CN219154434U

CN219154434U - In-car safety prevention and control system based on single chip microcomputer

Info

Publication number: CN219154434U
Application number: CN202221733792.XU
Authority: CN
Inventors: 郑婕; 陈迎春; 肖莉萌; 吴亚楠; 张创迪; 陈莉明; 冯劲松
Original assignee: Leshan Normal University
Current assignee: Leshan Normal University
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2023-06-09
Anticipated expiration: 2032-07-06

Abstract

The utility model discloses an in-vehicle safety prevention and control system based on a singlechip, which comprises a singlechip control module, a vehicle flameout detection module, a carbon dioxide detection module, a temperature acquisition module, a human body detection module and a wireless communication module, wherein the singlechip control module is used for controlling the vehicle flameout detection module to stop the vehicle; the singlechip control module is respectively connected with the vehicle flameout detection module, the carbon dioxide detection module, the temperature acquisition module, the human body detection module and the wireless communication module; the in-car safety prevention and control system based on the singlechip can detect whether personnel are locked in the car by mistake, and send data to the mobile terminal through the wireless communication module, the mobile terminal can display the concentration and the temperature of carbon dioxide in the car and the information of whether the personnel exist, the in-car condition can be monitored, and the car owner can be reminded of timely processing when the personnel exist in the car.

Description

In-car safety prevention and control system based on single chip microcomputer

Technical Field

The utility model belongs to the technical field of intelligent vehicle-mounted technology, and particularly relates to an in-vehicle safety prevention and control system based on a single chip microcomputer.

Background

With the rapid development of economy and the continuous improvement of industrial level, more and more families start to own their own automobiles, but accidents that leave children or pets in the automobiles and cause death of the children or pets often occur due to carelessness of the personnel on the automobiles, closure of the automobiles and high or low temperature of the external environment. When the temperature outside the vehicle reaches 35 ℃, the vehicle is not shielded and irradiated by sunlight for 15 minutes, and the temperature in the closed vehicle can be raised to 65 ℃. At this temperature, adults are life threatening for more than half an hour, and infants are much weaker than adults and face more threatening deaths. People, animals, etc. left in the vehicle after the door is locked may be threatened to life safety against the above-mentioned high temperature or other dangers such as fire, oxygen deficiency caused by an increase in the CO2 concentration in the vehicle.

Disclosure of Invention

Aiming at the defects in the prior art, the in-car safety prevention and control system based on the singlechip solves the problem that personnel are injured by being locked in a car by mistake.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme: an in-car safety prevention and control system based on a singlechip comprises a singlechip control module, a vehicle flameout detection module, a carbon dioxide detection module, a temperature acquisition module, a human body detection module and a wireless communication module; the singlechip control module is respectively connected with the vehicle flameout detection module, the carbon dioxide detection module, the temperature acquisition module, the human body detection module and the wireless communication module;

the vehicle flameout detection module comprises a voltage detection sub-module and a Hall proximity switch, and the voltage detection sub-module and the Hall proximity switch are connected with the singlechip control module.

Further: the singlechip control module is provided with a singlechip chip U1, and the model of the singlechip chip U1 is specifically STC89C52.

Further: the Hall proximity switch is arranged on a vehicle column of the vehicle;

the voltage detection submodule comprises a voltage detection probe, a signal amplifying circuit and an analog-to-digital conversion device which are connected in sequence; the voltage detection probe is arranged at a cigar lighter port of the vehicle, and the analog-digital conversion device is also connected with the singlechip control module.

Further: the signal amplifying circuit comprises an operational amplifier U2, an operational amplifier U3, a grounding resistor R1, a resistor R2, a grounding resistor R3 and a resistor R4; the model of the operational amplifier U2 and the model of the operational amplifier U3 are LM358;

the pin 3 of the operational amplifier U2 is connected with the output ends of the grounding resistor R1 and the voltage detection probe respectively, the pin 2 of the operational amplifier U2 is connected with the pin 1 of the operational amplifier U2 and one end of the resistor R2 respectively, the other end of the resistor R2 is connected with the grounding resistor R3 and the pin 5 of the operational amplifier U3 respectively, the pin 4 of the operational amplifier U3 is grounded, the pin 6 of the operational amplifier U3 is connected with the pin 7 of the operational amplifier U3 through the resistor R4, and the pin 8 of the operational amplifier U3 is connected with a VCC power supply.

Further: the analog-digital conversion device is specifically an AD converter U4, and the model of the AD converter U4 is specifically ADC0804;

the No. 6 pin of the AD converter U4 is connected with the No. 7 pin of the operational amplifier U3, and the No. 18 to No. 11 pins of the AD converter U4 are respectively connected with the No. 21 to No. 28 pins of the singlechip chip U1 in a one-to-one correspondence manner.

Further: the carbon dioxide detection module is provided with a carbon dioxide sensor, and the model of the carbon dioxide sensor is TGS4160CO2; the carbon dioxide sensor is connected with the singlechip chip U1.

Further: the temperature acquisition module is provided with a temperature sensor, and the model of the temperature sensor U5 is DS18B20;

and the output end of the temperature sensor U5 is connected with the No. 8 pin of the singlechip chip U1.

Further: the model of the wireless communication module U6 is specifically SIM900A;

and pins No. 9 and No. 10 of the wireless communication module U6 are respectively connected with pins No. 10 and No. 11 of the singlechip chip U1 in a one-to-one correspondence manner.

Further: the human body detection module is provided with a pyroelectric infrared sensor, and the model of the pyroelectric infrared sensor is HC-SR501;

the output end of the pyroelectric infrared sensor is connected with the No. 7 pin of the singlechip chip U1.

The beneficial effects of the utility model are as follows: the in-car safety prevention and control system based on the singlechip can detect whether personnel are locked in the car by mistake, and send data to the mobile terminal through the wireless communication module, the mobile terminal can display the concentration and the temperature of carbon dioxide in the car and the information of whether the personnel exist, the in-car condition can be monitored, and the car owner can be reminded of timely processing when the personnel exist in the car.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a diagram of a chip pin of a monolithic chip according to the present utility model.

Fig. 3 is a schematic diagram of a signal amplifying circuit according to the present utility model.

Fig. 4 is a pin diagram of the AD converter of the present utility model.

Fig. 5 is a pin diagram of a wireless communication module according to the present utility model.

Detailed Description

The following description of the embodiments of the present utility model is provided to facilitate understanding of the present utility model by those skilled in the art, but it should be understood that the present utility model is not limited to the scope of the embodiments, and all the utility models which make use of the inventive concept are protected by the spirit and scope of the present utility model as defined and defined in the appended claims to those skilled in the art.

Example 1:

as shown in fig. 1, in one embodiment of the present utility model, an in-vehicle safety prevention and control system based on a single-chip microcomputer includes a single-chip microcomputer control module, a vehicle flameout detection module, a carbon dioxide detection module, a temperature acquisition module, a human body detection module, and a wireless communication module; the singlechip control module is respectively connected with the vehicle flameout detection module, the carbon dioxide detection module, the temperature acquisition module, the human body detection module and the wireless communication module;

The vehicle flameout detection module is used for detecting whether the vehicle flameout, the carbon dioxide detection module is used for detecting the concentration of carbon dioxide in the vehicle, the temperature acquisition module is used for detecting the temperature in the vehicle, the human body detection module is used for detecting whether someone is in the vehicle, the singlechip control module is used for collecting signals of the vehicle flameout detection module, the carbon dioxide detection module, the temperature acquisition module and the human body detection module, the wireless communication module is used for controlling the air conditioner operation of the vehicle, the wireless communication module is used for sending data collected by the singlechip control module to the mobile terminal, and the mobile terminal monitors the concentration, the temperature and the someone of the carbon dioxide in the vehicle in real time.

As shown in fig. 2, the single-chip microcomputer control module is provided with a single-chip microcomputer chip U1, and the model of the single-chip microcomputer chip U1 is specifically STC89C52.

The STC89C52 singlechip is a high-speed, low-power-consumption and strong anti-interference singlechip.

The Hall proximity switch is arranged on a vehicle column of the vehicle; the Hall proximity switch is a magnetic proximity switch, and when the car door is closed, a magnet on the car door is close to an inductor on the car pillar, so that a car door closing signal is triggered and generated and sent to the singlechip.

In this embodiment, the pillars of the vehicle include an a pillar, which is a pillar between the front windshield and the front door of the vehicle, a B pillar, which is a pillar between the front and rear doors, and a C pillar, which is a pillar between the rear door and the rear windshield.

As shown in fig. 3, the signal amplifying circuit includes an operational amplifier U2, an operational amplifier U3, a ground resistor R1, a resistor R2, a ground resistor R3, and a resistor R4; the model of the operational amplifier U2 and the model of the operational amplifier U3 are LM358;

The analog-digital conversion device is specifically an AD converter U4, and the model of the AD converter U4 is specifically ADC0804;

as shown in fig. 4, pins No. 6 of the AD converter U4 are connected with pins No. 7 of the operational amplifier U3, and pins No. 18 to No. 11 of the AD converter U4 are respectively connected with pins No. 21 to No. 28 of the single chip microcomputer U1 in a one-to-one correspondence.

The carbon dioxide detection module is provided with a carbon dioxide sensor, and the model of the carbon dioxide sensor is TGS4160CO2; the carbon dioxide sensor is connected with the singlechip chip U1.

The temperature acquisition module is provided with a temperature sensor, and the model of the temperature sensor U5 is DS18B20;

As shown in fig. 5, the model of the wireless communication module U6 is specifically SIM900A;

The human body detection module is provided with a pyroelectric infrared sensor, and the model of the pyroelectric infrared sensor is HC-SR501;

The top of the sensor among carbon dioxide detection module, temperature acquisition module and human detection module all is provided with the window of taking the filter, can absorb the infrared radiation beyond the human body, reduces pyroelectric infrared sensor and is disturbed by other infrared radiation when detecting human radiation.

In this embodiment, an audible and visual alarm module and a ventilation module are both connected with the single-chip microcomputer chip U1, the audible and visual alarm module uses a piezoelectric buzzer with a casing provided with a light emitting diode, the audible and visual alarm signals give attention to people around the vehicle, the ventilation module is provided with a stepper motor, and the single-chip microcomputer generates a vehicle window control signal to control the stepper motor of the vehicle window, open the vehicle window and ventilate the vehicle.

The working process of the utility model is as follows: when the vehicle flameout detection module detects that the vehicle flameout, the singlechip control module controls the carbon dioxide detection module, the temperature acquisition module and the human body detection module to start, and when the detection time exceeds 10 minutes or no person is in the vehicle, the carbon dioxide detection module, the temperature acquisition module and the human body detection module are automatically closed. When detecting personnel in the car, real-time supervision carries out, and singlechip control module sends the information of gathering to the mobile terminal through wireless communication module, in time reminds the car owner to handle, and when temperature acquisition module detected temperature exceeded 33 degrees or was less than 14 degrees, singlechip control module controlled air conditioner work in the car, in time changed the temperature in the car to the normal temperature of setting, and when carbon dioxide detection module detected that carbon dioxide concentration exceeded the threshold value in the car, the air conditioner work in the control car reduced carbon dioxide concentration in the car.

In the description of the present utility model, it should be understood that the terms "center," "thickness," "upper," "lower," "horizontal," "top," "bottom," "inner," "outer," "radial," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be interpreted as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defined as "first," "second," "third," or the like, may explicitly or implicitly include one or more such feature.

Claims

1. The in-vehicle safety prevention and control system based on the singlechip is characterized by comprising a singlechip control module, a vehicle flameout detection module, a carbon dioxide detection module, a temperature acquisition module, a human body detection module and a wireless communication module; the singlechip control module is respectively connected with the vehicle flameout detection module, the carbon dioxide detection module, the temperature acquisition module, the human body detection module and the wireless communication module;

the vehicle flameout detection module comprises a voltage detection sub-module and a Hall proximity switch, and the voltage detection sub-module and the Hall proximity switch are connected with the singlechip control module;

the single-chip microcomputer control module is provided with a single-chip microcomputer chip U1, and the model of the single-chip microcomputer chip U1 is specifically STC89C52;

the Hall proximity switch is arranged on a vehicle column of the vehicle;

the voltage detection submodule comprises a voltage detection probe, a signal amplifying circuit and an analog-to-digital conversion device which are connected in sequence; the voltage detection probe is arranged at a cigar lighter port of the vehicle, and the analog-to-digital conversion device is also connected with the singlechip control module;

the signal amplifying circuit comprises an operational amplifier U2, an operational amplifier U3, a grounding resistor R1, a resistor R2, a grounding resistor R3 and a resistor R4; the model of the operational amplifier U2 and the model of the operational amplifier U3 are LM358;

2. The single-chip microcomputer-based vehicle interior safety prevention and control system according to claim 1, wherein the analog-to-digital conversion device is specifically an AD converter U4, and the model of the AD converter U4 is specifically ADC0804;

3. The single-chip microcomputer-based vehicle interior safety prevention and control system according to claim 1, wherein the carbon dioxide detection module is provided with a carbon dioxide sensor, and the model of the carbon dioxide sensor is TGS4160CO2; the carbon dioxide sensor is connected with the singlechip chip U1.

4. The single-chip microcomputer-based vehicle interior safety prevention and control system according to claim 1, wherein the temperature acquisition module is provided with a temperature sensor, and the model of the temperature sensor U5 is DS18B20;

5. The in-vehicle safety prevention and control system based on a single chip microcomputer according to claim 1, wherein the model of the wireless communication module U6 is specifically SIM900A;

6. The single-chip microcomputer-based vehicle interior safety prevention and control system according to claim 1, wherein the human body detection module is provided with a pyroelectric infrared sensor, and the model of the pyroelectric infrared sensor is HC-SR501;