Safe driving system based on heart rate monitoring of driver

Abstract

The invention relates to the technical field of safe driving, and provides a safe driving system based on heart rate monitoring of a driver, which comprises heart rate monitoring equipment, a posture detection device and a vehicle-mounted terminal, the heart rate monitoring equipment is used for monitoring the heart rate of the driver in real time; the posture detection device comprises a wearable detection device and a non-wearable detection device, and when the posture detection device detects that the posture of a driver deviates from a normal three-dimensional position range, the posture detection device sends an emergency signal to the vehicle-mounted terminal; and the vehicle-mounted terminal is used for giving out a prompt and emergently stopping when the heart rate of the driver exceeds a normal value. The heart rate of a driver is monitored in real time through the heart rate monitoring device, when the heart rate exceeds a heart rate critical value, the alarm module pops up a warning pop-up window on the operation panel, inquires the condition of the driver through the loudspeaker, and sends parking information to a braking system of the vehicle, so that the vehicle is decelerated and parked, and the driving safety is improved. Meanwhile, vehicle double-flash is turned on through the light control system, collision of rear vehicles is avoided, and the possibility of traffic accidents is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of safe driving, and in particular to a safe driving system based on driver heart rate monitoring. Background Art

[0002] During long-distance driving, for driving safety, the car reminds the driver to rest every 4 hours through the on-board terminal. The on-board terminal mainly has functions such as vehicle positioning, information collection, driving records, calls, monitoring, and warnings. In recent years, cardiovascular and cerebrovascular diseases have greatly affected people's health. Cardiovascular and cerebrovascular diseases are rapid and fatal. Due to the influence of stress, environment and other factors, the incidence of sudden diseases such as cerebral infarction and myocardial infarction of drivers continues to increase. In view of this feature, a number of instruments and equipment for detecting heart rate have appeared on the market.

[0003] The driver heart rate monitoring and alarm system with authorization publication number CN 105455799 A monitors the driver's heart rate in real time through a heart rate monitor. When the driver's heart rate is detected to be out of the range, a voice alarm function is implemented, and a voice prompt is sent to the car through the speaker on the car, asking the driver to prepare to slow down or stop. At the same time, the driver's heart rate and location information are notified to the base station server to prompt the service center staff, so that the staff can dispatch vehicles for timely rescue.

[0004] However, the above-mentioned monitoring and alarm systems lack emergency braking control, and the reaction time to sudden illnesses is often extremely short. Once the driver is unable to slow down and stop in time before losing consciousness, the vehicle will become out of control, greatly increasing the possibility of traffic accidents. Summary of the invention

[0005] The invention provides a safe driving system based on driver heart rate monitoring, aiming to solve the existing problems.

[0006] The present invention is implemented as follows: a safe driving system based on driver heart rate monitoring, the safe driving system based on driver heart rate monitoring comprises: a heart rate monitoring device, a posture detection device and a vehicle-mounted terminal;

[0007] The heart rate monitoring device is used to monitor the driver's heart rate in real time, wherein the heart rate monitoring device includes a Bluetooth module and a vibration module, the Bluetooth module is used to exchange data with the vehicle terminal, and the heart rate monitoring device pre-collects a normal heart rate band H when it is started. 0 The heart rate monitoring device transmits the real-time monitored heart rate data H' to the vehicle terminal through the Bluetooth module every t' seconds; t' is a set time interval, and the vibration module is used to remind the driver through vibration when the driver's heart rate exceeds the normal range;

[0008] The vehicle terminal is used to issue a reminder and perform emergency stop operation when the driver's heart rate is abnormal, wherein the vehicle terminal includes a vehicle Bluetooth module, a microcontroller, an operation panel, a GPS, an alarm module, a communication module and an overspeed reminder module;

[0009] The posture detection device includes two types of detection devices: wearable and non-wearable. The wearable posture detection device is worn on the driver's back and forearm, and the non-wearable posture detection device is an infrared sensor installed in the driving seat. The posture detection device is wirelessly connected to the vehicle-mounted terminal, and the vehicle-mounted terminal pre-sets the normal three-dimensional position range of the driver in a healthy state. When the posture detection device detects that the driver's posture deviates from the normal three-dimensional position range, it sends an emergency signal to the vehicle-mounted terminal, and the operation panel pops up an emergency pop-up window. If the abnormal pop-up window is not closed for 5 seconds, the operation panel sends a "stop" command to the vehicle's braking system.

[0010] Preferably, the heart rate monitoring device is one or more of a heart rate monitoring bracelet worn on the wrist, a heart rate transmitter attached to the chest, and a blood pressure and pulse measuring device worn on the upper arm.

[0011] Preferably, the vehicle-mounted Bluetooth module is used to realize data transmission with the heart rate monitoring device and transmit the received data to the microcontroller.

[0012] Preferably, the microcontroller controls various components of the vehicle-mounted terminal, and the microcontroller detects the pre-collected heart rate band H 0 Analyze and get the normal heart rate range h 1 ~h 2 The preset heart rate threshold is h 3 , and then perform heart rate analysis on the received heart rate data H'. The specific steps are as follows:

[0013] The received heart rate data is filtered using a BLACKMAN window, and the window coefficient formula is:

[0014]

[0015] Where ω(n) is the time domain of the BLACKMAN window function, n is the sequence of filter coefficients, and N is the width of the window;

[0016] The order of BLACKMAN window filtering is L=N+1;

[0017] Construct two fuzzy membership functions:

[0018] The time fuzzy membership function is defined using the Gaussian shape function as:

[0019]

[0020] Among them, τ(t) is the discrete value of signal time; T is the inverse of the heart rate calculated according to Takano C; σ determines the width of the function curve and takes an empirical value

[0021] The amplitude fuzzy membership is defined as:

[0022]

[0023] Where x(t) is the discrete value of the signal amplitude; x max and x min They are the maximum and minimum values ​​of the signal light respectively;

[0024] The comprehensive fuzzy membership is defined as:

[0025] μ=μ Int ×μ Amp

[0026] Based on the comprehensive fuzzy membership, the comprehensive fuzzy membership of each discrete point of the signal is calculated; the heartbeat point is the point with the largest comprehensive fuzzy membership of the signal; the driver's heart rate is obtained by calculating the number of heartbeat points in one minute, and the final heart rate result is recorded as h' and compared with the normal heart rate range and the heart rate critical value of the disease attack. If h 1 <h'≤h 2 , the heart rate is normal; if h 2 <h'<h 3 , the "warning" information is transmitted to the Bluetooth module of the heart rate monitoring device through the vehicle Bluetooth module, and the heart rate monitoring device activates the vibration module to make the heart rate monitoring device vibrate, reminding the driver to pay attention to his own condition and take a rest or contact a doctor in time; if h'≥h 3 or h'<h 1 , the "abnormal" information is transmitted to the alarm module and the communication module is started at the same time.

[0027] Preferably, the operation panel is used to display various data and input the driver's commands, including the information of emergency contacts, and the operation panel is wirelessly connected to the microcontroller, the alarm module and the speeding reminder module.

[0028] Preferably, the GPS is used to locate the position of the vehicle, and when an abnormal heart rate of the driver is detected, the vehicle position data is transmitted to the communication module.

[0029] Preferably, the alarm module includes a voice collection module and a speaker, the driver enters instructions through the voice collection module, and the speaker is used to remind the driver; the alarm module is connected to the vehicle's braking system and lighting control system; when the alarm module receives "abnormal" information, a warning pop-up window pops up on the operation panel, and inquires about the driver's condition through the speaker, and the voice collection module captures the driver's voice; if the speaker asks three times in a row without a response, a "stop" command is sent to the vehicle's braking system to slow down and stop the vehicle, and at the same time, the vehicle's double flash is turned on through the lighting control system to avoid collision with the vehicle behind.

[0030] Preferably, the communication module is used to send the driver's abnormal heart rate information and the vehicle's GPS positioning information to the emergency contact, so that the emergency contact can carry out rescue operations in a timely manner.

[0031] Preferably, the speeding reminder module is used to assist the alarm module to ensure safe driving; when the vehicle is detected to be speeding, the speeding reminder module sends an "overspeeding" message to the operation panel, the operation panel displays an overspeeding pop-up window, and emits a "you are speeding" reminder sound through the speaker; if the vehicle speed gradually drops back to a safe value, the speeding pop-up window closes and the reminder sound stops; if the speeding time t exceeds 3 seconds, an "abnormal" message is sent to the alarm module.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention monitors the driver's heart rate in real time through a heart rate monitoring device. When the heart rate exceeds a normal value but does not reach a critical heart rate value, a microcontroller sends an "early warning" message, and the heart rate monitoring device vibrates to remind the driver to pay attention to his own condition, take a rest or seek medical treatment in time, and provide more preparation time to prevent accidents. When the heart rate exceeds the critical heart rate value, the alarm module pops up a warning pop-up window on the operation panel and inquires about the driver's condition through a loudspeaker. The voice collection module captures the driver's voice. After the loudspeaker asks three times in a row without a response, a "stop" message is sent to the vehicle's brake system to slow down and stop the vehicle. At the same time, the vehicle double flash is turned on through a light control system to avoid collision with the rear vehicle and reduce the possibility of traffic accidents. At the same time, a posture detection device assists the heart rate monitoring device. The normal three-dimensional position range of the posture detection device when the driver is in a healthy state can be set on the vehicle terminal. When the driver is ill, the body will deviate from the normal driving position. When the posture detection device detects that the driver deviates from the normal three-dimensional position range, it sends an emergency signal to the vehicle terminal, and an emergency pop-up window pops up on the operation panel. After the abnormal pop-up window lasts for 5 seconds and no one closes it, a "stop" message is sent to the vehicle's brake system. In addition, the present invention sends the driver's abnormal heart rate information and the vehicle's GPS positioning information to the emergency contact through the communication module after the heart rate is abnormal, so that the emergency contact can carry out rescue treatment in time to avoid delaying the condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 is a block diagram of the entire structure of an embodiment of the present invention;

[0036] Figure 2 is a flow chart of abnormal heart rate detection according to an embodiment of the present invention;

[0037] Figure 3 is a structural block diagram of an alarm module according to an embodiment of the present invention;

[0038] Figure 4 It is a flow chart of the speeding reminder according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further introduced and illustrated in conjunction with specific embodiments below, but is not limited thereto. The technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0040] Example

[0041] refer to Figure 1 ,The safe driving system based on driver heart rate monitoring includes: a heart rate monitoring device, a body posture detection device and a vehicle-mounted terminal;

[0042] The heart rate monitoring device is used to monitor the driver's heart rate in real time, wherein the heart rate monitoring device can be a heart rate monitoring bracelet worn on the wrist or a heart rate transmitter attached to the chest. The heart rate monitoring device includes a Bluetooth module and a vibration module. The Bluetooth module is used to exchange data with the vehicle terminal. The heart rate monitoring device pre-collects a normal heart rate band H when it is started. 0 And it is wirelessly transmitted to the vehicle terminal through the Bluetooth module. Then the heart rate monitoring device transmits a piece of real-time monitored heart rate data H' to the vehicle terminal through the Bluetooth module every t' seconds; where t' is the set time interval, and the vibration module is used to remind the driver through vibration when the driver's heart rate exceeds the normal range.

[0043] The vehicle terminal is used to issue reminders and perform emergency stop operations when the driver's heart rate is abnormal, wherein the vehicle terminal includes a vehicle Bluetooth module, a microcontroller, an operation panel, a GPS, an alarm module, a communication module and a speeding reminder module.

[0044] The posture detection device includes two types of detection devices, wearable and non-wearable. The wearable posture detection device is worn on the driver's back and forearm, and the non-wearable posture detection device is an infrared sensor installed in the driver's seat. The posture detection device is wirelessly connected to the vehicle terminal. The posture detection device assists the heart rate monitoring device. The vehicle terminal can pre-set the normal three-dimensional position range of the driver in a healthy state. The wearable posture detection device uses the center of the driver's seat as the coordinate origin. The driver sets the coordinate points of the posture detection device on the back and forearm during normal driving to (x1, y1, z1) and (x2, y2, z2) respectively. ), the offset of each coordinate point data is less than or equal to 1.5 decimeters and is within the normal range; the non-wearable posture detection device directly scans the driver's real-time posture, and the offset of each part of the real-time posture is less than or equal to 1.5 decimeters and is within the normal range; when the driver is ill, his body will deviate from the normal driving position. When the posture detection device detects that the driver's posture deviates from the normal three-dimensional position range, it sends an emergency signal to the vehicle terminal, and the operation panel of the vehicle terminal pops up an emergency pop-up window. The abnormal pop-up window can be closed manually. If the abnormal pop-up window is not closed for 5 seconds, the operation panel sends a "stop" command to the vehicle's braking system.

[0045] The on-board Bluetooth module is used to exchange data with the heart rate monitoring device and transmit the received data to the microcontroller.

[0046] refer to Figure 2 The microcontroller controls each component of the vehicle terminal, and the microcontroller processes the pre-collected heart rate band H 0 Analyze and get the normal heart rate range h 1 ~h 2 The preset heart rate threshold is h 3 , and then perform heart rate analysis on the received heart rate data H'. The specific steps are as follows:

[0047] The received heart rate data is filtered using a BLACKMAN window, and the window coefficient formula is:

[0048]

[0049] Where ω(n) is the time domain of the BLACKMAN window function, n is the sequence of filter coefficients, and N is the width of the window;

[0050] The order of BLACKMAN window filtering is L=N+1;

[0051] Construct two fuzzy membership functions:

[0052] The time fuzzy membership function is defined using the Gaussian shape function as:

[0053]

[0054] Among them, τ(t) is the discrete value of signal time; T is the inverse of the heart rate calculated according to Takano C; σ determines the width of the function curve and takes an empirical value

[0055] The amplitude fuzzy membership is defined as:

[0056]

[0057] Where x(t) is the discrete value of the signal amplitude; x max and x min They are the maximum and minimum values ​​of the signal light respectively;

[0058] By multiplying the above two-dimensional fuzzy membership functions, the comprehensive fuzzy membership is defined as:

[0059] μ=μ Int ×μ Amp

[0060] Based on the comprehensive fuzzy membership, the comprehensive fuzzy membership of each discrete point of the signal is calculated; the heartbeat point is the point with the largest comprehensive fuzzy membership of the signal; the driver's heart rate is obtained by calculating the number of heartbeat points in one minute.

[0061] The final heart rate is recorded as h' and compared with the normal heart rate range and the heart rate critical value of the disease attack. 1 <h'≤h 2 , the heart rate is normal; if h 2 <h'<h 3 , the "warning" information is transmitted to the Bluetooth module of the heart rate monitoring device through the vehicle Bluetooth module, and the heart rate monitoring device activates the vibration module to make the heart rate monitoring device vibrate, reminding the driver to pay attention to his own condition, take a rest in time or contact a doctor; if h'≥h 3 or h'<h 1 , the "abnormal" information is transmitted to the alarm module and the communication module is started at the same time.

[0062] The operation panel is used to display various data and enter the driver's commands, including the information of emergency contacts. The operation panel is wirelessly connected to the microcontroller, alarm module and speeding reminder module.

[0063] GPS is used to locate the vehicle. When the driver's heart rate is detected to be abnormal, that is, the heart rate h'≥h 3or h'<h 1 , and transmit the vehicle position data to the communication module.

[0064] refer to Figure 3 The alarm module includes a voice collection module and a speaker. The driver enters instructions through the voice collection module, and the speaker is used to remind the driver. The alarm module is connected to the vehicle's braking system and lighting control system. When the alarm module receives "abnormal" information, a warning pop-up window pops up on the operation panel, and asks the driver about his condition through the speaker. The voice collection module captures the driver's voice. If the speaker asks three times in a row without a response, the emergency stop mode is activated, and a "stop" command is sent to the vehicle's braking system to slow down and stop the vehicle. At the same time, the vehicle's double flash is turned on through the lighting control system to avoid collision with the rear vehicle. The warning pop-up window can be closed manually. After closing, the alarm module returns to normal and cancels the warning autonomously, which improves the fault tolerance rate.

[0065] The communication module is used to send the driver's abnormal heart rate information and the vehicle's GPS location information to the emergency contact, so that the emergency contact can carry out rescue in time.

[0066] refer to Figure 4 The speeding reminder module is used to assist the alarm module to ensure safe driving; when the vehicle is detected to be speeding, the speeding reminder module sends an "overspeeding" message to the operation panel, the operation panel displays an overspeeding pop-up window, and emits a reminder sound of "you are speeding" through the speaker; if the vehicle speed gradually drops back to a safe value, the speeding pop-up window is closed, the reminder sound stops, and the speeding pop-up window can be closed manually. After closing, the speeding reminder module returns to normal, which improves the fault tolerance rate; if the speeding time t exceeds 3 seconds, an "abnormal" message is sent to the alarm module.

[0067] The embodiments described above are only part of the embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any ordinary technician in the field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A safe driving system based on driver heart rate monitoring, characterized in that: include: Heart rate monitoring equipment, posture detection devices and vehicle terminals: The heart rate monitoring device is used to monitor the driver's heart rate in real time, wherein the heart rate monitoring device includes a Bluetooth module and a vibration module, the Bluetooth module is used to transmit data with the vehicle terminal, the heart rate monitoring device pre-collects a normal heart rate band H0 when it is started and transmits it to the vehicle terminal wirelessly through the Bluetooth module, and then the heart rate monitoring device transmits the real-time monitored heart rate data H' to the vehicle terminal through the Bluetooth module every t' seconds; wherein t' is a set time interval, and the vibration module is used to remind the driver through vibration when the driver's heart rate exceeds the normal range; The vehicle terminal is used to issue a reminder and perform emergency stop operation when the driver's heart rate is abnormal, wherein the vehicle terminal includes a vehicle Bluetooth module, a microcontroller, an operation panel, a GPS, an alarm module, a communication module and an overspeed reminder module; The posture detection device includes two types of detection devices: wearable and non-wearable. The wearable posture detection device is worn on the driver's back and forearm, and the non-wearable posture detection device is an infrared sensor installed in the driving seat. The posture detection device is wirelessly connected to the vehicle-mounted terminal, and the vehicle-mounted terminal pre-sets the normal three-dimensional position range of the driver in a healthy state. When the posture detection device detects that the driver's posture deviates from the normal three-dimensional position range, it sends an emergency signal to the vehicle-mounted terminal, and the operation panel of the vehicle-mounted terminal pops up an emergency pop-up window. If the abnormal pop-up window is not closed for 5 seconds, the operation panel sends a "stop" command to the vehicle's braking system.

2. The safe driving system based on driver heart rate monitoring according to claim 1, characterized in that: The heart rate monitoring device is one or more of a heart rate monitoring bracelet worn on the wrist, a heart rate transmitter attached to the chest, and a blood pressure and pulse measuring instrument worn on the upper arm.

3. The safe driving system based on driver heart rate monitoring according to claim 1, characterized in that: The vehicle-mounted Bluetooth module is used to realize data transmission with the heart rate monitoring device and transmit the received data to the microcontroller.

4. The safe driving system based on driver heart rate monitoring according to claim 1, characterized in that: The microcontroller controls various components of the vehicle terminal. The microcontroller analyzes the pre-collected heart rate band H0 to obtain a normal heart rate range of h1-h2, and the preset heart rate critical value is h3. Then, the received heart rate data H' is analyzed. The specific steps are as follows: The received heart rate data is filtered using a BLACKMAN window, and the window coefficient formula is: Wherein, ω(n) is the time domain of the BLACKMAN window function, n is the sequence of filter coefficients, and N is the width of the window; the order of the BLACKMAN window filter is L=N+1; Construct two fuzzy membership functions: The time fuzzy membership function is defined using the Gaussian shape function as: Among them, τ(t) is the discrete value of signal time; T is the inverse of the heart rate calculated by TakanoC; σ determines the width of the function curve and takes an empirical value The amplitude fuzzy membership is defined as: Where x(t) is the discrete value of the signal amplitude; x max and x min They are the maximum and minimum values ​​of the signal light respectively; The comprehensive fuzzy membership is defined as: μ=μ Int ×m Amp Based on the comprehensive fuzzy membership, the comprehensive fuzzy membership of each discrete point of the signal is calculated; the heartbeat point is the point with the largest comprehensive fuzzy membership of the signal; the driver's heart rate is obtained by calculating the number of heartbeat points in one minute, and the final heart rate result is recorded as h' and compared with the normal heart rate range and the heart rate critical value of the disease attack. If h1<h'≤h2, the heart rate is normal; if h2<h'<h3, the "early warning" information is transmitted to the Bluetooth module of the heart rate monitoring device through the vehicle-mounted Bluetooth module, and the heart rate monitoring device starts the vibration module, causing the heart rate monitoring device to vibrate, reminding the driver to pay attention to his own condition, take a rest in time or contact a doctor; if h'≥h3 or h'<h1, the "abnormal" information is transmitted to the alarm module, and the communication module is started at the same time.

5. The safe driving system based on driver heart rate monitoring as claimed in claim 1, characterized in that: The operation panel is used to display various data and input the driver's commands, including the information of emergency contacts. The operation panel is wirelessly connected with the microcontroller, the alarm module and the speeding reminder module.

6. The safe driving system based on driver heart rate monitoring as claimed in claim 1, characterized in that: The GPS is used to locate the position of the vehicle, and when an abnormal heart rate of the driver is detected, the vehicle position data is transmitted to the communication module.

7. The safe driving system based on driver heart rate monitoring as claimed in claim 1, characterized in that: The alarm module includes a voice collection module and a speaker. The driver enters instructions through the voice collection module, and the speaker is used to remind the driver. The alarm module is connected to the vehicle's braking system and lighting control system. When the alarm module receives "abnormal" information, a warning pop-up window pops up on the operation panel, and asks the driver about his condition through the speaker. The voice collection module captures the driver's voice. If the speaker asks three times in a row without a response, a "stop" command is sent to the vehicle's braking system to slow down and stop the vehicle. At the same time, the vehicle's double flash is turned on through the lighting control system to avoid collision with the vehicle behind.

8. The safe driving system based on driver heart rate monitoring as claimed in claim 1, characterized in that: The communication module is used to send the driver's abnormal heart rate information and the vehicle's GPS positioning information to the emergency contact, so that the emergency contact can carry out rescue operations in a timely manner.

9. The safe driving system based on driver heart rate monitoring as claimed in claim 1, characterized in that: The speeding reminder module is used to assist the alarm module to ensure safe driving; when the vehicle is detected to be speeding, the speeding reminder module sends an "overspeed" message to the operation panel, the operation panel displays an overspeed pop-up window, and sends a "you are speeding" reminder sound through the speaker; If the vehicle speed gradually drops back to a safe value, the speeding pop-up window will be closed and the reminder sound will stop; if the speeding time t exceeds 3 seconds, an "abnormal" message will be sent to the alarm module.

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