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    • 6. 发明授权
    • Warning device for vehicles against an approaching objects
    • 车辆对接近物体的警告装置
    • US4825211A
    • 1989-04-25
    • US108590
    • 1987-10-14
    • Byung-Young Park
    • Byung-Young Park
    • B60Q1/52G01S17/93G08G1/00
    • G01S17/936B60Q9/008
    • A warning device for use on a vehicle for sensing an approaching object when the vehicle is moving backward. The device produces a first signal when the object is in remote proximity of the vehicle and at least a second signal when the object is in close proximity of the vehicle. The device has a circuit for emitting intermittent infrared light when the vehicle is moving backward and a circuit for receiving the infrared light reflected from the object. The circuit for receiving produces a receive signal indicative of the received infrared light. The device further has an output of the circuit for receiving connected to two inverting inputs of both first and second differential amplifiers, inverting inputs of the first and second differential amplifiers being connected by a first and second variable resistors, respectively, to an applied voltage. First and second outputs of the first and second differential amplifiers, respectively, are connected to first and second inputs of an AND gate. An output of the AND gate is connected to a circuit for producing the second signal and the output of the first differential amplifier is connected to a circuit for producing the first signal.
    • 一种在车辆向后移动时用于感测接近物体的警告装置。 当物体远离车辆时,该设备产生第一信号,并且当物体处于车辆附近时,至少产生第二信号。 该装置具有用于当车辆向后移动时发出间歇性红外线的电路和用于接收从物体反射的红外线的电路。 用于接收的电路产生指示所接收的红外光的接收信号。 该装置还具有用于接收的电路的输出,连接到第一和第二差分放大器的两个反相输入,第一和第二差分放大器的反相输入分别由第一和第二可变电阻器连接到施加的电压。 第一和第二差分放大器的第一和第二输出分别连接到与门的第一和第二输入端。 与门的输出连接到用于产生第二信号的电路,并且第一差分放大器的输出连接到用于产生第一信号的电路。