Vehicles present one of the harshest environments for computing equipment — combining temperature extremes, constant vibration, unpredictable power, and space constraints in a single deployment scenario. Whether you're equipping a police cruiser, a delivery fleet, a mining truck, or a transit bus, the computer must be purpose-built for vehicular use.
The Vehicle Environment
Vibration
Vehicles produce continuous vibration from engines, road surfaces, and drivetrain:
- Passenger vehicles: 0.5-2G RMS, 5-500 Hz
- Commercial trucks: 1-5G RMS, with road shock impulses up to 20G
- Off-road/mining: 3-10G RMS continuous, shock up to 50G
- Rail: Per EN 61373 (Category 1 for body-mounted equipment)
Temperature
- Cold soak: Vehicle parked overnight at -30°C to -40°C
- Hot soak: Vehicle parked in summer sun, dashboard/cabin reaching 70-80°C
- Rapid cycling: From cold soak to heated cabin in minutes
Power
Vehicle electrical systems are anything but stable:
- Cranking: Battery voltage drops to 6-8V during engine start (12V system)
- Load dump: Voltage spikes to 60-100V when alternator disconnects
- Noise: Ignition noise, relay switching, motor starting transients
- Multiple voltages: 12V (cars), 24V (trucks/buses), 48V (newer hybrids)
Space
Vehicle installations have limited space, often requiring:
- Mounting under seats, in trunks, or behind panels
- Compact dimensions with all I/O on one or two sides
- Cable routing through vehicle harnesses
Essential Hardware Features
Power Management
- Wide-range DC input: 9-36V DC (covers both 12V and 24V systems)
- Ignition control: Delayed startup and configurable shutdown after ignition off
- Cold crank protection: Continues operating when voltage dips during engine start
- Load dump protection: Survives voltage spikes per ISO 7637-2 or MIL-STD-1275
- Low-power standby: Draws minimal current when vehicle is parked (prevent battery drain)
Ruggedization
- Fanless: No fan to fail from constant vibration
- SSD storage: No spinning hard drive
- Vibration-rated: Tested to MIL-STD-810 Method 514 or equivalent
- Operating temperature: -30°C to 70°C minimum (covering hot soak and cold soak)
- Conformal coating: Protects PCB from moisture and condensation during temperature transitions
Connectivity
- Cellular (4G LTE / 5G): Fleet communication, real-time data upload
- Wi-Fi: Automatic data sync at depot
- GPS/GNSS: Location tracking and geofencing
- Bluetooth: Driver peripherals (headset, scanner)
- CAN bus: Access to vehicle diagnostic data (J1939, OBD-II)
- Multiple USB: Cameras, peripherals, mobile device charging
Certifications
- E-Mark (ECE R10): Required for permanent vehicle installation in EU
- SAE J1455: Recommended environmental practices for vehicle electronics
- MIL-STD-810: Vibration, shock, and temperature testing
- ISO 7637: Vehicle electrical transient immunity
Common Applications
| Application | Key Requirements |
|---|---|
| Fleet management | GPS, cellular, CAN bus, low power standby |
| Public transit | EN 50155, multiple displays, passenger Wi-Fi |
| Law enforcement | Quick boot, multiple cameras, secure storage |
| Emergency vehicles | Reliability, multiple radios, GPS |
| Mining/construction | Extreme vibration, wide temperature, dust protection |
| Delivery/logistics | Barcode scanner, route display, cellular |
Acnodes Corporation manufactures vehicle-rated industrial computers with wide-range DC input, ignition control, and MIL-STD-810 vibration certification. Contact us for fleet computing solutions.