RU2555376C2 - Device for automatic switching of lighting modes - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention relates to devices for automatic switching of the lighting modes in vehicles and can be used as addition to a standard lighting system of vehicles. The device for automatic switching of lighting modes contains a photoresistor-based photosensor, a lighting mode control and switching unit, a supply voltage switch and a voltage stabiliser for use of the device in vehicles with onboard mains supply voltage both 12, and 24 V, short circuit protection, a passing beam delay switching timer, a driving beam delay switching timer, an impulse generator, an automatic external lighting control mode switch and a lighting mode switching relay. The control unit is connected directly to a terminal of driving beam switching from the manual switch of lighting modes, and the control unit outputs are connected to the passing and driving beam switching relay.

EFFECT: decrease of number of road accidents as a result of dazzling of the oncoming car drivers, at the expense of possibility of use of this device on one of the cars moving towards to each other and its correct operation irrespective of the structure of the lighting system of the oncoming car, and also its installation on all types of vehicles is achieved.

2 dwg

Description

The invention relates to a device for automatically switching lighting modes of cars and can be used as an addition to the standard lighting system of the car, which helps to reduce the number of traffic accidents as a result of blindness of the driver of an oncoming car.

A device for automatically switching lighting modes of cars (RF patent No. 2048316, IPC Р02М 65/00 dated November 20, 1995) containing a photodetector connected to a pulse shaper, and an electronic headlight operating mode control unit, the input of which is connected to the pulse shaper output . According to the invention, the electronic unit is made in the form of a second pulse shaper of duration 0, a switching unit for switching headlights and a third pulse shaper of 1 duration with a pause between pulses 2. The output of the pulse shaper is connected to the input of the third pulse shaper and the input of the second pulse shaper. The output of the second pulse shaper is connected to the input of the switching unit, and the output of the third pulse shaper is connected to the electric circuit of the frontal lighting to form additional light pulses.

The work consists in receiving light signals from the headlights of a blinding vehicle on each vehicle, as well as radio signals for synchronizing the headlights, converting them into electrical signals, generating a synchronization signal and control signals for the headlights operating modes, emitting a light stream in the form of light pulses synchronized in time . The synchronization of light pulses in this method is carried out by receiving and analyzing the light pulses themselves oppositely emitted headlights and due to the formation, radiation, reception and processing of radio synchronization signals. Radio signals are used to more accurately synchronize light pulses and synchronously with light pulses change the light transmittance of car windows. Radio signals are emitted through the operation of radio transmitting devices installed on each vehicle. As a result of using such a system at short times in time, light emission on one of the approaching cars, on the other car, the windshield (or rear) glass becomes opaque to the light flux.

The disadvantages of this device are its use directly on both cars moving towards each other, the frequency difference of the radio transmitting devices, the lack of protection against short circuit, the inability to use it on cars with an on-board power supply voltage of 12 or 24 V, as well as the lack of protection from short light pulses (lightning, fireworks or lampposts on the side of the road) and roughnesses of the roadway.

The technical result is aimed at the possibility of using this device on one of the cars moving towards each other and its correct operation, regardless of the device of the oncoming car lighting system, as well as its installation on all types of cars.

The technical result is achieved by the fact that the device for automatically switching the lighting modes of cars, containing a photosensor based on a photoresistor and a control and switching unit for lighting modes, additionally includes: a voltage supply switch and a voltage stabilizer for using the device on cars with on-board power supply voltage of 12 or and 24 V, short circuit protection, dipped beam delay timer, high beam delayed timer, pulse generator, off The selector of the automatic control mode for external lighting and the relay for switching the lighting modes. The control unit is connected directly to the high beam enable switch from the manual switch of the lighting modes, and the control unit outputs to the low and high beam enable relay.

Comparative analysis with the prototype shows that the proposed device is distinguished by the introduction of additional elements into it and the scheme of their connection to the lighting system, namely: the control unit is connected directly to the high beam output from the manual switch of the lighting modes, and the control unit outputs to the low and high beam.

The introduction of these elements allows the car lighting system to more accurately adapt to any road conditions and allows us to conclude that the claimed device meets the criterion: "Significant differences".

The device is illustrated by drawings:

in FIG. 1 is a functional diagram of a device for automatically switching lighting modes, FIG. 2 is a schematic diagram of a device control unit for automatically switching lighting modes.

A device for automatically switching lighting modes (Fig. 1) contains a photosensor (photoresistor) 1, a control unit 2, a voltage supply switch 7, a voltage stabilizer 6, short circuit protection 8, a dipped beam delay timer 3, a high beam delay timer 5 , a pulse generator 4 and a relay for switching lighting modes 9.

The operation of the device consists (Fig. 2) in receiving light pulses from an oncoming car by a photosensor 1, which generates electrical signals in the control unit 2 that specify a specific lighting mode. When driving a car, the lighting system of which is equipped with a device for automatically switching lighting modes, at night time on an unlit territory of the carriageway with the device turned on and in the absence of extraneous external light sources, the system automatically turns on the main beam. The photosensor operates in two modes. In the first mode, when an oncoming car appears with the main beam on it, the luminous flux generated by it falls on the photosensor, the dipped beam delay timer 3 is activated. It is designed to prevent sudden switching of light as a result of road surface irregularities and is set for 1-2 seconds. When the oncoming car continues to move with the main beam on, without switching to the low beam, the light flux increases, the resistance of the photoresistor drops even more, the second mode of operation of the device is triggered, and the car with the automatic lighting switching system starts blinking with the main beam on the oncoming car, warning it that you need to switch from far to near so as not to blind the driver. The high-beam blinking is performed by the pulse generator 4 until the oncoming car switches to the low beam. In the case when the oncoming car switches from the main beam to the dipped beam, and the level of the light threshold has not yet reached the threshold for switching the light from the high beam to the dipped beam, the high beam delay timer 5 is activated, designed for a time of 4-6 seconds. It is designed to prevent the premature inclusion of high beams in the case when the illumination from the oncoming car is not constant and varies within small limits.

A voltage stabilizer 6 and a power mode switch 7 of the device for automatically switching lighting modes are provided in the control unit. This allows you to use this device on cars with an on-board power supply of both 12 and 24 V. There is also protection against short circuit 8, made on diodes. Since the outputs of the control unit are connected directly to the dipped and main beam switch, and on some cars there may be several, the control unit has a relay for switching the lighting modes 9. On cars with one common relay, it must be turned off, and the conclusions that fit it , connect directly to the control unit with an automatic switch of lighting modes. On cars with two relays (dipped beam relay 10 and high beam relay 11), the outputs of the control unit are connected directly to them. On the current path from the manual switch of the lighting modes to the standard high beam switch between the relay itself and the control unit, an automatic mode switch 12 is installed, which is designed to turn the device on and off to automatically switch the vehicle's lighting modes. A photodiode and a phototransistor can also be used as a photosensor.

A device for automatically switching lighting modes does not require large expenses for its production, is distinguished by its versatility and small dimensions. Installing it on a car does not take much time and can be done both independently and at a service station. The control unit of the device can be installed under the dashboard of the car, and the sensor on the left under the windshield.

Claims (1)

A device for automatically switching lighting modes, containing a photosensor based on a photoresistor and a control and switching unit for lighting modes, characterized in that it additionally includes: a voltage supply switch and a voltage stabilizer for using the device on vehicles with an on-board supply voltage of 12 or 24 V, short circuit protection, dipped beam delay timer, high beam delay timer, pulse generator, automatic mode switch ma external lighting and illumination relay switching mode, the control unit is connected directly to the conclusion inclusion beam from the manual lighting mode switch, and outputs to the relay control unit and the dipped beam.

Images