RU134345U1 - DEVICE FOR PHOTOGRAPHING A VEHICLE EXITING THE PROHIBITED SIGNAL OF THE LIGHT - Google Patents

Abstract

A device for photographing a vehicle that has arrived at a traffic light prohibiting signal that detects a violation coinciding in time with the action of the traffic light prohibiting signal using a camera, characterized in that the device contains two infrared radiation transmitters mounted on a traffic light rack directed to two photocells installed at a traffic light counter located on the opposite side of the road, connected to a microcontroller that controls the camera through a closing relay.

Description

The utility model relates to means for detecting violations of the rules of the road and is intended for photographing vehicles when they leave for an adjustable section of the road under a prohibiting traffic signal.

A known method of controlling traffic at an intersection, including fixing at a time coincident with the action of the inhibit signal, violation by the vehicle of the intersection with its subsequent identification (see patent RU 2419163, class G08G 1/01, publ. 05.20.2011). In the description of the invention, the structural elements of the device are indicated: the violation can be recorded automatically, for example, using a camera, determining the number of the intruder’s vehicle, as well as by recording sensor signals and traffic lights to the information carrier. The disadvantages of the known invention is that when detecting violations of the intersection using sensors in their coverage area at different widths of the carriageway, vehicles that do not violate traffic rules will fall: vehicles that end traffic through the intersection under a traffic light prohibition signal and vehicles that perform turn from directions crossing the road.

The objective of the utility model is to eliminate these drawbacks. The technical result consists in the use of a double barrier of infrared radiation used to turn on the camera when the rays intersect in a given sequence, as well as an electronic microcontroller that determines the time the camera is turned on and turns it on.

The problem is solved, and the technical result is achieved by the fact that the vehicle is fixed and identified by the traffic light that stops at the inhibitory signal by the camera installed at the traffic light when the vehicle intersects two infrared rays coming from the transmitters installed on the rack of one of the traffic lights aimed at the photocells installed at a traffic light located on the opposite side of the road, enabling the camera to turn on when the rays cross in the rear constant sequence. The camera’s turn-on time corresponds to the moment the vehicle enters the camera’s lens and is determined by the vehicle’s speed, acceleration (acceleration, braking) and the distance to the point the camera is pointed at. The calculation of the time the vehicle enters the focus of the camera is performed by a programmable microcontroller, the peripheral devices of which include a timer and a comparator. The microcontroller determines the speed of the vehicle by the time of intersection of the first and second infrared rays and the distance between the photocells. Acceleration (deceleration) corresponding to acceleration or deceleration of a vehicle is defined as the quotient of the division of the difference in speeds calculated at the time of the intersection of the rays and when leaving the contact zone with them by the time the infrared barrier passes. Infrared radiation transmitters and photocells are installed between each other at a distance that excludes mutual exposure of the rays to the photocells. The distance between the transmitters is determined by the formula:

,

,

where χ is the distance between the transmitters;

l is the distance between the photocell and the transmitter;

β is the beam scattering angle.

The distance between the transmitters is equal to the distance between the photocells.

The drawing (figure 1) shows the location of the structural elements of the device at traffic lights, the diagram (figure 2) shows a functional diagram of the device.

A device for photographing a vehicle that has turned on a traffic light that has a prohibiting signal has infrared transmitters 5 and 6 mounted on a rack 4 of a traffic light 2, photocells 7 and 8 mounted on a rack 3 of a traffic light 1 and a camera 9 mounted on a rack 3, photocells 7 and 8 are connected by electrical a circuit with a microcontroller 10, which is connected via a closing relay 11 to the camera 9, all the elements are powered by the input voltage supplied to the red light 12 of the traffic light.

The device operates as follows.

When the vehicle crosses the infrared ray emanating from the transmitter 6, with the red light 12 of the traffic light on, the microcontroller 10 receives a signal from the photocell 8, the microcontroller determines the speed and acceleration of the vehicle by the time the second infrared ray crosses from the transmitter 5, directed to photocell 7 as well as the turn-on time of the camera 9 and turns on the camera by closing the relay 11. Vehicles completing movement through an intersection with a prohibiting traffic signal The vehicles and the vehicles that make the turn from the directions crossing the road cross the infrared ray coming from the transmitter 5, while the microcontroller does not close the contacts of the relay 11 to the signal coming from the photocell 7, photographing the vehicle does not occur.

Claims (1)

A device for photographing a vehicle that has arrived at a traffic light prohibitory signal, which detects a violation coinciding in time with the action of the traffic light prohibitory signal, using a camera, characterized in that the device contains two infrared radiation transmitters mounted on a traffic light rack directed to two photocells installed at a traffic light counter located on the opposite side of the road, connected to a microcontroller that controls the camera through a closing relay.

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