproof adhesives, and a push-to-call help button 5 packaged by IP 68-level waterproof materials is left at the top end of the casket. The swim ring body 1 is also provided with an inflation inlet and a charging inlet 6. The inflation inlet and the charging inlet 6 are used for inflating the swim ring on one hand and charging various electric devices on the other hand.

The intelligent control system adopts an integral control circuit which takes a resistance type thin sheet pressure sensor as a main control core, a voltage comparator as an analysis core, a relay as a main control switch and a 15V rechargeable lithium battery pack as an energy supply device and a light emitting diode as main display.

The intelligent control system includes: a resistance type thin sheet pressure sensor (4) packaged on the surface of the swim ring and a control circuit packaged in a box (2) inside the swim ring.

The resistance strain gauge is the core part of the resistance type thin sheet pressure sensor (4), and directly influences various performance indexes of the sensor. The working principle of the resistance strain gauge is based on the strain effect of metal. The phenomenon in which the electrical resistance of a metal conductor changes with the amount of mechanical deformation (elongation or contraction) to which it is subjected is known as the resistive strain effect of metals. The mathematical principles involved therein are detailed below:

setting a section of metal wire with length l, section S and resistivity rho, wherein the resistance of the metal wire is as follows:

in the formula:

r-resistance of the wire (omega)

Rho-resistivity (omega. mm)²·m^-1)

l-wire length (m)

Cross sectional area (mm) of S-wire²)

When the length l of the wire changes by Deltal, the sectional area S changes by DeltaS, the radius R changes by Deltar, and the resistivity rho changes by Deltarho under the action of the force F, R changes by DeltaR, and the equation (1) is differentiated to obtain the product

Because S-pi r²

dΔS×2πdΔr

Therefore, it is not only easy to use

Order toFor relative axial elongation, i.e. axial strain, of the resistance wire, andthe resistance wire is relatively extended in the radial direction, namely the radial strain, and the proportionality coefficient of the resistance wire and the resistance wire is The longitudinal deformation coefficient is shown, alpha is the longitudinal numerical value, gamma is the Poisson coefficient, and the negative sign indicates the opposite direction. The poisson coefficient is the ratio of the transverse strain to the longitudinal strain of a material, also called the transverse deformation coefficient, and is an elastic constant reflecting the transverse deformation of the material. Within the proportional limits of isotropic materials, the absolute value of the product of the transverse strain caused by the uniformly distributed longitudinal stress and the corresponding longitudinal strain is determined as the change in the material, generally by experimental methods. Satisfies the following formula:

substituting formula (4) into formula (3) to obtain:

bringing formula (5) into formula (2) and finishing:

k is called the sensitive coefficient of the metal material, and the physical meaning of k is the relative change of resistance caused by unit strain, and as can be seen from the formula (7), the sensitive coefficient of the metal material is influenced by two factors: on the one hand, caused by changes in the geometry of the material after the force is applied, i.e.An item; on the other hand, due to changes in the resistivity of the material after being stressed, i.e. byAn item. This is because the material is deformed, and the mobility and number of free electrons change, and since this item cannot be expressed by an analytical formula before, k can be obtained only by experiments. It has been demonstrated from a number of experiments that the relative change in resistance is proportional to strain, i.e. k is a constant, within the proportional limits of the resistance wire stretch. Thus, expression (7) in increments can be written as:

the above formula indicates that the relative change in resistance of the metal wire material is proportional to the axial strain, i.e., the axial strain can be reflected by the relative change in resistance.

In the scheme, the resistance type sheet pressure sensor (4) can convert pressure change into resistivity change and finally into voltage change, and the resistivity change is finally converted into voltage change through the combined action of the LM393 voltage comparator and the pull-up resistor, and finally the resistance type sheet pressure sensor is connected with a circuit to play a role of an intelligent control circuit, so that the effects of starting when in use and stopping when in idle are achieved, and high-efficiency, intelligent and humanized energy conservation is achieved.

As shown in fig. 2 and 3, the control circuit includes: the sensor comprises a resistance type sheet pressure sensor 4, a first resistor 11, a second resistor 12, a third resistor 13, a fourth resistor 14, a voltage comparator 15, a potentiometer 17, a triode 19, a relay H end 21, a relay Z end 22 and a relay 23.

The resistance type thin sheet pressure sensor 4 and the first resistor 11 are connected in series to a circuit, and the other end of the first resistor 11 is grounded. The common end of the resistive sheet pressure sensor 4 and the first resistor 11 is connected to the input A end of the voltage comparator 15. The potentiometer 17 is connected in series with the second resistor 12, and the common end of the potentiometer 17 and the second resistor 12 is connected to the input end B of the voltage comparator 15. The VCC end of the voltage comparator 15 is connected in series with the third resistor 13, the other end of the third resistor 13 is connected with the C end of the triode 19, the third resistor 13 and the common end of the triode 19 are connected in series with one end of the fourth resistor 14, and the other end of the fourth resistor 14 is grounded. The terminal B of the transistor 19 is connected in series with the relay 23, and the terminal a of the transistor 19 is grounded. The relay H end 21 is connected with a 15V rechargeable lithium battery pack 24 in series, and the relay Z end 22 is an output end.

The pressure sensor 4 is reduced through the pressure applying resistor, so that the voltage comparator 15 outputs high-level voltage, the triode 19 is switched on, finally the relay 23 is switched on, and the power supply is output through the relay Z end 22 to play a role in starting a circuit. The first resistor 11, the second resistor 12, the third resistor 13 and the fourth resistor 14 play a role of protecting a circuit. The potentiometer 17 determines different resistance values according to the weight of the user.

The intelligent security system includes: GPS & big Dipper two star locator 7, 10V active buzzer 8, pilot lamp 9, attitude sensor 10, pressure sensing access section 16, power charging end 18, wireless communication module 20.

The intelligent safety system adopts a safety system which takes a GPS and Beidou double-star locator as a core, a wireless communication module and a distress button as a distress device, a 10V active buzzer as an alarm device and an attitude sensor as core feedback and realizes the intelligentization of the Internet of things.

Wherein, the 15V rechargeable lithium battery pack 24 provides power for the GPS & Beidou two-satellite positioner 7. The GPS and Beidou double-star locator 7 is embedded with an attitude sensing module, the module calculates to obtain a rough position by measuring a carrier phase value from each built-in antenna to a satellite, and then obtains an accurate position by data analysis, and the positioning accuracy reaches 1-2 meters.

The GPS&The algorithm adopted by the Beidou double-star locator 7 is a KNNp (K-nearest neighbor borpro) algorithm, and the KNNp is a non-parametric and inert algorithm model. Selecting a plurality of smaller K values, performing minimum screening to select K_maxThen, the value of K is continuously increased, then the variance of the verification set is calculated, and finally a proper K value is found. The optimal K can be selected by starting with K1 and increasing step by step, and analyzing the accuracy by using the test data. This result is balanced between the accuracy and the calculation amount, for example, when K is 3, the accuracy is 90%, and when K is 10, the accuracy is 91%, and then it needs to be consideredIt is cost effective to calculate the 1% improvement in conversion. The distance of the midpoint in the space is measured by the following measurement modes, such as Manhattan distance calculation, Euclidean distance calculation and the like. Generally, the euclidean distance used in the KNNp algorithm is, taking a three-dimensional plane as an example, the euclidean distance calculation formula of two points in a three-dimensional space is as follows:

extending to multiple points in three-dimensional space, the formula becomes:

the KNNp algorithm calculates the distance between the predicted point and all points, then stores and sorts the points, and selects the previous K values to compare with which types are more. It may also be aided by some optimization techniques, and the sample data may be ordered first, knowing which data only needs to be compared to (but for high dimensional data this is hardly feasible). The sample data may also be divided into a plurality of subsets, and the data to be classified only needs to be compared with one or more of the subsets. For example, if the attribute is longitude and latitude and the distance is the distance between 2 longitude and latitude points, the samples can be divided into different subsets according to the integer part of the longitude and latitude, the tuple to be classified only needs to be compared with the subset with the same integer part, and when the sample data of the subset is less than K, the subset is compared with the adjacent set.

Advantages of the KNNp algorithm:

(1) the method is simple and easy to use, compared with other algorithms, the KNNp algorithm is a simpler and clearer algorithm, and a deep mathematical basis is not needed.

(2) The KNNp algorithm has inertia and short model training time.

(3) The prediction effect is good.

(4) Insensitive to abnormal values.

Preferably, the first resistor 11 has a resistance value of: 10k omega; the resistance of the second resistor 12 is: 10k omega; the third resistor 13 has a resistance value of: 1k omega; the fourth resistor 14 has a resistance value of: 4.7k omega; a potentiometer: 50K; voltage comparator model: LM 393; the type of the triode: NPN type 9013, specification: maximum collector current (a): 0.5A, dc gain: 10-60A, power consumption: 625mW, maximum collector-emitter Voltage (VCEO): 25V, characteristic frequency: 150 MHz; a relay: 12V, GPS & big dipper two star locator adopt and do not use the library function to realize that hand-written digit discernment calculates optimum K, miniature wireless communication module, 10V active buzzer, attitude sensor adopts the carrier phase value who measures every embedded antenna to the satellite to calculate and obtain the gesture situation, chargeable lithium cell group parameter: 11.1V; 1.6 AH.

As shown in fig. 4, an alarm flow chart of the present invention includes:

and step 1), applying pressure to the resistance-type sheet pressure sensor 4, and electrifying the 15V rechargeable lithium battery pack 24 through the box carrying the intelligent control system and the intelligent safety system.

And step 2), a circuit is connected, and the GPS and Beidou double-star locator 7, the miniature wireless communication module 20, the 10V active buzzer 8 and the attitude sensor 10 are started.

And step 3), the GPS and Beidou double-star locator 7 and the attitude sensor 10 transmit data to the corresponding intelligent control system and the intelligent safety system through a cellular mobile communication technology.

In step 3), the attitude sensor 10 feeds back electric signals with different frequencies to the control circuit according to different attitude data, changes the amplification factor of the control circuit, and gives an early warning notice to a supervisor through a cellular mobile communication technology once the amplification factor fluctuates too much.

And 4), analyzing different use scenes of a user by the intelligent control system and the intelligent safety system through different voltage amplification factors, identifying whether the user is in a dangerous scene or not according to data fluctuation and dynamic analysis, distinguishing danger levels, and sending electric signals with different frequencies and audio signals with different decibels.

In the step 4), identifying whether the dangerous situation exists or not and distinguishing the danger level according to data fluctuation and dynamic analysis specifically comprises the following steps: if the user is judged not to be dangerous, the monitoring is kept to be continued; if the user is judged to be dangerous, further, when the I-level danger exceeds 3 minutes, the human body is judged to be slightly injured, when the II-level danger exceeds 1 minute, the human body is judged to be moderately severely injured, and when the III-level danger exceeds 30 seconds, the human body is judged to be injured.

Specifically, the initial attitude is set to 0 °, and the initial circuit magnification is set toWhen the posture inclination angle of the user is 15-30 degrees, the circuit magnification is increasedThe system identifies common danger, defines as I-level danger, and sends out 900KHz electric signals; when the posture inclination angle of the user is 31-45 degrees, the circuit magnification is increasedThe system recognizes as a first-level danger, defines as a second-level danger, and sends out a 1.5MHz electric signal; when the posture inclination angle of the user is between 46 and 360 degrees, the circuit magnification is increasedThe system recognizes as a second level hazard, defined as a level iii hazard, and emits a 2.6MHz electrical signal.

Further, when I-level danger is identified, the 10V active buzzer sends out alarm sound with frequency of 10Hz and loudness of 60-70 dB; when II-level danger is identified, the 10V active buzzer emits alarm sound with the frequency of 5000Hz and the loudness of 70-80 dB; when a class III hazard is identified, the 10V active buzzer emits two kinds of alarm sound, one alarm sound with the frequency of 15000Hz and the loudness of 80-100dB, and the other alarm sound is an ultrasonic alarm sound with the frequency of 30000Hz and the loudness of 80-100 dB. The first-level danger is a yellow alarm signal, the second-level danger is an orange alarm signal, and the third-level danger is a red alarm signal.

It should be finally noted that the above examples are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and that other variations and modifications based on the above description and thought may be made by those skilled in the art, and that all embodiments need not be exhaustive. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.