CN111532235A - A system for judging whether a car door can be opened safely based on sonar detection and its judging method - Google Patents

Abstract

The invention discloses a system and a judging method for judging whether a vehicle door can be safely opened based on sonar detection. The system includes a sonar detector, a microprocessor, an LED lamp, a driving circuit, a contact mechanism, a buzzer, and a power supply. And the power management circuit, the vehicle speed sensor senses the speed of the vehicle and converts the detected signal into an electrical signal and transmits it to the microprocessor. The microprocessor calculates the received signal to determine whether the vehicle speed is zero. If it is zero, execute Sonar detector, if it is not zero, it will not be executed; the sonar detector is used to detect the orientation, distance and speed of the object, convert the detection signal into an electrical signal and transmit it to the microprocessor, and perform operations on the measured data to determine whether the object is correct or not. Passengers who open the doors pose a safety threat. The invention uses sonar to detect pedestrians and vehicles, has high detection accuracy, can effectively avoid the dangerous situation that passengers hit other vehicles and pedestrians when opening the door, and can improve the safety of vehicles.

Description

A system for judging whether a car door can be opened safely based on sonar detection and its judging method

technical field

The invention belongs to the field of vehicle safety functions, and more particularly relates to a system and a method for judging whether a vehicle door can be safely opened based on sonar detection.

Background technique

In modern society, the social and economic situation is getting better and better, the number of vehicles in China is increasing day by day, and the urban infrastructure is becoming more and more developed, resulting in more and more crowded roads, and China has a large population. There are also a lot of electric vehicles, tricycles, etc. We often see a car parked on the side of the road, the passengers in the car do not pay attention to the pedestrians and vehicles behind the car, and blindly open the door, causing the pedestrians and vehicles to hit the door. Unnecessary injuries and economic losses occur. At present, most vehicles do not have such a system for judging whether the door can be opened safely. It mainly depends on people's own consciousness. However, sometimes people forget to pay attention to the pedestrians behind when opening the door. Especially kids.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned defects and deficiencies in the prior art, the present invention provides a sonar detection method for pedestrian vehicles, which has high detection accuracy, can effectively avoid the danger of passengers hitting other vehicles and pedestrians when opening the door, and can improve the safety of the vehicle. A system for judging whether a car door can be safely opened based on sonar detection and a judging method thereof, which is safe, and has an intelligent opening function and an opening and closing alarm function.

The technical solution of the present invention: a system for judging whether a vehicle door can be safely opened based on sonar detection, including a sonar detector, a microprocessor, an LED light, a drive circuit, a contact mechanism, a buzzer, a power supply and a power management circuit , the microprocessor is connected with the vehicle speed sensor, the vehicle speed sensor senses the speed of the vehicle and converts the detected signal into an electrical signal and transmits it to the microprocessor, and the microprocessor calculates the received signal to determine the speed of the vehicle Whether it is zero, if it is zero, execute the sonar detector, if not, do not execute it; the sonar detector is connected to the microprocessor, the sonar detector is used to detect the azimuth, distance, and speed of the object, and the detection signal is converted into The electrical signal is transmitted to the microprocessor, and the measured data is calculated to determine whether the object poses a safety threat to the passengers when the door is opened; the power supply is connected to the power management circuit, and the power manager is connected to the microprocessor.

The invention uses the vehicle speed sensor to determine whether other actuators are turned on, so that it has the function of intelligent opening, which saves electricity and prolongs the life of the equipment. The LED light reminds the passengers. If the passengers do not pay attention to the LED lights when they open the door, the buzzer will sound an alarm to remind the passengers. Therefore, the system can effectively avoid the danger of the passengers hitting other vehicles and pedestrians when they open the door, making it capable of opening and closing. The alarm function can improve the safety of the vehicle.

Preferably, the input end of the LED light is connected to the microprocessor, and the LED light receives the control signal of the microprocessor and turns on and off and emits light.

Preferably, the input end of the drive circuit is connected to the microprocessor, the output end is connected to the buzzer, and the function of the buzzer is to give an alarm, and the drive circuit is controlled by the drive signal of the microprocessor.

Preferably, the contact mechanism is connected to the drive circuit, and the contact switch is installed on the door handle inside the vehicle door. Normally, the contact is in an open and closed state, and when the door handle is opened, the contact is in a closed state.

Preferably, the position of the sonar detector is placed in the middle of the vehicle, and the microprocessor calculates the horizontal and vertical horizontal distances from the object to the vehicle according to the distance, azimuth, and speed measured by the sonar detector on the object. The vertical and horizontal distance and speed preset a range value.

A system judging method for judging whether a vehicle door can be safely opened based on sonar detection, comprising the following steps:

a. First judge whether the vehicle is in the braking state according to the signal transmitted by the microprocessor to the speed sensor in the vehicle, if the vehicle speed is not zero, do not execute any execution device, if the vehicle speed is zero, execute step b;

b. The sonar detector is executed by the microprocessor to detect the orientation, distance and speed of the object, and the detection signal is converted into an electrical signal and transmitted to the microprocessor. The microprocessor processes the distance and orientation of the object measured by the sonar detector. The angle and speed calculate the horizontal and vertical horizontal distances from the object to the vehicle, and determine whether the calculated horizontal and vertical horizontal distances and speed values are within a preset range. The detector is turned on and does not execute other originals. If it is within the range, go to step c;

c. The microprocessor sends a signal to make the LED light on, visually reminding the passengers in the car to pay attention to the danger, and also sends a command signal to the drive circuit, and the drive circuit amplifies the command power;

d. If in the case of step c, when a passenger opens the door handle on the inner side of the door, the drive circuit will be turned on, and the buzzer will sound, audibly reminding the passenger to pay attention to the danger.

The invention uses the vehicle speed sensor to determine whether other actuators are turned on, so that it has the function of intelligent opening, which saves electricity and prolongs the life of the equipment. The LED light reminds the passengers. If the passengers do not pay attention to the LED lights when they open the door, the buzzer will sound an alarm to remind the passengers. Therefore, the system can effectively avoid the danger of the passengers hitting other vehicles and pedestrians when they open the door, making it capable of opening and closing. The alarm function can improve the safety of the vehicle.

Description of drawings

1 is a schematic diagram of module connection of the present invention;

Figure 2 is a schematic flow chart of the present invention.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific implementations, but the protection scope of the present invention is not limited thereto.

As shown in Figure 1, a system for judging whether a car door can be safely opened based on sonar detection includes a sonar detector, a microprocessor, an LED light, a drive circuit, a contact mechanism, a buzzer, a power supply and a power management circuit , The system has an intelligent opening function and an alarm function on and off, and uses sonar to detect pedestrians and vehicles with high detection accuracy.

The microprocessor is connected with the speed sensor of the vehicle. The speed of the vehicle sensed by the speed sensor converts the detected signal into an electrical signal and transmits it to the microprocessor. The microprocessor calculates the received signal to determine whether the speed of the vehicle is Zero, if zero, execute the sonar detector, if non-zero, do not execute.

The sonar detector is connected with the microprocessor. The sonar detector is used to detect the orientation, distance and speed of the object, convert the detection signal into an electrical signal and transmit it to the microprocessor, and perform operations on the measured data to determine whether the object is suitable for opening the door. of passengers pose a safety threat.

The position of the sonar detector is placed in the middle of the vehicle, and the microprocessor calculates the horizontal and vertical horizontal distances from the object to the vehicle according to the distance, azimuth, and speed measured by the sonar detector to the object. Speed presets a range of values.

The power supply is connected with the power management circuit, and the power manager is connected with the microprocessor; the input end of the LED light is connected with the microprocessor, and the LED light receives the control signal of the microprocessor and turns on and off and emits light; the input end of the drive circuit is connected with the microprocessor , the output end is connected with the buzzer, the function of the buzzer is to alarm, and the driving circuit is controlled by the driving signal of the microprocessor.

The contact mechanism is connected to the drive circuit, and the contact mechanism is installed on the door handle on the inner side of the door. Normally, the contact is in the open and closed state. When the door handle is opened, the contact is in the closed state, and the buzzer gives an alarm.

As shown in Figure 2, a method for judging a system for judging whether a vehicle door can be safely opened based on sonar detection, the specific steps are as follows:

a. First, judge whether the vehicle is in the braking state according to the signal transmitted by the microprocessor to the speed sensor in the vehicle, if the vehicle speed is not zero, do not execute any execution device, if the vehicle speed is zero, execute step b;

b. The sonar detector is executed by the microprocessor to detect the orientation, distance and speed of the object, and the detection signal is converted into an electrical signal and transmitted to the microprocessor. The microprocessor processes the distance and orientation of the object measured by the sonar detector. The angle and speed calculate the horizontal and vertical horizontal distances from the object to the vehicle, and determine whether the calculated horizontal and vertical horizontal distances and speed values are within a preset range. The detector is turned on and does not perform other originals, if step c is performed within range;

c. The microprocessor sends a signal to make the LED light on, visually reminding the passengers in the car to pay attention to the danger, and also sends a command signal to the drive circuit, and the drive circuit amplifies the command power;

d. If in the case of step c, when a passenger opens the door handle on the inner side of the door, the drive circuit will be turned on, and the buzzer will sound, audibly reminding the passenger to pay attention to the danger.

The illustrated embodiment is the preferred embodiment of the present invention, but the present invention is not limited to the above-mentioned embodiment, without departing from the essence of the present invention, any obvious improvement, replacement or Modifications all belong to the protection scope of the present invention.

Claims (6)

1. A system for judging whether a vehicle door can be safely opened or not based on sonar detection is characterized in that: the vehicle speed detection system comprises a sonar detector, a microprocessor, an LED lamp, a driving circuit, a contact mechanism, a buzzer, a power supply and a power supply management circuit, wherein the microprocessor is connected with a vehicle speed sensor of a vehicle, the vehicle speed sensor senses the speed of the vehicle and converts a detected signal into an electric signal to be transmitted to the microprocessor, the microprocessor calculates the received signal to judge whether the vehicle speed is zero or not, if the vehicle speed is zero, the sonar detector is executed, and if the vehicle speed is not zero, the sonar detector is not executed; the sonar detector is connected with the microprocessor and used for detecting the direction, distance and speed of an object, converting a detection signal into an electric signal and transmitting the electric signal to the microprocessor, and calculating the measured data to judge whether the object brings safety threat to passengers when the vehicle door is opened; the power supply is connected with the power supply management circuit, and the power supply manager is connected with the microprocessor.

2. The system for judging whether the vehicle door can be safely opened based on sonar detection according to claim 1, wherein: the input end of the LED lamp is connected with the microprocessor, and the LED lamp receives a control signal of the microprocessor, is switched on and off and emits light.

3. The system for judging whether the vehicle door can be safely opened based on sonar detection according to claim 1, wherein: the input end of the driving circuit is connected with the microprocessor, the output end of the driving circuit is connected with the buzzer, the buzzer is used for alarming, and the driving circuit is controlled by a driving signal of the microprocessor.

4. The system for judging whether the vehicle door can be safely opened based on sonar detection according to claim 1, wherein: the contact mechanism is connected on a driving circuit, the contact switch is installed on a door handle on the inner side of a vehicle door, the contact is in an opening and closing state under a normal condition, and the contact is in a closing state when the door handle is opened.

5. The system for judging whether the vehicle door can be safely opened based on sonar detection according to claim 1, wherein: the sonar detector is placed in the middle of the vehicle, the microprocessor calculates the horizontal distance between the object and the vehicle according to the distance, the azimuth angle and the speed measured by the sonar detector on the object, and a range value is preset for the horizontal distance and the speed.

6. A judging method of the system for judging whether the vehicle door can be safely opened based on sonar detection according to claim 1, wherein: which comprises the following steps:

a. firstly, judging whether the vehicle is in a braking state according to a signal transmitted by a speed sensor in the vehicle by a microprocessor, if the vehicle speed is not zero, not executing any execution device, and if the vehicle speed is zero, executing the step b;

b. executing a sonar detector through a microprocessor, detecting the direction, the distance and the speed of an object, converting a detection signal into an electric signal and transmitting the electric signal to the microprocessor, calculating the horizontal and longitudinal horizontal distances between the object and a vehicle by the microprocessor according to the distance, the direction angle and the speed measured by the sonar detector on the object, judging whether the calculated horizontal and longitudinal horizontal distances and speed values are within a preset range value, if not, judging that the vehicle is safe, keeping the sonar detector on and not executing other original components, and if the vehicle is within the range, executing a step c;

c. the microprocessor sends a signal to enable the LED lamp to be on, visually reminds passengers in the vehicle of paying attention to danger, and simultaneously sends an instruction signal to the driving circuit, and the driving circuit amplifies the instruction power;

d. if in the case of step c, a passenger opens the door handle inside the door, the driving circuit is turned on and the buzzer sounds to audibly alert the passenger of the danger.

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