THE MONITOR
August 2015

News from Eberle Design Inc. & Reno A&E

Contents








AVIEMRSystemAutomatic Vehicle Identification (AVI) & Emergency Vehicle Ingress System - Saving Lives

 

 

At a fire station in a major US city, a paramedic rescue unit is dispatched to an emergency call involving a man having a heart attack -- in cardiac arrest. As the paramedics approach the victim's address, they see it is inside a gated community. Without a Gate Preemption System, the crew hurriedly searches for the correct fire department access key. After 45 seconds, they locate the correct key and enter the gated community.

 

The additional time it took to obtain the correct access key, could have made the difference in saving the patient's life. But, in Clark County, Nevada, gated communities are required to have an emergency gate ingress system. Reno A&E AVI-911 transmitters are mounted under every emergency vehicle, (Fire, Police and EMS), allowing all gates to open automatically. The AVI transmitter sends a special code through inductive loops connected to a RAE AVI detector that verifies valid / pre-authorized vehicles, and sends a signal to open the gate.

 

Lives depend upon a rapid response from emergency services, and they demand the best in AVI technology and reliability. The RAE AVI-911 system has been deployed for more than 20 years, with more than 50,000 units in operation worldwide. For more information about our system, contact Carl Zabel at Reno A&E via email at carlz@renoae.com or +1.775.870.4499.



Tom Sutula

By Tom Sutula
Technical and Applications Sales, Reno A&E

What is inductance?

When a current is applied to a conductor, a magnetic field is formed around the wire. If the current source is removed, the magnetic field collapses into the wire trying to maintain the current flow. This resistance to the change of current flow is defined as inductance. 

 

What is an inductive loop?

When wound in the form of a coil, the magnetic field becomes concentrated because of the mutual inductance. Applications of coils are transformers, solenoids, relays and inductive loops for loop detection. The field component of an inductive loop system consists of one or more turns of insulated loop wire wound in a shallow slot, typically sawed into the pavement, and a lead-in cable from the curbside to the enclosure, which houses the inductive loop detector module. 

 

How do inductive loops detect vehicles?

 

 

  

An inductive loop is basically a pickup coil, similar to a transformer.  When a coil is loaded, change occurs. To cause a load on a transformer coil, a short could be applied to the secondary coil and a change is seen on the primary coil. An inductive loop works the same way. When the loop is loaded there is a change seen at the loop detector. Typically, this loading is done with a vehicle passing over or stopping atop the loop.

 

Simply, the loop detector drives energy through the inductive loop causing a field to form around the loop. The loop automatically tunes to a resonant frequency forming a parallel tuned resonate circuit. When a vehicle enters the loop, the loop field is induced into the metal and the inductance decreases. The inductance decrease causes the resonate frequency to increase, which the loop detector monitors to determine if a vehicle has entered the loop. The resonate frequency is defined as:
 
Where: f = frequency (Hertz)

L = inductance (Henries)

C = capacitance (Farads)

 

Since 2π is a constant and never changes, the resonate frequency will only change if L or C varies. If L or C decreases, f will increase. When the frequency change becomes greater than the threshold set by the sensitivity level the loop detector will output to indicate a vehicle is present. The formula indicates a good loop design maximizes the change in L and minimizes the change in C (XLPE insulation and preformed loops).


AugustwebinarAugust 11th Webinar: Reno A&E's Data Aggregator™ (DA-100B™) - Obtaining Real-time Traffic Data from Remote Intersections

 

Please join us on August 11th for an informative 45-minute webinar on the iCITE™ Data Aggregator™ (DA-100B™) Series field monitoring device - the first system capable of accessing real-time intersection and cabinet data from any traffic cabinet via a high-speed communications connection, regardless of the traffic controller or central ITS system. The iCITE™ DA-100B™ delivers real-time traffic data through an encrypted wireless or Ethernet Cloud-based IP connection. The data set can be customized for anyone wishing to provide performance measurement data to traffic engineers, traffic planners, consulting firms, traffic management agencies and commercial traffic data providers.

 

Presented by Matt Zinn, RAE (Reno A&E) Applications Sales and Technical Services Manager, the webinar will demonstrate live, how traffic signal technicians and engineers can access real-time arterial traffic and intersection information such as vehicle counts by phase, phase status changes, cabinet alarms, and overall health of the traffic cabinet status from remote, non-interconnected intersections.

 

To register for this webinar, click here.



TrafficcabinetmonitoringtechnologyTraffic Cabinet Monitoring Technology Improves with Age

 

Eberle Design Inc. is playing an important role in the development of low-voltage (Direct Current) and low-power (<50 volts AC) Advanced Traffic Controller Cabinets (ATCC). The ATCC is an open architecture traffic control cabinet based on the ITE/NEMA/ AASHTO ITS Cabinet version 1 standard. It is intended to update the ITS Cabinet standard v1 to version 2. It offers significant improvements to conventional cabinets in modularity and compact size, motorist safety, technician safety and diagnostics. The ATCC is intended to update or replace all cabinet types including NEMA TS-1, NEMA TS-2, ITS Cabinet v1, and Caltrans 33X.

 

The ATCC series offers the following benefits:

  • Fail-safer design provides an additional level of safety for motorists and traffic signal technicians.
  • Compact HD components provide increased capabilities in half of the space.
  • Designed for LEDs and ready to migrate to low-voltage 48 VDC operations.

In partnership with multiple OEM controller and cabinet manufacturers, EDI is designing and producing the plug-in components for the ATC traffic cabinet. Contact your local traffic control cabinet provider for more details and visit http://www.editraffic.com/atcc.

 

 

 

International Municipal Signal Association (IMSA) 120th Annual Conference

August 22-25, 2015

New Orleans, LA

  • Exhibiting: Booth #600-602
  • Speaking: Matt Zinn, Applications Sales and Technical Services Manager, August 23rd at 8:00 a.m., "Remote Communications and Monitoring of Non-Connected Intersections"
  • Speaking: Scott Evans, Chief Technology Officer, August 23rd at 2:00 p.m., "Advanced Traffic Controller Cabinet (ATCC) Overview and Panel Discussion"
September 10-12, 2015
Reno, NV - Peppermill Reno Resort
  • Exhibiting: Booth #219 -- Carl Zabel, RAE Director of Sales
October 5-9, 2015
Bordeaux, France - Convention Centre Bordeaux
  • Attending: Bill Russell, President & CEO, and Dr. Bill Sowell, VP-Business Development

October 17-22, 2015

Riyadh, Saudia Arabia - Riyadh Palace Hotel

 

December 15-17, 2015

Riyadh, Saudia Arabia - International Hotel Riyadh

 


WebinarsWebinars
    

August 11, 2015 | 8:00-8:45 a.m PDT/11:00-11:45 a.m. EDT

 

Best Practices for Inductive Loop Operation - Technology Improves with Age

September 8, 2015 | 8:00-8:45 a.m PDT/11:00-11:45 a.m. EDT

 

MMU Testing and Factory Recertification Program Overview

October 13, 2015 | 8:00-8:45 a.m PDT/11:00-11:45 a.m. EDT



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We value the confidence and trust of our customers and industry partners. We appreciate any feedback you wish to provide to enhance our product suite, service, technical support or training. 
Please direct any comments to Debbie Zinn at dzinn@editraffic.com or +1.602.396.1277.