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Amond Quartz Sensor for Weigh-In-Motion
TheAmond sensor is a quartz sensor to measure the wheel- and axle loads and to determine the vehicle gross weight under roll-ing traffic conditions.
•Excellent long-term stability
•Wide measuring range: from slow to high-speed
•Very high natural frequency and signal dynamic
•Protected from the intrusion of water (degree of protection IP68)
•Insensitive to temperature changes
•Quick and easy installation
•Adaptive to different pavement characteristics
•Safe mounting into the pavement
•The sensor surface can be ground up to 6 mm in case of pavement deformations
Description
The Amond WIM sensor is a force sensor with quartz elements. It consists of a light metal profile of which quartz disks are fitted under preload.When a force is applied to the sensor surface, the quartz disks yield an electric charge proportional to the applied force through the piezoelectric effect.The electric charge is converted by a charge amplifier into a proportional voltage which then has to be further processed as required.The sensor has to be integrated into the road surface and is only for permanent installation.
Applications
•Traffic data collection (statistics)
•Overload detection
-Pre selection for static weight controls
-Automatic (direct) weight enforcement
-Bridge protection
•Weigh dependent tolling
•Road research
•Pavement management system (PMS)
Technical Data
Sensor
Measuring range wheel load | kN | 0 ... 150 | |
At a reference tire contact area | mm | 200x320 | |
(tread length x tread width) | |||
Max. load-bearing capacity | N/mm2 | 4,6 | |
of the sensor surface | |||
Sensitivity, nominal | pC/N | –1,5±5 % | |
Max. sensitivity shiftover sensor length | % | <±3 | |
Threshold | N | <0,5 | |
Linearity | %FSO | ≤±0.5 | |
Hysteresis | %FSO | ≤2 | |
Cable chunking resistance | N | 300 | |
Operating temperature range | °C | –40 ... 80 | |
Temperature coefficientof sensitivity | %/°C | –0,02 | |
Insulation resistance | Ω | >1 ∙ 1010 | |
Cable length | m | 30m | |
Connector | BNC | ||
Degree of protection | IP68 | ||
Dynamic Weighing Sensor Layout
According to the dynamic weighing accuracy requirements and budget requirements, a variety of sensor
layout can be adopted for the quartz type dynamic weighing system.
1、Standard layout mode: 6 sensors are used in 3 rows
2、 Economic layout mode: 4sensors are used in 2 rows
3、 High precision layout mode: 8 sensors are used in 4 row3
常见问题
