TDC4 Traffic detectors
Non-intrusive traffic detectors for single lane traffic data acquisition with video verification capability
The TDC4 Series are advanced traffic detectors using Video, Doppler Radar, Ultrasound and Passive Infrared technology. Comprehensive traffic data including individual vehicle class, speed, length, occupancy time and time gap are provided via RS 485.
TYPICAL APPLICATIONS
TDC4 Series detectors are specifically designed for a variety of Traffic Data Collection and traffic control applications where inductive loops have been used in the past:
- Vehicle classification
- Individual vehicle speed
- Vehicle counting (volume)
- True presence, queue and wrong-way driver detection
- Occupancy and headway / time gap measurement
- Visual verification of irregular traffic situations; triggered by traffic situations or remotely through traffic management system
WORKING PRINCIPLE
TDC4 traffic detectors combine video verification capabilities with the superior detection and measurement performance of the TDC3 series. They measure the speed of each vehicle using the Doppler shift of the reflected microwave frequency. The ultrasonic sensor system scans the height profile of the passing vehicle and the PIR zones obtain the vehicle position (except TDC4-2) within the observed lane. The detector can be configured to automatically capture images upon certain traffic conditions (wrong-way driver, queue) or upon external command via RS 485. The captured image can be retrieved by RS 485 bus, eliminating the need for costly infrastructure upgrades.
MOUNTING
Recommended mounting points are gantries or other overhead structures above the lane centre. Clearly superior performance and reliability are a result of:
- Four independent detection technologies
- Full temperature compensation across entire temperature range
- Redundant system functionality
- Build-in colour camera: Resolution up to 640 x 480 (VGA)
- Multi technology detection: Three independent physical detection principles
- Standardized vehicle classification: German TLS for 2, 5+1 and 8+1 classes
- Auto calibration: Auto calibration within the recommended height above the lane with dedicated software
- Detection of lane-changing vehicles and vehicles travelling between adjacent lanes (except TDC4-2)
- Detection of standing vehicles
- Detection of wrong-way drivers
- Wide operating temperature range: –40 to +70°C
- Optimal performance: in all weather and climate conditions
- Remote configuration and setup
- With dedicated installation program
| Supply Voltage |
10.5 … 30 V DC |
| Power Consumption |
max 190 mA |
| Output (Data Transfer) |
RS 485 (other options on request) |
| Turn-on Time |
typ. 20 s from power on |
| Dimensions |
see drawing (pictures tab) |
| Case Material |
Polycarbonate, dark grey |
| Mounting Points |
M8, stainless steel V4A |
| Weight |
app. 1700 g (3.75 lbs) without bracket |
| Video |
Colour (VGA); max. 640 x 480 |
| Doppler Radar |
K-Band 24.05 … 24.25 GHz |
| Ultrasonic Frequency |
40 kHz |
| Ultrasonic Pulse Rate |
10 … 30 pulses per second |
| PIR Sensors |
2 channel PIR (TDC3-2) |
| PIR Spectral Response |
6.5 … 14 μm |
| Counting accuracy |
typ. ± 3% |
| Speed accuracy |
typ. ± 3% (> 100 km/h) |
| Classification accuracy |
Vehicle classes according TLS |
| Operating Temperature |
–40°C to +70°C |
| Humidity |
95 % RH max. |
| Sealing |
IP 64 splash proof |
