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A device and method for detecting and locating etc jammers

A technology of jammer and monitoring device, applied in color TV parts, TV system parts, transmission monitoring, etc., can solve problems such as inability to effectively trace illegal vehicles, ETC interference, etc., to facilitate tracing and punishment, and improve efficiency , the effect of recovering huge losses

Active Publication Date: 2022-03-22
成都安杰联科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the invention of the present invention is to provide a device and method for detecting and locating ETC jammers in view of the above-mentioned problems; the present invention solves the problem that vehicles interfere with ETC when passing through ETC; The problem with illegal vehicles

Method used

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  • A device and method for detecting and locating etc jammers
  • A device and method for detecting and locating etc jammers
  • A device and method for detecting and locating etc jammers

Examples

Experimental program
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Embodiment 1

[0028] A method of detecting and locating ETC jammers such as figure 1 shown, including:

[0029] S1: Set the signal power threshold value.

[0030] In the above steps, after the jammer sends out the interference signal, it will not only affect the passband of the ETC signal, but also affect the outside of the passband. When there is no interference, the signal strength outside the passband of the signal is small, which can be considered as noise; When there is interference, the signal strength outside the signal passband is greatly enhanced, which is considered to be the superposition of noise and interference signals; therefore, a frequency band outside the signal passband can be selected and a signal power threshold value can be set. When the signal power in this frequency band is less than the gate Limit value, no interference is considered; when the signal power in this frequency band is greater than the threshold value, interference is considered. In this way, the dete...

Embodiment 2

[0047] A device for detecting and locating ETC jammers such as figure 2 As shown, it includes a sensing device 1 , a monitoring device 2 and an image acquisition device 3 .

[0048] The induction device 1 is used to detect whether a vehicle passes through and triggers the detection device; in the present embodiment, the induction device 1 adopts a ground induction coil, and the ground induction coil is arranged on the ground at the entrance of the ETC. When passing by, the ground induction coil will be activated by induction, and trigger the detection device, so that the detection device starts to work.

[0049] The monitoring device 2 is used to identify whether there is interference from passing vehicles; the detection device includes a radio frequency signal receiver 21 , an analog-to-digital conversion module 22 , a processing module 23 and a storage module 24 .

[0050] RF signal receiver 21, such as image 3 As shown, it includes a monitoring antenna 211, a radio freq...

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Abstract

The invention discloses a method for detecting and locating an ETC jammer, comprising: setting a signal power threshold value; detecting a vehicle passing through a ground induction coil and triggering an interference identification device; frequency band signal, and perform passband filtering on the ETC frequency band signal; perform analog-to-digital conversion on the filtered signal; calculate the converted signal power through the signal power algorithm; judge whether the calculated signal power is greater than the threshold value, and if so, judge it as interference signal, otherwise it is determined to be a non-interference signal; when the interference signal is determined, the vehicle that generates the interference is precisely positioned through the image acquisition device; the present invention judges whether it is The interference signal can accurately identify whether the received signal is an interference signal; the image acquisition device can accurately record the information of the vehicle that sent the interference signal, which facilitates the tracing and punishment of illegal vehicles in the later stage.

Description

technical field [0001] The invention relates to the field of signal monitoring, in particular to a device and method for detecting and locating an ETC jammer. Background technique [0002] With the continuous development of highways, the number of cars on the highway is also increasing. In order to speed up the efficiency of cars passing through toll stations, the ETC system came into being; in the ETC system, the electronic label (OBU) is placed on the car, and the road The measurement unit (RSU-Road Side Unit) is placed on the gantry. When the vehicle passes through the RSU, microwave communication is used between the OBU and the RSU to realize charging. At present, some criminals use radio jammers to interfere with the toll collection system of ETC to achieve the purpose of evading tolls, causing certain economic losses, and have a relatively large negative impact on the development of expressway non-stop toll collection. Therefore, there is a need for a device and metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/10H04N5/232H04N5/76
CPCH04B17/102H04N5/76H04N23/66
Inventor 郑智文赖远萱
Owner 成都安杰联科技有限公司
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