CN109087479B - Multi-mode alarm method of adult safety bracelet - Google Patents

Abstract

A multi-mode alarm method of an adult safety bracelet belongs to the technical field of information, aims to solve the problem that the safety of adults is not enough in the prior bracelet, has the function of executing the multi-mode alarm method, and has the effect of solving the uneasy emotion of an intelligent bracelet user for positioning by designing a conventional mode and an emergency mode, namely a GPS positioning switch.

Description

Multi-mode alarm method of adult safety bracelet

technical field

The design belongs to the field of information technology, and relates to an adult safety smart bracelet with a single-chip microcontroller as the core.

Background technique

The existing wristbands are mainly used for health data detection, and some wristbands can be used for security. However, there are problems that the security of adults is insufficient, and the information is sensitive because the location information is still used when rescue is not needed. question.

SUMMARY OF THE INVENTION

In order to solve the problem of insufficient security for adults in the existing wristbands, and further information sensitivity problems caused by location information still being used when rescue is not required, the present invention proposes the following technical solutions:

A multi-mode alarm method of an adult safety bracelet, which executes the multi-mode alarm method.

The multi-mode alarm method:

S1. System initialization

S2. Key scan, select emergency state and normal state;

S2.1 Select the emergency state, the drive unit starts, the GPS module collects the location information, parses the GPS signal, and stores the GPS location information;

S2.1.1 grading alarm and sending location information;

S2.2 Select the normal state, choose the health mode and the safe mode;

S2.2.1 Select Health Mode

S2.2.1.1 The heart rate sensor starts, detects the heart rate, and judges whether the detected heart rate is safe;

S2.2.1.1.1 If the detected heart rate is safe, cyclically detect the heart rate;

S2.2.1.1.2 If the detected heart rate is unsafe, it will give a graded alarm;

S2.2.1.2 The temperature sensor starts, detects the body temperature, and judges whether the detected body temperature is safe;

S2.2.1.2.1 If the detected body temperature is safe, cycle the body temperature;

S2.2.1.2.2. If the detected body temperature is unsafe, a graded alarm will be issued;

S2.2.2. Select Safe Mode

S2.2.2.1 GPS module start

S2.2.2.1.1 The heart rate sensor is activated, detects the heart rate, and judges whether the detected heart rate is safe;

S2.2.2.1.1.1 If the detected heart rate is safe, cycle the heart rate;

S2.2.2.1.1.2 If the detected heart rate is unsafe, it will give a graded alarm and send location information;

S2.2.2.1.2 The temperature sensor starts, detects the body temperature, and judges whether the detected body temperature is safe;

S2.2.2.1.2.1 If the detected body temperature is safe, cycle the body temperature;

S2.2.2.1.2.2 If the detected body temperature is unsafe, the alarm will be graded and the location information will be sent;

S2.2.2.1.3 Analyze GPS signals, store GPS signals, record and count high-frequency stay areas on frequently used safe routes, determine whether staying in non-high-frequency stay areas exceeds the self-set time, and stay in high-frequency stay areas Whether the safety stop time has been exceeded, in the case of setting a safe route, whether the user's position deviates from the safe route by more than two kilometers, if it is judged to be no, it is safe, and if it is judged to be yes, it is unsafe;

S2.2.2.1.3.1 If it is safe, store the GPS signal cyclically and judge whether it is safe;

S2.2.2.1.3.2 If it is not safe, store the real-time GPS signal, and start a graded alarm and send the location.

The multi-selection mode position-traceable adult safety wristband includes a single-chip microcomputer, a detection unit, a key unit, an A/D conversion unit, an information transmission unit, a drive unit and a power supply unit.

The single-chip microcomputer includes a mode selection unit, a detection selection unit, an information processing unit and an output unit. The detection unit includes a heart rate sensor, a temperature sensor and a GPS receiving module; and signal processing unit; the information transmission unit uses the E104-BT02 module based on the Bluetooth chip DA14580, the drive unit includes a buzzer and a high-power LED; the display unit uses an LCD1602 display module; the power supply unit is powered by the power module, and the button unit Consists of buttons to control and switch modes;

The bracelet is connected to the mobile app via Bluetooth, and is set by the mobile app on the bracelet. The mobile app has an emergency contact module, on which 2 to 5 emergency contacts can be added. The bracelet has 4 operation buttons. They are the switch button, emergency button, health mode button and safety mode button. The bracelet has two working states, regular working state and emergency state. Under the regular working state, it is divided into two working modes: health mode and safety mode. When the bracelet is turned on, it will automatically enter the normal working state;

The emergency state mainly refers to the emergency situation when the user is accidentally violated, and the emergency state is activated by the emergency state button. The emergency state button sends the activation signal to the microcontroller, and the mode selection unit and the detection selection unit The drive unit works, the high-power LED and buzzer of the bracelet work, emits strong light and lasts for one second, and the buzzer sounds a bell, which produces strong light stimulation to the illegal intruders in the dark environment and attracts the attention of the people around. , At the same time, the bracelet is connected with the Bluetooth module to send alarm information to the alarm unit of the mobile app, and the mobile app will alarm the mobile app of the added contacts, classify the contacts and implement a hierarchical alarm, first send an alarm to the first The first-level contact alarms, and if the contact fails to respond in the mobile app within the set time, an alarm message will be sent to the second-level contact, and so on. The last-level contact has still not responded in its mobile app, and returns to the first-level contact to alarm, and cyclically executes the hierarchical alarm; in an emergency state, the geographical location information fed back by the GPS module of the bracelet is sent to the contact’s mobile phone in real time App;

Under normal working conditions, during normal work and life, the user activates the health mode through the health mode button, so that the heart rate sensor and temperature sensor of the detection unit work, and the signal processing unit processes it into an analog signal, and then the analog signal is converted by the A/D conversion unit. The signal is converted into a digital signal and transmitted to the single-chip microcomputer, and is transmitted to the display unit through the output unit to display the time, date, body temperature and heart rate, so as to maintain the basic monitoring of the health status. The GPS module does not work in this mode;

Before entering a dangerous environment, including walking at night or going to a remote area, the safe mode is selected by the safe mode button. In the safe working mode, the user can set a safe route, the GPS module works, and the position information is fed back to the single-chip microcomputer, and the A/D The conversion module transmits the information to the single-chip microcomputer, uploads it to the mobile app through the bluetooth module and stores it, and sends the route to the contact when the security is threatened. Record and count high-frequency stop areas on frequently used safe routes. If you stay in non-high-frequency stop areas for more than a self-set time, start a graded alarm and send the location. In high-frequency stop areas, you can set the safety stop time. At a fixed time, the graded alarm will be activated and the location will be sent. In the case of setting a safe route, if the user's position deviates from the safe route by two kilometers, the graded alarm will be activated and the position will be sent. In safe mode, the bracelet monitors the user's body temperature and heart rate at any time. The normal range level will start the alarm; the sending position is to send the geographic location information fed back by the GPS module of the wristband to the contact mobile app in real time;

Method of implementation

①Initialization settings: The user gets the smart bracelet, initializes the settings before the official use, connects to the mobile app via Bluetooth, and sets the graded contacts, safe routes, and the safe staying time of the high-frequency stay area and the non-high-frequency stay area; Set the safe fluctuation range of heart rate and body temperature according to the reference index; adjust the default maximum offset distance of the safe route according to the user's mobile device status and location, and complete the setting and enter step ②;

②State selection: The normal working state is selected by default; when an accident occurs, the emergency state button is activated to select the emergency state, the drive unit starts to flash the high-power LED, the buzzer sounds, the GPS module and the alarm unit start to work, and the location information is recorded. Activate hierarchical alarms and send location;

③Mode selection: when there is no obvious security threat in normal life and work, the normal working state is still selected or the normal working state is continued by turning on the machine, and the health mode and safety mode are selected through the button unit, and the selected mode information is sent to the single-chip microcomputer, the single-chip microcomputer Then the signal is transmitted to the detection unit, and the corresponding sensor works; in the healthy mode, go to step ④, and in the safe mode, go to step ⑤.

④Health mode: The temperature sensor and the green light-sensitive heart rate detector in the detection unit are activated, and the signal transmitted by the sensor is processed into an analog signal by the signal processing unit, and then the analog signal is converted into a digital signal by the A/D conversion unit, and then transmitted. For the microcontroller, the time, date, heart rate, and body temperature are displayed through the display unit. In the health mode, the GPS module does not work;

⑤Safety mode: All modules in the detection unit are started, and the connection with the mobile app is maintained through the Bluetooth module. The GPS module works and records the user's moving route in real time and uploads it to the mobile terminal for automatic storage. When the alarm conditions are met, the Bluetooth module is used The module sends the signal to the mobile app, and alerts the contact at different levels. The GPS module sends the real-time location. If the contact responds, the alarm stops, but the GPS module continues to send the location and moving route. The temperature sensor and the green light-sensitive heart rate detector work. Detect the user's heart rate and body temperature, the A/D conversion module converts the signal into a digital signal and transmits it to the single-chip microcomputer. Once the signal processing unit of the single-chip microcomputer detects that the heart rate and body temperature signal exceeds the predetermined safe range, it immediately transmits the signal to the Bluetooth module. The terminal App alerts the contact;

⑥Release the alarm: When the user changes from a dangerous state to a safe state, turn off the power switch of the bracelet, and restart to enter the next working cycle.

Beneficial effect: A positioning bracelet designed for the adult user group, which highlights the self-rescue function, rather than the existing passive monitoring on the market. The user's anxiety about being positioned. Secondly, the design adds an intelligent judgment function, which determines whether it is safe by monitoring the user's physiological characteristic data; and the built-in communication function, combined with the mobile app, can reserve three to five emergency contacts, and in emergency mode The alarm can be automatically dialed under the hood; and a built-in buzzer and high-power LED light, the buzzer realizes the alarm function, and the LED light can emit light to attract attention when the emergency mode is activated.

Description of drawings

Figure 1 is a block diagram of the system structure.

FIG. 2 is a flow chart of the program.

Detailed ways

As shown in Figure 1, the position-traceable adult safety bracelet in the multi-select mode is mainly composed of a single-chip microcomputer (STC12C5A60S2 single-chip microcomputer), a detection unit, a key unit, an A/D conversion unit, an information transmission unit, a drive unit and a power supply unit. The single-chip microcomputer includes a mode selection unit, a detection selection unit, an information processing unit and an output unit. The detection unit includes a heart rate sensor, a temperature sensor and a GPS receiving module; the detection unit consists of a green light photosensitive heart rate sensor, a DS18B20 temperature sensor, and a GPS module. Array and signal processing unit; the information transmission unit uses the E104-BT02 module based on the Bluetooth chip DA14580, and the drive unit includes a buzzer and high-power LED; the display unit uses the LCD1602 display module; the power supply unit is powered by the power module to realize the product The basic operation of the button unit is composed of various buttons, which are mainly used to control and switch other units, and are the most basic unit module of the product.

The bracelet is connected to the supporting mobile app via Bluetooth for most settings, alarms and other functions. 3-5 emergency contacts can be added to the App. For the sake of safety, the development of social functions is not considered. This design product mainly focuses on the safety function in the product function, which is to serve for safety, weakening other functions of the product, and emphasizing that for safety and live.

The bracelet has 4 operation buttons, namely the power switch button, emergency button, health mode button and safety mode button. When the bracelet is turned on, it will automatically enter the normal working state. The bracelet has two working states, namely emergency state and regular state. Under the regular working state, it is divided into two working modes: health mode and safety mode, which can be selected by users.

The emergency state is mainly used in emergency situations when the user is accidentally violated. When the emergency working state is selected through the button unit, the signal is sent to the single-chip microcomputer, and the drive unit works through the mode selection unit and the detection selection unit. The buzzer makes a bell, which can temporarily blind the other party in the dark environment, and attract the attention of the people around, effectively self-rescue. At the same time, the bracelet alarms the contact through the App connected to the Bluetooth module, and sends the location information fed back by the GPS module in real time. Contacts can be classified into levels, the first contact will be alerted first, the second contact will be alerted if the second contact does not respond within five minutes, and so on.

Under normal conditions, the user can select the health mode through the button unit during normal work and life, so that the heart rate sensor and temperature sensor of the detection unit work, and the signal processing unit processes it into an analog signal, and then the analog signal is converted by the A/D conversion unit. It is converted into digital signal and sent to the microcontroller, and sent to the display unit via the output unit to display the time, date, body temperature and heart rate, so as to maintain the basic monitoring of the health status. In the event of an accident, the emergency button can be selected directly through the key unit.

When you need to enter a dangerous environment, such as walking at night or going to remote areas, you can choose the safe mode. In the safe working mode, the user can customize the safe route, the GPS module works, and the position information is fed back to the microcontroller, the information is transmitted to the microcontroller through the A/D conversion module, and uploaded to the mobile terminal through the Bluetooth module and stored, and the safety is threatened. sent to a contact. With a navigation function, the user's moving route is recorded in real time and automatically stored for 15 days. Automatically count and record high-frequency stop areas on frequently used safe routes, and activate an alarm if you stay in non-high-frequency stop areas for longer than the self-set time. Similarly, you can also set safety stop times in high-frequency stop areas. time to activate the alarm. In the case of setting a safe route, if the user's position deviates from the safe route by two kilometers, an alarm will be activated. In the safe working mode, the bracelet monitors the user's body temperature and heart rate at any time, and starts an alarm if it exceeds the normal range.

As shown in Figure 2, the implementation method is as follows:

①Initialization settings: The user gets the smart bracelet and needs to initialize the settings before it is officially used. Bluetooth connects to the mobile app, and sets the level of contacts, safety routes, and the safety stop time of the high-frequency stop area and the non-high-frequency stop area; set the safe fluctuation range of heart rate and body temperature according to the reference index; according to the user's mobile device status and Adjust the default safe route maximum offset distance in your region. Go to step ②.

②State selection: The normal state is selected to work by default when the machine is turned on. When an accident occurs, the emergency state is selected through the button unit, that is, the drive unit starts, the high-power LED flashes, and the buzzer, GPS system and alarm unit start to work. In the normal state, go to step ③.

③ Mode selection: choose the normal state when you live and work normally without obvious security threats. The health mode and safety mode can be selected by the button unit, and the information is sent to the single-chip microcomputer, and the single-chip computer transmits the signal to the detection unit, and the corresponding sensor works. Go to step ④ in health mode, and go to step ⑤ in safe mode.

④Health mode: The temperature sensor and the green light-sensitive heart rate detector in the detection unit are activated, and the signal transmitted by the sensor is processed into an analog signal by the signal processing unit, and then the analog signal is converted into a digital signal by the A/D conversion unit, and then transmitted. To the microcontroller, basic data such as time, date, heart rate, and body temperature are displayed through the display unit. In health mode, the GPS system does not work.

⑤Safe mode: All modules in the detection unit are activated, and the connection with the mobile device is maintained through the Bluetooth module. The GPS module works and records the user's moving route in real time and uploads it to the mobile terminal for automatic saving. In the case of meeting the alarm conditions, the signal is sent to the mobile terminal through the Bluetooth module, and the contact is alarmed by grades, and the GPS module sends the real-time location. When the contact responds, the alarm stops, but the GPS module continues to send the location and movement route. The temperature sensor and the green light photosensitive heart rate detector work to detect the user's heart rate and body temperature. The A/D conversion module converts the signal into a digital signal and transmits it to the single-chip microcomputer. Once the signal processing unit of the single-chip microcomputer detects that the heart rate and body temperature signals exceed the predetermined safety range, immediately transmit the signal to the Bluetooth module, and alert the contact through the mobile terminal.

⑥Release the alarm: When the user changes from a dangerous state to a safe state, turn off the power switch of the bracelet, and restart to enter the next working cycle.

To sum up, the present invention fills the gap of the safety bracelet in the adult market, and the product is designed with a GPS positioning switch, which solves the user's concern about the safety of the GPS positioning function; in terms of function, it is combined with the mobile phone App to increase the function of calling for help, And set up self-defense tools to supplement the artificial intelligence; through the feedback of the sensors of the detection unit and the safety conditions set by the user, the diversified intelligent judgment of the user's personal safety, graded alarm, to ensure that the user is in distress in a timely manner. Effectively seeking help from the outside world can ensure rescue. In addition, the wristband has a regular working state in the health mode, so that it can perform the basic functions of the existing wristbands, avoiding the problem that the scope of use is too single.

As a further illustration, a multi-mode alarm method of an adult safety bracelet is as follows:

S1. System initialization

S2. Key scan, select emergency state and normal state;

S2.1 Select the emergency state, the drive unit starts, the GPS module collects the location information, parses the GPS signal, and stores the GPS location information;

S2.1.1 grading alarm and sending location information;

S2.2 Select the normal state, choose the health mode and the safe mode;

S2.2.1 Select Health Mode

S2.2.1.1 The heart rate sensor starts, detects the heart rate, and judges whether the detected heart rate is safe;

S2.2.1.1.1 If the detected heart rate is safe, cyclically detect the heart rate;

S2.2.1.1.2 If the detected heart rate is unsafe, it will give a graded alarm;

S2.2.1.2 The temperature sensor starts, detects the body temperature, and judges whether the detected body temperature is safe;

S2.2.1.2.1 If the detected body temperature is safe, cycle the body temperature;

S2.2.1.2.2. If the detected body temperature is unsafe, a graded alarm will be issued;

S2.2.2. Select Safe Mode

S2.2.2.1 GPS module start

S2.2.2.1.1 The heart rate sensor is activated, detects the heart rate, and judges whether the detected heart rate is safe;

S2.2.2.1.1.1 If the detected heart rate is safe, cycle the heart rate;

S2.2.2.1.1.2 If the detected heart rate is unsafe, it will give a graded alarm and send location information;

S2.2.2.1.2 The temperature sensor starts, detects the body temperature, and judges whether the detected body temperature is safe;

S2.2.2.1.2.1 If the detected body temperature is safe, cycle the body temperature;

S2.2.2.1.2.2 If the detected body temperature is unsafe, the alarm will be graded and the location information will be sent;

S2.2.2.1.3 Analyze GPS signals, store GPS signals, record and count high-frequency stay areas on frequently used safe routes, determine whether staying in non-high-frequency stay areas exceeds the self-set time, and stay in high-frequency stay areas Whether the safety stop time has been exceeded, in the case of setting a safe route, whether the user's position deviates from the safe route by more than two kilometers, if it is judged to be no, it is safe, and if it is judged to be yes, it is unsafe;

S2.2.2.1.3.1 If it is safe, store the GPS signal cyclically and judge whether it is safe;

S2.2.2.1.3.2 If it is not safe, store the real-time GPS signal, and start a graded alarm and send the location.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or modification of the created technical solution and its inventive concept shall be included within the protection scope of the present invention.

Claims (1)

1. a multi-mode alarm method for an adult safety bracelet, characterized in that: a multi-mode alarm method is performed, and the multi-mode alarm method comprises the steps: S1. System initialization S2. Key scan, select emergency state and normal state; S2.1 Select the emergency state, the drive unit starts, the GPS module collects the location information, parses the GPS signal, and stores the GPS location information; S2.1.1 grading alarm and sending location information; S2.2 Select the normal state, choose the health mode and the safe mode; S2.2.1 Select Health Mode S2.2.1.1 The heart rate sensor starts, detects the heart rate, and judges whether the detected heart rate is safe; S2.2.1.1.1 If the detected heart rate is safe, cyclically detect the heart rate; S2.2.1.1.2 If the detected heart rate is unsafe, it will give a graded alarm; S2.2.1.2 The temperature sensor starts, detects the body temperature, and judges whether the detected body temperature is safe; S2.2.1.2.1 If the detected body temperature is safe, cycle the body temperature; S2.2.1.2.2. If the detected body temperature is unsafe, a graded alarm will be issued; S2.2.2. Select Safe Mode S2.2.2.1 GPS module start S2.2.2.1.1 The heart rate sensor is activated, detects the heart rate, and judges whether the detected heart rate is safe; S2.2.2.1.1.1 If the detected heart rate is safe, cycle the heart rate; S2.2.2.1.1.2 If the detected heart rate is unsafe, it will give a graded alarm and send location information; S2.2.2.1.2 The temperature sensor starts, detects the body temperature, and judges whether the detected body temperature is safe; S2.2.2.1.2.1 If the detected body temperature is safe, cycle the body temperature; S2.2.2.1.2.2 If the detected body temperature is unsafe, the alarm will be graded and the location information will be sent; S2.2.2.1.3 Analyze GPS signals, store GPS signals, record and count high-frequency stay areas on frequently used safe routes, determine whether staying in non-high-frequency stay areas exceeds the self-set time, and stay in high-frequency stay areas Whether the safety stop time has been exceeded, in the case of setting a safe route, whether the user's position deviates from the safe route by more than two kilometers, if it is judged to be no, it is safe, and if it is judged to be yes, it is unsafe; S2.2.2.1.3.1 If it is safe, store the GPS signal cyclically and judge whether it is safe; S2.2.2.1.3.2 If it is not safe, store the real-time GPS signal, start a hierarchical alarm and send the location; The adult safety wristband includes a single-chip microcomputer, a detection unit, a key unit, an A/D conversion unit, an information transmission unit, a driving unit and a power supply unit; the single-chip microcomputer includes a mode selection unit, a detection selection unit, an information processing unit and an output unit , the detection unit includes a heart rate sensor, a temperature sensor and a GPS receiving module; the detection unit is a detection array and a signal processing unit composed of a green light photosensitive heart rate sensor, a DS18B20 temperature sensor, and a GPS module; the information transmission unit uses a Bluetooth chip DA14580-based E104-BT02 module, the drive unit includes buzzer and high-power LED; the display unit adopts LCD1602 display module; the power supply unit is powered by the power module, and the button unit is composed of buttons to control and switch modes; The bracelet is connected to the mobile app via Bluetooth, and is set by the mobile app on the bracelet. The mobile app has an emergency contact module, on which 2 to 5 emergency contacts can be added. The bracelet has 4 operation buttons. They are the switch button, emergency button, health mode button and safety mode button. The bracelet has two working states, regular working state and emergency state. Under the regular working state, it is divided into two working modes: health mode and safety mode. When the bracelet is turned on, it will automatically enter the normal working state; The emergency state mainly refers to the emergency situation when the user is accidentally violated, and the emergency state is activated by the emergency state button. The emergency state button sends the activation signal to the microcontroller, and the mode selection unit and the detection selection unit The drive unit works, the high-power LED and buzzer of the bracelet work, emits strong light and lasts for one second, and the buzzer sounds a bell, which produces strong light stimulation to the illegal intruders in the dark environment and attracts the attention of the people around. , At the same time, the bracelet is connected with the Bluetooth module to send alarm information to the alarm unit of the mobile app, and the mobile app will alarm the mobile app of the added contacts, classify the contacts and implement a hierarchical alarm, first send an alarm to the first The first-level contact alarms, and if the contact fails to respond in the mobile app within the set time, an alarm message will be sent to the second-level contact, and so on. The last-level contact has still not responded in its mobile app, and returns to the first-level contact to alarm, and cyclically executes the hierarchical alarm; in an emergency state, the geographical location information fed back by the GPS module of the bracelet is sent to the contact’s mobile phone in real time App; Under normal working conditions, during normal work and life, the user activates the health mode through the health mode button, so that the heart rate sensor and temperature sensor of the detection unit work, and the signal processing unit processes it into an analog signal, and then the analog signal is converted by the A/D conversion unit. The signal is converted into a digital signal and transmitted to the single-chip microcomputer, and is transmitted to the display unit through the output unit to display the time, date, body temperature and heart rate, so as to maintain the basic monitoring of the health status. The GPS module does not work in this mode; Before entering a dangerous environment, including walking at night or going to a remote area, the safe mode is selected by the safe mode button. In the safe working mode, the user can set a safe route, the GPS module works, and the position information is fed back to the single-chip microcomputer, and the A/D The conversion module transmits the information to the single-chip microcomputer, uploads it to the mobile app through the bluetooth module and stores it, and sends the route to the contact when the security is threatened. Record and count high-frequency stop areas on frequently used safe routes. If you stay in non-high-frequency stop areas for more than a self-set time, start a graded alarm and send the location. In high-frequency stop areas, you can set the safety stop time. At a fixed time, the graded alarm will be activated and the location will be sent. In the case of setting a safe route, if the user's position deviates from the safe route by two kilometers, the graded alarm will be activated and the position will be sent. In safe mode, the bracelet monitors the user's body temperature and heart rate at any time. The normal range level will start the alarm; the sending position is to send the geographic location information fed back by the GPS module of the wristband to the contact mobile app in real time; Method of implementation ①Initialization settings: The user gets the smart bracelet, initializes the settings before the official use, connects to the mobile app via Bluetooth, and sets the graded contacts, safe routes, and the safe staying time of the high-frequency stay area and the non-high-frequency stay area; Set the safe fluctuation range of heart rate and body temperature according to the reference index; adjust the default maximum offset distance of the safe route according to the user's mobile device status and location, and complete the setting and enter step ②; ②State selection: The normal working state is selected by default; when an accident occurs, the emergency state button is activated to select the emergency state, the drive unit starts to flash the high-power LED, the buzzer sounds, the GPS module and the alarm unit start to work, and the location information is recorded. Activate hierarchical alarms and send location; ③Mode selection: when there is no obvious security threat in normal life and work, the normal working state is still selected or the normal working state is continued by turning on the machine, and the health mode and safety mode are selected through the button unit, and the selected mode information is sent to the single-chip microcomputer, the single-chip microcomputer Then transmit the signal to the detection unit, and the corresponding sensor works; enter step ④ in healthy mode, and enter step ⑤ in safe mode; ④Health mode: The temperature sensor and the green light-sensitive heart rate detector in the detection unit are activated, and the signal transmitted by the sensor is processed into an analog signal by the signal processing unit, and then the analog signal is converted into a digital signal by the A/D conversion unit, and then transmitted. For the microcontroller, the time, date, heart rate, and body temperature are displayed through the display unit. In the health mode, the GPS module does not work; ⑤Safety mode: All modules in the detection unit are started, and the connection with the mobile app is maintained through the Bluetooth module. The GPS module works and records the user's moving route in real time and uploads it to the mobile terminal for automatic storage. When the alarm conditions are met, the Bluetooth module is used The module sends the signal to the mobile app, and alerts the contact at different levels. The GPS module sends the real-time location. If the contact responds, the alarm stops, but the GPS module continues to send the location and moving route. The temperature sensor and the green light-sensitive heart rate detector work. Detect the user's heart rate and body temperature, the A/D conversion module converts the signal into a digital signal and transmits it to the single-chip microcomputer. Once the signal processing unit of the single-chip microcomputer detects that the heart rate and body temperature signal exceeds the predetermined safe range, it immediately transmits the signal to the Bluetooth module. The terminal App alerts the contact; ⑥Release the alarm: When the user changes from a dangerous state to a safe state, turn off the power switch of the bracelet, and restart to enter the next working cycle.

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