JPH10217839A - Auto-light control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a head lamp from lighting up as malfunction when a vehicle passes under an overhead railroad, etc. SOLUTION: An auto-light control device is configured so that a headlight 19a is lighted up in case the sensor voltage is below the specified voltage level for lighting up the headlight while the headlight 19a is put off in case the sensor voltage is above the specified voltage level for putting off the headlight, wherein a sunshine sensor 21 senses the incident photo-quantity as the sensor voltage, and a distance measuring part 24 measures the car running distance from the time the given sensor voltage, which was above the headlight put-off level, has become the light-up level, and when the specified running distance is measured, a lamp control part 27 lights up the headlight at the end of measurement of the running distance in case the given sensor voltage is below the specified light-up level, and puts off the headlight in case the sensor voltage exceeds the light-up level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auto light control device for a vehicle having an auto light function, which prevents head lamps from being erroneously turned on when passing under an overpass or the like.

[0002]

2. Description of the Related Art Currently, vehicles are equipped with an auto light control device having an auto light function. FIG. 4 shows an auto light control device having this auto light function.

In FIG. 4, when a vehicle is running, an auto light switch 11 is turned on, and a solar radiation sensor 13 outputs a solar radiation sensor voltage signal of a magnitude corresponding to the amount of solar radiation to a controller 15.

In the controller 15, when the solar radiation sensor voltage signal is within the headlamp lighting voltage and tail lamp lighting voltage range C as shown in FIG.
7, the head lamp 19 and the tail lamp (not shown) are turned on.

On the other hand, when the solar sensor voltage signal is within the headlamp extinguishment voltage and the taillamp extinguishment voltage range A, the controller 15 turns off the head relay 17 to extinguish the headlamp 19 and the taillamp.

When the solar sensor voltage signal is within the headlamp extinguishing voltage and the taillamp lighting voltage range B, the controller 15 turns off the head relay 17, turns off the headlamp 19, and turns on the taillamp. .

That is, when the surroundings are dark, the headlamp 19 is turned on, and when the surroundings are bright, the headlamp 19 is turned off.

[0008]

However, when the vehicle passes under the overpass in a state where the tail lamp and the head lamp 19 are turned off (the surroundings are bright) while the vehicle is running with the auto light on, the insolation sensor 13 becomes overdriven. react. For this reason, the headlamp 19 is erroneously turned on under the overpass. Therefore, there has been a demand for a device capable of preventing the head lamp 19 from being erroneously turned on due to an elevated structure.

An object of the present invention is to provide an automatic light control device capable of preventing a head lamp from being erroneously turned on when the vehicle passes under an elevated road in a vehicle having an automatic light function.

[0010]

The present invention employs the following means in order to solve the above-mentioned problems. The invention of claim 1 is
The headlight is turned on when the sensor voltage corresponding to the amount of incident light is mounted on the vehicle and is equal to or lower than the headlight lighting voltage, and the sensor voltage is equal to or higher than the headlight extinguishing voltage that is larger than the headlight lighting voltage. In an automatic light control device that turns off the headlight in a case, a detection unit that detects the amount of incident light as the sensor voltage, and a state in which the sensor voltage detected by the detection unit is equal to or higher than the headlight extinguishing voltage Measuring means for measuring a predetermined traveling distance of the vehicle from the time when the headlight lighting voltage is reached; and a sensor voltage detected by the detection means when the predetermined traveling distance is measured, the headlight lighting voltage In the following case, there is provided a lighting control means for turning on the headlight from the end of the measurement of the traveling distance and keeping the headlight off as it is when the sensor voltage exceeds the headlight lighting voltage. The features.

According to the present invention, the detecting means detects the amount of incident light as a sensor voltage, and the measuring means determines whether the detected sensor voltage is higher than the headlight turning-off voltage and the headlight lighting voltage. A predetermined running distance is measured from the time when it becomes true.

[0012] When the predetermined traveling distance is measured, the headlamp control means sets the headlight from the end of the traveling distance measurement when the sensor voltage detected by the detecting means is equal to or lower than the headlight lighting voltage. Is turned on, and when the sensor voltage exceeds the headlight lighting voltage, the headlight is kept off as it is.
Therefore, even if the vehicle passes under the overpass with the headlights turned off, the headlights do not turn on incorrectly.

According to a second aspect of the present invention, the measuring means calculates the predetermined traveling distance by counting pulses of a speed detection signal from a vehicle speed sensor for detecting the speed of the vehicle.

According to the present invention, the predetermined traveling distance can be calculated by counting the pulses of the speed detection signal from the vehicle speed sensor for detecting the speed of the vehicle by the measuring means.

According to a third aspect of the present invention, when the sensor voltage corresponding to the amount of incident light is equal to or lower than the headlight lighting voltage, the headlight is turned on and the sensor voltage is set to be lower than the headlight lighting voltage. In the automatic light control device that turns off the headlight when the headlight turn-off voltage is equal to or more than a large headlight turn-off voltage, a detection unit that detects the incident light amount as the sensor voltage, and the sensor voltage detected by the detection unit is A counting means for counting a predetermined time from when the headlight lighting voltage becomes equal to or higher than the headlight turning-off voltage, and a sensor voltage detected by the detection means when the predetermined time is counted. A headlight that turns on the headlight from the end of counting of the predetermined time when the headlight lighting voltage is equal to or lower than the headlight lighting voltage and maintains the headlight as it is when the sensor voltage exceeds the headlight lighting voltage. Control hand Characterized in that it comprises and.

According to the present invention, the detecting means detects the amount of incident light as a sensor voltage, and the counting means determines that the detected sensor voltage is equal to or higher than the headlight turning-off voltage and the headlight turning-on voltage. A predetermined time is counted from the time when it becomes.

When the predetermined time is counted, when the sensor voltage detected by the detecting means is equal to or lower than the headlight lighting voltage, the headlight control means starts the headlight lighting from the end of the predetermined time counting. Is turned on, and when the sensor voltage exceeds the headlight lighting voltage, the headlight is kept off as it is. Therefore, even if the vehicle passes under the overpass with the headlights turned off, the headlights do not turn on incorrectly.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic light control device according to the present invention will be described below. FIG. 1 shows a configuration diagram of the automatic light control device.

This auto light control device is mounted on a vehicle (not shown) and turns on the head lamp 19a when the surroundings are dark, turns off the head lamp 19a when the surroundings are bright, and Erroneous lighting of the head lamp 19a when the vehicle passes through the vehicle.

The automatic light control device includes an automatic light switch 11, a solar radiation sensor 13 as a detecting means, a controller 23, a head relay 17, and a head lamp 19.
a, a tail lamp 19b, and a vehicle speed sensor 21.

The auto light switch 11 is turned on during auto light. The solar radiation sensor 13 detects the amount of incident light and outputs a solar radiation sensor voltage signal having a magnitude corresponding to the amount of solar radiation to the controller 23.

The controller 23 includes a distance measuring unit 24 as a measuring unit, a timer 25 as a counting unit, a voltage judging unit 26, and a lamp control unit 27 as an illumination control unit. On the output side of the lamp controller 27, a head relay 17a is provided.
And one end of the electromagnetic coil L2 of the tail relay 17b. These electromagnetic coils L
The power supply + B is supplied to the other ends of the power supply terminals 1 and L2.

The power supply + B is connected to common terminals a1 and a2, and the common terminal a1 is connected to a contact piece 18a.
The contact piece 18b is connected to the common terminal a2. Contact piece 18a
Is connected to the terminal b1 or the terminal c1 by the output from the lamp control unit 27.

The contact piece 18b is connected to the terminal b2 or the terminal c2 by an output from the lamp control unit 27. Terminal c
1 is connected to a headlamp 19a, and the terminal c2 is connected to a tail lamp 19b.

The voltage judging section 26 receives the solar radiation sensor voltage signal from the solar radiation sensor 13 and, as shown in FIG. It is determined whether or not the state is equal to or lower than the lighting voltage or the headlamp lighting voltage.

The timer 25 counts time, and as shown in FIG. 2, the time t when the solar radiation sensor voltage signal becomes the tail lamp lighting voltage and the head lamp lighting voltage.
A predetermined time is counted from 2.

The vehicle speed sensor 21 is mounted on the vehicle and detects the speed of the vehicle. The distance measuring unit 24 measures a predetermined traveling distance of the vehicle from time t2 when the solar radiation sensor voltage signal becomes the tail lamp lighting voltage and the head lamp lighting voltage, and detects a rising pulse from a speed detection signal from the vehicle speed sensor 21. Count and measure a predetermined mileage of the vehicle.

The voltage judging section 26 determines whether the solar radiation sensor voltage signal detected by the solar radiation sensor 13 when the predetermined traveling distance of the vehicle is measured is higher than the headlamp extinguishing voltage and lower than the tail lamp lighting voltage. Determine whether it is voltage.

As a result of the determination by the voltage determining unit 26, when the predetermined traveling distance is measured, the lamp control unit 27 determines whether the solar radiation sensor voltage signal is equal to or higher than the headlamp extinguishing voltage and equal to or lower than the tail lamp lighting voltage. The tail relay 17b is driven to turn on only the tail lamp 19b without turning on the head lamp 19a.

As a result of the determination by the voltage determination unit 26, when the predetermined traveling distance is measured, the lamp control unit 27 determines whether the solar radiation sensor voltage signal is lower than the headlamp lighting voltage and lower than the tail lamp lighting voltage. The head lamp 19a is turned on after a predetermined traveling distance measurement has elapsed.

The timer 25 clears the count value when a predetermined traveling distance is measured as a result of the determination by the voltage determining unit 26.

Next, the operation of the thus configured auto light control device of the present invention will be described with reference to FIG.
This will be described with reference to the timing chart shown in FIG.

First, when the vehicle has traveled the predetermined traveling distance, the solar radiation sensor voltage signal has a voltage not lower than the headlamp extinguishing voltage and not higher than the taillamp lighting voltage (a condition in which the surroundings have become brighter in order to get out of an elevated state). Is described with reference to FIGS. 1 and 2.

First, before time t1, the voltage determination unit 26 receives the solar sensor voltage signal from the solar sensor 13 and determines that the solar sensor voltage signal is higher than the headlamp extinguishing voltage and higher than the tail lamp extinguishing voltage (range A). It is determined whether or not.

When the solar radiation sensor voltage signal is higher than the headlamp extinguishing voltage and higher than the tail lamp extinguishing voltage, the lamp controller 27 drives the head relay 17a and the tail lamp 19b. That is, the headpiece 19a is turned off by connecting the contact piece 18a to the terminal b1, and the tail lamp 19b is turned off by connecting the contact piece 18b to the terminal b2.

Next, when the time from time t1 to time t2 is reached, the insolation sensor voltage signal from the insolation sensor 13 is equal to or lower than the headlamp lighting voltage and lower than the tail lamp lighting voltage (a state in which the vehicle is going to pass under an overpass, ie The voltage in the dark state range C) is input to the voltage determination unit 26. Then, the timer 25 counts a predetermined time from the time t2. For example, 3 seconds is set as the predetermined time.

Next, the distance measuring section 24 is connected to the vehicle speed sensor 2.
The rising pulse edge from 1 is counted and a predetermined traveling distance of the vehicle is measured.

Further, when a predetermined traveling distance, for example, 10 m, is measured (time t5), the voltage determining unit 23 outputs the solar radiation sensor voltage signal detected by the solar radiation sensor 13 to:
It is determined whether or not the voltage is not lower than the headlamp turn-off voltage and not higher than the tail lamp turn-on voltage (a state range B in which the surroundings have become brighter in an attempt to get out of the overpass).

When the predetermined mileage is measured, the insolation sensor voltage signal is a voltage not lower than the headlamp turn-off voltage and not higher than the tail lamp turn-on voltage as shown in FIG. The control signal is output to the head relay 17a and the tail relay 17b, and the head lamp 19a is not turned on, but the contact piece 18b in the tail relay 17b is connected to the terminal c2 to turn on only the tail lamp 19b.

Therefore, while the vehicle is running during the auto light operation,
In the state where the tail lamp and the headlamp are off (the surroundings are bright), even if the vehicle passes under the overpass, the headlamp 19 is not turned on.
a does not turn on incorrectly.

Next, with reference to FIGS. 1 and 3, a case where the solar radiation sensor voltage signal is a voltage lower than the headlamp lighting voltage and lower than the tail lamp lighting voltage when the vehicle has traveled the predetermined traveling distance will be described. Will be explained. The operation before time t2 is the same as the operation described with reference to FIG. 2, and thus the description thereof will be omitted, and the operation after time t2 will be described here.

First, at time t1 from time t1, a voltage equal to or lower than the headlamp lighting voltage and lower than the tail lamp lighting voltage is input to the voltage determination unit 26 as a solar radiation sensor voltage signal from the solar radiation sensor 13. Then, the timer 25 counts a predetermined time from the time t2.

Next, the distance measuring section 24 is connected to the vehicle speed sensor 2.
The rising pulse edge from 1 is counted and a predetermined traveling distance of the vehicle is measured.

Further, when the predetermined traveling distance is measured (time t6), the voltage determining unit 23 detects the insolation sensor 1
It is determined whether the voltage signal of the solar radiation sensor detected in step 3 is equal to or higher than the headlamp turn-off voltage and equal to or lower than the tail lamp turn-on voltage (range B).

When the predetermined travel distance is measured, the voltage signal of the solar radiation sensor is lower than the headlamp lighting voltage and lower than the tail lamp lighting voltage (range C). Headlamp 1
9a is turned on.

That is, even if the vehicle travels a predetermined traveling distance, if the solar radiation sensor voltage signal is equal to or lower than the headlamp lighting voltage, the vehicle does not pass under the overpass. Light 19a.

In some cases, it is impossible to determine the predetermined traveling distance of the vehicle. For example, when the vehicle stops under the overpass, or when the vehicle speed sensor 21 breaks down. In this case, the vehicle speed sensor 21 and the distance measurement unit 2
The determination process may be performed only with a predetermined count time from the timer 25 without using the step S <b> 4.

That is, a predetermined count time (for example, 3
(Seconds) is counted (time t5, t6), the voltage determining unit 23 determines that the solar radiation sensor voltage signal detected by the solar radiation sensor 13 is higher than the headlamp extinguishing voltage and lower than the tail lamp lighting voltage (range B). Determine whether the voltage.

At the time when the predetermined count time is counted (time t5, FIG. 2), the voltage of the solar radiation sensor voltage is equal to or higher than the headlamp turn-off voltage and lower than the tail lamp turn-on voltage (range B). The control unit 27 transmits the lamp control signal to the head relay 17a and the tail relay 17
b, the headlamp 19a is not turned on, the contact piece 18b in the tail relay 17b is connected to the terminal c2, and only the tail lamp 19b is turned on.

When the predetermined count time is counted (time t6, FIG. 3), since the solar sensor voltage signal is lower than the headlamp lighting voltage and lower than the tail lamp lighting voltage (range C), the lamp control unit 27 Then, the head lamp 19a is turned on after the lapse of a predetermined traveling distance measurement.

That is, a predetermined traveling distance and a predetermined count of the timer 25 from the time when the sensor voltage detected by the distance measuring unit as the measuring means becomes the headlight lighting voltage from the state of being equal to or higher than the headlight turning-off voltage. The time is operated simultaneously, and when either of them reaches a predetermined value, the solar radiation sensor voltage is determined.

Therefore, if such timer management is performed, the headlamp does not light up because the vehicle speed is not detected.

In the embodiment, the value of the predetermined traveling distance is set to 10 m and the predetermined time is set to 3 seconds. However, these values may be changed to other values.

Further, in the embodiment, the headlamp 19a and the tail lamp 19b are turned on or off by comparing the solar sensor voltage signal with the headlamp turn-off voltage, the headlamp turn-on voltage, the tail lamp turn-off voltage, and the tail lamp turn-on voltage. However, the headlamp 19a may be turned on or off by comparing the solar sensor voltage signal with the headlamp extinguishing voltage and the headlamp lighting voltage.

In this case, the voltage determining unit 26 determines whether the solar radiation sensor voltage signal has changed from a state where the voltage is higher than the headlamp extinguishing voltage to a state where the voltage is lower than the headlamp lighting voltage. The timer 25 counts a predetermined time from time t2 when the solar radiation sensor voltage signal becomes the headlamp lighting voltage.

The distance measuring section 24 measures a predetermined traveling distance of the vehicle from time t2 when the solar radiation sensor voltage signal becomes the tail lamp lighting voltage. The voltage determination unit 26 determines whether the solar radiation sensor voltage signal is a voltage equal to or lower than the headlamp lighting voltage when a predetermined traveling distance of the vehicle is measured.

The lamp controller 27 does not turn on the headlamp 19a if the solar radiation sensor voltage signal exceeds the headlamp lighting voltage when a predetermined traveling distance is measured.

The lamp control unit 27 turns on the headlamp 19a when the predetermined mileage is measured and the irradiance sensor voltage signal is equal to or less than the headlamp lighting voltage when the predetermined mileage is measured. Even in this case, the same effect as in the embodiment can be obtained.

[0059]

According to the present invention, the detecting means detects the amount of incident light as a sensor voltage, and the measuring means turns on the headlight from a state where the detected sensor voltage is equal to or higher than the headlight extinguishing voltage. The counting means is operated at the same time that a predetermined traveling distance is measured from the time when the voltage is reached.

Then, when a predetermined traveling distance is measured (for example, a traveling distance of 10 m) or when a predetermined time is counted (for example, for a predetermined time of 3 seconds), the illumination control means is detected by the detection means. When the sensor voltage is equal to or lower than the headlight lighting voltage, the headlight is turned on from the end of the measurement of the traveling distance, and when the sensor voltage exceeds the headlight lighting voltage, the headlight is kept off as it is. Therefore, even if the vehicle passes under the overpass with the headlights turned off, the headlights do not turn on incorrectly.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of an automatic light control device of the present invention.

FIG. 2 is a timing chart for explaining a first operation example of the automatic light control device.

FIG. 3 is a timing chart for explaining a second operation example of the automatic light control device.

FIG. 4 is a diagram showing a configuration of a conventional auto light control device.

FIG. 5 is a timing chart for explaining the operation of a conventional auto light control device.

[Explanation of symbols]

 Reference Signs List 11 auto light switch 13 solar radiation sensor 15, 23 controller 17a head relay 17b tail relay 18 contact piece 19a head lamp 19b tail lamp 21 vehicle speed sensor 24 distance measuring unit 25 timer 26 voltage determining unit 27 lamp control unit

Claims (3)

[Claims] 1. A headlight which is mounted on a vehicle and turns on a headlight when a sensor voltage corresponding to an incident light amount is equal to or lower than a headlight lighting voltage, and the sensor voltage is higher than the headlight lighting voltage. An automatic light control device that turns off a headlight when the voltage is equal to or higher than a light-off voltage, a detection unit that detects the incident light amount as the sensor voltage, and a sensor voltage detected by the detection unit turns off the headlight. A measuring means for measuring a predetermined traveling distance of the vehicle from a time when the headlight lighting voltage is changed from a state of not less than a voltage, and a sensor voltage detected by the detecting means when the predetermined traveling distance is measured. Lighting control for turning on the headlight from the end of the measurement of the traveling distance when the voltage is equal to or lower than the headlight lighting voltage, and for maintaining the headlight as it is when the sensor voltage exceeds the headlight lighting voltage. hand An automatic light control device, comprising: a step; 2. The automatic light control according to claim 1, wherein said measuring means calculates said predetermined traveling distance by counting pulses of a speed detection signal from a vehicle speed sensor for detecting a speed of said vehicle. apparatus. 3. A headlight which is mounted on a vehicle and turns on the headlight when the sensor voltage corresponding to the amount of incident light is equal to or lower than the headlight lighting voltage, and the sensor voltage is higher than the headlight lighting voltage. An automatic light control device that turns off a headlight when the voltage is equal to or higher than a light-off voltage, a detection unit that detects the incident light amount as the sensor voltage, and a sensor voltage detected by the detection unit turns off the headlight. A counting means for counting a predetermined time from when the headlight lighting voltage is changed to a voltage equal to or higher than a voltage, and a sensor voltage detected by the detection means when the predetermined time is counted, the headlight lighting voltage An illumination control means for illuminating the headlamp from the end of the counting of the predetermined time in the case of the following, and for maintaining the off state of the headlamp as it is when the sensor voltage exceeds the headlamp lighting voltage, Be prepared And an automatic light control device.