Zigbee-based vehicle-mounted anti-retention monitoring system for children

Abstract

The invention relates to the technical field of communication technology and sensing technology application, and discloses a Zigbee-based vehicle-mounted child retention prevention monitoring system which is composed of a vehicle body state detection module, a human body induction detection module, a child physiology detection module, an in-vehicle environment detection module and an emergency measure module. The running state of an automobile is monitored in real time, the flameout state is particularly concerned, preconditions are provided for child monitoring, whether passengers stay in the automobile or not is detected through the high-frequency microwave technology, the breathing and heartbeat signals are monitored, life activities are accurately recognized, false alarms caused by toys or other objects are avoided, meanwhile, the image sensor is adopted, and the safety of children is improved. Through the face recognition technology, whether the passenger identity is a child or not is accurately recognized, the accuracy of child retention detection is ensured, and the beneficial effects that the event that the child is retained in the vehicle is found in time and a correct response is made are achieved.

Description

Technical Field

[0001] The present invention relates to the field of communication technology and sensor technology application technology, and specifically to a Zigbee-based vehicle-mounted child anti-detention monitoring system. Background Art

[0002] At present, at least more than 300 children around the world have died from being left alone in cars intentionally or unintentionally. One such death occurs every 10 days in the United States, and there are also various reports in China every year about children being forgotten in private cars or school buses, resulting in accidental deaths.

[0003] Human monitoring alone cannot provide comprehensive, all-weather safety protection. Child Presence Detection (CPD) systems have emerged as a key feature of in-cabin sensing technology (ICS). CPD, a fundamental function within in-cabin sensing technology (ICS), has been a research hotspot in the automotive industry in recent years. It primarily detects whether children are left behind in the back seat when the vehicle's ignition is off, thereby preventing the serious consequences of child entrapment in hot weather. CPD prevents entrapment by installing life-detection sensors, such as infrared, radar, and microwave. However, most CPD solutions rely solely on the driver leaving their seat as a trigger, ignoring the possibility that children could become trapped in the vehicle due to their own behavior. Children, as trapped individuals, have physiological data that directly correlates to the severity of an incident and therefore require real-time monitoring. However, most systems focus solely on vehicle data, ignoring child data. Most Chinese families do not install child seats, and children cannot be kept wearing seatbelts at all times while driving. Therefore, single sensors often fail to account for children's freedom and mobility, resulting in blind spots and, in practice, inability to accurately detect child entrapment. Some systems rely entirely on vehicle power, lacking their own independence and sustainability. When the car is turned off, the vehicle is in a power-off state and the system cannot operate. Summary of the Invention

[0004] Technical issues solved:

[0005] In response to the shortcomings of the existing technology, the present invention provides a Zigbee-based in-vehicle child anti-detention monitoring system, which has the advantages of promptly detecting incidents of children being detained in the car and making correct responses; helping guardians to check for deficiencies and fill gaps, saving children's lives, etc., thereby solving the problems of the above-mentioned technology.

[0006] Technical solution:

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a Zigbee-based vehicle-mounted child anti-detention monitoring system, the monitoring system comprising a vehicle state detection module, a human body sensing detection module, a child physiological detection module, an in-vehicle environment detection module, and an emergency measures module;

[0008] The vehicle status detection module is used to monitor the vehicle's operating status, including determining whether the vehicle is moving, paused, or turned off, and transmits vehicle status information to the system control unit in real time, paying particular attention to the "turned off" state to provide a prerequisite for subsequent child monitoring;

[0009] The human body sensing detection module is used to detect whether there is a child in the car; the human body sensing module is based on the comprehensive judgment of the results of the microwave sensor and the image sensor. The microwave sensor judges whether there is life, and the image sensor judges whether the life is a child.

[0010] The child physiological detection module is used to monitor the health status of children and evaluate whether there are any abnormalities through physiological indicators; monitor the child's body temperature in real time to ensure that it is within the normal range of 36-38°C. If the body temperature exceeds or falls below the set threshold, an alarm will be triggered; monitor the child's heart rate and identify abnormalities: if the heart rate is less than 60 beats / min or greater than 100 beats / min, data will be collected through wearable devices: wrist;

[0011] The in-car environment detection module is used to monitor in-car environmental parameters, including temperature, formaldehyde concentration and humidity, to ensure that the in-car environment is suitable for children. The temperature sensor is used to measure the in-car temperature in real time, and the threshold is set to be less than 10°C or greater than 30°C. If it exceeds the range, an alarm will be activated. The formaldehyde concentration in the car is measured to ensure that the concentration does not exceed 100mg / m 3 ; Monitor relative humidity, the normal range is set to 30%RH-60%RH, exceeding this range will trigger an alarm;

[0012] The emergency measures module is used to quickly respond and implement emergency measures when a child is stranded or an abnormal condition is detected. When an abnormality is detected in the child's physiology or environment, the fan in the car is automatically started to accelerate air circulation and reduce the temperature. The alarm information is sent to the user's mobile phone in real time through the GSM module, and the buzzer is triggered to sound to attract the attention of passers-by and seek external help. Through the mobile phone application, the user can view the in-car environment and the child's physiological data in real time to keep abreast of the situation.

[0013] Preferably, the real-time transmission status message expression in the vehicle state detection module is:

[0014]

[0015] Among them: TX = 1 means driving; TX = -1 means the car is turned off; TX = 0 means the car is in the stopped state; V threshold is the vehicle speed threshold; S threshold The threshold value for the shock sensor reading.

[0016] Preferably, the real-time transmission status information expression in the vehicle state detection module is:

[0017] Transfer state = f(T)

[0018] Where: f(T) represents the function that transfers the state result T to the control unit.

[0019] Preferably, the expression for determining whether there is life in the human body sensing detection module is:

[0020] P detected =P alive ∧P child

[0021] Among them, P detected Indicates the final detection result of "there is a child in the car": If P detected =1, it means there is indeed a child in the car; if P detected =0, it means there is no child in the car; P alive The probability of "life" detected by the microwave sensor: 0 means no life, 1 means life; P child The probability of "child" detected by the image sensor: 0 indicates non-child, 1 indicates child;

[0022] The expression used by the human body sensing detection module to determine whether there is a child in the car is:

[0023]

[0024] Where: R is the intensity of the respiratory signal; TT is the detection result, where: TT = 1 means a child is detected; TT = 0 means no child is detected; R threshold The threshold for judging the respiratory signal.

[0025] Preferably, in order to avoid false alarms, the vehicle state detection module introduces a distinction between object and life signals:

[0026]

[0027] Where: O represents the signal strength of other objects detected; O threshold is the threshold for judging object signals.

[0028] Preferably, the abnormal body temperature judgment condition expression in the physiological detection module is:

[0029]

[0030] Where: T high =38, T low =36, Temp represents body temperature variable.

[0031] Preferably, the abnormal heart rate judgment condition expression is:

[0032]

[0033] Where: R low =60, R high =100, R is the heart rate variable, and S(R) is the function that encodes the heart rate detection result.

[0034] Preferably, the in-vehicle environment detection module is expressed as:

[0035]

[0036] Where: Suitability = 1 means the car interior environment is suitable for children; Suitability = 0 means the car interior environment is not suitable for children; variable T represents the temperature inside the car, C HCHO represents formaldehyde concentration, and H represents humidity.

[0037] Preferably, the expression for automatically starting the fan in the emergency measures module is:

[0038]

[0039] Where: Tw is temperature, V 熄火 Is the vehicle turned off: true / false, C 儿童 Is there any child left: True / False.

[0040] Preferably, the real-time monitoring expression in the emergency measures module is:

[0041] Real-time data = {T,H,C HCHO , fan status, alarm information, children's physiological data}

[0042] Where H represents humidity.

[0043] Compared with the existing technology, the present invention provides a Zigbee-based vehicle-mounted child anti-detention monitoring system with the following beneficial effects:

[0044] 1. The present invention provides a prerequisite for child monitoring by monitoring the operating status of the vehicle in real time, paying special attention to the "off" state. It uses high-frequency microwave technology to detect whether there are any living organisms in the vehicle. By monitoring breathing and heartbeat signals, it accurately identifies life activities and avoids false alarms caused by toys or other objects. It also uses image sensors to further perform facial recognition on living organisms and identify the age of passengers, ensuring the accuracy of child detention detection. It monitors the child's body temperature and heart rate in real time to ensure the child's health status. If an abnormality is detected, such as excessively high or low body temperature or abnormal heart rate, the system will immediately respond and issue an alarm. It continuously monitors the vehicle's environmental parameters, such as temperature, formaldehyde concentration, and humidity, to ensure a suitable environment. If any unsuitable environmental conditions are detected, an alarm will be triggered to alert parents. When physiological or environmental abnormalities are detected in the child, the system will automatically start the vehicle fan to increase air circulation, thereby reducing the temperature. The alarm information will be sent to the user's mobile phone in real time via the GSM module and a buzzer will be triggered to attract the attention of passers-by and seek external help. This automated response mechanism reduces delays caused by human negligence and ensures that emergencies are handled quickly and effectively. Users can view the in-car environment and children's physiological data in real time through mobile phone applications, and keep abreast of the children's status and in-car environment at any time. Real-time monitoring not only provides parents with a sense of security, but also allows immediate intervention when anomalies occur, achieving the beneficial effect of promptly discovering incidents of children being stranded in cars and making correct responses.

[0045] 2. The present invention provides a prerequisite for child monitoring by monitoring the operating status of the car in real time through the system, paying special attention to the "engine off" state, and adopts high-frequency microwave technology to detect whether there are passengers stranded in the car. By monitoring breathing and heartbeat signals, life activities are accurately identified, avoiding false alarms caused by toys or other objects. At the same time, image sensors are used to accurately identify whether the passenger is a child through face recognition technology, ensuring the accuracy of child detention detection. High-precision physiological monitoring technology reduces the possibility of false alarms, allowing guardians to respond quickly. The in-car environment detection module monitors temperature, humidity and formaldehyde concentration. When the environmental parameters exceed the safety threshold, the system will immediately issue an alarm to remind the guardian to take appropriate measures to prevent health problems caused by environmental discomfort, thereby achieving the beneficial effect of checking for deficiencies and filling gaps for guardians and saving children's lives. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Schematic diagram of the system of the present invention; DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] See also Figure 1 The Zigbee-based vehicle-mounted child anti-detention monitoring system consists of a vehicle status detection module, a human body sensing detection module, a child physiological detection module, an in-vehicle environment detection module, and an emergency measures module.

[0049] The vehicle status detection module monitors the vehicle's operating status, including determining whether the vehicle is moving, paused, or off. It transmits this information to the system control unit in real time, paying particular attention to the "off" status, which provides a prerequisite for subsequent child monitoring.

[0050] The human body sensing detection module is used to detect whether there are children in the car. The human body sensing module uses the results of two parts: microwave sensor and image sensor to comprehensively judge whether there is a living body, and image sensor to judge whether the living body is a child.

[0051] The child physiological detection module is used to monitor the health status of children and assess whether there are any abnormalities through physiological indicators. It monitors the child's body temperature in real time to ensure that it is within the normal range of 36-38°C. If the body temperature exceeds or falls below the set threshold, an alarm will be triggered. It also monitors the child's heart rate and identifies abnormalities: heart rate less than 60 beats / min or greater than 100 beats / min, and collects data through wearable devices: wrist wearables.

[0052] The in-car environment detection module is used to monitor in-car environmental parameters, including temperature, formaldehyde concentration and humidity, to ensure that the in-car environment is suitable for children. It uses a temperature sensor to measure the in-car temperature in real time and sets a threshold value of less than 10°C or greater than 30°C. If it exceeds the range, an alarm will be activated. The formaldehyde concentration in the car is measured to ensure that the concentration does not exceed 100mg / m 3 ; Monitor relative humidity, the normal range is set to 30%RH-60%RH, exceeding this range will trigger an alarm;

[0053] The emergency measures module is used to quickly respond and implement emergency measures when a child is stranded or an abnormal condition is detected. When an abnormality is detected in the child's physiology or environment, the fan in the car is automatically started to accelerate air circulation and reduce the temperature. The alarm information is sent to the user's mobile phone in real time through the GSM module, and the buzzer is triggered to sound to attract the attention of passers-by and seek external help. Through the mobile phone application, the user can view the in-car environment and the child's physiological data in real time to keep abreast of the situation.

[0054] By real-time monitoring of the vehicle's operating status, with special attention to the "stall" status, it provides the prerequisites for child monitoring. It uses high-frequency microwave technology to detect whether there are passengers trapped in the car. By monitoring breathing and heartbeat signals, it accurately identifies life activities and avoids false alarms caused by toys or other objects. At the same time, it uses image sensors and face recognition technology to accurately identify whether the passenger is a child, ensuring the accuracy of child detention detection. It monitors the child's body temperature and heart rate in real time to ensure the child's health status. If an abnormality is detected, such as high or low body temperature or abnormal heart rate, the system will respond immediately and issue an alarm. It continuously monitors the vehicle's environmental parameters: temperature, formaldehyde concentration and humidity to ensure the environment is suitable. If any unsuitable environmental conditions are detected, an alarm will be triggered to alert parents. When physiological or environmental abnormalities of the child are detected, the system will automatically start the vehicle fan to increase air circulation, thereby lowering the temperature. The alarm information will be sent to the user's mobile phone in real time through the GSM module, and a buzzer will be triggered to attract the attention of passers-by and seek external help. This automated response mechanism reduces delays caused by human negligence and ensures that emergencies are handled quickly and effectively. Users can view the in-car environment and children's physiological data in real time through mobile phone applications, and keep abreast of the children's status and in-car environment at any time. Real-time monitoring not only provides parents with a sense of security, but also allows immediate intervention when abnormalities occur.

[0055] Specifically, the real-time transmission status message expression in the vehicle status detection module is:

[0056]

[0057] Among them: TX = 1 means driving; TX = -1 means the car is turned off; TX = 0 means the car is in the stopped state; V threshold is the vehicle speed threshold; S threshold The threshold value for the shock sensor reading.

[0058] Specifically, the expression for real-time transmission of status information in the vehicle status detection module is:

[0059] Transfer state = f(T)

[0060] Where: f(T) represents the function that transfers the state result T to the control unit.

[0061] Specifically, the expression for determining whether there is life in the human body sensing detection module is:

[0062] P detected =P alive ∧P child

[0063] Among them, P detected Indicates the final detection result of "there is a child in the car": If Pdetected =1, it means there is indeed a child in the car; if P detected =0, it means there is no child in the car; P alive The probability of "life" detected by the microwave sensor: 0 means no life, 1 means life; P child The probability of "child" detected by the image sensor: 0 indicates non-child, 1 indicates child;

[0064] The expression for judging whether there is a child in the car in the human body sensing detection module is:

[0065]

[0066] Where: R is the intensity of the respiratory signal; TT is the detection result, where: TT = 1 means a child is detected; TT = 0 means no child is detected; R threshold The threshold for judging the respiratory signal.

[0067] Specifically, in order to avoid false alarms, the vehicle status detection module introduces the distinction between object and life signals:

[0068]

[0069] Where: O represents the signal strength of other objects detected; O threshold is the threshold for judging object signals.

[0070] Specifically, the conditional expression for determining abnormal body temperature in the physiological detection module is:

[0071]

[0072] Where: T high =38, T low =36, Temp represents body temperature variable.

[0073] Specifically, the conditional expression for determining abnormal heart rate is:

[0074]

[0075] Where: R low =60, R high =100, R is the heart rate variable, and S(R) is the function that encodes the heart rate detection result.

[0076] Specifically, the expression of the in-vehicle environment detection module is:

[0077]

[0078] Where: Suitability = 1 means the car interior environment is suitable for children; Suitability = 0 means the car interior environment is not suitable for children; variable T represents the temperature inside the car, CHCHO represents formaldehyde concentration, and H represents humidity.

[0079] Specifically, the expression for automatically starting the fan in the emergency measures module is:

[0080]

[0081] Where: Tw is temperature, V 熄火 Is the vehicle turned off: true / false, C 儿童 Is there any child left: True / False.

[0082] Specifically, the real-time monitoring expression in the emergency measures module is:

[0083] Real-time data = {T,H,C HCHO , fan status, alarm information, children's physiological data}

[0084] Where H represents humidity.

[0085] The system provides comprehensive and real-time information through multiple modules such as vehicle status detection, human body sensing, child physiological indicator monitoring and environmental factor detection. All-round monitoring can effectively identify potential problems and promptly discover child detention caused by negligence. High-frequency microwave technology is used to monitor children's physiological signals: breathing and heartbeat to ensure accurate identification of life activities. High-precision physiological monitoring technology reduces the possibility of false alarms, allowing guardians to respond quickly. The in-vehicle environment detection module monitors temperature, humidity and the concentration of harmful substances. When the environmental parameters exceed the safety threshold, the system will immediately issue an alarm to remind the guardian to take appropriate measures to prevent health problems caused by environmental discomfort.

[0086] While embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. The Zigbee-based vehicle-mounted child anti-detention monitoring system is characterized by: The monitoring system is composed of a vehicle state detection module, a human body sensing detection module, a child physiological detection module, an in-vehicle environment detection module and an emergency measures module; The vehicle state detection module is used to monitor the running state of the vehicle, including determining whether the vehicle is running, paused or turned off, and transmits vehicle state information to the system control unit in real time, especially focusing on the "turned off" state, to provide a prerequisite for subsequent child monitoring; The human body sensing detection module is used to detect whether there is a child in the car; The human body sensing module is based on the comprehensive judgment of the microwave sensor and the image sensor. The microwave sensor judges whether there is a living body, and the image sensor judges whether the living body is a child. The child physiological detection module is used to monitor the health status of the child and evaluate whether there is any abnormality through physiological indicators; Monitor the child's body temperature in real time to ensure that it is within the normal range of 36-38°C. If the body temperature exceeds or falls below the set threshold, an alarm will be triggered. Monitor the child's heart rate and identify abnormal conditions: heart rate less than 60 beats / min or greater than 100 beats / min. Collect data through wearable devices: wrist-mounted; The in-car environment detection module is used to monitor in-car environmental parameters, including temperature, formaldehyde concentration and humidity, to ensure that the in-car environment is suitable for children; a temperature sensor is used to measure the in-car temperature in real time, and a threshold is set to be less than 10°C or greater than 30°C. If the threshold is exceeded, an alarm will be activated; the in-car formaldehyde concentration is measured to ensure that the concentration does not exceed 100mg / m 3 ; Monitor relative humidity, the normal range is set to 30%RH-60%RH, exceeding this range will trigger an alarm; The emergency measures module is used to respond quickly and implement emergency measures when a child is stranded or an abnormal condition is detected. When the child's physiological or environmental abnormalities are detected, the fan in the car is automatically started to accelerate air circulation and reduce the temperature. Through the GSM module, the alarm information is sent to the user's mobile phone in real time, and the buzzer is triggered to sound to attract the attention of passers-by and seek external help. Through the mobile phone application, the user can view the in-car environment and the child's physiological data in real time to grasp the situation in a timely manner.

2. The Zigbee-based vehicle-mounted child anti-detention monitoring system according to claim 1 is characterized in that: The vehicle state detection module expression is: Among them: TX = 1 means driving; TX = -1 means the engine is turned off; TX = 0 means the car is in the paused state; V threshold is the vehicle speed threshold; S threshold The threshold value for the shock sensor reading.

3. The Zigbee-based vehicle-mounted child anti-detention monitoring system according to claim 2 is characterized in that: The expression of real-time transmission status information in the vehicle state detection module is: Transfer state = f(T) Where: f(T) represents the function that transfers the state result T to the control unit.

4. The Zigbee-based vehicle-mounted child anti-detention monitoring system according to claim 1 is characterized in that: The expression for judging whether a child is stranded in the human body sensing detection module is: P detected =P alive ∧P child Among them, P detected Indicates the final detection result of "there is a child in the car": if P detected =1, it means there is indeed a child in the car; if P detected =0, it means there is no child in the car; P alive is the probability of "life" detected by the microwave sensor: 0 means no life, 1 means life; P child The probability of "child" detected by the image sensor: 0 indicates non-child, 1 indicates child.

5. The Zigbee-based vehicle-mounted child anti-detention monitoring system according to claim 4 is characterized in that: The expression of real-time transmission status information in the human body sensing detection module is: Transfer state = f(P detected ) Where: f(P detected ) indicates that the sensing result P detected Function passed to the control unit.

6. The Zigbee-based vehicle-mounted child anti-detention monitoring system according to claim 1 is characterized in that: The abnormal body temperature judgment condition expression in the physiological detection module is: Where: T high =38, T low =36, Temp represents body temperature variable.

7. The Zigbee-based vehicle-mounted child anti-detention monitoring system according to claim 1 is characterized in that: The abnormal heart rate judgment condition expression is: Where: R low =60, R high =100, R is the heart rate variable, S(R) is the function that encodes the heart rate detection result.

8. The Zigbee-based vehicle-mounted child anti-detention monitoring system according to claim 1 is characterized in that: The in-vehicle environment detection module expression is: Where: suitability = 1 means the car environment is suitable for children; suitability = 0 means the car environment is not suitable for children; variable T represents the temperature inside the car, C HCHO represents formaldehyde concentration, H represents humidity, T max is the maximum temperature, T min is the minimum temperature, H min and H max is the minimum and maximum humidity, E(T,C HCHO ,H) means outputting the environmental status as a suitability value.

9. The Zigbee-based vehicle-mounted child anti-detention monitoring system according to claim 1 is characterized in that: The expression for automatically starting the fan in the emergency measures module is: Where: Tw is temperature, V 熄火 Is the vehicle turned off: true / false, C 儿童 Is there any child left: True / False.

10. The Zigbee-based vehicle-mounted child anti-detention monitoring system according to claim 1, characterized in that: The real-time monitoring expression in the emergency measures module is: Real-time data = {T,H,C HCHO , fan status, alarm information, children's physiological data}.

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