Vehicle loop detector accurately sense the presence of vehicles on the pavement above

Description:

Noble Loop detectors are used wherever vehicles have to be detected such as monitoring and safe guarding access ways or for counting vehicles. The output signal can be used for controlling door and gate drive mechanisms, operating barriers, controlling traffic light systems in car parks or activating card dispensers in car parks.

NBLD200 has two-way output relays. Two outputs of them are unlimited when the corresponding loop is permanently covered,while the others are multi-mode that can be set by users. The direction detecting Function can be used to statistics the vehicle flux. The principle is based on a change in the inductance within the loop which is caused by the metallic components of passing vehicles. The changes are picked up and evaluated by a microprocessor. Ease of use thanks to automatic calibration when the operating voltage is applied.

Direction Detection:

If vehicle moves from CH1 to CH2, and left CH1, then CH1 relay pulse output; if vehicle moves from CH2 to CH1, and left CH2, then CH2 relay pulse output

Features :

1) Reset Switch : The reset switch enables the detector to be manually reset during  commissioning and testing . This results in the detector re-tuning the sensing loop and becoming ready for vehicle detection ;
2) Selectable Pulse Time : This feature sets the length of time that the pulse relay will be energized for 1 Second or 0.5 Seconds ;
3) Pulse Relay Selection : The Pulse Relay may be configured to energize on detection of a vehicle or when the vehicle leaves the loop ;
4) Sensitivity Boost : This feature sets the undetect level to maximum sensitivity and is used to prevent loss of detection of high-bed vehicles ;
5) Switch Selectable Sensibility : 11 levers adjustable sensitivity setting are available on the switches to allow flexibility in configuration ;
6) Switch Selectable Frequency : 4 frequency settings are available to prevent cross-talk between adjacent loops ;
7) Filter Option : This option is used to provide a delay between detection of the vehicle and  switchiing of the output relay . This relay is normally used to prevent false detection of small or fast moving objects ;
8) Permanent Presence Option : This feature ensure detection of the vehicle will be maintained when the vehicle is parked over the loop for extended periods .

Specifications:

Application:

The LD-200 Enhanced single channel detectors can be used in a variety of applications in the parking and door / gate environments:
1. To arm card readers and ticket dispensers.
2. As a barrier/gate/door closing detector.
3. As a barrier/gate/door opening detector (Free exit).
4. To generate pulses for counting vehicles. 

Competitive Advantage:

Self-turning range: 20-2000μH

Response Times: Turn-on 10-90MS

                Turn-off 10-90MS

Sensitivity:       16 way selectable                                        

                Highest 0.010% DL/L                                     

                Lowest 2.56% DL/L

 FAQ:

Q1: If the detector is not working?

A1: Press reset

Q2: If red led indicator is not fully lit?

A2: Check for power supply

Q3: If green led indicator blinks slowly?

A3: It maybe because the loop is short circuit or the no: of turns is not enough.

Q4: If green led indicator blinks slowly?

A4: It maybe because the loop is open or the no: of turns is too many.

Q5: If no: of turns is not enough?

A5: Lower the frequency (if the frequency is still too high, you must add more turns).

Q6: If no: of turns is too many?

A6: Higher the frequency (if the frequency is still too low, you must remove some turns). 

Inductive loop detector picture: