CN202889355U - Automatic antenna management circuit for vehicle-mounted remote monitoring terminal - Google Patents
Automatic antenna management circuit for vehicle-mounted remote monitoring terminal Download PDFInfo
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- CN202889355U CN202889355U CN2012205284985U CN201220528498U CN202889355U CN 202889355 U CN202889355 U CN 202889355U CN 2012205284985 U CN2012205284985 U CN 2012205284985U CN 201220528498 U CN201220528498 U CN 201220528498U CN 202889355 U CN202889355 U CN 202889355U
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- antenna
- mounted remote
- central controller
- management circuit
- vehicle
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Abstract
The utility model relates to an automatic antenna management circuit for a vehicle-mounted remote monitoring terminal (TBOX). The automatic antenna management circuit comprises a central controller of the vehicle-mounted remote monitoring terminal, and an internal antenna and an external antenna of the vehicle-mounted remote monitoring terminal. The automatic antenna management circuit is characterized by also comprising a first interface circuit for connecting the internal antenna; a second interface circuit for connecting the external circuit, wherein the working state of the second interface circuit is monitored by the central controller; and a radio-frequency switch, which is controlled by the central controller to switch between the internal antenna and the external antenna. The automatic antenna management circuit of the utility model realizes automatic double-antenna management for the vehicle-mounted terminal. When the external antenna falls off or fails, the system automatically switches to the internal antenna, thereby guaranteeing normal operation of the remote monitoring terminal.
Description
Technical field
The utility model relates to a kind of automatic management circuit of antenna of mounted remote monitor terminal.
Background technology
Car-mounted terminal is the headend equipment of vehicle monitoring management system, generally is installed in reconditely in the various vehicles, along with the intellectuality of car-mounted terminal, guarantees that the user carries out the intelligent important embodiment that Long-distance Control is car-mounted terminal to car-mounted terminal.But vehicle-mounted Long-distance Control generally is to depend on controlled in wireless; in order to guarantee the stability of wireless telecommunications, existing car-mounted terminal all is provided with for the antenna that receives signal, but automobile easily jolts in the process of moving; often can cause antenna to come off or fault, cause remote monitoring to be lost efficacy.Therefore, the antenna that how to improve car-mounted terminal is problem demanding prompt solution.
Summary of the invention
The purpose of this utility model provides a kind of automatic management circuit of antenna of mounted remote monitor terminal, can realize that the car-mounted terminal double antenna manages automatically.
The utility model adopts following scheme to realize: the automatic management circuit of a kind of antenna of mounted remote monitor terminal, comprise the central controller of mounted remote monitor terminal and built-in aerial and the external antenna of this mounted remote monitor terminal, it is characterized in that, also comprise:
One first interface circuit is used for connecting described built-in aerial;
One second interface circuit is used for connecting described external antenna, and described central controller is monitored the operating state of this second interface circuit; And
One radio-frequency (RF) switch, this radio-frequency (RF) switch of described central controller controls is to the switching of described built-in aerial and external antenna.
In the utility model one embodiment, the feedback point of described external antenna has certain over the ground D.C. resistance, and described the second interface circuit is provided with pull-up resistor; Described central controller is monitored the level of this pull-up resistor incoming end.
In the utility model one embodiment, the model of described radio-frequency (RF) switch is PE4259DS.
The utility model guarantees the stability of mounted remote system communication by double antenna, and can come off or automatically identification switching during fault at external antenna.Thoroughly solved the problem of existing car-mounted terminal telecommunication poor stability, circuit structure is simple, has preferably practical value.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the utility model embodiment.
Fig. 2 is the physical circuit connection diagram of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.
As shown in Figure 1, the present embodiment provides the automatic management circuit of antenna of a kind of mounted remote monitor terminal (TBOX), comprise the central controller 1 of mounted remote monitor terminal and built-in aerial 5 and the external antenna 6 of this mounted remote monitor terminal, it is characterized in that, also comprise: a first interface circuit 3 is used for connecting described built-in aerial 5; One second interface circuit 4 is used for connecting described external antenna 6, the operating state of described central controller 1 this second interface circuit 4 of monitoring; And a radio-frequency (RF) switch 2, the switching of 2 pairs of described built-in aerials 5 of this radio-frequency (RF) switch of described central controller controls and external antenna 6.
Concrete, please refer to Fig. 2, Fig. 2 is the physical circuit connection diagram of the utility model embodiment, and among the figure, central controller does not draw, and this central controller provides the RF_CTR signal, the switching of control radio-frequency (RF) switch PE4259DS.In the present embodiment, be provided with a drop-down resistance on the end points of the terminated line of described external antenna, described the second interface circuit is provided with pull-up resistor R13; Described central controller is monitored the level of this pull-up resistor R13 incoming end.When external antenna connected, the level that central controller is read the external antenna interface was low level; When external antenna came off, the level that central controller is read the external antenna interface was high level.Like this, judge external antenna situation and then control radio-frequency (RF) switch PE4259DS switched antenna by the level state that reads the external antenna interface.
The above only is preferred embodiment of the present utility model, and all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (3)
1. the automatic management circuit of the antenna of a mounted remote monitor terminal comprises the central controller of mounted remote monitor terminal and built-in aerial and the external antenna of this mounted remote monitor terminal, it is characterized in that, also comprises:
One first interface circuit is used for connecting described built-in aerial;
One second interface circuit is used for connecting described external antenna, and described central controller is monitored the operating state of this second interface circuit; And
One radio-frequency (RF) switch, this radio-frequency (RF) switch of described central controller controls is to the switching of described built-in aerial and external antenna.
2. the automatic management circuit of the antenna of mounted remote monitor terminal according to claim 1, it is characterized in that: be provided with a drop-down resistance on the end points of the terminated line of described external antenna, described the second interface circuit is provided with pull-up resistor; Described central controller is monitored the level of this pull-up resistor incoming end.
3. the automatic management circuit of the antenna of mounted remote monitor terminal according to claim 1, it is characterized in that: the model of described radio-frequency (RF) switch is PE4259DS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205284985U CN202889355U (en) | 2012-10-16 | 2012-10-16 | Automatic antenna management circuit for vehicle-mounted remote monitoring terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205284985U CN202889355U (en) | 2012-10-16 | 2012-10-16 | Automatic antenna management circuit for vehicle-mounted remote monitoring terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202889355U true CN202889355U (en) | 2013-04-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205284985U Expired - Lifetime CN202889355U (en) | 2012-10-16 | 2012-10-16 | Automatic antenna management circuit for vehicle-mounted remote monitoring terminal |
Country Status (1)
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| CN (1) | CN202889355U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570007A (en) * | 2013-10-22 | 2015-04-29 | 深圳市伊爱高新技术开发有限公司 | Communication antenna anti-damage circuit of vehicle-mounted GNSS (global navigation satellite system) terminal |
| CN105871406A (en) * | 2015-12-02 | 2016-08-17 | 乐视致新电子科技（天津）有限公司 | Wireless router and working method thereof |
| CN107402330A (en) * | 2017-09-08 | 2017-11-28 | 慧翰微电子股份有限公司 | TBOX external antennas measure loop and detection method |
| CN108287271A (en) * | 2017-01-10 | 2018-07-17 | 中兴通讯股份有限公司 | A kind of external antenna detection method, equipment and device |
| WO2020019781A1 (en) * | 2018-07-25 | 2020-01-30 | 中兴通讯股份有限公司 | Vehicle-mounted antitheft method and apparatus, device, and storage medium |
| WO2021104005A1 (en) * | 2019-11-26 | 2021-06-03 | 华为技术有限公司 | Electronic device |
-
2012
- 2012-10-16 CN CN2012205284985U patent/CN202889355U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570007A (en) * | 2013-10-22 | 2015-04-29 | 深圳市伊爱高新技术开发有限公司 | Communication antenna anti-damage circuit of vehicle-mounted GNSS (global navigation satellite system) terminal |
| CN105871406A (en) * | 2015-12-02 | 2016-08-17 | 乐视致新电子科技（天津）有限公司 | Wireless router and working method thereof |
| CN108287271A (en) * | 2017-01-10 | 2018-07-17 | 中兴通讯股份有限公司 | A kind of external antenna detection method, equipment and device |
| WO2018130003A1 (en) * | 2017-01-10 | 2018-07-19 | 中兴通讯股份有限公司 | Method and apparatus for detecting external antenna, and device |
| CN107402330A (en) * | 2017-09-08 | 2017-11-28 | 慧翰微电子股份有限公司 | TBOX external antennas measure loop and detection method |
| WO2020019781A1 (en) * | 2018-07-25 | 2020-01-30 | 中兴通讯股份有限公司 | Vehicle-mounted antitheft method and apparatus, device, and storage medium |
| WO2021104005A1 (en) * | 2019-11-26 | 2021-06-03 | 华为技术有限公司 | Electronic device |
| CN112952361A (en) * | 2019-11-26 | 2021-06-11 | 华为技术有限公司 | Electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Riverside East Road in Fuzhou city of Fujian province 350015 No. 116 building 7 layer gateway Patentee after: FLAIRCOMM MICROELECTRONICS, Inc. Address before: Riverside East Road in Fuzhou city of Fujian province 350015 No. 116 building 7 layer gateway Patentee before: FUJIAN HUIHAN MICROELECTRONIC Co.,Ltd. Address after: Riverside East Road in Fuzhou city of Fujian province 350015 No. 116 building 7 layer gateway Patentee after: FUJIAN HUIHAN MICROELECTRONIC Co.,Ltd. Address before: Riverside East Road in Fuzhou city of Fujian province 350015 No. 116 building 7 layer gateway Patentee before: Fujian Flaircomm Microelectronics Inc. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |