High-Precision Brake Distance and Vehicle Speed Measurement

ADMA-Speed is a high-precision measurement system for vehicle speed, acceleration and braking distance.

By combining GNSS technology with integrated inertial sensors and proven ADMA signal processing, it delivers accurate and stable measurement data for brake testing, vehicle dynamics development and ADAS validation.

Compared with conventional GNSS speed sensors, ADMA-Speed compensates for signal latency, pitch movement and acceleration-related GNSS errors, providing smoother and more reliable results.

Applications

• Brake and stopping-distance testing
• Vehicle speed and acceleration measurement
• Vehicle dynamics testing
• ADAS validation, including ACC, FCW, AEB, LDW and LKA
• Car-to-car and vulnerable road user testing
• Chassis development and adjustment
• Testing according to Euro NCAP and NHTSA requirements

Key Features

• GNSS antenna and inertial sensors integrated into one compact housing
• Fast magnetic mounting on the vehicle roof
• Pitch compensation during braking
• Smooth and stable speed measurement
• Compensation of GNSS data latency
• Correction of acceleration-dependent GNSS signal distortion
• Speed calculation at the vehicle centre of gravity
• Proven Kalman-filter signal processing
• Real-time output of acceleration, speed and braking distance via CAN
• Data output rates up to 1,000 Hz
• CAN and Ethernet interfaces
• Inputs for brake triggers and light barriers
• Speed-triggered and externally triggered braking-distance measurement

Optional Inertial Navigation Functions

ADMA-Speed can be expanded into a full inertial navigation system for vehicle dynamics and ADAS testing.

Available options include:

• Lateral-deviation output
• Complete motion data, including acceleration, velocity, position, angular rates and attitude angles
• Dual-antenna configuration for heading measurement without initialisation
• Position accuracy down to 2 cm
• Data output rates up to 1 kHz
• Real-time relative measurements, such as vehicle distance, via Wi-Fi for multi-vehicle testing