GNOM axle load sensors are used in vehicle telematics systems (vehicle monitoring) to control axle load, determine cargo weight, and prevent axle overload in vehicles with spring or air suspension.
Tasks
Load control and cargo weight control
No fines exceeding existing limits
Driver monitoring, no underhand cargo
Maintenance сost reductionOperation Principles
On vehicles with leaf spring suspension
GNOM DP measures axle load using a pivot lever that is installed on a vehicle suspension. The sensor is mounted between the cargo bed (or the car frame) and the sprung axle. Sensor output voltage changes with the lever position. A tracking device receives the signal from the sensor and transmits it to the fleet monitoring server. The server software processes the data and generates axle and cargo load reports.
On vehicles with air suspension
GNOM DDE operation principle is based on transformation of compressed air pressure into output voltage. Tensoresistive bridge is used as a transducer. The output of the sensor generates stabilized analog voltage signal. Voltage signal varies depending on pressure in the vehicle air suspension circuit coming through the inlet thread fitting to the transducer.
Axle load sensor GNOM DP
| Output voltage range, V | 1.54…3.46 |
| Absolute error of output voltage generating, mV, not more than | ±80 |
| Supply voltage range, V | 8…32 |
| Ingress Protection Rating | IP55 |
| Operation temperature range, ºС | -40…+80 |
| Weight, g, not more than | 800 |
Axle load sensor GNOM DDE
| Inlet pressure, MPa | 0…0.8 |
| Supply voltage, V | 8…32 |
| Ingress Protection Rating | IP55 |
| Thread | М16х1,5 |
| Operating temperature, °С | -40…+80 |
| Weight, g, not more than | 150 |
Wireless axle load sensor for leaf spring suspension
| Measuring range of the angle of rotation of the lever, deg | 0 … 360 |
| Inaccuracy, ± % | 1,5 |
| Interface | Bluetooth 4.X |
| Tx power, dBm | + 4 |
| Rx sensitivity, dBm | – 88 |
| Line-of-sight distance, m, not less than | 50 |
| Battery life, years, not less than | 5 |
| Operating temperature, ºC | -40…+80 |
| Ingress protection rating (IP Сode) | IP55 |
Wireless axle load sensor for air suspension
| Method of pressure measurement | Piezoresistive |
| Pressure measurement range, MPa | 0,1…1,4 |
| Allowed tolerance of reducial error of pressure measurement, %, not more than | ±1,0 |
| Wireless data transfer interface | Bluetooth 4.X |
| Transmitter power (Tx Power), dBm | +4 |
| Transmitter sensitivity (Rx Power), dBm | -88 |
| Maximum distance between sensor and receiving device, m | 45 (in conditions of direct visibility) |
| Data transfer interval, s | 5 |
| Estimated lifetime of the sensor (battery life), years | up to 5* |
| Temperature range, °C | -40…+80 |
| Ingress protection rating | IP67 |
| Certificates of BLE module electromagnetic compatibility | CE, FCC и IC, TELEC, BQE |
| Connection thread | М16х1,5; M22x1,5** |
| Weight, g, not more than | 0,15 |
| Overall dimensions, mm, not more than | 112×42 |
| * Depending on ambient temperature and humidity. | |
| ** Using the adapter nut from the mounting kit GNOM MK DDE1. |
