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Wake-up module, vehicle-mounted unit and method for waking up vehicle-mounted unit

A wake-up module and signal technology, applied in the field of intelligent transportation, can solve problems such as car-following interference, increased quiescent current, and increased battery power consumption, and achieve the effects of strong anti-interference ability, shortened service life, and high sensitivity

Inactive Publication Date: 2015-12-30
SHENZHEN GENVICT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method will definitely increase its quiescent current, increase battery power consumption, and seriously shorten the service life of the OBU
Moreover, the improvement of sensitivity is also likely to cause car-following interference and adjacent channel interference.
In addition, in the current technology, the improvement of sensitivity will inevitably lead to the deterioration of anti-interference, that is, in the complex electromagnetic environment outside, there are 2G / 3G wireless network, WIFI network, mobile phone communication network, highway radar speed measurement signal, etc., these signals Although they are in different frequency ranges, this will cause the OBU to be awakened by mistake, which will seriously shorten the service life of the OBU

Method used

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  • Wake-up module, vehicle-mounted unit and method for waking up vehicle-mounted unit
  • Wake-up module, vehicle-mounted unit and method for waking up vehicle-mounted unit
  • Wake-up module, vehicle-mounted unit and method for waking up vehicle-mounted unit

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the vehicle-mounted unit of the present invention, an embodiment thereof, includes a control module, a wake-up module and a transceiver module, and the control module is used to determine the sensitivity according to the attenuation value of the received signal of the vehicle-mounted unit that is not blocked by the windshield of the automobile, so The wake-up module or transceiver module is used to start work when the sensitivity is reached.

[0033] The vehicle-mounted unit of the present invention may further include a storage module, the storage module is used to store the sensitivity gear information table, and the control module is also used to obtain the sensitivity of the vehicle-mounted unit according to the sensitivity gear and the sensitivity gear information table. The sensitivity gear information table includes sensitivity gears and their corresponding sensitivities. Sensitivity levels can be obtained through testing with a handse...

Embodiment approach

[0039] Such as Figure 5 As shown, the method for waking up the vehicle-mounted unit of the present invention, an implementation thereof, comprises the following steps:

[0040] Step 502: Obtain the attenuation value of the signal received by the vehicle-mounted unit installed in the windshield of the vehicle;

[0041] Step 504: Determine the sensitivity of the vehicle-mounted unit according to the attenuation value;

[0042] Step 506: wake up the vehicle unit according to the sensitivity;

[0043] Step 508: Establish a communication connection between the vehicle-mounted unit and the roadside unit.

[0044] In the method for waking up the vehicle-mounted unit of the present invention, step 502 may specifically include the following steps:

[0045] Step 5022: Obtain the signal strength value of the vehicle-mounted unit that is not blocked by the windshield of the vehicle.

[0046] When the OBU is inserted into the pure carrier test IC card, the OBU recognizes the pure carr...

Embodiment 3

[0074] The method for detecting the sensitivity gear of the vehicle-mounted unit of the present invention, one embodiment thereof, comprises the following steps:

[0075] Step 702: Obtain the attenuation value of the car windshield to the signal received by the OBU;

[0076] Step 704: Determine the sensitivity level of the OBU according to the attenuation value.

[0077] In the method for detecting the sensitivity of the vehicle-mounted unit of the present invention, step 702 may specifically include the following steps:

[0078] Step 7022: Obtain the signal strength value of the vehicle-mounted unit that is not blocked by the windshield of the vehicle.

[0079]When the OBU is inserted into the pure carrier test IC card, the OBU recognizes the pure carrier test IC card, activates the radio frequency circuit, and transmits a high-frequency pure carrier signal with a certain signal strength. The detection equipment is aimed at the OBU at a certain fixed distance from the OBU, ...

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Abstract

The invention discloses a wake-up module, a vehicle-mounted unit and a method for waking up a vehicle-mounted unit. The wake-up module comprises an antenna, a high-pass / band pass filer, a demodulation circuit, a signal low-multiple amplifier and a zero-crossing frequency detection circuit, wherein the antenna is used for receiving signals, the signals successively pass through the high-pass / band pass filter and the demodulation circuit to demodulate wake-up signals, and after the wake-up signals pass through the signal low-multiple amplifier and the zero-crossing frequency detection circuit, when the wake-up signals are baseband signals with a frequency of 11KHZ to 25KHZ, the wake-up module generates interruption signals. By implementing the technical scheme provided by the invention, the power consumption is low, and the anti-interference capability is high.

Description

[0001] This application is a divisional application with the application number 201210578712.2, the filing date is December 27, 2012, and the title of the invention is "the method for waking up the vehicle-mounted unit, the method for detecting the sensitivity level of the vehicle-mounted unit, and the vehicle-mounted unit". technical field [0002] The invention relates to the field of intelligent transportation, in particular to a wake-up module, a vehicle-mounted unit and a method for waking up the vehicle-mounted unit. Background technique [0003] With the development of the automobile industry, automobile windshields with thermal insulation design are becoming more and more popular on vehicles. This kind of glass adds metal ion components to the material, which is transparent to visible light, but can absorb energy from other radiation spectrums such as infrared and ultraviolet rays. Insulated windshields are widely used in imported high-end cars, and ordinary models o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07B15/06
Inventor 张可和向涛陈静
Owner SHENZHEN GENVICT TECH