• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a front obstacle detecting device for a vehicle, and more particularly, to a front obstacle detecting device for a vehicle using an infrared sensor and a laser radar to compensate for a detection error caused by an infrared sensor. To this end, the present invention includes an infrared sensor for transmitting an infrared signal to the front of the vehicle and determines the presence of the human body in accordance with the presence or absence of the infrared signal received by the reflection and alerts when the human body is within a predetermined distance in front of the vehicle. In the front obstacle detection device of the vehicle, A laser radar for transmitting the laser beam toward the front of the host vehicle at the same time as the driving of the infrared sensor and receiving the laser beam reflected by the obstacle, and the presence or absence of an obstacle in front of the host vehicle based on the detection result of the infrared sensor and the laser radar. And a microprocessor for determining the type according to the size and for alerting the driver when the determination is that the obstacle is a person.
    公开号:KR19980052729A
    申请号:KR1019960071749
    申请日:1996-12-24
    公开日:1998-09-25
    发明作者:김채수
    申请人:오상수；만도기계 주식회사；
    IPC主号:
    专利说明:

    Vehicle Obstacle Detection Device
    The present invention relates to a front obstacle detecting device for a vehicle, and more particularly, to a front obstacle detecting device for a vehicle using an infrared sensor and a laser radar to compensate for a detection error caused by an infrared sensor.
    1 is a control block diagram showing a configuration of a front obstacle detecting device of a conventional vehicle. As shown in FIG. 1, the infrared sensor 12 emits infrared rays toward the front of the host vehicle, the sensor driver 11 driving the infrared sensor 12, and the infrared signal reflected from an obstacle and returned. A microprocessor 10 that receives the received signal detection unit 13 and the detection result of the reception signal detector 13 to determine whether there is an obstacle in front of the host vehicle, and a control signal of the microprocessor 10. It is provided with a warning driving unit 14 for driving the buzzer 15 and the like to receive the input to warn the presence of the human body in front of the vehicle.
    The infrared sensor 12 used to detect an obstacle in front of the vehicle, in particular, the presence of a human body in the front obstacle detection device of a conventional vehicle according to this configuration is to detect an obstacle, in particular, a human body in response to a change in ambient temperature. It is commonly used to automatically control the lighting and extinguishing of lightings used in corridors or stairs at night, and is also used for intruder detection devices.
    However, in the detection of the human body in front of the vehicle by the infrared sensor, the infrared sensor responds to changes in ambient temperature, so the front of the vehicle is driven by geothermal heat generated by the heat of the road surface such as heat from the exhaust pipe of the vehicle ahead or summer. Even if the human body does not exist in the infrared sensor detects that there is an obstacle and malfunctions, thereby causing a false alarm, causing a problem of lowering the reliability of the device.
    Therefore, the present invention has been made to solve this problem, the object of the front obstacle detection device of the vehicle to prevent the malfunction of the infrared sensor according to the temperature change of the ambient in the front obstacle detection device using the infrared sensor. Is to provide.
    1 is a control block diagram showing a configuration of a front obstacle detecting device of a conventional vehicle;
    Figure 2 is a control block diagram showing the configuration of the front obstacle detecting device of the vehicle according to the present invention,
    FIG. 3 illustrates an operation waveform diagram according to an example of the laser radar shown in FIG. 2.
    Explanation of symbols on the main parts of the drawings
    20 microprocessor, 21 sensor drive unit,
    22 Infrared sensor, 23 Infrared bridal,
    24 ... LD drive, 25 ... laser diode,
    26.Laser receiver, 27.Driver,
    28 ... buzzer.
    In order to realize the above object, the vehicle front obstacle detecting device according to the present invention includes an infrared sensor for transmitting an infrared signal to the front of the vehicle and determines the presence of the human body according to the presence or absence of the infrared signal received and reflected. In the front obstacle detection device of a vehicle to alert an alarm when a human body exists within a predetermined distance,
    A laser radar for transmitting the laser beam toward the front of the host vehicle at the same time as the driving of the infrared sensor and receiving the laser beam reflected by the obstacle, and the presence or absence of an obstacle in front of the host vehicle based on the detection result of the infrared sensor and the laser radar. And a microprocessor for determining the type according to the size and for alerting the driver if it is determined that the obstacle is a person.
    In addition, in the present invention, the laser radar is configured to continuously vary the transmission direction of the laser beam at a predetermined unit time, and to determine the size of the obstacle by counting the number of laser beams received and reflected by the obstacle. It is done.
    Hereinafter, the configuration and the effect according to the preferred embodiment of the present invention will be described in detail.
    First of all, in order to minimize the damage of the driver from various accidents occurring during the operation of the vehicle, it is necessary to prevent potential accidents by warning the driver by estimating potential accidents while driving away from safety measures such as seat belts or airbags. Research is active.
    As one of such attempts, the distance between the own vehicle and the preceding vehicle is calculated by measuring the time until the laser beam emitted to the front of the own vehicle is reflected by the reflector attached to the tail light of the preceding vehicle and then returned. A collision avoidance system has been developed that warns when there is a possibility of collision, taking into account the calculated inter-vehicle distance, stopping distance, and relative speeds of the own vehicle and the preceding vehicle.
    The present invention is to reduce the malfunction of the infrared sensor by using a laser radar used in the front collision prevention device, as shown in FIG. First, Figure 2 is a control block diagram showing the configuration of the front obstacle detecting apparatus for a vehicle according to the present invention. As shown in FIG. 2, the apparatus for detecting a front obstacle of a vehicle according to the present invention includes an infrared sensor 22 for transmitting infrared rays toward the front of the vehicle, and a sensor driver 21 for driving the infrared sensor 22. Infrared receiver 23 for receiving an infrared signal reflected back to the obstacle, a laser diode (25) mounted in the center of the front grill of the vehicle and firing a laser beam toward the front of the vehicle, and the laser at predetermined time periods LD driver 24 for turning the diode 25 on or off, a laser receiver 26 for detecting a signal received by being reflected from an obstacle after being emitted from the laser diode 25, the infrared receiver 23 and The microprocessor 20 that receives the detection result of the laser receiver 26 to determine the presence of the human body in front of the vehicle, and receives the control signal of the microprocessor 20 Warning for the presence of the front body and provided with an alert driver 27 for driving the registration buzzer 28.
    In this configuration, the laser radar is a scan laser radar, which is a scan laser radar of the present invention, compared with a conventional laser radar transmitting only one laser beam or a plurality of laser beams in one predetermined direction. The laser beam is transmitted in different directions every predetermined time within a predetermined constant detection area. That is, as shown in FIG. 3, the transmission direction of the laser beam is changed to S1-S2-S3 -...- Sn every predetermined unit time to be continuously transmitted.
    The operation of the front obstacle detecting device of the vehicle according to the present invention having the above configuration will be described below.
    First, while the host vehicle is running, the microprocessor 20 outputs a pulsed signal having a very short time period, for example, several nsec time periods to the laser diode driver 24 at regular time periods, and then generates a laser diode. 25) turns on the laser beam towards the front of the vehicle. At this time, the laser diode driver 24 transmits the laser beam emitted from the laser diode 25 in a predetermined direction every predetermined unit time so that the detection area of the laser beam can be changed every time.
    Meanwhile, at the same time as the laser diode 25 is driven, the microprocessor 20 outputs a drive signal to the sensor driver 21 to drive the infrared sensor 22, thereby outputting an infrared signal toward the front of the vehicle. Will be. At this time, the infrared signal emitted from the infrared sensor 22 is received by the infrared receiver 23 according to the presence or absence of an obstacle existing in front of the host vehicle.
    At this time, for example, when there is an obstacle, that is, a human body in front of the vehicle, the infrared signal emitted by the driving of the infrared sensor 22 is reflected by the obstacle and received by the infrared receiver 23, and simultaneously from the laser diode 25. The emitted laser beam is reflected by the obstacle and received by the laser receiver 26. At this time, the microprocessor 20 receives the detection result of the infrared receiver 23 to determine the presence of the obstacle, and at the same time receives the detection result of the laser receiver 26 corresponds to the size of the obstacle, that is, the size of the human body. It is determined whether or not the laser driving signal of the alarm driving unit 27 is determined.
    That is, the laser receiver 26 amplifies a laser beam reflected by an obstacle present in front of the host vehicle to a predetermined magnitude and then receives a signal higher than a reference voltage in comparison with a predetermined reference voltage to receive the microprocessor 20. As an example, a high potential signal is output to the obstacle detection signal, and the microprocessor 20 determines the size of the obstacle by counting the number of high potential signals continuously input from the laser receiver 26. That is, the type of obstacle is determined by comparing whether the number of signals continuously received from the laser receiver 26 corresponds to the vehicle width of the vehicle or the number corresponding to the size of the human body.
    When the microprocessor 20 determines that the human body exists in front of the vehicle according to the detection result of the infrared receiver 23 and the laser receiver 26, the microprocessor 20 alerts the driver to the driver through the alarm driver 27. Safe driving can be induced.
    On the other hand, even when the presence of an obstacle in front of the vehicle is detected by the infrared sensor 22 due to the temperature change in front of the vehicle, the number of laser beams received through the laser receiver 26 corresponds to the size of the human body. Otherwise, it is judged that the infrared sensor malfunctions due to the geothermal heat on the surface of the road heated by heat or solar heat emitted from the exhaust pipe of the preceding vehicle, so as not to generate an alarm.
    Although not described in the above configuration, in addition to the configuration of the front obstacle detecting apparatus according to the present invention automatically operates the brake under the control of the microprocessor, if it is determined that the human body exists within a predetermined distance in front of the host vehicle automatically operates the brake It may be configured to provide convenience to the driver by reducing the vehicle speed.
    As described above, the heat generated from the exhaust pipe of the preceding vehicle and the road surface are heated by determining the type of obstacle existing in front of the vehicle by using the infrared sensor and the laser radar by the vehicle front obstacle detecting device according to the present invention. By preventing the malfunction of the infrared sensor due to the accurate alarm by detecting the human body in front of it can increase the reliability of the device, it is possible to provide the effect of promoting the safe operation of the driver.
    权利要求:
    Claims (3)
    [1" claim-type="Currently amended] The front of the vehicle is equipped with an infrared sensor for transmitting an infrared signal to the front of the vehicle and judges the presence of the human body according to the presence or absence of the infrared signal received by the reflection and alerts when the human body is within a predetermined distance in front of the vehicle. In the obstacle detecting device,
    A laser radar which transmits a laser beam toward the front of the host vehicle and simultaneously receives the laser beam reflected by an obstacle while driving the infrared sensor 22;
    On the basis of the detection result of the infrared sensor 22 and the laser radar to determine the type according to the presence and size of the obstacle in front of the vehicle, and if it is determined that the obstacle is a person, the microprocessor 20 for alerting the driver Front obstacle detection device of a vehicle, characterized in that provided.
    [2" claim-type="Currently amended] The method of claim 1, wherein the laser radar continuously transmits the laser beam in a predetermined unit time at a predetermined unit time, and determines the size of the obstacle by counting the number of laser beams reflected and received by the obstacle. Front obstacle detection device of the car.
    [3" claim-type="Currently amended] 3. The laser diode according to claim 1 or 2, wherein the laser radar comprises: a laser diode 25 for emitting a laser beam against the front of the vehicle;
    A laser diode driver 24 for turning on or off the laser diode 25 at a predetermined time period;
    And a laser receiver (26) for detecting a signal received by being reflected from an obstacle after being emitted from the laser diode (25).
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1996-12-24|Application filed by 오상수, 만도기계 주식회사
    1996-12-24|Priority to KR1019960071749A
    1998-09-25|Publication of KR19980052729A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019960071749A|KR19980052729A|1996-12-24|1996-12-24|Vehicle Obstacle Detection Device|
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