KR19980083894A - Photo-sensing vehicle brake light failure detection device and method - Google Patents

Abstract

The present invention relates to a photo-sensing vehicle brake lamp failure detection device and method for detecting a failure such as disconnection and short circuit of the brake lamp by sensing the light emitted when the automobile brake light is turned on. The apparatus of the present invention for this purpose is installed in close proximity to the brake light and the light sensing sensor means for outputting a predetermined signal according to the emitted light when the brake light is turned on, the on / off signal of the switch to turn on the brake light and the light A control means for receiving an output signal of the sensing sensor means and outputting a predetermined signal when the brake light is not turned on when the switch is turned on, and being turned on / turned off according to the output signal of the control means And switching means and fault indication means which are activated when the switching means are turned on to display a fault state of the brake light, and the method of the present invention is switched on to turn off the braking light of the vehicle. A first step of determining whether and if the brake light switch is turned on in the first step, emission light is generated from the brake light. And a third step of detecting a false value, and performing a brake light failure indication when the emission light of the brake light is not detected in the second step, and maintaining a normal operation state of the brake light when the emission light is detected. It features. As such, the present invention provides the advantage of improving the convenience of the motor vehicle.

Description

Photo-sensing vehicle brake light failure detection device and method

The present invention relates to a failure detection apparatus and method for a vehicle brake light, and more particularly, to a light sensing vehicle brake light failure detection device and method for detecting a failure such as disconnection and short circuit of a brake light by detecting light emitted when the automobile brake light is turned on. It is about.

In general, an automobile is provided with an equalizing device as a means for promoting safe driving, such an equalizing device is divided into lighting, signaling, warning, display, etc. according to the purpose of use. Here, the equalizer used for signaling is to inform the surrounding vehicles of their progress, which does not recognize the progress of the vehicle driving in front of the rear or the vehicle driving on both left and right sides. It is intended to prevent accidents that may occur due to failure, and the signal lamp is divided into a turn signal and a brake light (braking light). Fig. 1 schematically shows the appearance of a brake lamp of a signal equalizer.

Referring to Figure 1, the braking light 20 is installed on both the left and right sides of the rear end of the vehicle, the purpose is to recognize the braking of the vehicle coming along the rear end to reduce the vehicle to secure a safety distance with the vehicle This is to prevent collision accidents by operating the vehicle. This brake light is turned on and off by the on / off operation of the brake switch 10 which shorts the battery B power supply as shown in FIG. 2, and the switch 10 is operated through the brake pedal.

Such a conventional brake light is connected to the brake light circuit by the brake switch 10 connected to the brake pedal when the driver presses the brake pedal while the vehicle is driving. That is, when the brake switch 10 is turned on, the power of the battery B is applied to the brake light 20 so that the brake light is turned on. On the contrary, when the brake switch 10 is turned off, that is, when the brake is released, the brake light circuit is opened to open the brake light. 20 is turned off.

By the way, when the braking light 20 is turned on as described above, there is a problem that the driver cannot easily identify whether the braking light 20 is turned on in the vehicle. For example, if the brake lights installed on both sides of the rear of the vehicle are disconnected or short-circuited and the brake lights 20 are not turned on, a third party should come out of the car and check whether the brake lights are turned on while the driver is pressing the brake pedal. There was an uncomfortable problem.

The present invention was created in order to solve the above problems, a light-sensing vehicle braking lamp for detecting the failure of the brake light does not light due to the cause, such as disconnection and short circuit of the brake light by sensing the light emitted when the automobile brake light is turned on It is an object of the present invention to provide a failure detection apparatus and method thereof.

1 is a perspective view showing an appearance of an automobile brake light,

2 is a circuit diagram showing a circuit configuration of a conventional automobile brake lamp device;

3 is a block diagram showing a failure detection device for a photosensitive automobile brake light according to the present invention,

4 is a flowchart of a method for detecting a failure of a photosensitive automobile brake light according to the present invention.

Explanation of symbols for main parts of the drawings

1: light sensing unit 2: AND gate

3: light emitting lamp 4: buzzer

5: transistor 10: brake light switch

11: phototransistor 12: inverter

20: braking light

In order to achieve the above object, the light detecting vehicle brake light fault detecting device according to the present invention,

In the photosensitive automobile brake light failure detection device for detecting a state in which the brake light does not light due to a breakdown or short circuit of the automobile brake light,

A light sensing sensor means installed near the brake light and outputting a predetermined signal according to the lit light when the brake light is turned on, an on / off signal of a switch for turning on the brake light and an output signal of the light sensing sensor means Control means for outputting a predetermined signal when the brake light is not turned on while the switch is turned on, switching means for turning on / turning off according to an output signal of the control means, and It is characterized in that it comprises a fault display means which is operated at turn-on to indicate a fault condition of the brake light.

In a preferred embodiment of the present invention, the photosensitive sensor means,

A phototransistor which is turned on by the light to output a high signal when the brake light is turned on and emits light; otherwise, a phototransistor for outputting a low signal while maintaining a turn-off state and a series connection to a rear end of the phototransistor And an inverter for inverting and outputting a predetermined input signal.

In a preferred embodiment of the present invention, the control means outputs a high signal when a high signal is received from the brake light switch and the light sensing sensor means, and a low signal when a signal other than the above is received. An AND gate for outputting a (LOW) signal, wherein the switching means is a transistor, and the fault indicating means is a light emitting lamp (or LED) or a buzzer.

The failure detection method for a photosensitive automobile brake light achieved by the failure detection device for a photosensitive automobile brake light of the present invention,

In the photosensitive automobile brake light failure detection method for detecting a state in which the brake light does not light due to a breakdown or short circuit of the automobile brake light,

A first step of determining whether a switch for turning on and off the brake light of the vehicle is on; a second step of detecting whether a lit light is generated in the brake light when the brake light switch is turned on in the first step; and the second step When the lighting light of the brake light is not detected in the step, the brake light failure indication is performed, and if the lighting light is detected, the third step of maintaining the normal operating state of the brake light is characterized in that it comprises a.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the photo-sensing vehicle brake light failure detection device and method according to the present invention. For the sake of convenience, the same reference numerals are used for constituent members that have the same function as those used in the prior art.

The photo-sensing vehicle brake light failure detection device according to the present invention detects the light emitted when the automobile brake light is turned on and detects a state in which the brake light does not light due to a failure such as disconnection or short circuit of the brake light, and is illustrated in FIG. 3. As shown, the phototransistor 11 is installed close to the front of the brake lamp 20 and is turned on by the lit light when the brake lamp 20 is turned on, and connected to the phototransistor 11 and the collector of the phototransistor 11 to output a high signal. And an on / off signal of the light detecting sensor unit 1 including the inverter 12 for inverting and outputting the output signal of the phototransistor 11 and the brake light switch 10 for turning on the brake light 20. If the brake light 20 is not turned on while the brake light switch 10 is turned on when the output signal of the light detecting sensor unit 1 is turned on, an AND signal for outputting a predetermined signal, for example, a high signal, is output. 2, the switching transistor 5 which is turned on or off according to the output signal of the AND gate 2, and the switching transistor 5 is operated when the switching transistor 5 is turned on to indicate a failure state of the brake lamp 20. It comprises a failure display unit consisting of a light emitting lamp (or LED) 3 and a buzzer 4 to display. Here, the phototransistor 11 of the photosensitive sensor unit 1 is turned on by the light when the braking light 20 is turned on and emits light, and the light is normally turned on due to a failure in the braking light 20. If it does not emit light, it will remain turned off. Therefore, when the brake lamp 20 is turned on, the inverter 12 of the photosensitive sensor unit 1 outputs a low signal, and when the brake lamp 20 is not turned on, a high signal is output.

The AND gate 2 outputs a high signal when the ON signal is input from the brake light switch 10 and the high signal is received from the photosensitive sensor unit 1, and when a signal other than the above signal is input. Outputs a LOW signal.

In addition, in the present invention, the fault display unit may include both the light emitting lamp 3 (or the LED) and the buzzer 4, or any one of them may be selectively provided. Is preferably installed on an instrument panel (not shown) of the vehicle. Reference numerals R1 and R2 denote voltage distribution resistors for inputting a high signal to the AND gate 2 when the brake light switch 10 is turned on, and R3 and R4 denote an inverter 12 of the photosensitive sensor unit 1. When a high signal is output, it is a voltage divider resistor for inputting a high signal to the AND gate 2, and F is a fuse. Here, one end of the phototransistor 1 is connected to the ignition power source IG such that the operation of the fault display of the present invention is preferably operated only in an ignition state.

An operation of the failure detection device for a photosensitive automobile brake light according to the present invention configured as described above will be described with reference to FIG. 3.

First, referring to FIG. 3, for example, when the driver presses the brake pedal to turn on the brake light switch 10, the battery B power is applied to the brake light 20 as in the related art, and the brake light 20 is turned on. When the brake lamp 20 is turned on, the lighting light is emitted from the brake lamp 20. When the light according to the lighting of the braking lamp 20 is emitted in this way, the port transistor 11 installed on the front of the braking lamp 20 is preferably turned on by the light emitted from the braking lamp 20, and thus the inverter ( 12) outputs a low signal. When the brake light 20 is turned on and the phototransistor 11 is turned on, the ON signal of the brake light switch 10 and the low signal of the inverter 12 are applied to the AND gate 2, and a low signal is output from the output terminal. do. When the low signal is output from the AND gate 2, since the switching transistor 5 is turned off, the lamp 3 and the buzzer 4 do not operate. That is, when the braking lamp 20 is normally turned on, the fault display unit made up of the display lamp 3 and the buzzer 4 of the present invention does not operate.

However, if the braking light switch 10 is turned on and a high signal is input to one input terminal of the AND gate 2, a failure occurs in the braking light 20 and no lit light is generated. Since the inverter 11 is turned off, the inverter 12 inputs a high signal to the AND gate 2. When the high signal is input to both input terminals of the AND gate 2 as described above, the high signal is output from the output terminal. When the AND gate 2 outputs a high signal, the transistor 5 is turned on to drive the lamp 3 and the buzzer 4. That is, when a failure occurs in the braking lamp 20 and does not turn on, a failure display unit consisting of the display lamp 3 and the buzzer 4 of the present invention operates to cause a breakdown such as a short circuit or a short circuit in the braking lamp 20. Notifies the driver that the brake lamp 20 is not lit.

Thus, the device of the present invention detects the light emitted when the brake light is turned on, detects whether there is a breakdown or a short circuit of the brake light, and notifies the driver that the brake light is not turned on so that maintenance of the brake light can be timely performed. .

As described above, the method of the present invention, which is achieved by the apparatus for detecting a failure of a vehicle, such as a light-sensing vehicle braking light of the present invention, as shown in FIG. Determining the step (S10), and if the brake light switch 10 is turned on in step S10 (S20) for detecting whether the light is being emitted from the brake light (20), and in step S20 the lighting light of the brake light 20 is predetermined If it is not detected by the photosensitive sensor member of, for example, the phototransistor 11, the fault indication such as braking is performed through the failure display member such as the lamp 3 and the buzzer 4, and the photosensitive sensor member When the lighting light is detected, a step (S30) of maintaining the normal operating state of the brake lamp 20 is performed.

The operation of the failure detection method of the photosensitive brake light of the present invention configured as described above will be described with reference to FIGS. 3 and 4.

First, if the driver detects whether the brake light switch 10 is turned on (S10), and if the brake light switch 10 is turned on in step S10, the light sensor according to the lighting of the brake light 20 is light sensor such as the phototransistor 11. Detects through (S20). When the lighting light of the brake light 20 is detected by the phototransistor 11, the lighting state of the brake light 20 is maintained continuously. If the lighting light of the brake light 20 is not detected, the lamp 3 and the buzzer 4 are detected. The fault status of the brake lamp is indicated by Thus, the method of the present invention detects the light emitted when the brake light is turned on, detects the presence or absence of a breakdown and a short circuit of the brake light, and informs the driver so that maintenance of the brake light can be timely performed.

As described above, the photo-sensing vehicle brake light fault detection device and method thereof according to the present invention detects the light emitted when the automobile brake light is turned on, detects a breakdown such as disconnection and short-circuit of the brake light, and informs the driver of the failure. It provides the effect of ensuring maintenance is done in a timely manner. In addition, the present invention provides an advantage of improving the convenience of the vehicle because it is easy to know whether there is a failure, such as braking in the vehicle interior.

On the other hand, the above-described light-sensing vehicle brake light detecting device and the method of the present invention is not limited to the above embodiment and can be carried out by applying a number of manufacturing modifications without departing from the spirit and scope of the present invention.

Claims (8)

In the photosensitive automobile brake light failure detection device for detecting a state in which the brake light does not light due to a breakdown or short circuit of the automobile brake light, A light sensing sensor means installed near the brake light and outputting a predetermined signal according to the lit light when the brake light is turned on, an on / off signal of a switch for turning on the brake light and an output signal of the light sensing sensor means Control means for outputting a predetermined signal when the brake light is not turned on while the switch is turned on, switching means for turning on / turning off according to an output signal of the control means, and And a failure display means for operating at turn-on to display a failure state of the brake light. The method of claim 1, wherein the light sensor means, A phototransistor which is turned on by the light to output a high signal when the brake light is turned on and emits light; otherwise, a phototransistor for outputting a low signal while maintaining a turn-off state and a series connection to a rear end of the phototransistor And an inverter for inverting and outputting a predetermined input signal. The method of claim 1 or 2, wherein the control means outputs a high signal when the on signal of the brake light switch and the high signal of the light sensing sensor means are output, and a low signal when receiving other signals. An apparatus for detecting a failure of a light-sensing automobile braking lamp, comprising: an AND gate for outputting. The apparatus of claim 1, wherein the switching means is a transistor. The apparatus of claim 1, wherein the fault display means is a light emitting lamp. The apparatus of claim 1, wherein the fault indicating means is an LED. The apparatus of claim 1, wherein the fault indicating means is a buzzer. In the photosensitive automobile brake light failure detection method for detecting a state in which the brake light does not light due to a breakdown or short circuit of the automobile brake light, A first step of determining whether a switch for turning on and off the brake light of the vehicle is on; a second step of detecting whether a lit light is generated in the brake light when the brake light switch is turned on in the first step; and the second step And a third step of performing a brake light failure indication when the lighting light of the brake light is not detected in the step, and maintaining a normal operation state of the brake light when the lighting light is detected.