JPH0554091U - Vehicle rearview mirror device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a room mirror device for a vehicle, which can detect a pedestrian on the road or a person crossing it from inside a running vehicle. A far-infrared detection circuit for detecting a human body, which includes a current collecting element 9, is provided in a vehicle room mirror. The mirror body 2 has a built-in warning circuit composed of a light emitting diode 7, a buzzer 10 and the like for issuing a warning to the vehicle driver when a human body is detected by the current collecting element 9.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accessory device for a vehicle room mirror, and more particularly to a vehicle room mirror device that can detect a human body crossing a road from inside a vehicle while traveling.

[0002]

[Prior Art]

 Under good weather conditions in the daytime, checking a human body that is walking or standing still in front of the road from a running vehicle is not an obstacle to driving. However, in special weather conditions, such as rainfall, fog, cloudy weather, nighttime, or the combination of these, leading to poor visibility, people who are walking on or crossing the road ahead may experience delays and may not be worn. In some cases, it was difficult to determine the color density and color tone of the clothing.

[0003]

[Problems to be solved by the device]

 Since no special measures have been taken against the above matters so far, it was found that an unexpected accident could occur. The present invention is inexpensive and more efficient by providing a device capable of detecting a person crossing the road from the inside of the vehicle while the room mirror is in the optimal mounting position from the viewpoint that the driver can take appropriate measures. It is an object of the present invention to provide a vehicle room mirror device for human body detection that functions as described above.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a far-infrared detecting circuit for human body detection, which is composed of a current collecting element, in a vehicle room mirror. In addition, the current collecting element has a structure in which a warning circuit including a light emitting diode, a buzzer, and the like for issuing a warning to a vehicle driver when a human body is detected is built in the mirror.

[0005]

[Action]

 If a person crosses the road ahead of the vehicle while the vehicle is running, the far-infrared ray detection circuit for human body detection built in the room mirror detects the human body and the A warning signal, which is also built into the inside of the vehicle, is activated to activate a light emitting diode or a buzzer to issue a warning signal to the driver of the vehicle. The driver can take appropriate action promptly without overlooking or overlooking the warning signal emitted from the room mirror located in a place where it is easily noticeable in the passenger compartment and is easy to hear and hear. Will be taken.

[0006]

【Example】

 The present invention will be described below with reference to the drawings based on embodiments. FIG. 1 is an electrical block diagram showing an embodiment of a far-infrared ray detecting circuit and a warning circuit for detecting a human body incorporated in a vehicle room mirror device of the present invention, and FIG. 2 is a block diagram showing the detection circuit and the warning circuit. FIG. 3 is an enlarged vertical cross-sectional view taken along the line AA of FIG. 2 showing a partially broken front view showing an example of the vehicle room mirror device. In the figure, 1 is a body, 2 is a body, 3 is a mirror, 4 is an antiglare switching lever, 5a is an amplifier, 5b is a signal processing circuit, 6 is a circuit switch, and 7 is a light emitting diode for warning ( LED), 8 is a Frennel lens, 9 is a current collecting element, 10 is a buzzer, and 11 is a drive circuit.

As shown in FIG. 1, a far-infrared detecting circuit for detecting a human body incorporated in a vehicle room mirror device of the present invention comprises a Frennel lens 8, a current collecting element 9, an amplifier 5a, and a signal processing circuit 5b. It consists of and. The amplifier 5a and the signal processing circuit 5b are mounted on the PC board 5 fixed inside the mirror body 2.

The Fresnel lens 8 required for increasing the detection distance is a condensing system that collects far infrared energy and guides it to the current collecting element 9, and is configured so that far infrared energy is well transmitted. The current collecting element 9 is a thermal sensor, and has a bandpass characteristic of 7 to 15 μm because the wavelength of far infrared rays emitted from the human body at a body temperature of about 30 ° C. has a peak of 9 to 10 μm. An optical Hirta is provided to deal with temperature changes near the human body temperature. The signal processing circuit 5b is a circuit that determines whether or not the signal from the current collecting element is from the human body. The warning circuit includes a drive circuit 11 for inputting a signal from the detection circuit to drive the buzzer 10 or the light emitting diode (LED) 7 and the buzzer 10 and the LED 7 connected to the output terminal thereof. Configured.

The pattern of mounting the detection circuit and the warning circuit on the room mirror is shown in FIGS. 2 and 3. As shown in the figure, when far-infrared energy from the human body is input to the collector element 9 from the rear surface of the mirror through the light collecting system 8, the buzzer sound of the buzzer 10 is output from the left rear surface of the mirror. The notification LED 7 emits light from the bottom right of the mirror.

In the vehicle room mirror device of the present invention, the far infrared ray having a peak wavelength value of 9 to 10 μm is a typical light source and has 0.5 μm and 0.6 μm. , 0. Since it has a different light emission distribution than sunlight, incandescent lamps, and fluorescent lamps each having a peak wavelength value of 9 μm, it is not affected by fluorescent lamps. Moreover, the influence of sunlight and incandescent light bulbs is small, and far infrared rays from the human body can be efficiently detected. In addition, when the detection circuit detects a human body and the built-in warning circuit is activated, the driver can hear the buzzer sound from the back of the mirror or check the brightness of the notification LED at the bottom right of the mirror. The driving of the vehicle can be controlled to ensure safe driving.

[0011]

[Effect of the device]

 In the present invention, the far-infrared ray detection circuit for human body detection and the warning circuit are built inside the room mirror at a high mounting position, so that the driver's view is not obstructed. Further, since the detection circuit and the warning circuit are provided in the room mirror inside the vehicle, a waterproof structure is unnecessary. Since the circuit group is built in the room mirror, the wiring can be reduced and the cost can be kept low. Moreover, since the warning buzzer and LED are provided in the mirror, It works most efficiently for warning confirmation.

[Submission date] February 26, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

The Fresnel lens 8 required for increasing the detection distance is a light-collecting system that collects far-infrared energy and guides it to the current collecting element 9. The far-infrared energy is well transmitted. Collector element 9 is a thermal sensor, an optical wavelength of far-infrared rays emitted from the human body of a human body temperature of about 30 ° C. The single lifting the bandpass characteristics of 7~15μm to have a peak of 9~10μm Fi It is designed to handle temperature changes near the human body temperature. The signal processing circuit 5b is a circuit that determines whether or not the signal from the current collecting element is from the human body. The warning circuit comprises a drive circuit 11 for inputting a signal from the detection circuit to drive the buzzer 10 or a light emitting diode (LED) 7, and the buzzer 10 and the LED 7 connected to the output terminal thereof.

[Brief description of drawings]

FIG. 1 is an electrical block diagram showing an embodiment of a far-infrared ray detection circuit for human body detection and a warning circuit incorporated in a vehicle room mirror device of the present invention.

FIG. 2 is a partially cutaway front view showing an embodiment of a vehicle room mirror device incorporating the detection circuit and the warning circuit.

FIG. 3 is an enlarged vertical sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Steering 2 Mirror body 3 Mira 4 Anti-glare switching lever 5 PC board 5a Amplifier 5b Signal processing circuit 6 Circuit switch 7 Light emitting diode 8 Fresnel lens 9 Current collecting element 10 Buzzer 11 Driving circuit

Claims (2)

[Scope of utility model registration request] 1. A vehicular room mirror device comprising a vehicular room mirror provided with a far-infrared ray detecting circuit for detecting a human body, the circuit comprising a current collecting element. 2. A warning circuit comprising a light emitting diode, a buzzer, and the like for issuing a warning to a vehicle driver when a human body is detected by the current collecting element is incorporated in the mirror. 1. The vehicle room mirror device according to 1.