Road Surface Condition Detector (HMRD05000)

Hummingbird Electronics manufactures a range of road type or condition detectors. The detectors measure the the vibration experienced by a vehicle as a result of different road surfaces and road conditions and trigger an output when the road surface deteriorates to a preset level. An continuously updated qualatitive road surface condition output is also provided.

Road surface detectors measure vibration using highly sensitive accelerometers. Vibration is measured in three dimensions (left/right, forward/back and up/down), so that the sensor can be mounted in any physical orientation to the vehicle and work equally well. An overall vibration as experienced by the vehicle is calculated and used to determine the condition of the road surface every 4 seconds. Complex signal processing techniques remove accelerations due to speed increases, braking and cornering.

A screw adjustable setpoint allows for a threshold to be set between 0 and 0.5G. When average vibration as measured over a 4 second period exceeds the setpoint, an output is triggered. Typically the output would be used to drive a sounder or would be an input to a vehicle management system.

A red power-on LED and a green trigger-on LED are provided to assist in installation.

Road condition detectors are supplied in a rugged ABS plastic enclosure. All sensitive electronics are coated with a silicon compound to prevent water damage.

Provision for screw mounting when required is provided.

Power to the unit and pulse outputs are provided through four colour coded wires.

• Input voltage: 6V to 36V
• Power consumption: 80mW (7mA at 12V)
• Trigger output: Trigger-on: Vin-1; Trigger off: less than 20mV; maximum current: 25mA
• G-level voltage setting: Minimum, 0V; maximum 5V (0-100% duty cycle 244Hz 5V amplitude)

Typical road measurements

• 50mm (L), 67mm (W), 21mm (H)

• Operating temperature: -40°C to +85°C
• Storage temperature: -55°C to +105°C
• Humidity: 5% to 95% R.H. non condensing at 60°C

Power and pulse output:

• Red: input voltage (6V to 35V)
• Black: ground (0V)
• Green: DC setpoint / current condition
• Blue: trigger output

Road Surface Detector.pdf
Warranty

DISCLAIMER

Hummingbird Electronics Pty Ltd has designed the product for use in a broad range of applications. It is however solely the customer's responsibility to evaluate the device and determine it's suitability in their end application.

Hummingbird Electronics Pty Ltd does not suggest or make any recommendation as to the suitability of parameters that determine angle, height, impact, speed, force, accident, harsh braking, roll-over or rate-of-turn events, input or output voltage or current. Parameter values stated or implied in this document are for explanation only and should not be taken as typical or representative of a real world situation.

---

USE OF PRODUCTS

Products are not authorised for use in critical safety or other applications where a failure may reasonably be expected to result in personal injury, loss of life, or catastrophic property damage. If a customer uses or sells the products for use in any such applications, the customer acknowledges that such use or sale is at customer's sole risk. The customer will indemnify, defend or hold Hummingbird Electronics and their electronic component suppliers/assemblers harmless from and against any and all liabilities and costs arising out of or in connection with use of product or sale.