A wireless transducer network device based on unloading lot detection based on magnetic sensitive technology

A technology of wireless sensors and network devices, which is applied in the direction of measuring devices, indicating various open spaces in parking lots, traffic control systems of road vehicles, etc., can solve the problems of high system maintenance costs, large coil volume, short coil life, etc., and achieve vehicle Accurate detection, broad application prospects, and low cost effects

Inactive Publication Date: 2008-07-09
JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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[0004] The present invention aims to solve the problems that the existing parking space detectors have large volu

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  • A wireless transducer network device based on unloading lot detection based on magnetic sensitive technology
  • A wireless transducer network device based on unloading lot detection based on magnetic sensitive technology

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[0018] The present invention will be further described below with reference to the drawings and embodiments.

[0019] As shown in the figure, the present invention consists of an anisotropic magnetoresistive sensor (AMR sensor), filter noise reduction unit (module), DC bias unit (module), differential amplifier unit (module), control unit (module) and radio frequency unit (Module) composition. The anisotropic magnetoresistive sensor (AMR sensor) is a dual-axis sensor, including sensor A axis and sensor B axis. The two sensitive axes are placed in the direction perpendicular to the ground and parallel to the parking space, so that it is perpendicular to the ground and parallel to the parking space. Real-time collection of geomagnetic field changes caused by cars passing by in two directions of the parking space, and output corresponding voltage signals. The filter noise reduction unit includes filter noise reduction units A and B, the DC bias unit includes DC bias units A and B, an...

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Abstract

The invention belongs to a wireless sensor network field, and relates to a wireless sensor network device for detecting parking state by using magnetic-sensing technology. The device comprises an anisotropic magneto-resistance sensor, a filtering/de-noising unit, a differential amplification unit, a DC bias unit, a control unit, and a radio frequency unit. By conducting pre-processing an signal output from the anisotropic magneto-resistance sensor, the device can calculate parking state of the anisotropic magneto-resistance sensor at a parking position in real time by a corresponding calculation method, and send data to a base station via a wireless transmission communication mode for performing vehicle control and vehicle induction. The device has wide application prospect in road traffic stream detection, parking lot management, road intersection management, etc.

Description

technical field [0001] The invention belongs to the field of wireless sensor networks, in particular to a wireless sensor network device for detecting parking spaces based on magnetic sensitivity technology. Background technique [0002] With the rapid development of social economy and the general improvement of people's living standards, the number of various vehicles has increased rapidly, which not only requires a large number of parking lots, but also requires effective detection of parking spaces in the parking lot. The existing detection of parking spaces in parking lots adopts traditional parking space detectors, which detect the presence or absence of vehicles by embedding inductance coils under the ground. The disadvantage of this method is that the coil is bulky, the coil laying seriously damages the ground, the coil life is short, and the system maintenance cost is high. Contents of the invention [0003] The object of the present invention is to provide a wire...

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Application Information

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IPC IPC(8): G08G1/14G08G1/042G01R33/09
Inventor 李中一李保海吴波姜华郑春雷刘海涛张帆周璐巍鲍星合赵康
Owner JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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