Unlock instant, AI-driven research and patent intelligence for your innovation.

Device for position determination by means of radio waves

A technology of radio waves and azimuth angles, applied in radio wave measurement systems, radio wave reflection/reradiation, measurement devices, etc.

Inactive Publication Date: 2005-02-16
COMBITECH TRAFFIC SYSTEMS AB
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this structure makes the antenna have a certain physical range, which limits the reduction of the distance d

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device for position determination by means of radio waves
  • Device for position determination by means of radio waves
  • Device for position determination by means of radio waves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Figure 5 Means for determining the position of an object traveling along a path are shown. The device comprises an amplification and signal processing unit 17 connected to a signal processor 18, having an antenna structure of array antennas 1 and 2 arranged along a first axis perpendicular to the direction of travel of the object. According to Fig. 3, the antenna structure includes two rows of conductive surfaces, antenna elements. In this way, the array antenna 1 is composed of 5 surfaces, ie antenna elements 5 - 9 , ie the antenna elements 6 - 9 are arranged on the outside around the central antenna element 5 . In the same manner, the array antenna 2 is composed of a central antenna element 10 and peripheral antenna elements 10-14. Through the output wires 15 and 16, the antenna elements in the corresponding arrays are combined to form two array antennas 1 and 2. With the arrangement described above, arranged symmetrically around the central antenna elements 5 and...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A device for determining the position of a vehicle on a roadway by using radio waves which are emitted from the device and reflected by the vehicle and received by at least two array antennas (1, 2) arranged across the roadway, wherein the array antennas (1, 2) comprise a number of antenna elements (5-14), one of the antenna elements in the respective array antenna constituting the phase center (5, 10) of the array antennas, and wherein the antenna elements (5-14) of the array antennas are connected to one another such that the distance (d) between the phase centers (5, 10) of the array antennas (1, 2) included is smaller than half the width of an individual array antenna (1, 2).

Description

technical field [0001] The present invention relates to a device for determining position by means of radio waves, preferably microwaves. More specifically, the invention relates to continuous position determination of vehicles on roads. Background technique [0002] In methods of determining position by means of radio waves, a radio frequency signal is emitted (preferably in the microwave range), in which case the signal has good directionality and is reflected from an object or re-emitted by the device intended for it nature. The reflected signal is received by means of two antennas arranged at a distance apart in a plane substantially perpendicular to the direction of the object. Depending on the distance between the antennas, radio waves reflected by an object will have a longer trip to one of the antennas than to the other. The difference in the distance traveled will cause a phase difference between the received signals. According to the phase difference, the refer...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/46G01S13/87H01Q9/04H01Q21/06
CPCH01Q9/0457G01S13/87G01S13/46H01Q21/065G01S13/74
Inventor 哈肯·洛弗森
Owner COMBITECH TRAFFIC SYSTEMS AB