Continental ARS 404-21 Entry: Long Range Radar Sensor 77 GHz
Industrial Sensors
Safe - reliable - robust – very small design
The A.D.C. GmbH offers a new type of radar sensor, the ARS 404-21, as a possible adaption in different applications and as an entry version of the series 40X.
Typical Areas of Application:
- Anti-collision protection for vehicles of every description (particul. autonomous)
- Headway control also for far range (vehicles of every description, particularly autonomous)
- Area monitoring system for far range, e.g. of hazardous or non-accessible areas
- Classification of objects
- Object detection, e.g. in confusing or unclear areas
- Unremarkable object detection by affix a protection cover before it (radome)
Measuring Procedure:
The rugged ARS 404-21 sensor from Continental measures independent the distance and velocity (Doppler's principle) to objects without reflector in one measuring cycle due basis of FMCW (Frequency Modulated Continuous Wave) with very fast ramps, with a real time scanning of 20 / sec. A special feature of the device is the simultaneously measurement of great distances up to 170 m, relative velocity and the angle relation between 2 objects.
Advantages:
- Fast and safe: The ARS 404-21 dispels with the apparent contradiction between excellent great measuring performance and a high degree of operational safety. The rugged ARS 404-21 radar sensor is capable of determining the distance to an object in real time scanning and dependent on the driving speed a possible risk of collision.
- Reliable: The ARS 404-21 radar sensor is fail-safe and able to recognize troubles of the sensor and sensor environment and display it automatically.
- Robust and very small design: By using a radar technology with less complex measuring principle and the development and mass production in automotive supply industry, the design is kept very robust and very small.
Diagram: Field of View (FoV)
The sensor's field of view is represented by two cones. A blue cone indicates the short-range FoV, extending up to approximately 30 meters with a wide angle of ±45°. A red cone indicates the far-range FoV, extending up to approximately 170 meters with a narrower angle of ±9°. The diagram includes distance markers from 0m to 200m and signal strength indicators.
Measuring Performance
| Parameter | Specification | To Natural Targets (Non-Reflector Targets) |
|---|---|---|
| Distance range | point targets, no tracking | 0.20...170m@0...±4° & 0.20...120m@±9° far range scan, 0.20...70m@0...+9° & 0.20...40m@±45° near range scan |
| Resolution distance measuring | point targets, no tracking | 0.40 m (0.75 m @ large v_ego for 170 m range) |
| Accuracy distance measuring | (field of view FoV) | ability to separate targets and objects 1.5...2 x resolution |
| Azimuth angle augmentation | (field of view FoV) | ±0.10 m (0.20 m @ large v_ego for 170 m range) |
| Elevation angle augmentation | 6 dB values 1.4 x larger | -9.0°...+9.0° far range, -45°...+45° near range |
| Azimuth beam width (3 dB) | 6 dB two way | 18° at 6 dB two way for far and near range |
| Elevation beam width | point targets, no tracking | 4.6° @0° far range, 9.2°@0°...13.0°@±45° near range |
| Resolution azimuth angle | point targets, no tracking | 18° at 6 dB two way for far and near range |
| Accuracy azimuth angle | point targets, no tracking | 3.3° far range, 6.6° @0°...9.3°@±45° near range |
| Velocity range | target separation ability | ability to separate targets and objects 1.5...2 x resolution |
| Velocity resolution | point targets | 0.1°@±6°...0.2°@±9° far range |
| Velocity accuracy | 0.6°@0°...2.0°@±45° near range | |
| Sensitivity (min. RCS@x m) | -400 km/h...+200 km/h (- leaving objects...+approximation) | |
| Cycle time | 0.28 km/h | |
| Antenna channels / -principle | planar | ±0.1 km/h |
| 10m²@170 m far range | ||
| 1m²@40 m & 0°...±45° near range | ||
| app. 50 ms near and far measurement | ||
| 6 channels = 2TX/2RX near + 2TX/1RX*+2RX far - *1RX double column = higher bundling / Digital Beam Forming |
Operating Conditions
| Parameter | Specification |
|---|---|
| Radar operating frequency band | 76...77 GHz |
| Transmission capacity | average / peak EIRP |
| Mains power supply | +8,0 V...32 V DC – B-Version for truck & passenger cars |
| Power consumption | 4.5 W / 375 mA typ. and 12 W / 1.0 A peak – sleep <100 μA |
| Load dump protection internal | 200 mA typ. – sleep <200 μA |
| Operating-/ storage temperature | disconnection >60 V and re-start returning to <60 V |
| Life time | -40°C...+85°C / -40°C...+90°C |
| Shock | 10000 h or 10 years (for passenger cars) |
| Vibration | 500 m/s² @6 ms half-sine (10 x shock each in +/-X/Y/Z dir.) |
| Protection rating | 20 [(m/s²)²/Hz]@10 Hz / 0,14 [(m/s²)²/Hz]@1000Hz (peak) |
| IP 6k 9k (dust, high-pressure cleaning) | |
| IP 6k7 (10 cm under water), ice-water shock test, salt fog resistant, mixed gas EN 60068-2-60 |
Connections
- Monitoring function: self monitoring (fail-safe designed)
- Interface: 1 x CAN - high-speed 500 kbit/s
Housing
- Dimensions / weight: 136.25 * 68.4 * 33.75 / app. 172 g - B-type screw mounted
- Material: housing front / rear side: PBT GF 30 black (BASF-Ultradur B4300G6 LS sw 15073) / AC-47100 (AlSi12Cu1(FE)) die cast aluminium or EN AW 5754 (3.535) AlMg3 pressed-formed aluminium
Miscellaneous
- Measuring principle: (Doppler's principle) in one measuring cycle due basis of FMCW with very fast ramps
- Version ARS 404-21: The version -21 allows to set maximum 8 ID's and maximum 8 collision avoidance regions and to change the sensitivity between low and high sensitivity by the user continuously
- Sensor Type: sensor for the industry
Interfaces
The device is fitted with one CAN bus interface. Further interfaces as converter, software adaption are possible on demand and in case of assumption of costs.
Contact Information
A.D.C. GmbH
Industrial Sensors
Peter-Dornier-Str. 10
D-88131 Lindau
Tel.: +49 8382 9699-114
Fax: +49 8382 969922-114
Email: Roland.Liebske-Ext@continental-corporation.com
Website: www.continental-automotive.com/industrial-sensors
