Tianjin Xinlong Airport Technical Co.,Ltd as the manufacturer of surface friction tester in China, made the BHM02 Trailer Frictional Coefficient Measurement Vehicle which has been successfully applied in 100+ airports domestic and overseas(including Capital Airport,Zhengzhou Airport，Wuhan Airport，Chongqing Airport,etc).
BHM02 pull-type surface friction tester colligated many advanced technology of mechanics-electronics-hydraulics，the features as shown below：
- Excellent SafetyThe trailer chassis of BHM02 is from Germany AL-KO Company, which have the inertia braking system.
- Easy Selection of Towing VehicleThe BHM02 surface friction tester use trailer chassis,the water tank integrated in the back trailer body. The measuring system installed on the trailer, the trailer chassis can separate from the towing vehicle easily in the downtime. The control box composed by upper computer and printer put on the towing vehicle.To control the measuring system,do not need to change any structure of the towing vehicle, only need a cable and a towing hook(fix screwed model).This refit have no effect on the towing vehicle’s performance.
- Hydraulic SystemThe vertical positive pressure supplied by hydraulic cylinder with an accumulator,the pump shut down when measuring. Use the accumulator to hold the pressure and absorb vibration to reduce the measuring error.The cylinder use two way connected design has redoubled increased the dynamic measuring accuracy.
- Reliability & AdvancedWe have gathered many years design experience about surface friction tester,did lots of data analysis and got many rationalization proposal from costumers. We have the Chinese interface and use the industrial grade laptop for control center, which much better than the foreign familiar products and can handle very hard work situation. All the parts and materials have the best accuracy and quality, and need to pass the stringent inspection and test.These investment ensured our surface friction tester has the highest measuring accuracy and operational reliability.
- Chinese Menu
Computerized touching keyboard, visual Chinese menu by adopting the tone mocked operating technique, optimize operating procedure, the real Chinese face-to-face interface operation is reached, which optimized the operating procedures, alleviated the operation difficulty and also reduced the possibility of mis-operation. - Self-installed Water Tank and SprinklerThe water tank integrated in the trailer body,and trailer assembled a sprinkler,the usage is very convenient and economical.The water nozzle is arc-shaped and the radius fit to the meter wheel,so can spray water to the accurate position.Besides,the installed water pressure automatic checkout system can prompt the operator on water flow control.
- Accurate Data Results The measuring use the electron demarcated device to increase the measurement accuracy of surface friction tester.Use weighing sensor to demarcate the gravity vertical and use tension sensor to demarcate the horizontal pull.The electron demarcated device use computer to sampling，analyze，display and control.The measurement accuracy fully meets the requirements of ICAO.On the basis of fluid dynamics and pressure transfer features，the cylinder use two way connected design to get equal pressure on both sides of cylinder.So the hydraulic pipe can hold a constant pressure to ground to eliminated the measurement error caused by pavement irregularity.
- Computer ControlBHM02 adopts the modern advanced techniques of data processing and computer controlling, promotes the stability and precision of automatic testing proofreading about the investigated parameter and the final testing numerical value.We use the industrial high level configuration computer to get wider temperature range, better anti-interference and anti-jolt performance than civilian computer.
Use the American NI data capture card as independent data acquisition system to ensure data capture no less than 3 point per meter.The operator can view the curve and log of random meters，convenient for exact analysis. - Electron Demarcated DeviceThe electron demarcated device use computer to sampling，analyze，display and control，actualized automatic demarcation. The measurement accuracy can fully meets the requirements of ICAO.
Operating by the electron demarcated device is very easy,the demarcate process will be a one-time job only need keyboard operation. Briefed the demarcate process and eliminated the measuring error caused by operator.
The special demarcated device with the precision of 5/1000. It is more better than the abroad current use of demarcated device by adopting spring balance when its precision and convenience of operation are all considered. - Advanced & Real-time ControlsThe system use advanced industrial computer as the upper computer to realize better data collection and control function in high speed working condition. Use PLC with powerful control function as lower computer，communicate with upper computer by
standard industrial communication protocol.Realized measuring system overall control,fast data processing and output print,use the Lab VIEW development system from NI company which have friendly man-machine interface and easy to update. And the touch screen technology made the control and operation very easy.
