CN107862231B - System for preventing electronic tag from being awakened by mistake - Google Patents
System for preventing electronic tag from being awakened by mistake Download PDFInfo
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- CN107862231B CN107862231B CN201711179905.XA CN201711179905A CN107862231B CN 107862231 B CN107862231 B CN 107862231B CN 201711179905 A CN201711179905 A CN 201711179905A CN 107862231 B CN107862231 B CN 107862231B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
- G07B15/06—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems
- G07B15/063—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems using wireless information transmission between the vehicle and a fixed station
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Abstract
The invention discloses a system for preventing electronic tags from being awoken by mistake, which comprises a 5.8G communication module, wherein the 5.8G communication module comprises a 5.8G chip transmitting circuit, an awoken circuit, an RSSI detection circuit and a 5.8G chip receiving circuit, the RSSI detection circuit is electrically connected with the 5.8G chip receiving circuit in series, the RSSI detection circuit is electrically connected with the 5.8G chip transmitting circuit in series, the awoken circuit is electrically connected with an interruption detection module in series, the interruption detection module is electrically connected with an awoken pulse period detection module in series, the awoken pulse period detection module is electrically connected with the RSSI detection circuit in series, and the 5.8G chip receiving circuit is electrically connected with an RSSI sampling gap module in series. This prevent electronic tags mistake system of awakening up, through opening and closing of RSSI sampling gap module control RSSI detection module, reach the purpose of low-power consumption for equipment work is more stable.
Description
Technical Field
The invention relates to the technical field of intelligent traffic, in particular to a system for preventing an electronic tag from being awakened by mistake.
Background
ETC (Electronic Toll Collection ) refers to an Electronic Toll Collection system in which vehicle identification, information writing and automatic deduction of corresponding funds from an IC card can be realized by an on-board unit OBU when a vehicle passes through a Toll station. The ETC mainly comprises an OBU and an RSU, wherein the RSU sends out radio frequency signals through a microwave antenna, and when the OBU receives radio frequency wake-up signals sent by the RSU, the radio frequency wake-up signals are started to be received, and vehicle information writing, money deduction operation and the like are completed.
With the development of the mobile internet, 3G and 4G networks develop at a speed exceeding the speed imagined by all people, in order to meet scene application, operators increase the coverage of the 3G and 4G networks, different frequency bands and awakening sources with different signal strengths may exist in the practical application environment of the ETC system, and the awakening sources continuously transmit radio frequency signals; however, these radio frequency signals are not emitted by the RSU and do not belong to a wake-up signal (also called a false wake-up signal) of the OBU, and the OBU will perform frequent false wake-up under the action of these false wake-up signals, so that the power of the OBU is consumed suddenly until the power is consumed, and the service life of the OBU is greatly reduced; the situation is particularly serious when a mobile phone repeater or other strong signals exist in a vehicle parking place, so that a system for preventing the electronic tag from being awakened by mistake is provided.
Disclosure of Invention
The present invention is directed to a system for preventing an electronic tag from being mistakenly awakened, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a prevent electronic tags mistake system of awakening up, includes 5.8G communication module, 5.8G communication module includes 5.8G chip transmitting circuit, awaken circuit, RSSI detection circuitry and 5.8G chip receiving circuit electrical property are established ties, awaken circuit and interrupt detection module electrical property and establish ties, interrupt detection module and awaken pulse cycle detection module electrical property and establish ties, awaken pulse cycle detection module and RSSI detection circuitry electrical property and establish ties, 5.8G chip receiving circuit and RSSI sampling gap module electrical property are established ties, RSSI sampling gap module and RSSI detection circuitry electrical property are established ties.
Preferably, the RSSI sampling gap module, the interrupt detection module and the wake-up pulse period detection module constitute a micro-control system.
Preferably, the working steps of the system are as follows:
1. when no radio frequency signal exists, the micro control system and the 5.8G communication module are in a dormant state;
2. when a wake-up circuit in a 5.8G communication module detects a radio frequency signal containing a 14K modulation signal in a space, a wake-up pulse signal is output to an interrupt detection module of a micro control system, at the moment, the wake-up pulse period detection module is triggered, the wake-up pulse period detection module detects the time interval (namely the period) of each wake-up pulse in set time, the period in the wake-up pulse reaches a preset gate value, the micro control system enters a process RSSI detection state, an RSSI detection circuit and an RSSI sampling interval module are started, the RSSI sampling interval module starts and closes an RSSI detection circuit in set time, the RSSI sampling interval module compares the RSSI average value obtained by sampling the RSSI detection circuit with the preset gate value in the process RSSI detection state to detect whether the RSSI average value reaches an expected value or not, and if the RSSI average value reaches the preset gate value, the micro control system enters a 5.8G receiving circuit in the start communication module, and the flow entering micro control system starts a receiving circuit of the 5.8G communication module to enter a receiving state, after the receiving is successful, the 5.8G chip transmitting circuit is started after the analysis according to the protocol, otherwise, the other module micro control system and the 5.8G communication module are closed to be in a dormant state, and the micro control system returning to the flow is in an interrupted state.
Preferably, the wake-up pulse period detection module, when the wake-up interrupt signal outputted by the interrupt detection module enters the wake-up pulse period detection module, the micro control system starts the period of the RTC counter detecting the interrupt signal at this time, and the time counted by the RTC can be set according to the time interval of BST in the national standard ETC standard.
Preferably, the RSSI detection circuit 13 and the RSSI sampling interval module work in a linkage manner, the RSSI sampling interval module can work according to the preset time and sampling times of the micro control system, the sampling interval and the sampling times can be flexibly adjusted according to the actual situation, after the sampling is finished, whether the average RSSI value of the process detection reaches the expectation is judged, if the average RSSI value reaches the expectation, the micro control system starts the 5.8G chip receiving circuit of the 5.8G communication module, otherwise, the micro control system and the 5.8G communication module enter the sleep state again to wait for the next wake-up signal.
Compared with the prior art, the invention has the beneficial effects that: the system for preventing the electronic tag from being awakened by mistake controls the RSSI detection module to be turned on and off through the RSSI sampling gap module, achieves the purpose of low power consumption, meets the requirement of the sampling times of the RSSI and obtains the average value to be compared with the preset gate value. And if the wake-up pulse of the wake-up signal meets the requirement, detecting the power value of the radio frequency signal RSSI, starting the 5.8G communication module to start receiving the data frame if the power value of the radio frequency signal RSSI reaches a preset gate value, otherwise, closing the wake-up pulse period detection module, the RSSI power detection module and the RSSI sampling gap module by the MCU, and entering a dormant state, so that the equipment works more stably.
Drawings
FIG. 1 is a schematic view of the structural principle of the present invention;
FIG. 2 is a schematic flow chart of the structural principle of the present invention;
FIG. 3 is a schematic diagram illustrating a flow chart of whether the wake-up pulse signal is detected according to the present invention.
In the figure: the device comprises a 15.8G communication module, a 115.8G chip transmitting circuit, a 12 awakening circuit, a 13 RSSI detection circuit, a 145.8G chip receiving circuit, a 2 micro-control system, a 21 RSSI sampling gap module, a 22 interrupt detection module and a 23 awakening pulse period detection module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a system for preventing an electronic tag from being awakened by mistake comprises a 5.8G communication module 1, wherein the 5.8G communication module 1 comprises a 5.8G chip transmitting circuit 11, an awakening circuit 12, an RSSI detection circuit 13 and a 5.8G chip receiving circuit 14, the RSSI detection circuit 13 and the 5.8G chip receiving circuit 14 are electrically connected in series, the RSSI detection circuit 13 and the RSSI sampling interval module 21 work in a linkage way, the RSSI sampling interval module 21 works according to the time and the sampling times preset by the micro control system 2, the sampling interval and the sampling times can be flexibly adjusted according to the actual situation, whether the RSSI average value of the process detection reaches the expected value or not can be judged after the sampling is finished, if the RSSI average value reaches the expected value, the micro control system will turn on the 5.8G chip receiving circuit 14 of the 5.8G communication module 1, otherwise the micro control system 2 and the 5.8G communication module 1 enter the sleep state again to wait for the next wake-up signal. The wake-up circuit 12 is electrically connected in series with the interrupt detection module 22, the interrupt detection module 22 is electrically connected in series with the wake-up pulse period detection module 23, the wake-up pulse period detection module 23 enters the wake-up pulse period detection module 23 when the wake-up interrupt signal output by the interrupt detection module 22, the micro control system 2 starts the period of the RTC counter to detect the interrupt signal at this moment, the time counted by the RTC can be set according to the time interval of BST in the national standard ETC standard, but is not limited to this value, and can be flexibly adjusted. The wake-up pulse period detection module 23 is electrically connected in series with the RSSI detection circuit 13, the 5.8G chip receiving circuit 14 is electrically connected in series with the RSSI sampling gap module 21, the RSSI sampling gap module 21 is electrically connected in series with the RSSI detection circuit 13, the RSSI sampling gap module 21, the interrupt detection module 22 and the wake-up pulse period detection module 23 form the micro-control system 2, and the working steps of the system are as follows: 1. when no radio frequency signal exists, the micro control system 2 and the 5.8G communication module 1 are in a dormant state; 2. when the wake-up circuit 12 in the 5.8G communication module 1 detects a radio frequency signal containing a 14K modulation signal in a space, a wake-up pulse signal is output to the interrupt detection module 22 of the micro control system 2, at this time, the wake-up pulse period detection module 23 is triggered, the wake-up pulse period detection module 23 detects a time interval (i.e., a period) of each wake-up pulse within a set time, and the period in the wake-up pulse reaches a preset gate value, the micro control system 2 enters a process RSSI detection state, and starts the RSSI detection circuit 13 and the RSSI sampling interval module 21, the RSSI sampling interval module 21 turns on and off the RSSI detection circuit 13 at the set time, and the RSSI average value obtained by sampling the RSSI detection circuit 13 in the process RSSI detection state is compared with the preset gate value to determine whether the RSSI average value reaches an expected value or not, and if the RSSI average value reaches the preset gate value, the 5.8G receiving circuit 14 in the communication module is turned on, and the micro control system entering the process starts a receiving circuit of the 5.8G communication module to enter a receiving state, otherwise, the micro control system 2 and the 5.8G communication module 1 of other modules are closed to be in a dormant state, and the micro control system returning the process is in an interrupted state.
The working principle is as follows: when the OBU detects that the wake-up signal is mistakenly woken up, the micro-control system 2 works in an interrupt detection state and starts the wake-up pulse period detection module 23, the wake-up pulse period detection module 23 in the micro-control system 2 can judge whether the period of the wake-up pulse signal meets the protocol requirement and meets the requirement, the RSSI detection circuit 13 is started, the RSSI power value of the 5.8G frequency band is judged whether the RSSI power value reaches the preset gate value, if the RSSI power value reaches the preset gate value, the receiving circuit of the OBU is started, and otherwise, the sleep state is maintained. The RSSI detection in the 5.8G communication module 1 is narrow-band reception in a 5.8G frequency band, the out-of-band rejection ratio is higher, particularly, the 3G and 4G networks in interference frequency bands are strongly inhibited, interference signals can be effectively filtered through the RSSI power value of radio frequency signals, and the OBU can be effectively prevented from being awoken by mistake through two-stage awakening thresholds.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a prevent that electronic tags mistake awakens system up, includes 5.8G communication module (1) and micro-control system (2), its characterized in that: the 5.8G communication module (1) includes 5.8G chip transmitting circuit (11), awaken circuit (12), RSSI detection circuit (13) and 5.8G chip receiving circuit (14) electrical series connection, awaken circuit (12) and interrupt detection module (22) electrical series connection, interrupt detection module (22) and awaken pulse cycle detection module (23) electrical series connection, awaken pulse cycle detection module (23) and RSSI detection circuit (13) electrical series connection, 5.8G chip receiving circuit (14) and RSSI sampling gap module (21) electrical series connection, RSSI sampling gap module (21) and RSSI detection circuit (13) electrical series connection.
2. The system for preventing the electronic tag from being awoken by the user according to claim 1, wherein: the RSSI sampling gap module (21), the interruption detection module (22) and the wake-up pulse period detection module (23) form a micro-control system (2).
3. The system for preventing the electronic tag from being awakened by mistake according to claim 1 or 2, wherein: the working steps of the system are as follows:
1. when no radio frequency signal exists, the micro control system (2) and the 5.8G communication module (1) are in a dormant state;
2. when a wake-up circuit (12) in a 5.8G communication module (1) detects a radio frequency signal containing a 14K modulation signal in a space, a wake-up pulse signal is output to an interrupt detection module (22) of a micro-control system (2), a wake-up pulse period detection module (23) is triggered at the moment, the wake-up pulse period detection module (23) detects the time interval of each wake-up pulse in a set time, namely the period, the period in the wake-up pulse reaches a preset gate value, then the micro-control system (2) enters a process RSSI detection state, an RSSI detection circuit (13) and an RSSI sampling interval module (21) are started, the RSSI sampling interval module (21) opens and closes the RSSI detection circuit (13) in the set time, and the average RSSI value obtained by sampling the RSSI detection circuit (13) in the process RSSI detection state is compared with the preset gate value to detect whether the average RSSI reaches an expected value or not, if the preset gate value is reached, the 5.8G receiving circuit (14) in the communication module is started, the flow micro-control system starts the receiving circuit of the 5.8G communication module (1) to enter a receiving state, otherwise, the other module micro-control systems (2) and the 5.8G communication module (1) are closed to be in a dormant state, and the micro-control system returning to the flow is in an interrupted state.
4. The system for preventing the electronic tag from being awoken by the user according to claim 1, wherein: awakening pulse period detection module (23), when the awakening interrupt signal that interrupt detection module (22) output gets into awakening pulse period detection module (23), micro control system (2) starts the period that RTC counter detected the interrupt signal this moment, and the time of RTC count can be according to the time interval setting of BST in the national standard ETC standard.
5. The system for preventing the electronic tag from being awoken by the user according to claim 1, wherein: the RSSI detection circuit (13) and the RSSI sampling interval module (21) work in a linkage mode, the RSSI sampling interval module (21) works according to the time and the sampling times preset by the micro-control system (2), the sampling interval and the sampling times can be flexibly adjusted according to actual conditions, whether the RSSI average value of process detection reaches expectation or not can be judged after sampling is finished, if the RSSI average value reaches the expectation, the micro-control system starts the 5.8G chip receiving circuit (14) of the 5.8G communication module (1), otherwise, the micro-control system (2) and the 5.8G communication module (2) enter a sleep state again, and the next wake-up signal is waited.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711179905.XA CN107862231B (en) | 2017-11-23 | 2017-11-23 | System for preventing electronic tag from being awakened by mistake |
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| CN201711179905.XA CN107862231B (en) | 2017-11-23 | 2017-11-23 | System for preventing electronic tag from being awakened by mistake |
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| CN107862231A CN107862231A (en) | 2018-03-30 |
| CN107862231B true CN107862231B (en) | 2021-02-19 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109634168B (en) * | 2018-12-05 | 2020-02-07 | 智恒科技股份有限公司 | Method for processing sensor pulse signal |
| SG11202101384WA (en) * | 2018-12-17 | 2021-03-30 | Zhiheng Technology Co Ltd | Sensor pulse signal processing method |
| CN111277285A (en) * | 2020-03-12 | 2020-06-12 | 深圳成谷科技有限公司 | Radio frequency chip signal receiving method, device and system |
| WO2022198408A1 (en) * | 2021-03-22 | 2022-09-29 | 浙江吉利控股集团有限公司 | Vehicle, in-vehicle infotainment system startup control method and apparatus, device, and storage medium |
| CN117560753B (en) * | 2024-01-11 | 2024-03-12 | 广州铭创通讯科技有限公司 | OBU (on-board unit) false wake-up and portal transaction success rate optimization method |
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