KR20240068196A - Bicycle rear sensor using ultrasonic - Google Patents

Abstract

The present invention relates to a bicycle rear sensor using ultrasonic waves. Specifically, when a rear sensor made using an ultrasonic sensor is attached to a bicycle, it detects an object at the rear and makes a warning sound while at the same time reducing the danger to bicycle riders by flashing an LED. It is a system that can prevent accidents by recognizing them.
According to the present invention, an oval case containing an ultrasonic sensor that detects an object at the rear of the bicycle and an Arduino that receives signals from the sensor are housed inside, a semicircular case containing an LED and a buzzer that alerts the rider to danger, and a case that is detachable from the bicycle. It is characterized by consisting of tongs attached to the case and a wrapping wire that connects the oval case and the semicircular case.

Description

Bicycle rear sensor using ultrasonic waves {BICYCLE REAR SENSOR USING ULTRASONIC}

The present invention is a system that can prevent accidents in advance by attaching a rear sensor made using an ultrasonic sensor to a bicycle to detect objects at the rear and sound a warning sound, and at the same time make the bicycle rider aware of danger by flashing an LED.

In general, a bicycle is driven by pedaling with the power of the legs to rotate the wheel while sitting on the saddle. These bicycles have difficulty securing rear visibility, and there is a risk of collision accidents with other bicycles, vehicles, or motorcycles while riding. In particular, when driving on the right side of a bicycle-only road or car road, the width is narrow, so if a bicycle behind you passes or changes direction, a collision accident can easily occur.

Therefore, in order to prevent such accidents, it was felt that it was necessary to develop a bicycle rear detection device using ultrasonic waves. For this purpose, application number 10-2012-0086719 discloses a 'bicycle rear detection device', which is installed to detect an object toward the rear of the bicycle and output a detection signal, and is installed to be arranged in the width direction, so that each detection area A plurality of detection sensors arranged in the width direction, a control unit that controls the detection area of an object based on the width direction to the rear by turning on/off the operation of each detection sensor, and a detection signal output from each detection sensor. A control unit that receives and outputs a signal to generate differentiated audio depending on the detected position of the object based on the width direction. It receives the signal output from the control unit and generates different audio depending on the detected position of the object based on the width direction. It includes a battery that provides the power needed for the detection of the speaker and detection sensor and the audio output of the speaker. By identifying the direction of an object approaching from the rear through audio, it is possible to quickly and easily check the rear situation, thereby enabling operations necessary for safe driving, including looking ahead, and improving the reliability of rear detection operations. Accuracy can be improved, and the size of the object's detection area can be adjusted based on the width direction from the rear according to the actual situation of the road, such as the width of the road or the density of bicycles, pedestrians, etc., which results in unnecessary or insufficient detection areas. This can eliminate inconveniences or malfunctions caused by this.

However, the above technology had the problem that it was greatly affected by the amount of light and the surrounding environment when using an illuminance sensor or an infrared sensor.

In order to solve the above-described conventional problems, the present invention uses an ultrasonic sensor to identify objects approaching from the rear through ultrasonic waves, thereby enabling quick and easy confirmation of the rear situation, and a buzzer and LED light depending on the detection situation. It notifies the occupants and allows them to recognize it in advance, enabling them to not only look ahead but also take actions necessary for safe driving to the rear. By using ultrasonic waves for rear detection, the purpose is to increase accuracy by reducing the influence of the surrounding environment.

In order to achieve the above object, according to the present invention, in the bicycle rear sensor using ultrasonic waves, an ultrasonic sensor is placed in the center of the bottom of the bicycle saddle to detect an object in the rear direction of the bicycle and output a detection signal. do. Here, the ultrasonic sensor sends a trigger signal to generate eight 40KHz pulses, receives echo pulses to measure the distance and detects the object, and Arduino Uno receives the signal and sends commands to each part. The LED and buzzer that receive commands through the wrapping wire distinguish the rear situation through light and sound output. Here, the wrapping wire serves to connect the LED and buzzer from Arduino.

The oval-shaped container containing the Arduino and ultrasonic sensor, which provides the power required for operation from the battery, and the semi-circular container containing the LED and buzzer can be detachably mounted on the bicycle through clamps.

According to the bicycle rear detector using ultrasonic waves according to the present invention, objects approaching from the rear are identified through ultrasonic waves using an ultrasonic sensor, thereby enabling quick and easy confirmation of the rear situation, and a buzzer and LED depending on the detection situation. By notifying the occupants through light and allowing them to recognize the vehicle in advance, it is possible to not only look ahead but also perform actions necessary for safe driving to the rear. By using ultrasonic waves for rear detection, accuracy can be improved with less influence from the surrounding environment.

Figure 1 shows the case structure attached to the handlebar of a bicycle in the bicycle rear sensor using ultrasonic waves according to the present invention.
Figure 2 shows the case structure attached to the lower part of the bicycle saddle in the bicycle rear sensor using ultrasonic waves according to the present invention.
Figure 3 is a flow chart showing the operation sequence of the bicycle rear sensor using ultrasonic waves according to the present invention.

Hereinafter, an embodiment of the rear detection device for a bicycle according to the present invention will be described in detail with reference to the attached drawings.

The bicycle rear sensor using ultrasonic waves according to the present invention includes an ultrasonic sensor (8), Arduino (9), battery (6), breadboard (7), buzzer (2), red LED (1), and blue LED (1). , wrapping wire, and tongs (4).

Among the attached drawings, Figure 1 shows the case structure attached to the handlebar of a bicycle in the rear bicycle sensor using ultrasonic waves according to the present invention, and Figure 2 shows the case structure attached to the lower part of the saddle of the bicycle. 3 shows the operating flow chart of the detector.

As shown in Figure 2, the ultrasonic sensor 8 is installed on the bicycle to detect an object toward the rear and output a detection signal, and the oval case 10 attached under the saddle of the bicycle contains the ultrasonic sensor 8, Includes Arduino (9) and battery (6).

As shown in Figure 1, among the semicircular cases 3 attached to both sides of the handle, the left case includes a red LED (1), and the right case includes a blue LED (1) and a buzzer (2).

Clamps (4) are attached to the back of the oval case (10) and the bottom of the semicircular case (3) to enable attachment and detachment from the bicycle. The convenience of use is increased by attaching a clip (4) to the case to easily attach and detach it from the bicycle.

Arduino (9) receives power from the battery (6), receives detection signals from the ultrasonic sensor, and sends commands to the LED (1) and buzzer (2), and the breadboard (7) uses the ultrasonic sensor (8). It plays a role in fixing the. The wrapping wire connects the oval case (10) and the semicircular case (3).

The ultrasonic sensor 8 uses a method of obtaining information according to the measurement object by measuring the time until the ultrasonic pulse emitted from the wave source within the ultrasonic sensor is reflected from the surface of the workpiece and returned to the ultrasonic sensor. In other words, a method is used to measure the delay time from transmitting ultrasonic waves until they return. Because it is less affected by light, when riding a bicycle during the day, it is less affected by sunlight and increases the accuracy of the detection signal. Here, ultrasonic waves refer to high-frequency sound waves, and sound waves are mechanical vibrations transmitted in the air, water, or solids. Among sound waves, those with a frequency in the range of 20Hz to 20KHz are called audible sounds because people can hear them, while ultrasound refers to sound waves with a frequency that is generally higher than this and cannot be heard by people.

As shown in Figure 3, the buzzer (2) receives a command from the Arduino (9) and generates a continuous buzzer sound that rings when the distance to the rear object is less than 1M from the signal detected by the ultrasonic sensor (8). And, if it is between 1M and 1M 50CM, a continuous “beep-beep-beep” buzzer sounds, and if it is over 1M 50CM, the buzzer does not sound.

As shown in Figure 3, the red and blue LEDs (1) placed on both sides of the handle receive commands from the Arduino (9) and light when the distance to the rear object is less than 1M from the signal detected by the ultrasonic sensor (8). The red LED remains on, and if it is 1M to 1M 50CM, the red LED blinks continuously while repeating the ON and OFF states. If it is over 1M 50CM, the red LED is in the OFF state and the blue LED remains on.

The buzzer sound and LED light output that operate according to the distance to the object detected at the rear of the bicycle help riders recognize danger in advance, thereby reducing accidents.

1:LED
2: Buzzer
3: semicircular case
4: tongs
5: bicycle
6: Battery
7: Breadboard
8: Ultrasonic sensor
9: Arduino Uno
10: Oval case

Claims (1)

An oval case (10) containing an ultrasonic sensor capable of detecting objects at the rear of a bicycle and the parts necessary for connection;
Arduino Uno (9), which connects the ultrasonic sensor, LED, and buzzer;
An ultrasonic sensor (8) that obtains information about the measurement object by measuring the time it takes for the ultrasonic pulse emitted from the wave source within the sensor to be reflected from the surface of the workpiece and return to the ultrasonic sensor;
Battery (6) to supply power;
Breadboard (7) for fixing the ultrasonic sensor;
Semicircular case containing buzzer and LED (3);
LED (1) that operates depending on the distance of the object detected from the rear of the bicycle;
Buzzer (2) that operates according to the distance of an object detected from the rear of the bicycle;
Clamp (4) for attaching the oval case and semicircular case to the bicycle;
Bicycle rear sensor using ultrasonic waves, characterized in that it includes: