CN201489075U - GPS active antenna on-off detection device - Google Patents
GPS active antenna on-off detection device Download PDFInfo
- Publication number
- CN201489075U CN201489075U CN2009201692216U CN200920169221U CN201489075U CN 201489075 U CN201489075 U CN 201489075U CN 2009201692216 U CN2009201692216 U CN 2009201692216U CN 200920169221 U CN200920169221 U CN 200920169221U CN 201489075 U CN201489075 U CN 201489075U
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- gps
- active antenna
- detection circuit
- antenna
- resistor
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Abstract
The utility model discloses a GPS (Global Positioning System) active antenna on-off detection device which is characterized in that the device comprises a GPS active antenna, a detection circuit, an external detection circuit and a GPS receiver, wherein the detection circuit is connected in series between the GPS active antenna and the GPS receiver, and the output terminal of the detection circuit is connected with the external detection circuit; the detection circuit comprises a capacitor, an inductor, a resistor and two triodes; base electrodes of the triodes are connected with each other, collectors thereof are connected with a 3.3V power supply voltage via the serial resistor, and emitters thereof are grounded through the serial resistor; and the GPS active antenna is connected with the collector of one triode, of which the emitter is connected with the external detection circuit. The device uses simple triodes and a resistor to form the detection circuit achieving the opening of the GPS antenna through detecting the electric current of the GPS antenna, and has the advantages of simple circuit, low cost, small occupied PCB (printed circuit board) space, convenient detection, low influence over the GPS antenna performance, and the like.
Description
Technical field
The utility model relates to communication technique field, is specifically related to a kind of pick-up unit of break-make of the GPS of detection active antenna.
Background technology
The method of the general GPS of detection active antenna is: use current detecting IC chip that the electric current of antenna is detected.This design cost is higher, and might the performance of antenna be affected.In order to address the above problem, the utility model provides a kind of new solution.
The utility model content
Technical problem to be solved in the utility model is: how a kind of GPS active antenna switching detection device is provided, this GPS active antenna switching detection device uses simple triode and resistance to constitute one and realizes testing circuit to the gps antenna open circuit by the detection to the gps antenna electric current, have circuit simple, with low cost, take the PCB space less, easy to detect, to advantages such as the gps antenna performance impact are very little.
For achieving the above object, the technical scheme that the utility model adopted is: a kind of GPS active antenna switching detection device is provided, it is characterized in that: comprise GPS active antenna, testing circuit, outer detecting circuit and GPS receiver; Described testing circuit is serially connected between GPS active antenna and the GPS receiver, and its output terminal is connected with outer detecting circuit.
According to GPS active antenna switching detection device provided by the utility model, it is characterized in that: described testing circuit comprises capacitor, inductor, resistor and two triodes; The base stage of described two triodes is connected, and collector all is connected with the supply voltage of 3.3V through the resistor of serial connection, and emitter is through the equal ground connection of resistor of serial connection; Described GPS active antenna is connected with the collector of a described triode, and the emitter of triode is connected with outer detecting circuit.
In sum, GPS active antenna switching detection device provided by the utility model can very conveniently be embedded into the break-make that is used for accurately detecting the GPS active antenna in the external product of gps antenna, also have simultaneously detect that rate of false alarm is low, circuit is simple, with low cost, take the PCB space less, easy to detect, to advantages such as the gps antenna performance impact are very little.
Description of drawings
Fig. 1 is the schematic diagram of GPS active antenna switching detection device;
Fig. 2 is the testing circuit figure of GPS active antenna switching detection device.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
As shown in Figure 1, this GPS active antenna switching detection device comprises GPS active antenna, testing circuit, outer detecting circuit and GPS receiver; Described testing circuit is serially connected between GPS active antenna and the GPS receiver, and its output terminal is connected with outer detecting circuit.Described testing circuit comprises capacitor, inductor, resistor and two triodes; The base stage of described two triodes is connected, and collector all is connected with the supply voltage of 3.3V through the resistor of serial connection, and emitter is through the equal ground connection of resistor of serial connection; Described GPS active antenna is connected with the collector of a described triode, and the emitter of triode is connected with outer detecting circuit.
This device is realized the open circuit of GPS active antenna is detected by add testing circuit between GPS active antenna and GPS receiver; After gps antenna inserts, will have electric current through testing circuit, testing circuit amplifies electric current, exports high-low level more after treatment to outer detecting circuit, for other Equipment Inspections.
As shown in Figure 2, GPSVCC is the 3.3V supply voltage, resistor R 87, triode Q6, resistor R 88 these roads provide a reference voltage, promptly at the base voltage of Q5 about 2.6V.When not inserting antenna, inductor L5, there is not electric current to flow through, the current ratio that flows through resistor R 85 this moment is less, the pressure drop of resistor R 85 is about 0.1V, then the about 3.3V of emitter-base bandgap grading place voltage of triode Q5 can make triode Q5 conducting, and then the magnitude of voltage at the output terminal CHECKOUT place of testing circuit is about 3.2V.Detecting through outer detecting circuit is high level.When the antenna access, the 10Ma electric current of will having an appointment, the pressure drop of resistor R 85 increases to about 0.1V, and the emitter of triode Q5 and base stage pressure reduction are too small, and triode Q5 ends.At this moment, the magnitude of voltage at the output terminal CHECKOUT place of testing circuit is about 0V.Outer detecting circuit detects and is low level.Outer detecting circuit can use GPIO that CHECKOUT place voltage is detected.When having antenna to insert, output low level; When not having antenna to insert, the output high level.
This device can accurately detect the open circuit of GPS active antenna, and circuit is simple, and is with low cost, very convenient being embedded in the product, for the external product of gps antenna, can detecting antenna easily and illegally be cut off.Use the situation of antenna detection wrong report and damage antenna can not occur in the GPS terminal, use through the test of reality, and is very little to the influence of GPS received signal.
But; the above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (2)
1. a GPS active antenna switching detection device is characterized in that: comprise GPS active antenna, testing circuit, outer detecting circuit and GPS receiver; Described testing circuit is serially connected between GPS active antenna and the GPS receiver, and its output terminal is connected with outer detecting circuit.
2. GPS active antenna switching detection device according to claim 1 is characterized in that: described testing circuit comprises capacitor, inductor, resistor and two triodes; The base stage of described two triodes is connected, and collector all is connected with the supply voltage of 3.3V through the resistor of serial connection, and emitter is through the equal ground connection of resistor of serial connection; Described GPS active antenna is connected with the collector of a described triode, and the emitter of triode is connected with outer detecting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201692216U CN201489075U (en) | 2009-08-19 | 2009-08-19 | GPS active antenna on-off detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201692216U CN201489075U (en) | 2009-08-19 | 2009-08-19 | GPS active antenna on-off detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201489075U true CN201489075U (en) | 2010-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201692216U Expired - Fee Related CN201489075U (en) | 2009-08-19 | 2009-08-19 | GPS active antenna on-off detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201489075U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445590A (en) * | 2011-12-21 | 2012-05-09 | 上海博泰悦臻电子设备制造有限公司 | Current detection circuit used for judging state of an antenna |
| CN102967793A (en) * | 2012-11-23 | 2013-03-13 | 深圳市航盛电子股份有限公司 | Open-circuit short-circuit detection circuit of car-mounted terminal antenna |
| CN104614735A (en) * | 2013-11-01 | 2015-05-13 | 厦门雅迅网络股份有限公司 | GPS detection method and GPS detection circuit for vehicles |
| CN104768237A (en) * | 2015-04-22 | 2015-07-08 | 重庆长安汽车股份有限公司 | Device and method for enabling vehicle-mounted terminal to be compatible with active and passive antennas |
| CN105137260A (en) * | 2015-08-19 | 2015-12-09 | 深圳市中兴物联科技有限公司 | Circuit for detecting the state of active antenna |
| CN105866547A (en) * | 2015-01-23 | 2016-08-17 | 神讯电脑(昆山)有限公司 | Active antenna tester |
| WO2017078642A1 (en) | 2015-11-03 | 2017-05-11 | Ford Otomotiv Sanayi A.S. | A gps active antenna system which can detect failure |
| CN107991542A (en) * | 2017-11-30 | 2018-05-04 | 华南理工大学 | A kind of active antenna detection device and its detection method |
| CN108226690A (en) * | 2016-12-21 | 2018-06-29 | 国家无线电监测中心检测中心 | Detection circuit |
| WO2020148668A1 (en) | 2019-01-15 | 2020-07-23 | Tubitak | Test device for gps |
| CN112505583A (en) * | 2020-11-24 | 2021-03-16 | 深圳市广联智通科技有限公司 | Circuit and method for detecting state of active GPS antenna |
-
2009
- 2009-08-19 CN CN2009201692216U patent/CN201489075U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445590A (en) * | 2011-12-21 | 2012-05-09 | 上海博泰悦臻电子设备制造有限公司 | Current detection circuit used for judging state of an antenna |
| CN102967793A (en) * | 2012-11-23 | 2013-03-13 | 深圳市航盛电子股份有限公司 | Open-circuit short-circuit detection circuit of car-mounted terminal antenna |
| CN104614735A (en) * | 2013-11-01 | 2015-05-13 | 厦门雅迅网络股份有限公司 | GPS detection method and GPS detection circuit for vehicles |
| CN105866547A (en) * | 2015-01-23 | 2016-08-17 | 神讯电脑(昆山)有限公司 | Active antenna tester |
| CN105866547B (en) * | 2015-01-23 | 2019-04-19 | 神讯电脑(昆山)有限公司 | Active antenna test device |
| CN104768237B (en) * | 2015-04-22 | 2018-08-14 | 重庆长安汽车股份有限公司 | Car-mounted terminal is compatible with active and passive antenna device and method |
| CN104768237A (en) * | 2015-04-22 | 2015-07-08 | 重庆长安汽车股份有限公司 | Device and method for enabling vehicle-mounted terminal to be compatible with active and passive antennas |
| CN105137260A (en) * | 2015-08-19 | 2015-12-09 | 深圳市中兴物联科技有限公司 | Circuit for detecting the state of active antenna |
| CN105137260B (en) * | 2015-08-19 | 2019-01-22 | 深圳市中兴物联科技有限公司 | A kind of active antenna state detection circuit |
| WO2017078642A1 (en) | 2015-11-03 | 2017-05-11 | Ford Otomotiv Sanayi A.S. | A gps active antenna system which can detect failure |
| CN108226690A (en) * | 2016-12-21 | 2018-06-29 | 国家无线电监测中心检测中心 | Detection circuit |
| CN107991542A (en) * | 2017-11-30 | 2018-05-04 | 华南理工大学 | A kind of active antenna detection device and its detection method |
| WO2020148668A1 (en) | 2019-01-15 | 2020-07-23 | Tubitak | Test device for gps |
| CN112505583A (en) * | 2020-11-24 | 2021-03-16 | 深圳市广联智通科技有限公司 | Circuit and method for detecting state of active GPS antenna |
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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: 20100526 Termination date: 20120819 |