KR20000008211A - Crash preventive device of vehicle using supersonic wave sensor and method - Google Patents

Abstract

PURPOSE: A crash preventive device of a vehicle using a supersonic wave sensor is provided to shorten a driving time of a supersonic wave which is weak in noise, and to quicken a replay time. CONSTITUTION: The crash preventing device comprises:a sensor unit(100) to measure a data about a distance with a front car or with a rear car; a control unit(200) to output a control signal by comparing; a buzzer(300) to alarm to a user through a buzzer sound when the measured data of the distance is shorter than a stored data; a display unit(400) to check the signal fed from the control unit as a alarm signal by a user's eye.

Description

Vehicle collision prevention device and method using ultrasonic sensor

The present invention relates to a vehicle collision prevention apparatus and method using an ultrasonic sensor, in particular, to monitor the front or rear of the vehicle by using an ultrasonic sensor, and if the object is present close to a certain distance stored by measuring the distance to the vehicle The present invention relates to a vehicle collision avoidance device and method using an ultrasonic sensor which shortens the driving time of ultrasonic waves susceptible to noise and speeds up the response time.

Due to the characteristics of the general ultrasonic sensor, it is vulnerable to the ambient noise. In measuring distance, it is easy to cause malfunction only by the data value acquired by one transmission and reception. In general, for distance measurement, if the distance error is not severe after 3 times transmission / reception, it is judged as accurate distance data. When 8 sensors are installed in front and rear of the vehicle, distance measurement is performed 3 times per sensor. Since the distance measurement is performed 24 times, it takes 50㎳ at a time, so it takes 1200㎳ to drive 8 sensors as a whole, so the response speed is very slow.

An object of the present invention is to solve the above-mentioned conventional problems, in particular, all the sensors mounted on the vehicle to measure the distance once and add only about two times only the sensor detected the obstacle to the nearest distance When the distance is not severely measured by measuring the distance again, if it is determined that the measured data is accurate, the vehicle collision prevention device using the ultrasonic sensor which can drive 8 sensors with the time of 500㎳ and the response speed is also faster. To provide a way.

Vehicle collision prevention device using the ultrasonic sensor of the present invention to achieve the above object is attached to the front and rear of the vehicle sensor unit for measuring data about the distance between the front car and the rear car; A control unit for comparing the data applied from the sensor unit with the data stored in the memory and outputting a control signal thereto; A buzzer for notifying a driver of a danger through a buzzer sound when the measured data according to a control signal applied from the controller is shorter than the stored data; Technical features of the present invention include a display unit configured to allow a driver to visually confirm that the signal applied from the controller is a dangerous signal.

1 is a schematic diagram of a vehicle collision prevention device using the ultrasonic sensor of the present invention.

Block diagram,

Figure 2 shows a vehicle collision prevention method using the ultrasonic sensor of the present invention

The control flow is also.

<Description of the symbols for the main parts of the drawings>

100 sensor unit 200 control unit

300: buzzer 400: display unit

Hereinafter, with reference to the accompanying drawings for an embodiment according to the technical idea of the vehicle collision prevention device and method using the ultrasonic sensor of the present invention configured as described above are as follows.

<Example>

As shown in FIG. 1, the sensor unit 100 is attached to the front and the rear of the vehicle to measure data about the distance between the front vehicle and the rear vehicle and apply the data to the controller 200, and the controller 200 The data applied from the sensor unit 100 is compared with the data stored in the memory, and a control signal corresponding thereto is applied to the buzzer 300 and the display unit 400, and the buzzer 300 from the control unit 200. If the measured data is shorter than the stored data according to the applied control signal, the driver notifies the driver of the danger through a buzzer sound, and the display unit 400 visually confirms that the signal applied from the controller 200 is a dangerous signal. The present embodiment is constituted by outputting it as possible.

Hereinafter, the operation of the present embodiment configured as described above will be described in detail with reference to the accompanying drawings.

First, the sensor unit 100 mounted on the front and rear of the vehicle continuously transmits ultrasonic waves to check obstacles at the front or rear of the vehicle. At first, the eight sensors simultaneously transmit and receive ultrasonic waves. The received data is applied to the control unit 200, and the control unit 200 additionally transmits and receives about twice the sensor received by hitting the nearest obstacle.

The controller 200 searches the received data and determines that the data is correct when the distance error is not severe. If the data determined by the control unit 200 is larger than the tolerance or smaller than the tolerance, the value is greater than the tolerance is continuously checked for the presence of the obstacle, if the value is smaller than the tolerance, the buzzer 300 and The display unit 400 informs the driver of a danger signal.

Hereinafter, a vehicle collision prevention method using an ultrasonic sensor will be described with reference to FIG. 2, and a first step S1 of simultaneously transmitting / receiving ultrasonic waves from eight sensors; A second step S2 of analyzing the signal received in the first step S1 and converting the signal into distance data; A third step (S3) of selecting only a sensor on which an obstacle is detected at the shortest distance based on the distance data converted in the second step (S2); A fourth step S4 of transmitting / receiving ultrasonic waves twice in the sensor selected in the third step S3; A fifth step (S5) of analyzing the path received in the fourth step (S4) and converting it into distance data; A sixth step (S6) of subtracting the distance data measured twice from the first measured distance data value and comparing the subtracted value with the tolerance to compare whether the tolerance is larger; If the result of the comparison judgment of the sixth step (S6) is smaller than the tolerance, the distance data measured three times from the distance data measured twice is subtracted and the subtracted value is compared with the tolerance to compare whether the tolerance is larger. A seventh step S7 to be performed; If the result of the comparative determination of the seventh step (S7) is larger, the operation is performed as an eighth step (S8) of displaying the risk on the instrument panel together with the buzzer sound according to the distance data.

As described above, the vehicle collision avoidance apparatus and method using the ultrasonic sensor of the present invention, in particular, by transmitting and receiving the ultrasonic wave about two times only to the sensor received closest to the obstacle, the eight times in a short time of 500 ㎳ The sensor can be driven, and the response time is also shortened by driving eight ultrasonic sensors in a short time of 500 ms.

Claims (2)

Sensor units attached to the front and rear of the vehicle for measuring data about the distance between the front vehicle and the rear vehicle; A control unit for comparing the data applied from the sensor unit with the data stored in the memory and outputting a control signal thereto; A buzzer for notifying a driver of a danger through a buzzer sound when the measured data according to a control signal applied from the controller is shorter than the stored data; And a display unit configured to allow a driver to visually confirm that the signal applied from the controller is a dangerous signal. Hereinafter, a vehicle collision prevention method using an ultrasonic sensor will be described with reference to FIG. 2, and a first step S1 of simultaneously transmitting / receiving ultrasonic waves from eight sensors; A second step S2 of analyzing the signal received in the first step S1 and converting the signal into distance data; A third step (S3) of selecting only a sensor on which an obstacle is detected at the shortest distance based on the distance data converted in the second step (S2); A fourth step S4 of additionally transmitting / receiving ultrasonic waves twice in the sensor selected in the third step S3; A fifth step S5 of analyzing the signal received in the fourth step S4 and converting the signal into distance data; A sixth step (S6) of subtracting the distance data measured twice from the first measured distance data value and comparing the subtracted value with the tolerance to compare whether the tolerance is larger; If the result of the comparison judgment of the sixth step (S6) is smaller than the tolerance, the distance data measured three times from the distance data measured twice is subtracted and the subtracted value is compared with the tolerance to compare whether the tolerance is larger. A seventh step S7 to be performed; If the tolerance of the comparison result of the seventh step (S7) is larger, the vehicle collision prevention method using the ultrasonic sensor, characterized in that the operation to the eighth step (S8) to display the danger on the instrument panel with the buzzer sound according to the distance data .