CN104570007A - Communication antenna anti-damage circuit of vehicle-mounted GNSS (global navigation satellite system) terminal - Google Patents
Communication antenna anti-damage circuit of vehicle-mounted GNSS (global navigation satellite system) terminal Download PDFInfo
- Publication number
- CN104570007A CN104570007A CN201310496255.7A CN201310496255A CN104570007A CN 104570007 A CN104570007 A CN 104570007A CN 201310496255 A CN201310496255 A CN 201310496255A CN 104570007 A CN104570007 A CN 104570007A
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- Prior art keywords
- antenna
- switch
- built
- mcu
- electric capacity
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a communication antenna anti-damage circuit of a vehicle-mounted GNSS (global navigation satellite system) terminal. A wireless communication module collects signals of a wireless network in real time, an MCU (microprogrammed control unit) compares and analyzes the quality of the signals, when the wireless signals collected by the wireless communication module change abnormally, the MCU tries to control a radio frequency switch to switch antenna signals into a built-in antenna, and if signals collected by the built-in antenna are also abnormal, the MCU controls the radio frequency switch to repeatedly be switched between the built-in antenna and an external antenna according to the collected data and performs comparison and analysis to determine whether the wireless network is abnormal; if the signals collected by the switched built-in antenna are normal, the external antenna breaks down or is damaged, and the terminal sends an external antenna abnormity pre-warning to a monitoring center and continues working through the built-in antenna. The communication antenna anti-damage circuit solves the problem that the external communication antenna is prone to be damaged, after the external communication antenna is damaged or disassembled, automatic identification can be realized, the standby antenna is enabled, and the damage information of the external antenna is sent to the monitoring center for pre-warning.
Description
Technical field
The present invention relates to automotive electronic technology, that be specifically related to is a kind of vehicle-mounted GNSS(Global Navigation Satellite System) terminal called antenna decomposing prevention circuit.
Background technology
Antenna is the key components of the wireless telecommunications systems such as vehicle-mounted GNSS terminal, vehicle-mounted GNSS terminal generally has two cover antennas, is respectively GNSS antenna and communication antenna.GNSS antenna belongs to Active Receiving Antenna, and for receiving the locating information of satellite, GNSS terminal is powered to the signal amplification circuit on GNSS antenna, just can determine whether antenna opens a way short circuit by detecting the DC current of antenna loop; And communication antenna is transmitting-receiving bidirectional antenna, be responsible for communication between terminal and base station, what the communication antenna of vehicle-mounted GNSS terminal often adopted is passive antenna, and without DC loop, the short circuit (destruction) of opening of antenna is not easy detection; Communication antenna is divided into external antenna and built-in aerial, built-in aerial is by terminal installation site and structural limitations, there is the problem of transmitting-receiving poor-performing, therefore in order to ensure good signal transmitting and receiving, the communication antenna of current vehicle-mounted GNSS terminal often adopts external antenna, although external antenna signal transmitting and receiving ability is strong, but be easily destroyed, and vehicle-mounted GNSS terminal cannot judge that terminal is in signal blind zone or antenna by artificial destruction after destroying, after destruction also cannot with the timely early warning of Surveillance center's communication.
Summary of the invention
For this reason, the object of the present invention is to provide a kind of vehicle-mounted GNSS terminal called antenna decomposing prevention circuit, to prevent the external communication antenna of vehicle-mounted GNSS terminal to be easily destroyed, and destroy after cannot with the problem of the timely early warning of Surveillance center's communication.
The object of the invention is to be achieved through the following technical solutions.
A kind of vehicle-mounted GNSS terminal called antenna decomposing prevention circuit, comprising: wireless communication module, MCU, radio-frequency (RF) switch D1, built-in communication antenna ANT1 and external communication antenna ANT2, adopt UART communication between described MCU and wireless communication module, the radiofrequency signal (RF) of described wireless communication module to be held with the COM of radio-frequency (RF) switch D1 by electric capacity C1 and is connected, the output control signal K1 of described MCU is held with the V1 of radio-frequency (RF) switch D1 by resistance R2 and is connected, the output control signal K2 of MCU is held with the V2 of radio-frequency (RF) switch D1 by resistance R1 and is connected, the IO1 of described radio-frequency (RF) switch D1 holds the electric capacity C2 by connecting, inductance L 1 is connected with built-in communication antenna ANT1, and one end of inductance L 1 is by electric capacity C5 ground connection, and the other end is by electric capacity C7 ground connection, the IO2 of described radio-frequency (RF) switch D1 holds the electric capacity C3 by connecting, inductance L 2 and antenna connector J1, J2 to be connected with external communication antenna ANT2, and one end of inductance L 2 is by electric capacity C4 ground connection, and the other end is by electric capacity C6 ground connection, wherein when external communication antenna ANT2 normally uses, MCU is by control signal K1, the COM end that K2 controls radio-frequency (RF) switch D1 holds conducting with IO2, the radiofrequency signal (RF) of wireless communication module is coupled to every being directly coupled to COM end, COM end and IO2 conducting, IO2 the π type filtering circuit be made up of C4, L2, C6 by by electric capacity C1 by electric capacity C3, then external communication antenna ANT2 is connected to by connector J1, J2, wireless communication module gathers wireless network signal quality, for MCU compare of analysis by external communication antenna ANT2 in real time, when the wireless signal that wireless communication module collects has ANOMALOUS VARIATIONS, MCU can pass through K1, K2 controls radio-frequency (RF) switch D1 and aerial signal is switched to COM and IO1 conducting, the radiofrequency signal (RF) of wireless communication module will by electric capacity C1 every being directly coupled to COM end, due to COM and IO1 conducting, IO1 is coupled to by C5 by electric capacity C2, L1, the π type filtering circuit of C7 composition, be connected to built-in communication antenna ANT1, if the signal that built-in aerial ANT1 gathers is also abnormal, MCU can repeatedly switch image data comparison according to the Data Control radio-frequency (RF) switch D1 gathered between built-in communication antenna ANT1 and external communication antenna ANT2, to be confirmed whether as wireless network is abnormal, if the signal being switched to built-in communication antenna ANT1 collection is normal, external antenna ANT2 fault or destroyed is then described, terminal sends external antenna abnormity early warning to Surveillance center, terminal utilizes built-in communication antenna ANT1 to work on.
Preferably, described radio-frequency (RF) switch D1 is SKY13270-92LF.
The present invention compared with prior art, beneficial effect is: vehicle-mounted GNSS terminal called antenna decomposing prevention circuit provided by the invention, by wireless communication module Real-time Collection wireless network signal quality, for MCU compare of analysis, when the wireless signal that wireless communication module collects has ANOMALOUS VARIATIONS, MCU can attempt controlling radio-frequency (RF) switch and aerial signal is switched to built-in aerial, if the signal that built-in aerial gathers is also abnormal, MCU can repeatedly switch image data comparison according to the Data Control radio-frequency (RF) switch gathered between interior external antenna, to be confirmed whether as wireless network is abnormal; If the signal being switched to built-in aerial collection is normal, then external antenna fault or destroyed is described, terminal sends external antenna abnormity early warning to Surveillance center, and terminal utilizes built-in aerial to work on.The invention solves the problem that external communication antenna is easily destroyed, and after external communication antenna is destroyed or removes, automatically can identify, enable emergency antenna, and information of being destroyed by external antenna is sent to Surveillance center's early warning.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the present invention's vehicle-mounted GNSS terminal called antenna decomposing prevention circuit;
Fig. 2 is the circuit theory diagrams of the present invention's vehicle-mounted GNSS terminal called antenna decomposing prevention circuit.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to shown in Fig. 1, Fig. 2, Fig. 1 is the theory diagram of the present invention's vehicle-mounted GNSS terminal called antenna decomposing prevention circuit; Fig. 2 is the circuit theory diagrams of the present invention's vehicle-mounted GNSS terminal called antenna decomposing prevention circuit.The present invention is to provide a kind of vehicle-mounted GNSS terminal called antenna decomposing prevention circuit, be mainly used in solving current vehicle-mounted GNSS terminal and often adopt external antenna, easily destroyed, and vehicle-mounted GNSS terminal cannot judge that terminal is in signal blind zone or antenna by artificial destruction after destroying, and after destroying cannot with the problem of the timely early warning of Surveillance center's communication.
Wherein the vehicle-mounted GNSS terminal of the present invention includes: MCU, wireless communication module, radio-frequency (RF) switch, built-in aerial and external antenna, described MCU is connected respectively with wireless communication module, radio-frequency (RF) switch, and described radio-frequency (RF) switch is connected with built-in communication antenna and external communication antenna respectively.
When the present invention normally uses, vehicle-mounted GNSS terminal acquiescence uses external antenna, by connecting wireless base station and Surveillance center's communication, wireless communication module Real-time Collection wireless network signal quality, for MCU compare of analysis, when the wireless signal that wireless communication module collects has ANOMALOUS VARIATIONS, MCU can attempt controlling radio-frequency (RF) switch and aerial signal is switched to built-in aerial, if the signal that built-in aerial gathers is also abnormal, MCU repeatedly can switch interior external antenna analysis comparison and be confirmed whether as wireless network is abnormal according to the Data Control radio-frequency (RF) switch gathered, as signal blind zone, get rid of antenna failure reason, if the signal being switched to built-in aerial collection is normal, then external antenna fault or destroyed is described, terminal sends external antenna abnormity early warning to Surveillance center, and terminal utilizes built-in aerial to work on.
As shown in Figure 2, vehicle-mounted GNSS terminal called antenna decomposing prevention circuit of the present invention, mainly includes: circuit is by passive devices such as wireless communication module, MCU, radio-frequency (RF) switch, built-in communication antenna, external communication antenna and capacitance-resistances; Adopt UART communication between MCU and wireless communication module, MCU by control signal K1, K2 control radio-frequency (RF) switch D1(SKY13270-92LF) switching.The radiofrequency signal (RF) of wireless communication module to be held with the COM of radio-frequency (RF) switch D1 by electric capacity C1 and is connected; The output control signal K1 of described MCU is held with the V1 of radio-frequency (RF) switch D1 by resistance R2 and is connected; The output control signal K2 of MCU is held with the V2 of radio-frequency (RF) switch D1 by resistance R1 and is connected; The IO1 of described radio-frequency (RF) switch D1 holds the electric capacity C2 by connecting, inductance L 1 is connected with built-in communication antenna ANT1, and one end of inductance L 1 is by electric capacity C5 ground connection, and the other end is by electric capacity C7 ground connection; The IO2 of described radio-frequency (RF) switch D1 holds the electric capacity C3 by connecting, inductance L 2 and antenna connector J1, J2 to be connected with external communication antenna ANT2, and one end of inductance L 2 is by electric capacity C4 ground connection, and the other end is by electric capacity C6 ground connection.
When external communication antenna normally uses, MCU is by control signal K1, the COM end that K2 controls radio-frequency (RF) switch SKY13270-92LF holds conducting with IO2, the radiofrequency signal (RF) of wireless communication module will by electric capacity C1 every being directly coupled to COM end, COM and IO2 conducting, IO2 is coupled to by C4 by electric capacity C3, L2, the π type filtering circuit of C6 composition, then by connector J1, J2 is connected to external antenna ANT2, wireless communication module gathers wireless network signal quality by external antenna ANT2 in real time, for MCU compare of analysis, when the wireless signal that wireless communication module collects has ANOMALOUS VARIATIONS, MCU can control radio-frequency (RF) switch SKY13270-92LF and aerial signal is switched to COM and IO1 conducting, the radiofrequency signal of wireless communication module will by electric capacity C1 every being directly coupled to COM end, due to COM and IO1 conducting, IO1 is coupled to by C5 by electric capacity C2, L1, the π type filtering circuit of C7 composition, be connected to built-in aerial ANT1, if the signal that built-in aerial gathers is also abnormal, whether MCU can switch interior external antenna ratio repeatedly to analysis confirmation according to the Data Control radio-frequency (RF) switch SKY13270-92LF gathered be that wireless network is abnormal, as signal blind zone, get rid of antenna failure reason, if the signal being switched to built-in aerial ANT1 collection is normal, then external antenna ANT2 fault or destroyed is described, terminal sends external antenna abnormity early warning to Surveillance center, and terminal utilizes built-in aerial to work on.
In sum, the present invention efficiently solves external communication antenna and easily destroys and split problem, and the external communication antenna of the present invention is destroyed or after removing, terminal can identify automatically, and enable emergency antenna by circuit of the present invention, and information of being destroyed by external antenna is sent to Surveillance center's early warning.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a vehicle-mounted GNSS terminal called antenna decomposing prevention circuit, is characterized in that, comprising: wireless communication module, MCU, radio-frequency (RF) switch D1, built-in communication antenna ANT1 and external communication antenna ANT2, adopt UART communication between described MCU and wireless communication module, the RF signal of described wireless communication module is held with the COM of radio-frequency (RF) switch D1 by electric capacity C1 and is connected, the output control signal K1 of described MCU is held with the V1 of radio-frequency (RF) switch D1 by resistance R2 and is connected, the output control signal K2 of MCU is held with the V2 of radio-frequency (RF) switch D1 by resistance R1 and is connected, the IO1 of described radio-frequency (RF) switch D1 holds the electric capacity C2 by connecting, inductance L 1 is connected with built-in communication antenna ANT1, and one end of inductance L 1 is by electric capacity C5 ground connection, and the other end is by electric capacity C7 ground connection, the IO2 of described radio-frequency (RF) switch D1 holds the electric capacity C3 by connecting, inductance L 2 and antenna connector J1, J2 to be connected with external communication antenna ANT2, and one end of inductance L 2 is by electric capacity C4 ground connection, and the other end is by electric capacity C6 ground connection, wherein when external communication antenna normally uses, MCU is by control signal K1, the COM end that K2 controls radio-frequency (RF) switch D1 holds conducting with IO2, the radiofrequency signal (RF) of wireless communication module is coupled to every being directly coupled to COM end, COM end and IO2 conducting, IO2 the π type filtering circuit be made up of C4, L2, C6 by by electric capacity C1 by electric capacity C3, then external communication antenna ANT2 is connected to by connector J1, J2, wireless communication module gathers wireless network signal quality, for MCU compare of analysis by external communication antenna ANT2 in real time, when the wireless signal that wireless communication module collects has ANOMALOUS VARIATIONS, MCU can pass through K1, K2 controls radio-frequency (RF) switch D1 by signal switching to COM and IO1 conducting, the radiofrequency signal (RF) of wireless communication module will by electric capacity C1 every being directly coupled to COM end, due to COM and IO1 conducting, IO1 is coupled to by C5 by electric capacity C2, L1, the π type filtering circuit of C7 composition, be connected to built-in communication antenna ANT1, if the signal that built-in aerial ANT1 gathers is also abnormal, MCU repeatedly can switch comparison according to the Data Control radio-frequency (RF) switch D1 gathered between built-in communication antenna ANT1 and external communication antenna ANT2, to be confirmed whether as wireless network is abnormal, if the signal being switched to built-in aerial ANT1 collection is normal, external antenna ANT2 fault or destroyed is then described, terminal sends external antenna abnormity early warning to Surveillance center, terminal utilizes built-in aerial ANT1 to work on.
2. vehicle-mounted GNSS terminal called antenna decomposing prevention circuit according to claim 1, it is characterized in that, described radio-frequency (RF) switch D1 is SKY13270-92LF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496255.7A CN104570007A (en) | 2013-10-22 | 2013-10-22 | Communication antenna anti-damage circuit of vehicle-mounted GNSS (global navigation satellite system) terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496255.7A CN104570007A (en) | 2013-10-22 | 2013-10-22 | Communication antenna anti-damage circuit of vehicle-mounted GNSS (global navigation satellite system) terminal |
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| Publication Number | Publication Date |
|---|---|
| CN104570007A true CN104570007A (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310496255.7A Pending CN104570007A (en) | 2013-10-22 | 2013-10-22 | Communication antenna anti-damage circuit of vehicle-mounted GNSS (global navigation satellite system) terminal |
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| CN (1) | CN104570007A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017895A (en) * | 2017-06-08 | 2017-08-04 | 柒星通信科技（北京）有限公司 | A kind of antenna clutch and include the mobile terminal of the antenna clutch |
| CN107105463A (en) * | 2017-03-28 | 2017-08-29 | 上海双微导航技术有限公司 | A kind of method of GNSS device automatic switchover networking medium |
| CN109308748A (en) * | 2018-08-01 | 2019-02-05 | 福建省汽车工业集团云度新能源汽车股份有限公司 | A kind of method and system saving car accident reason |
| CN113922833A (en) * | 2021-09-10 | 2022-01-11 | 青岛海信移动通信技术股份有限公司 | Terminal, radio frequency front end and antenna detection method |
| CN114285499A (en) * | 2021-11-29 | 2022-04-05 | 惠州市德赛西威汽车电子股份有限公司 | Detection system and detection method for vehicle-mounted TBOX external antenna |
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| CN101752677A (en) * | 2009-12-25 | 2010-06-23 | 深圳华为通信技术有限公司 | Antenna connecting circuit and relevant equipment and device |
| CN202889355U (en) * | 2012-10-16 | 2013-04-17 | 福建慧翰微电子有限公司 | Automatic antenna management circuit for vehicle-mounted remote monitoring terminal |
| CN203480028U (en) * | 2013-10-22 | 2014-03-12 | 深圳市伊爱高新技术开发有限公司 | Vehicular GNSS (Global Navigation Satellite System) terminal communication antenna anti-disassembly circuit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107105463A (en) * | 2017-03-28 | 2017-08-29 | 上海双微导航技术有限公司 | A kind of method of GNSS device automatic switchover networking medium |
| CN107017895A (en) * | 2017-06-08 | 2017-08-04 | 柒星通信科技（北京）有限公司 | A kind of antenna clutch and include the mobile terminal of the antenna clutch |
| CN109308748A (en) * | 2018-08-01 | 2019-02-05 | 福建省汽车工业集团云度新能源汽车股份有限公司 | A kind of method and system saving car accident reason |
| CN113922833A (en) * | 2021-09-10 | 2022-01-11 | 青岛海信移动通信技术股份有限公司 | Terminal, radio frequency front end and antenna detection method |
| CN114285499A (en) * | 2021-11-29 | 2022-04-05 | 惠州市德赛西威汽车电子股份有限公司 | Detection system and detection method for vehicle-mounted TBOX external antenna |
| CN114285499B (en) * | 2021-11-29 | 2024-04-02 | 惠州市德赛西威汽车电子股份有限公司 | Detection system and detection method of vehicle-mounted TBOX external antenna |
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Application publication date: 20150429 |