The 3D Profiling system can provide an high resolution 3d file of the vehicles and measure their height, width, length and volume.
The system is composed by 3 LSR-2001 laser scanners: two lasers are installed in the left and right side of a gantry; the third laser is installed in a side pole (or in a second gantry).
The first two lasers scanners continuously scan both sides and the top of the vehicle while the third one checks the position and movement of the vehicle. The result is a very precise measurement of the vehicle with accurate:
- Class (Motorcycle, car, Van, truck, truck with trailer, articulated lorry, bus, etc.)
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BUSES AND COACHES DETECTOR
It is eventually available a unique traffic detector that can distinguish the transit of buses and coaches with high reliability. The above ground sensors that detect the length and the height profile of the vehicle have a strong inaccuracy in the distinction of buses and trucks of equivalent length . The laser scanner detector ( http://lnx.hpdsensors.com/?page_id=889 ) , installed at road side , is able to distinguish vehicles for the transportation of people with high accuracy. This is due to the highly advanced algorithms that were specially designed for applications where it is important to recognize the people transport vehicles .
The most common application is the one that involves the installation of sensors at tunnel entrances so you know how many buses transit inside the tunnel .
Another important application is to detect incoming touristic buses in the city.
The sensor must be installed on the street side at a height of about 4 meters and , in addition to detecting buses and coaches , it is also able to classify cars, vans and heavy vehicles.
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OVER HEIGHT VEHICLES DETECTION
It often happens that vehicles with high height ( trucks, tractors ) damage overhead infrastructures by bumping on them. This event creates damages to the infrastructure , to the vehicle and also to traffic. HPDSENSORS has developed the system RAM 20 which, placed before the critical points , detects any vehicles that exceed the maximum permitted height and activate an alarm. The driver can be warned through the activation of flashing lights on a sign , or by an inscription on a variable message board or even through a traffic light.
RAM 20 is based on a laser scanner sensor which monitors the height of the vehicles on the road up to a maximum of 5 lanes . The system is also able to inform about what is the lane of the overheight vehicle.
Installation can be performed easily on a side pole as high as the height of the threshold and can be powered by mains or solar power.
The system is able to detect even small objects that exceed the height of the vehicle (down to a minimum of 5 cm ) . For example, if a truck with crane has not completely lowered the crane, the system is able to detect it.
Particular attention was paid to the elimination of false alarms due to weather conditions or the passage of birds.
The system is very useful when it is important to preserve overhead structures such as bridges, viaducts, underpasses or tunnels .
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LASER SCANNER FOR TRAFFIC MONITORING, CAMERA TRIGGER AND AXLES COUNTING
The laser scanner technology is one of the best performing in the field of traffic monitoring as it is fast, accurate and flexible. The laser scanner will continuously scans 4 planes with an opening of 96 ° scan. Whereas the detection distance is 20 m. the area monitored by the scanner is very large and allows for example to control a two-lane road. Thanks to the high accuracy of measurement, the traffic detector can be used for:
- speed detection
- detect the profile of the vehicle (height, length, width, etc..) carrying out a precise classification
- detect the axles of vehicles
- queue/line detection
- provide the trigger for cameras (in eg ANPR)
- Detect vehicles at intersections with traffic lights (instead of the electromagnetic loops with lower installation costs)
Depending on the application, the sensor can be installed above or to the side of the road. Designed specifically for road applications, the sensor is equipped with an IP65 enclosure and is equipped with filtering software that allows it to correctly detect even with rain or snow.
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PARKING GUIDANCE SYSTEM ON STREETS
The parking guidance system gives information on the number of free parking places in the streets or in parking areas. The information can be displayed on a variable message sign and can be sent to a control room for a “real time” monitoring of the parking places availability. The system can also be used to check how many users are not paying the parking fee by comparing the data collected by the this system and the data of the parking meters software.
The parking guidance system is an important parking management tool which gives statistical information on the availability of parking places on each hour of the day and during the year.
The system is based on the most advanced technologies both for the vehicle detection and for the data transmission (wireless) making it possible to install it without major civil works.
PLATE RECOGNITION (ANPR)
Hpdsensors is implementing several projects in which the sensors are combined with traffic cameras for the detection of plates. The detection systems of the plates are composed of a camera (generally infrared in order to operate even at night) and a unit of image analysis that can be incorporated in the camera or constituted by a software on a separate computer.
The combination with traffic sensors is useful when you want to detect the license plate of a specific type of vehicle and not of all. Some applications recently made are:
- Detection of tourist buses in towns where these are required to pay a ticket;
- ADR Detection (dangerous goods) through recognition of the Kemler code.
The sensors are also particularly useful in combination with ANPR cameras as they provide a “trigger” to the passage of the vehicle making much more accurate the detection of the plate. Without sensors, the system ANPR must operate in “free run”, which requires the analysis of each single frame in order to detect, in the first instance, the presence of a vehicle and then his plate.