Dual Channel Traffic Detector With High Quality Vehicle Loop Detector
Dual Channel Traffic Detector
Dual channel traffic detector working with barrier and loop detector coil. Dual channel traffic detector also named as the sense of direction, suitable for single-channel both in and out lanes. The dual channel traffic detector is an inductive vehicle detector whose principle is that the metal parts of the vehicle change the inductance of the detection ring. The microcontroller analyzes to determine if the vehicle is present. Used to control doors, fences, parking gates, and card dispensers.
The installation of dual channel traffic detector should be close to the vehicle loop detector coil. And with a waterproof environment. The dual channel traffic detector whether can working well. Much depends on the important parameters of the induction coil to which it is connected. (The material of the coil, the shape of the coil is correct and the construction is safe and correct)Mutual crosstalk of the detection coils When the two coils are close together, the electromagnetic fields of the two coils cross each other. Crosstalk can lead to erroneous detection results. (eg deadlock of the relay). In the same area, when it is relatively close, there will be a lot of crosstalk. In order to reduce crosstalk, the following measures can be taken. Increase the spacing of adjacent coils. It must be ensured that the distance between the coils is more than 2 meters. Good shielding of the dual channel loop detection coil lead wires. The coiled cable and leads are preferably single-core copper conductors. The coils and leads are complete wires. The coil and lead wire number are not less than 1.0 mm. The double waterproof cable is used. The same number of turns of different sizes to change the operating frequency of the coil. Thereby reducing crosstalk. Detect the shape of the coil. If the dual channel traffic detector coil needs to be installed close to a large number of metal areas. When (for example, close to the gate), a figure-eight coil should be used.Set the presence time by DIP3 switch. Dialing the DIP3 to OFF, Holding time 5 minutes (when the stay time of the vehicle is more than 5 minutes, the detector will be reset and come back to the carless condition). When dialing the DIP3 to ON, the present time is unlimited(when the vehicle stays on the loops, holding time unlimited). Set the presence signal by DIP5. Dialing the DIP5 to OFF, once the vehicle entre into the loops, signal be output at once. Dialing DIP5 to ON, the signal would be output after two seconds.
The Main Feature Of Dual Channel Traffic Detector
1.With automatic compensation of ambient temperature
2.Coil with lightning protection
3.Coil fault automatic detection function
4.Multi-level sensitivity adjustable
5. Different frequencies can be selected to avoid mutual interference of coils
6.Relay signal output, a variety of output options
7.Can realize the direction of the vehicle, the vehicle speed measurement function