CN101639986B - Warning system for avoiding vehicle rear-end collision - Google Patents

Abstract

The invention relates to the technical field of automobile safety, in particular to an alarm method and system for preventing automobile rear-end collision. The method provided by the present invention collects the vehicle state information according to the sensor signal, converts the state information into a digital signal, inputs it into the central processing unit, and judges whether it exceeds the preset threshold value. If the threshold value is not exceeded, return to step 2. If the threshold value is exceeded, Carry out next step, select corresponding alarm signal in voice file, and output to voice circuit, send alarm signal; , central processing unit and other components. The present invention can promptly inform the vehicle behind of the state of the vehicle through voice when a fault such as a tire blowout, collision, rollover, or secondary rear-end collision occurs, and can effectively prevent the occurrence of rear-end collision accidents in bad weather, ensuring the safety of the driver. life safety.

Description

Warning system for preventing car rear-end collision

technical field

The invention relates to the technical field of automobile safety, in particular to an alarm system for preventing automobile rear-end collision.

Background technique

The current method to prevent rear-end collisions is usually to monitor the distance between vehicles in front to prevent your own vehicle from colliding with the vehicle in front, but this method cannot solve the secondary damage to the vehicle, especially in foggy weather conditions. Vehicles only have minor faults, and these minor faults may be fatal. Due to the insufficient perspective of the fog, when these faults break down, they will cause fatal rear-end collisions, which will cause greater casualties and property damage.

Aiming at the above-mentioned deficiencies in the prior art, the present invention provides an alarm method and system for preventing rear-end collisions of vehicles after an accident occurs, so as to prevent other vehicles from posing a rear-end threat to the vehicle and ensure the safety of the driver. life safety.

Contents of the invention

The object of the present invention is to provide an alarm method and system for preventing automobile rear-end collisions, so as to avoid or reduce automobile rear-end collisions in the case of bad weather and low visibility.

To achieve the above object, the present invention adopts the following technical solutions:

An alarm system for preventing rear-end collisions of automobiles, comprising:

The acceleration sensor is used to measure the acceleration of the vehicle, and convert its state signal into a digital signal and transmit it to the central processing unit;

The speed sensor is used to measure the driving speed of the vehicle itself, and convert the signal of the mechanical rotation of the vehicle into a digital signal through the photoelectric induction signal and transmit it to the central processing unit;

Voice files, pre-stored a number of alarm signals, the output of which is connected to the central processing unit;

The voice module, the power amplifier circuit, and the loudspeaker together constitute the voice output circuit, the output end of the voice module is connected to the power amplifier circuit, and the output end of the power amplifier circuit is connected to the loudspeaker;

The central processing unit is used to judge whether the preset threshold is exceeded according to the state signal input by the sensor, so as to decide whether to output an alarm signal to the voice output circuit, and at the same time select the corresponding voice file, transmit it to the voice module for decoding, and then decode the The final file is transmitted to the power amplifier circuit and speaker;

The rangefinder is used to measure the distance to the vehicle behind, and convert the information into a digital signal and transmit it to the central processing unit; if the measured vehicle distance is not within the safe range, the central processing unit will automatically send out a warning sound to the driver and the vehicle behind signal, automatically and timely reminding the driver behind to keep a safe distance from the target in front;

The wireless intercom is used to inform the following vehicles of the detected fault status through the wireless intercom system after the central processing unit detects the fault state of the vehicle, wherein the input end of the wireless intercom is connected to the central processing unit;

The manual control switch is used to manually select the voice file corresponding to the fault state when all the sensors fail, decode and transmit it to the amplifier circuit through the voice module, and notify the detected fault state through the loudspeaker or wireless intercom system A vehicle in which the input of the manual control switch is connected from the central processing unit.

The attitude sensor is used to measure the attitude of the vehicle, detect whether the vehicle is overturned, and convert its state into a digital signal and transmit it to the central processing unit;

The pressure sensor is used to measure the pressure of the tire, detect whether the vehicle is blown out and convert the collected pressure state into a digital signal and transmit it to the central processor; the corner sensor is used to detect the information of the vehicle turning and convert the state information into digital The signal is transmitted to the central processing unit.

The loudspeaker has an opening angle between 5° and 30° and is mounted on the rear of the car chassis.

The speed information of the CPU is extracted through the CAN bus and read directly from the speed sensor of the car itself.

The present invention has the following advantages and positive effects:

1) When the vehicle has a tire blowout, collision, rollover, secondary rear-end collision, etc., it can promptly inform the vehicle behind of the vehicle's status through voice, which can effectively prevent rear-end collision accidents;

2) In severe weather, it can effectively prevent other vehicles from posing a rear-end threat to the own vehicle, thereby ensuring the safety of the driver.

Description of drawings

Fig. 1 is a flow chart of the warning method for preventing automobile rear-end collision proposed by the present invention.

Fig. 2 is a connection block diagram of an embodiment of the warning system for preventing automobile rear-end collision proposed by the present invention.

Fig. 3 is a connection block diagram of another embodiment of the warning system for preventing automobile rear-end collision proposed by the present invention.

Fig. 4 is a schematic diagram of the installation of the warning system for preventing rear-end collisions of automobiles proposed by the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the present invention will be further described with specific embodiment:

The warning method that the present invention proposes to prevent automobile rear-end collision specifically adopts following technical scheme, referring to the flow chart shown in Fig. 1, comprises the following steps:

① System startup;

②System self-inspection;

③Whether there is a fault in the system, if there is a fault, turn on the manual control switch, manually select the corresponding alarm voice file according to the fault, and transmit it to the voice circuit; if there is no fault, continue to the next step;

④ Each sensor collects the vehicle status signal according to the set sequence;

⑤Convert the state information into a digital signal, input it to the central processing unit, and compare it with the set threshold;

⑥Judging whether the preset threshold is exceeded, if not, return to step ④, and if it exceeds the threshold, proceed to the next step;

⑦ Select the corresponding alarm signal in the voice file and output it to the voice circuit;

⑧Send an alarm signal;

⑨Judge whether the sensors have been detected in sequence, if not, execute step ④; if the detection is complete, execute step ③.

The sensor described in step ④ comprises one or more in various sensors such as acceleration sensor, speed sensor, attitude sensor, pressure sensor, angler;

The alarm signal described in step ⑦ includes one or more of various fault signals such as collision, emergency braking, vehicle rollover, tire blowout, lane change, etc. The sensors used to detect the above states correspond to the sensors described in step ④.

The alarm system for preventing automobile rear-end collisions proposed by the present invention specifically adopts the following technical scheme, as shown in Fig. The output ends of sensors, speed sensors, other sensors, and voice files are connected to the central processing unit, the output end of the central processing unit is connected to the voice module, the output end of the voice module is connected to the power amplifier circuit, and the output end of the power amplifier circuit is connected to the loudspeaker;

The acceleration sensor is used to measure the acceleration of the vehicle, and converts its state signal into a digital signal and transmits it to the central processing unit. The signal is transmitted to the central processor, and the voice file pre-stores multiple alarm signals. The voice module, power amplifier circuit, and speaker together constitute the voice output circuit. The central processor is used to judge whether the preset threshold is exceeded according to the status signal input by the sensor. , to decide whether to output the alarm signal to the voice output circuit, and at the same time select the corresponding voice file, transmit it to the voice module for decoding, and then transmit the decoded file to the power amplifier circuit and the speaker.

The opening angle of the speaker of this system is between 5° and 30°, which can make the best sound transmission effect, and it is located at the rear of the car chassis, as shown in Figure 4.

Another embodiment of the present invention, as shown in Figure 3, the warning system that the present invention proposes to prevent automobile rear-end collision can also optionally include other sensors, manual control switches, wireless intercom systems, wherein other sensors include attitude sensors, One or more of pressure sensors, rangefinders, anglers, etc.

The attitude sensor is used to measure the attitude of the vehicle, and converts its state into a digital signal and transmits it to the central processing unit. The pressure sensor is used to measure the pressure of the tire, and converts the collected pressure state into a digital signal and transmits it to the central processing unit.

The range finder is used to measure the distance to the rear vehicle, and convert the information into a digital signal and transmit it to the central processing unit; the rear range finder can automatically detect the distance of the rear vehicle, and the vehicle speed sensor and deceleration The sensor detects the speed and deceleration of the vehicle during driving, and inputs the data measured by the range finder, vehicle speed sensor and acceleration sensor into the central processing unit for comparison and digital processing, and judges whether the vehicle is in line with the vehicle behind it according to different weather conditions. Keep driving within a safe range. If the measured vehicle distance is not within the safe range, the central processor will automatically send an early warning signal to the driver and the vehicle behind, and automatically remind the driver behind to keep a safe distance from the target in front, avoiding the impact of the vehicle behind on the vehicle. Rear-end collision is possible, especially when the driver is driving for a long distance and fatigued or the driver is a novice, it is particularly important to remind him in a timely manner.

The corner switch is used to detect the turning information of the vehicle, and convert the state information into a digital signal and transmit it to the central processing unit.

The wireless intercom is used to notify the following vehicles of the detected fault status through the wireless intercom system after the central processing unit detects the fault status of the vehicle (collision, emergency braking, overturning, tire blowout). The input terminal is connected from the central processing unit.

The manual control switch is used to manually select the voice file corresponding to the fault state when all the sensors fail, decode and transmit it to the amplifier circuit through the voice module, and inform the detected fault state through the loudspeaker or wireless intercom system A vehicle in which the input of the manual control switch is connected from the central processing unit.

The speed information of the central processor can also be extracted through the CAN bus, which is directly read from the speed sensor of the car itself.

The automobile rear-end collision warning system of the present invention is a dynamic automobile safety driving auxiliary system. The system can be installed without changing the original vehicle circuit, oil circuit and braking system. The specific installation structure diagram is shown in FIG. 4 .

Claims (4)

1. A kind of warning system that prevents automobile rear-end collision, is characterized in that, comprises: The acceleration sensor is used to measure the acceleration of the vehicle, and convert its state signal into a digital signal and transmit it to the central processing unit; The speed sensor is used to measure the driving speed of the vehicle itself, and convert the signal of the mechanical rotation of the vehicle into a digital signal through the photoelectric induction signal and transmit it to the central processing unit; Voice files, pre-stored a number of alarm signals, the output of which is connected to the central processing unit; The voice module, the power amplifier circuit, and the loudspeaker together constitute the voice output circuit, the output end of the voice module is connected to the power amplifier circuit, and the output end of the power amplifier circuit is connected to the loudspeaker; The central processing unit is used to judge whether the preset threshold is exceeded according to the state signal input by the sensor, so as to decide whether to output an alarm signal to the voice output circuit, and at the same time select the corresponding voice file, transmit it to the voice module for decoding, and then decode the The final file is transmitted to the power amplifier circuit and speaker; The rangefinder is used to measure the distance to the vehicle behind, and convert the information into a digital signal and transmit it to the central processing unit; if the measured vehicle distance is not within the safe range, the central processing unit will automatically send out a warning sound to the driver and the vehicle behind signal, automatically and timely reminding the driver behind to keep a safe distance from the target in front; The wireless intercom is used to inform the following vehicles of the detected fault status through the wireless intercom system after the central processing unit detects the fault state of the vehicle, wherein the input end of the wireless intercom is connected to the central processing unit; The manual control switch is used to manually select the voice file corresponding to the fault state when all the sensors fail, decode and transmit it to the amplifier circuit through the voice module, and notify the detected fault state through the loudspeaker or wireless intercom system A vehicle in which the input of the manual control switch is connected from the central processing unit. 2. The warning system preventing automobile rear-end collision according to claim 1, is characterized in that, also comprises: The attitude sensor is used to measure the attitude of the vehicle, detect whether the vehicle is overturned, and convert its state into a digital signal and transmit it to the central processing unit; The pressure sensor is used to measure the pressure of the tire, detect whether the vehicle is blown out and convert the collected pressure state into a digital signal and transmit it to the central processing unit; The corner switch is used to detect the turning information of the vehicle, and convert the status information into a digital signal and transmit it to the central processing unit. 3. according to claim 1 or 2 described warning systems for preventing automobile rear-end collision, it is characterized in that: The loudspeaker has an opening angle between 5° and 30° and is mounted on the rear of the car chassis. 4. according to claim 1 or 2 described warning systems for preventing automobile rear-end collision, it is characterized in that: The speed information of the CPU is extracted through the CAN bus and read directly from the speed sensor of the car itself.

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