Radar SmartSensor HD

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The technologies that power each SmartSensor device have been designed, created and manufactured by Wavetronix specifically for traffic detection. Each device is built to the highest standards of quality-rigorously tested and fully supported.

SmartSensor gets traffic detection out of the ground and puts it at the side of the road, where it is easier to install, easier to maintain and safer for workers. Aboveground installation also eliminates the need for lane closures that disrupt traffic.

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SmartSensor HD is the only radar traffic detector that offers true high definition. At 245 MHz, it operates at five times the bandwidth of other sensors, for greater resolution, a more stable signal and even greater accuracy. Wavetronix is the only manufacturer of radar-based traffic detection devices that offers true high definition radar. Like HD TV, HD radar creates a sharper, clearer image, resulting in greater accuracy.To create HD radar, a sensor must operate at a high bandwidth. SmartSensor HD operates in the 245 MHz bandwidth and produces clearer, more sharply focused radar images. Other radar traffic sensors operate at bandwidths of 45 or 49 MHz, and the radar images produced by these devices are typically blurred across lanes, resulting in lane spillover, vehicle occlusion and unresolved detections.Some devices have tried to mimic HD radar by increasing their sampling rate, or pixels per lane, without increasing bandwidth. This has led to moderate improvements in performance but still cannot match the accuracy of Wavetronix' true high definition.

 

GUIEach SmartSensor features a GUI that makes it easy to configure and manage the sensor. The GUI software runs on multiple platforms, including PCs, laptops and handheld devices, for easy in-field work or remote monitoring of conditions. All Wavetronix SmartSensors feature a similar, user-friendly graphic interface for quick and easy sensor configurations. The interface’s intuitive design includes point-and-click operations that can be learned very quickly. Real-time graphic vehicle representations greatly simplify the configuration process, and they allow users to remotely monitor current traffic conditions. The GUI software runs on various Windows platforms, including Windows Mobile so that in-field configurations can be performed using a handheld computer.

 

 

22 linieSmartSensor HD accurately detects up to 22 lanes of traffic.

 

 

 

 

Auto-configuration

Proper installation and configuration are essential for accurate performance from radar sensors, and SmartSensor installs and configures more quickly and more precisely than competitive devices. SmartSensor is well known for its auto-configuration capability. This industry-leading, patented process automatically determines lane positions by observing traffic flow, making SmartSensor the quickest and easiest sensor to set up. It also ensures the setup will be consistent from location to location, even with different installers.

Vehicle-based Detection

SmartSensor HD’s detections are based on vehicles, not on lanes, so detections are consistently accurate, even if a vehicle changes lanes. Accurate Vehicle detection means that each individual vehicle is detected and its speed, duration, length and lane assignment is precisely measured.

SmartSensor HD detects vehicles and then assigns them to the lane closest to them. As a result, even lane changing vehicles are accurately detected. This is called vehicle-based detection, and it's possible because of SmartSensor HD's high resolution radar. In contrast, zone based detectors like loops or low resolution radar are lane-based detectors and will detect anything that passes through the lane. In this case, it is likely that the lane changer will be counted twice, once in each lane.



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Multiple Radar

With true high definition radar, Wavetronix has been able to develop a radical concept-multiple radars contained in one device. SmartSensor HD consists of multiple radars; two receive antennas positioned side-by-side with enough space between to create two separate, high definition beams.

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Multiple Beams

The two beams generated by SmartSensor HD transmit parallel to each other, creating a speed trap similar to a dual loop system. This speed trap allows SmartSensor HD to offer something competitive radar traffic detectors can’t-accurate per vehicle speeds. Algorithms measure the time it takes a vehicle to move from one beam to the next. This results in highly accurate speed measurements and more precise vehicle classifications.

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Non-intrusive Installation

SmartSensors install above the ground without affecting traffic flow. Since the sensors install at roadside, they do not require lane closures common with in-road detectors, and this, in turn, reduces the risk of injury or death to the workers installing the sensors. Additionally, SmartSensor is easier to maintain than in-road detectors, and can quickly be replaced or reconfigured to accommodate roadway changes.

In-road Detectors

In-road detectors require saw-cuts or core-drilled holes that can weaken the road surface. Lanes must be closed, so traffic flow is disrupted and workers are placed in greater danger. And if an in-road device fails, or if the roadway changes, the devices must be dug up, making them very difficult to maintain.

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Industry Leading All Weather, All Light Performance

Regardless of weather or lighting conditions, SmartSensor products continue to detect vehicles in their field of view. That’s because the length of radar’s electromagnetic wave is much larger than the wavelength of light, so radar can propagate through rain, snow, fog and even dust storms without becoming distorted.

Light. Radar-based sensors are active, meaning they transmit as well as receive a signal. Since SmartSensors transmit their own signal, they are not dependent on external sources in the same way that video is dependent on light. In other words, video detections are affected by too much light in the form of glare; too little sunlight; or inadequate street lighting; but these conditions will not affect radar.

Fog. In heavy fog, SmartSensor HD’s 24 GHz radar signal retains 99 percent of its original transmission strength over 100 feet. Light, on the other hand, can be attenuated in heavy fog so that it loses 41 percent of its power every ten feet. At that rate, light has diminished to less than one percent of its original transmission in less than 100 feet!

Wind. Since SmartSensor measurements are primarily range-based, the change in range to targets during windy conditions is nominal. During a wind storm, the distance between the radar sensor and the traffic on the roadway typically changes by 2 or 3 feet at the most. This amount of range change is typically not enough to cause vehicles to be falsely detected in adjacent lanes or zones. Slight changes in angle-based detectors during windy conditions can cause objects to show up in very different locations.

It is true that wet surfaces reflect radar signals differently than dry surfaces, but radar algorithms are designed to compensate for this change in background.

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 Radar Smart Sensor HD-EN.pdf

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