CN202309017U - Overcurrent protection system for GPS (Global Positioning System) active antenna - Google Patents
Overcurrent protection system for GPS (Global Positioning System) active antenna Download PDFInfo
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- CN202309017U CN202309017U CN2011204544533U CN201120454453U CN202309017U CN 202309017 U CN202309017 U CN 202309017U CN 2011204544533 U CN2011204544533 U CN 2011204544533U CN 201120454453 U CN201120454453 U CN 201120454453U CN 202309017 U CN202309017 U CN 202309017U
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Abstract
The utility model discloses an overcurrent protection system for a GPS (Global Positioning System) active antenna, which comprises a voltage sampling unit connected with a power supply VCC (Virtual Channel Connection); the voltage sampling unit is connected with the positive input end of a comparator; the negative input end of the comparator is connected with reference voltage Vref; the comparator is connected with an MCU (Microcontroller Unit); both the voltage sampling unit and the MCU are connected with a power supply switch-on/off control unit; the power supply switch-on/off control unit is connected with a radio-frequency choke and port protection unit; and the radio-frequency choke and port protection unit is connected with the antenna. The overcurrent protection system has the beneficial effects that the voltage sampling unit samples and transmits level values under two states, i.e. a circuit normal state and an overcurrent state to the comparator 3 for comparison and then transmits the compared level values to the MUC; then the MUC controls the power supply switch-on/off control unit to judge whether a power supply path is switched off or not; and the radio-frequency choking and port protection unit 5 is responsible for protecting the choking of a radio-frequency signal and a port.
Description
Technical field
The utility model relates to a kind of protection system of GPS active antenna, specifically is meant a kind of GPS active antenna Over Current Protection System.
Background technology
In GPS uses,, tend to adopt active antenna in order to improve the signal to noise ratio that receives signal.The antenna end long term exposure is in the external world, if can not in time find when being short-circuited, will cause damage to the power supply of equipment so, so in the application of GPS active antenna, tend to add the antenna short circuit measuring ability.All provide in existing a lot of GPS module and be the port of antenna feed; And can do the antenna end short-circuit detecting; But the feed of 3V can only be provided all; And the GPS active antenna is divided into two types of 3V and 5V feeds, if will use the active antenna of 5V feed, so then additional antennae short-circuit detecting and protective device must be arranged.Generally the overcurrent intelligence sample is obtained directly control on/off of back in traditional overcurrent protective device, by circuit control, the deadline is shorter, but also has a problem: when the load end capacitive reactances is bigger fully for this process; Open in a flash at mains switch, electric current is excessive, and electric capacity fails to be full of; The loop reaction time is fast again, and circuit is judged overcurrent, the switch of will cutting off the electricity supply; Put electricity when electric capacity, mains switch can be opened again, and circuit will be in this endless loop so.
The utility model content
The purpose of the utility model is to overcome above problem, and a kind of GPS active antenna Over Current Protection System is provided, and can support the overcurrent protection of 3V/5V active antenna.
The purpose of the utility model realizes through following technical proposals:
A kind of GPS active antenna Over Current Protection System; Comprise that the voltage sample unit, the voltage sample unit that are connected with power supply VCC are connected with the positive input of comparator; The negative input end of comparator inserts reference voltage V ref, and comparator is connected with the MCU control unit, and the voltage sample unit all is connected with the on/off control unit with the MCU control unit; On the on/off control unit, be connected with radio frequency chokes and port-guard unit, be connected with antenna on radio frequency chokes and the port-guard unit.Power supply VCC input voltage sampling unit; Inside, voltage sample unit is with sending into comparator 3 after the sampling of the magnitude of voltage after the resistance R 0; The voltage of sampling is compared judgement with the reference voltage V ref that inserts the comparator negative input end; Information after the judgement is sent into the MCU control unit; Make the break-make that corresponding response actions is controlled the on/off control unit by the MCU control unit, and radio frequency chokes and port-guard unit are the radio-frequency antennas that is connected to radio-frequency head, its effect is to prevent that radiofrequency signal from pouring into power supply and thunderbolt residual voltage and static are made corresponding protection.
Described voltage sample unit comprises the resistance R 0 that is connected with power supply VCC; Resistance R 0 is connected with resistance R 1, and the output of resistance R 0 is connected with the on/off control unit simultaneously, and the output of resistance R 1 is divided into two-way; One the tunnel is connected ground connection behind the other end series resistance R2 with the input of comparator.Say that further resistance R 0 resistance is less, but power capacity is bigger, when GPS active antenna operate as normal, the magnitude of voltage that A is ordered in the voltage sample unit is selected the value of divider resistance R1 and R2 near supply voltage VCC, exports rational high level voltage value and gives comparator; When short-circuit conditions appears in the GPS active antenna; The magnitude of voltage that A is ordered in the voltage sample unit is near 0V; The voltage sample unit sampling obtained low level and exported to comparator 3 and adjudicate this moment; MCU control this moment bipolar transistor Q1 is in off state, and field-effect transistor FET will be in off state, thereby reach the effect of protective circuit.
Said on/off control unit comprises field-effect transistor PET; The drain electrode of field-effect transistor PET is connected with the voltage sample unit; The grid of field-effect transistor PET is connected with the collector electrode of bipolar transistor Q1, and the source electrode of field-effect transistor PET is connected with radio frequency chokes and port-guard unit, and the base stage of bipolar transistor Q1 connects resistance R 4 and resistance R 5 simultaneously; Resistance R 4 is connected with the MCU control unit, and resistance R 5 is connected back ground connection with the emitter of bipolar transistor Q1.
The utility model compared with prior art has following advantage and beneficial effect:
A kind of GPS active antenna of 1 the utility model Over Current Protection System; Power supply VCC input voltage sampling unit; Inside, voltage sample unit is with sending into comparator 3 after the sampling of the magnitude of voltage after the resistance R 0; The voltage of sampling is compared judgement with the reference voltage V ref that inserts the comparator negative input end, and the information after the judgement is sent into the MCU control unit, makes the break-make that corresponding response actions is controlled the on/off control unit by the MCU control unit; Radio frequency chokes and port-guard unit are connected to the radio-frequency antenna of radio-frequency head, prevent that radiofrequency signal from pouring into power supply and thunderbolt residual voltage and static are made corresponding protection;
A kind of GPS active antenna of 2 the utility model Over Current Protection System; When short-circuit conditions appears in the GPS active antenna; The magnitude of voltage that A is ordered in the voltage sample unit is near 0V, and the voltage sample unit sampling obtained low level and exported to comparator 3 and adjudicate this moment, and MCU control this moment bipolar transistor Q1 is in off state; Field-effect transistor FET will be in off state, thereby reach the effect of protective circuit.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with embodiment the utility model is done further to specify, but the execution mode of the utility model is not limited thereto.
Embodiment
Like Fig. 1 institute; A kind of GPS active antenna of the utility model Over Current Protection System; Comprise that the voltage sample unit, the voltage sample unit that are connected with power supply VCC are connected with the positive input of comparator; The negative input end of comparator inserts reference voltage V ref, and comparator is connected with the MCU control unit, and the voltage sample unit all is connected with the on/off control unit with the MCU control unit; On the on/off control unit, be connected with radio frequency chokes and port-guard unit, be connected with antenna on radio frequency chokes and the port-guard unit; Wherein the voltage sample unit comprises the resistance R 0 that is connected with power supply VCC; Resistance R 0 is connected with resistance R 1, and the output of resistance R 0 is connected with the on/off control unit simultaneously, and the output of resistance R 1 is divided into two-way; One the tunnel is connected ground connection behind the other end series resistance R2 with the input of comparator; The on/off control unit comprises field-effect transistor PET; The drain electrode of field-effect transistor PET is connected with the voltage sample unit; The grid of field-effect transistor PET is connected with the collector electrode of bipolar transistor Q1, and the source electrode of field-effect transistor PET is connected with radio frequency chokes and port-guard unit, and the base stage of bipolar transistor Q1 connects resistance R 4 and resistance R 5 simultaneously; Resistance R 4 is connected with the MCU control unit, and resistance R 5 is connected back ground connection with the emitter of bipolar transistor Q1.
As stated, just can realize the utility model well.
Claims (3)
1. GPS active antenna Over Current Protection System; It is characterized in that: comprise that the voltage sample unit, the voltage sample unit that are connected with power supply VCC are connected with the positive input of comparator; The negative input end of comparator inserts reference voltage V ref; Comparator is connected with the MCU control unit; The voltage sample unit all is connected with the on/off control unit with the MCU control unit, on the on/off control unit, is connected with radio frequency chokes and port-guard unit, is connected with antenna on radio frequency chokes and the port-guard unit.
2. a kind of GPS active antenna Over Current Protection System according to claim 1; It is characterized in that: described voltage sample unit comprises the resistance R 0 that is connected with power supply VCC; Resistance R 0 is connected with resistance R 1, and the output of resistance R 0 is connected with the on/off control unit simultaneously, and the output of resistance R 1 is divided into two-way; One the tunnel is connected ground connection behind the other end series resistance R2 with the input of comparator.
3. a kind of GPS active antenna Over Current Protection System according to claim 1; It is characterized in that: said on/off control unit comprises field-effect transistor PET; The drain electrode of field-effect transistor PET is connected with the voltage sample unit; The grid of field-effect transistor PET is connected with the collector electrode of bipolar transistor Q1, and the source electrode of field-effect transistor PET is connected with radio frequency chokes and port-guard unit, and the base stage of bipolar transistor Q1 connects resistance R 4 and resistance R 5 simultaneously; Resistance R 4 is connected with the MCU control unit, and resistance R 5 is connected back ground connection with the emitter of bipolar transistor Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204544533U CN202309017U (en) | 2011-11-16 | 2011-11-16 | Overcurrent protection system for GPS (Global Positioning System) active antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204544533U CN202309017U (en) | 2011-11-16 | 2011-11-16 | Overcurrent protection system for GPS (Global Positioning System) active antenna |
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| Publication Number | Publication Date |
|---|---|
| CN202309017U true CN202309017U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204544533U Expired - Fee Related CN202309017U (en) | 2011-11-16 | 2011-11-16 | Overcurrent protection system for GPS (Global Positioning System) active antenna |
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| CN (1) | CN202309017U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485635A (en) * | 2014-12-30 | 2015-04-01 | 青岛歌尔声学科技有限公司 | Overcurrent protection circuit and overcurrent protection device |
| WO2016037335A1 (en) * | 2014-09-11 | 2016-03-17 | Abb Technology Ltd | Protective circuit |
| CN105866611A (en) * | 2016-04-28 | 2016-08-17 | 乐视控股（北京）有限公司 | Antenna plugging state detection device |
| CN106099838A (en) * | 2016-07-25 | 2016-11-09 | 贝兹维仪器(苏州)有限公司 | Connector for logging while drilling protection device based on sampling resistor |
| CN106374422A (en) * | 2016-08-24 | 2017-02-01 | 云顶科技（江苏）有限公司 | Active antenna-based detection protection circuit |
| CN106711928A (en) * | 2017-01-16 | 2017-05-24 | 努比亚技术有限公司 | Short-circuit protection device, as well as short-circuit protection method and short-circuit protection circuit thereof |
| CN106899002A (en) * | 2015-12-18 | 2017-06-27 | 上海贝尔股份有限公司 | A kind of method and apparatus for being used to prevent antenna traces short circuit in RRU |
| CN111064161A (en) * | 2019-12-31 | 2020-04-24 | 苏州浪潮智能科技有限公司 | System for enhancing EFT interference resistance of server |
-
2011
- 2011-11-16 CN CN2011204544533U patent/CN202309017U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016037335A1 (en) * | 2014-09-11 | 2016-03-17 | Abb Technology Ltd | Protective circuit |
| CN106104951A (en) * | 2014-09-11 | 2016-11-09 | Abb瑞士股份有限公司 | Protection circuit |
| EP3192140A4 (en) * | 2014-09-11 | 2018-06-06 | ABB Schweiz AG | Protective circuit |
| CN106104951B (en) * | 2014-09-11 | 2018-08-07 | Abb瑞士股份有限公司 | Protect circuit |
| US10256805B2 (en) | 2014-09-11 | 2019-04-09 | Abb Schweiz Ag | Protective circuit with current regulating digital output module |
| CN104485635A (en) * | 2014-12-30 | 2015-04-01 | 青岛歌尔声学科技有限公司 | Overcurrent protection circuit and overcurrent protection device |
| CN106899002A (en) * | 2015-12-18 | 2017-06-27 | 上海贝尔股份有限公司 | A kind of method and apparatus for being used to prevent antenna traces short circuit in RRU |
| CN105866611A (en) * | 2016-04-28 | 2016-08-17 | 乐视控股（北京）有限公司 | Antenna plugging state detection device |
| CN106099838A (en) * | 2016-07-25 | 2016-11-09 | 贝兹维仪器(苏州)有限公司 | Connector for logging while drilling protection device based on sampling resistor |
| CN106374422A (en) * | 2016-08-24 | 2017-02-01 | 云顶科技（江苏）有限公司 | Active antenna-based detection protection circuit |
| CN106711928A (en) * | 2017-01-16 | 2017-05-24 | 努比亚技术有限公司 | Short-circuit protection device, as well as short-circuit protection method and short-circuit protection circuit thereof |
| CN111064161A (en) * | 2019-12-31 | 2020-04-24 | 苏州浪潮智能科技有限公司 | System for enhancing EFT interference resistance of server |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20131116 |