| 摘要 |
<p>A wireless traffic flow detector. A magnetic reluctance sensor that is not easily susceptible to magnetization is used as a front-end sampling sensor. Geomagnetic disturbance signals affected by motor vehicles are obtained, amplified by an amplifier, converted from analog to digital and transmitted to a single-chip microcomputer CPU. The single-chip microcomputer CPU determines the travel state of a vehicle passing thereover by means of a compute, learn, approach, and drift processing method, and sends the travel state to another receiving and processing device in a public communication protocol through a wireless module, wherein all circuits are powered by a battery. The wireless traffic flow detector is complete, simple, small in size, low in power consumption, can communicate over long distances, utilizes an excellent algorithm, requires little maintenance, and is low in cost. A vehicle detection technology using a geomagnetic rod for sensing transmits detection signals in a wirelessly, thus implementing wireless vehicle detection. Installation is convenient and does not require lane closures or disruption to large areas of road surface. The built-in battery is used for supplying power and service life is long.</p> |
