| 摘要 |
The invention relates to a method for determining the weight of moving motor vehicles without restricting in any way the traffic of the motor vehicles to be weighed and to a device applying the method. The claimed method measures the variation of the optical power transmitted through an optical fiber depending on the applied variable weight, by using an optoelectronic device with a single mode or multi-mode optical fiber wherethrough there is propagated a luminous radiation with the wavelength in the near infrared spectral range emitted in continuous wave regime by a laser diode or a LED, the optical fiber being mounted into a mechanical device which ensures its bending depending on the weight to be measured. The claimed device comprises a near infrared radiation source () which may be a laser diode or a LED, said laser diode or LED injecting the infrared radiation through an optical fiber () bending under the weight of the weighed motor vehicle within the fiber bending assembly consisting of two fixed cylindrical supports () and a mobile cylindrical support (), modifying the power of the radiation transmitted through the optical fiber (), the said modification being recorded by a photodiode () which generates a voltage measured by means of an acquisition board () connected to a computer (). |
