Airflow starting device for preventing drunk driving of automobile

Abstract

The utility model discloses an automobile drunk driving prevention airflow starting device, which belongs to the technical field of drunk driving prevention equipment and comprises a power supply, an airflow sensor, an alcohol sensor, a control circuit module, an audible and visual alarm and an automobile ignition loop. The airflow sensor and the alcohol sensor are both connected with the signal input end of the control circuit module, and the audible and visual alarm and the automobile ignition loop are both connected with the signal output end of the control circuit module. Alcohol detection and vehicle starting are combined, a driver can start the vehicle only through expiration detection, drunk driving can be effectively prevented, when the driver does not drink, the vehicle can be started through expiration detection, and the use process is more convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of anti-drunk driving equipment, specifically an airflow start device for preventing drunk driving in automobiles. Background Technology

[0002] With my country's economic and social development, the total length of highways, the number of motor vehicles, and the number of drivers nationwide are constantly increasing, leading to a rise in road traffic accidents. Therefore, research into technologies to prevent drunk driving is of great significance.

[0003] Patent No. ZL202123160905X discloses a vehicle-mounted anti-drunk driving device, specifically relating to the technical field of anti-drunk driving devices. It includes a driver's seat headrest body installed on the driver's seat of a car. The headrest body has mounting cavities on both sides, and each cavity houses a drive motor. The output end of each drive motor has a rotating shaft, and one end of the rotating shaft has a reinforcing limiting connecting plate. Through the coordinated use of these components, the device senses weight through a gravity sensor on the driver's seat, causing the reinforcing limiting connecting plate and connecting rod to rotate and displace. This allows an alcohol gas sensor to come into contact with the driver in the driver's seat, detecting alcohol in their breath. Only then can the vehicle be started via the ignition system. While this patent has some feasibility, its complex structural design and anti-drunk driving process limit its widespread application.

[0004] For example, patent number ZL2021222775506 discloses a vehicle-mounted anti-drunk driving monitoring alarm, including a housing, a support plate on the surface of the housing, a plug-in hole on the top surface of the support plate, a mounting block inserted into the plug-in hole, an alcohol sensor vertically mounted on the top surface of the mounting block, a gooseneck tube at the bottom of the housing, a mounting plate at one end of the gooseneck tube, a human infrared sensor mounted on the surface of the mounting plate, a speaker mounted on the surface of the housing, an alarm mounted on the surface of the housing, a display screen above the alarm, and a camera mounted above the display screen. By using the housing, human infrared sensor, mounting block, alcohol sensor, and speaker in combination, it is convenient to detect the driver's alcohol content in the driver's seat. This patent only detects the alcohol content and alarms when a certain value is reached; it does not start the car or lock the vehicle based on the driver's breathalyzer readings. Summary of the Invention

[0005] In view of this, this utility model provides an airflow start device for preventing drunk driving in automobiles, addressing the shortcomings of existing technologies.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a car anti-drunk driving airflow start device, including a power supply, an airflow sensor, an alcohol sensor, a control circuit module, an audible and visual alarm, and a car ignition circuit. The power supply provides power to the entire device. The airflow sensor and the alcohol sensor are both connected to the signal input terminal of the control circuit module. The audible and visual alarm and the car ignition circuit are both connected to the signal output terminal of the control circuit module.

[0007] Furthermore, the power supply includes a positive terminal, a negative terminal, and a voltage regulator chip. The input terminal of the voltage regulator chip is connected to the positive terminal of the power supply, the ground terminal of the voltage regulator chip is connected to the negative terminal of the power supply, and the output terminal of the voltage regulator chip is connected to the upper end of the reset button. The positive terminal of the power supply is connected to the positive terminal of the vehicle power supply, and the negative terminal of the power supply is connected to the negative terminal of the vehicle power supply.

[0008] Furthermore, the control circuit module includes two relays. The lower end of the reset button is connected to the VCC terminal of the airflow sensor and the left end of the normally closed contact J2. The GND terminal of the airflow sensor is connected to the negative terminal of the power supply. The OUT terminal of the airflow sensor is connected to the base of transistor Q1. The right end of the normally closed contact J2 is connected to the left end of relay J1, the cathode of diode D1, the left end of capacitor C1, and the anode of LED D3. The cathode of LED D3 is connected to the left end of current-limiting resistor R1. The right end of relay J1, the anode of diode D1, the right end of capacitor C1, and the right end of current-limiting resistor R1 are connected to the collector of transistor Q1 and the left end of normally open contact J1-1. The emitter of transistor Q1 and the right end of normally open contact J1-1 are connected to the negative terminal of the power supply.

[0009] The lower end of the reset button is connected to the VCC terminal of the alcohol sensor, the left end of the relay J2, the cathode of the diode D2, and the left end of the audible and visual alarm. The GND terminal of the alcohol sensor is connected to the negative terminal of the power supply. The OUT terminal of the alcohol sensor is connected to the base of the transistor Q2. The right end of the relay J2, the anode of the diode D2, and the right end of the audible and visual alarm are connected to the collector of the transistor Q2 and the left end of the normally open contact J2. The emitter of the transistor Q2 and the right end of the normally open contact J2 are connected to the negative terminal of the power supply. The normally open contact J1-2 of the relay J1 is connected to the vehicle ignition circuit.

[0010] Furthermore, the airflow sensor and the alcohol sensor are arranged side by side in the driver's cabin of the vehicle.

[0011] Furthermore, the voltage regulator chip is an LM7805 chip, used to step down the voltage of the car battery to 5V DC.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model of a car anti-drunk driving airflow start device effectively integrates anti-drunk driving technology with one-button start technology. It allows the vehicle to start when the driver has not consumed alcohol, and prevents the vehicle from starting when the driver has consumed alcohol, while simultaneously triggering an audible and visual alarm to alert the driver. This significantly reduces the occurrence of drunk driving. Furthermore, it integrates the alcohol detection and vehicle starting processes, making it more convenient to use. This device is highly practical and has significant potential for widespread application. Attached Figure Description

[0014] Figure 1 This is an electrical schematic diagram of an embodiment of the present utility model;

[0015] Figure 2 This is a circuit diagram of an embodiment of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0017] like Figures 1-2 As shown, a car anti-drunk driving airflow start device includes a power supply, an airflow sensor, an alcohol sensor, a control circuit module, an audible and visual alarm, and a car ignition circuit. The power supply provides power to the entire device. The airflow sensor and the alcohol sensor are both connected to the signal input terminal of the control circuit module, and the audible and visual alarm and the car ignition circuit are both connected to the signal output terminal of the control circuit module.

[0018] Specifically, the power supply includes a positive terminal, a negative terminal, and an LM7805 voltage regulator chip. The vehicle's own battery is stepped down to 5V DC by the LM7805 voltage regulator chip. The input terminal of the voltage regulator chip is connected to the positive terminal of the power supply, the ground terminal of the voltage regulator chip is connected to the negative terminal, and the output terminal of the voltage regulator chip is connected to the upper end of the reset button. The positive terminal of the power supply is connected to the positive terminal of the vehicle's power supply, and the negative terminal is connected to the negative terminal of the vehicle's power supply. The airflow sensor uses a commercially available sensor module to detect whether someone is blowing air and sends the detection signal to the control circuit. The airflow module has a static current ≤3uA, extremely low power consumption, and digital signal output. It is triggered when the airflow is ≥100pa, outputting a high level when there is no airflow and a low level when there is airflow. The alcohol sensor uses an MQ-3 ethanol sensor module to detect the alcohol content in exhaled breath and sends the detection signal to the control circuit module. It is triggered when the detected content is ≥10ppm (1mg / 100mL), outputting a high level when not triggered and a low level after triggering. The airflow sensor and alcohol sensor are set up in parallel to ensure that the triggering effect of both is the same when the vehicle driver blows into the breath.

[0019] The control circuit module uses two Omron G2R-2 relays (with two sets of contacts) to implement logic control. When the user has not consumed alcohol, the relays connect the ignition circuit nodes and start the vehicle. When the user has consumed alcohol, the relays trigger the audible and visual alarm and simultaneously lock the vehicle's ignition circuit.

[0020] The lower end of the reset button is connected to the VCC terminal of the airflow sensor and the left end of the normally closed contact J2. The GND terminal of the airflow sensor is connected to the negative terminal of the power supply. The OUT terminal of the airflow sensor is connected to the base of transistor Q1. The right end of the normally closed contact J2 is connected to the left end of relay J1, the cathode of diode D1, the left end of capacitor C1, and the anode of LED D3. The cathode of LED D3 is connected to the left end of current-limiting resistor R1. The right end of relay J1, the anode of diode D1, the right end of capacitor C1, and the right end of current-limiting resistor R1 are connected to the collector of transistor Q1 and the left end of normally open contact J1-1. The emitter of transistor Q1 and the right end of normally open contact J1-1 are connected to the negative terminal of the power supply.

[0021] The lower end of the reset button is connected to the VCC terminal of the alcohol sensor, the left end of the relay J2, the cathode of the diode D2, and the left end of the audible and visual alarm. The GND terminal of the alcohol sensor is connected to the negative terminal of the power supply. The OUT terminal of the alcohol sensor is connected to the base of the transistor Q2. The right end of the relay J2, the anode of the diode D2, and the right end of the audible and visual alarm are connected to the collector of the transistor Q2 and the left end of the normally open contact J2. The emitter of the transistor Q2 and the right end of the normally open contact J2 are connected to the negative terminal of the power supply. The normally open contact J1-2 of the relay J1 is connected to the vehicle ignition circuit.

[0022] Working principle of the car anti-drunk driving airflow starter:

[0023] The airflow sensor, normally closed contact J2, relay J1, diode D1, capacitor C1, LED D3, resistor R1, transistor Q1, and normally open contact J1-1 constitute the airflow start control circuit. Diode D1 is a freewheeling diode to prevent the relay J1 coil from being damaged or burned by the induced voltage at the moment of power failure. Capacitor C1 delays the closing of relay J1 (ensuring that relay J2 activates before relay J1 when the breath is exhaled after drinking). LED D3 and current-limiting resistor R1 constitute the vehicle start indicator circuit; D3 illuminating indicates that the vehicle has started.

[0024] The alcohol sensor, relay J2, diode D2, alarm, transistor Q2, and normally open contact J2 constitute the airflow-activated alcohol detection interlocking circuit. Diode D2 is a freewheeling diode to prevent the relay J2 coil from being damaged or burned out by the induced voltage at the moment of power failure.

[0025] The working process of the car's anti-drunk driving airflow starter is as follows:

[0026] 1. In a state of not drinking alcohol

[0027] When the driver enters the vehicle and blows into the airflow sensor and alcohol sensor, the alcohol sensor is not triggered, outputting a high level. Transistor Q2 is not conducting, relay J2 does not activate, and normally open contact J2 does not close, so the alarm does not work. Simultaneously, regardless of whether the driver has consumed alcohol, the airflow sensor is triggered after blowing into the vehicle, outputting a low level. Transistor Q1 conducts, capacitor C1 charges and, after a delay, the coil of relay J1 is energized and reaches its operating voltage. Relay J1 activates, normally open contact J1-1 closes, and relay J1 self-locks (remaining closed after the breath-blowing process ends). Simultaneously, LED D3 illuminates, normally open contact J1-2 closes, the vehicle ignition circuit is connected, and the vehicle starts. Manually pressing the reset button de-energizes the device, relay J1 opens, and the vehicle shuts off.

[0028] II. Under the influence of alcohol

[0029] After the driver gets into the car, they blow into the airflow sensor and alcohol sensor to attempt to start the vehicle. At this time, the alcohol sensor is triggered, outputting a low level, transistor Q2 conducts, relay J2 activates, and the normally open contact J2 closes. Relay J2 self-locks (remains closed even after the breath-blowing process ends), triggering the alarm with an audible and visual alarm. Simultaneously, the normally closed contact J2 opens, preventing the airflow start control circuit from connecting regardless of the duration of the breath-blowing process, and the vehicle will not start. Manually pressing the reset button de-energizes the device, disconnects relay J2, resets the alarm, and ends the audible and visual alarm.

[0030] This utility model of a car anti-drunk driving airflow start device effectively integrates anti-drunk driving technology with one-button start technology. It allows the vehicle to start when the driver has not consumed alcohol, and prevents the vehicle from starting when the driver has consumed alcohol, while simultaneously triggering an audible and visual alarm to alert the driver. This significantly reduces the occurrence of drunk driving. Furthermore, it integrates the alcohol detection and vehicle starting processes, making it more convenient to use. This device is highly practical and has significant potential for widespread application.

[0031] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A car anti-drunk driving airflow start device, characterized in that: The device includes a power supply, an airflow sensor, an alcohol sensor, a control circuit module, an audible and visual alarm, and a car ignition circuit. The power supply powers the entire device. The airflow sensor and alcohol sensor are both connected to the signal input terminal of the control circuit module, and the audible and visual alarm and the car ignition circuit are both connected to the signal output terminal of the control circuit module. The power supply includes a positive terminal, a negative terminal, and a voltage regulator chip. The input terminal of the voltage regulator chip is connected to the positive terminal, the ground terminal of the voltage regulator chip is connected to the negative terminal, and the output terminal of the voltage regulator chip is connected to the upper end of the reset button. The positive terminal of the power supply is connected to the positive terminal of the car's power supply, and the negative terminal is connected to the negative terminal of the car's power supply.

2. The automotive anti-drunk driving airflow start device according to claim 1, characterized in that: The control circuit module includes two relays. The lower end of the reset button is connected to the VCC terminal of the airflow sensor and the left end of the normally closed contact J2. The GND terminal of the airflow sensor is connected to the negative terminal of the power supply. The OUT terminal of the airflow sensor is connected to the base of transistor Q1. The right end of the normally closed contact J2 is connected to the left end of relay J1, the cathode of diode D1, the left end of capacitor C1, and the anode of LED D3. The cathode of LED D3 is connected to the left end of current-limiting resistor R1. The right end of relay J1, the anode of diode D1, the right end of capacitor C1, and the right end of current-limiting resistor R1 are connected to the collector of transistor Q1 and the left end of normally open contact J1-1. The emitter of transistor Q1 and the right end of normally open contact J1-1 are connected to the negative terminal of the power supply. The lower end of the reset button is connected to the VCC terminal of the alcohol sensor, the left end of the relay J2, the cathode of the diode D2, and the left end of the audible and visual alarm. The GND terminal of the alcohol sensor is connected to the negative terminal of the power supply. The OUT terminal of the alcohol sensor is connected to the base of the transistor Q2. The right end of the relay J2, the anode of the diode D2, and the right end of the audible and visual alarm are connected to the collector of the transistor Q2 and the left end of the normally open contact J2. The emitter of the transistor Q2 and the right end of the normally open contact J2 are connected to the negative terminal of the power supply. The normally open contact J1-2 of the relay J1 is connected to the vehicle ignition circuit.

3. The automotive anti-drunk driving airflow start device according to claim 1, characterized in that: The airflow sensor and the alcohol sensor are arranged side by side in the driver's cabin of the car.

4. The automotive anti-drunk driving airflow start device according to claim 1, characterized in that: The voltage regulator chip is an LM7805 chip, used to step down the voltage of the car battery to 5V DC.

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