WO2017078642A1 - A gps active antenna system which can detect failure - Google Patents

A gps active antenna system which can detect failure Download PDF

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Publication number
WO2017078642A1
WO2017078642A1 PCT/TR2016/050419 TR2016050419W WO2017078642A1 WO 2017078642 A1 WO2017078642 A1 WO 2017078642A1 TR 2016050419 W TR2016050419 W TR 2016050419W WO 2017078642 A1 WO2017078642 A1 WO 2017078642A1
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WO
WIPO (PCT)
Prior art keywords
gps module
control signal
duty cycle
antenna
control unit
Prior art date
Application number
PCT/TR2016/050419
Other languages
French (fr)
Inventor
Can ISIL
Original Assignee
Ford Otomotiv Sanayi A.S.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ford Otomotiv Sanayi A.S. filed Critical Ford Otomotiv Sanayi A.S.
Publication of WO2017078642A1 publication Critical patent/WO2017078642A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/10—Radiation diagrams of antennas
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing

Definitions

  • the present invention relates to an antenna system which enables to perform trouble shooting of the GPS module thereon and the active antenna by utilizing the duty cycle enabling to run switch mode power supply (SMPS).
  • SMPS switch mode power supply
  • the current on the feed line going to the antenna is measured in the system with active antenna, and the power drawn by the antenna is calculated, thereby controlling the functionality of the antenna.
  • the physical presence and/or short circuit- open circuit control of the antenna can be performed by measuring the impedance of the antenna. Additional electronic components required for open circuit voltage measurements such as measuring the said current or impedance of the antenna increases the cost of the system. In addition to cost, since the added components cause electromagnetic noise or various compatibility problems, it may require important design changes in the system.
  • Cicle201489075 an application known in the state of the art, discloses a method wherein the antenna functionality is controlled by measuring current at the feeder output performed through the GPS module of the active antenna. Using the additional components required for current measurement through the feeder output increases the cost of the system. There is a difference between the said patent document and the invention of the present application in terms of the measurement of the power consumed by the GPS module. In the invention of the present application, the antenna function is detected through the power management of the GPS module.
  • Japanese Patent Document no JP2010139391 an application known in the state of the art, discloses a method wherein the gain difference between the signal level detected from the antenna and the active amplifier for detecting the function of the antenna. There is a difference between the said patent document and the invention of the present application in terms of detecting antenna function through the power management of the GPS module.
  • Chinese Patent document no CN102967793 an application known in the state of the art, discloses a method wherein open circuit voltage control is suggested for controlling the function of the active antenna when the antenna is energized. In the said patent document, it is detected whether the antenna functions with the power consumption of the module. In the invention of the present application, the antenna function is detected through the power management of the GPS module.
  • the objective of the present invention is to provide an antenna system which can detect failure of the antenna without requiring to measure open circuit voltage.
  • Another objective of the present invention is to provide an antenna system which can control the operating status of the antenna without requiring additional electronic component.
  • a further objective of the present invention is to provide an antenna system which can detect physical presence and operating status of the antenna even when the antenna gain is low.
  • Yet another objective of the present invention is to provide an antenna system which enables to detect the operating status of the GPS module and the active antenna by signifying the duty cycle enabling to run a switch mode power supply (SMPS).
  • SMPS switch mode power supply
  • Figure 1 is the schematic view of an antenna system.
  • An antenna system (1) which can detect the physical presence and operating status of the antenna even when the antenna gain is low and which is preferably used in motor vehicles, comprises
  • At least one GPS module (3) which enables to detect momentary position by calculating the distance between the satellite or satellites and itself, at least one active antenna (4) which receives the global positioning message signals coming from the satellite or the satellites and transfers to the GPS module (3).
  • At least one control unit (5) which generates a control signal enabling to run the switch mode power supply (2), and changes the duty cycle of the control signal in order to adjust voltage by receiving a feedback upon measuring the output voltage of the switch mode power supply (2).
  • SMPS switch mode power supply
  • the switch mode power supply (2) supplies power to the system.
  • the switch mode power supply (2) preferably has a voltage regulator.
  • the control unit (5) generates the control signal required for running the switch mode power supply (2) (generating the voltage required for the system by realizing the suitable switching).
  • the control signal is generated by making pulse width modulation (PWM).
  • the control unit (5) receives a feedback (FB) by measuring the output voltage of the switch mode power supply (2).
  • the control unit (5) is adapted to change the duty cycle of the control signal in order to realize voltage regulation.
  • the control unit (5) is adapted to run the switch mode power supply (2) with the control signal having suitable duty cycle. Therefore, the voltage required by the antenna system (1) can be supplied from the output of the switch mode power supply (2) independent from the load amount in the antenna system (1).
  • the GPS module (3) in the antenna system (1) is a global positioning system module.
  • GPS module (3) determines the momentary location of the antenna system (1) by calculating the distance between the satellites and itself.
  • the active antenna (4) receives the global positioning signals coming from the satellite or the satellites and transfers to the GPS module (3).
  • the duty cycle value (Dl) of the control signal generated by the control unit (5) is measured before and determined.
  • the duty cycle value (D2) of the control signal generated by the control unit (5) is measured before and determined.
  • the duty cycle value (D3) of the control signal generated by the control unit (5) is measured before and determined.
  • the value of the control signal generated by the control unit (5) changes according to the output voltage generated by the switch mode power supply (2). While (Dl), (D2) and (D3) values are determined, the output voltage generated by the switch mode power supply (2) and the control signal values generated by the control unit (5) for this are compared.
  • duty cycle value of the control signal generated by the control unit (5) is equal to the previously measured duty cycle value (Dl) of the control signal generated by the control unit (5) when the GPS module (3) in the antenna system (1) is deactivated, it is detected that the GPS module (3) does not consume power, therefore it cannot function properly and it is faulty.
  • the duty cycle value of the control signal generated by the control unit (5) is equal to the previously measured duty cycle value (D2) of the control signal generated by the control unit (5) when the GPS module (3) in the antenna system (1) is active but the active antenna (4) is not connected to the GPS module (3), it is detected that the GPS module (3) functions properly, however the active antenna (4) does not consume power and therefore it cannot function properly and it is faulty. If the duty cycle value of the control signal generated by the control unit (5) is equal to the previously measured duty cycle value (D3) of the control signal generated by the control unit (5) when the GPS module (3) in the antenna system (1) is active and the active antenna (4) is connected to the GPS module (3), it is detected that the GPS module (3) does not consume power, therefore it cannot function properly and it is faulty.
  • the circuit breaker (6) can be an electronically controlled mechanic switch, for example a relay, or a switch with active semi- conductive electronic component, for example transistor, IGBT, or it can be a vacuum tube.
  • the circuit breaker (6) is not limited to the given examples.
  • the said (Dl), (D2), and (D3) values are measured by cutting the energy going to the GPS module (3) and/or active antenna (4) connected to the GPS module (3).
  • the control unit (5) gives command that the circuit breaker (6) cuts the energy going to the active antenna (4) connected to the GPS module (3). Then, the duty cycle value (D2) of the control signal generated by the control unit (5) is compared with the duty cycle value (D3) of the control signal, before the energy going to the said active antenna (4) is cut, by the control unit (5). If the values are equal, it is detected that the active antenna (4) does not consume power, therefore it cannot function properly and it is defective. If the values are different, it is detected that the active antenna (4) consumes power, therefore it functions properly and it is not defective. The control unit (5) gives command that the circuit breaker (6) only cuts the energy going to the GPS module (3).
  • the duty cycle value (Dl) of the control signal generated by the control unit (5) is compared with the duty cycle value (D3) of the control signal, before the energy going to the said GPS module (3) is cut, by the control unit (5). If the values are equal, it is detected that the GPS module (3) does not consume power, therefore it cannot function properly and it is defective. If the values are different, it is detected that the GPS module (3) consumes power, therefore it functions properly and it is not defective.
  • the control unit (5) is adapted to give command that the circuit breaker (6) cuts the energy going to the active antenna (4) connected to the GPS module (3) in case of an error.
  • the control unit (5) is adapted to compare the duty cycle value (D2) of the control signal it generated with the duty cycle value (D3) of the control signal, before cutting the energy going to the said active antenna (4), and to detect that the active antenna (4) is defective if the said values are equal.
  • the control unit (5) is adapted to give command that the circuit breaker (6) only cuts the energy going to the GPS module (3), then to compare the duty cycle value (Dl) of the control signal generated by the control unit (5) with the duty cycle value (D3) of the control signal before cutting the energy going to the said GPS module (3), and detect that the GPS module (3) is defective if the said values are equal.
  • the control unit (5) is adapted to compare the duty cycle value of the control signal with the previously measured duty cycle (Dl) of the control signal generated by the control unit (5) when the GPS module (3) is deactivated, and detect that the GPS module (3) is faulty when the said values are equal.
  • the control unit (5) is adapted to compare the duty cycle value of the control signal with the previously measured duty cycle value (D2) of the control signal generated when the GPS module (3) is activated, however when the active antenna (4) is not connected to the GPS module (3), and detect that the GPS module (3) operates properly, but the active antenna (4) is faulty when the said values are equal.
  • the control unit (5) if an error is detected in the GPS module (3) or in the active antenna (4), the control unit (5) generates a written or visual warning signal.

Abstract

The present invention relates to an antenna system (1) wherein a switch mode power supply (2) is used, and which can detect failure of the GPS module (3) and/or the active antenna (4) present thereon by comparing the duty cycles enabling to run the switch mode power supply (2) by a control unit (5).

Description

A GPS ACTIVE ANTENNA SYSTEM WHICH CAN DETECT FAILURE
DESCRIPTION
Field of the Invention
The present invention relates to an antenna system which enables to perform trouble shooting of the GPS module thereon and the active antenna by utilizing the duty cycle enabling to run switch mode power supply (SMPS).
Background of the Invention
Upon the proliferation of consumer electronic and the use of smart devices, the field of use for devices, which performs data and power transfer via electromagnetic waves such as communication systems and satellite positioning, has also increased. Such technologies have been stated to be used commonly in automotive, transportation and other air, land, sea vehicles, toys, military applications, agricultural devices and tools etc., as well as consumer electronics. Detection of the systems transferring data and power operate without failure has various importance depending on the place of use, purpose, design and function of the systems. In several industrial applications, observing the system function and troubleshooting has crucial importance. In the state of the art, in systems wherein the electromagnetic waves are used, the raw signal at the output of the receiver circuit is directly interpreted for controlling whether the antennas that can be used by transmitter or the receiver functions properly. In case there is no meaningful signal, it is understood that whole system does not function properly or the signal level is in sufficient. However, in this case, it cannot be detected whether the antenna itself is the source of the problem. In a method known in the state of the art, the current on the feed line going to the antenna is measured in the system with active antenna, and the power drawn by the antenna is calculated, thereby controlling the functionality of the antenna. In another method, the physical presence and/or short circuit- open circuit control of the antenna can be performed by measuring the impedance of the antenna. Additional electronic components required for open circuit voltage measurements such as measuring the said current or impedance of the antenna increases the cost of the system. In addition to cost, since the added components cause electromagnetic noise or various compatibility problems, it may require important design changes in the system.
Chinese Patent Document no CN201489075, an application known in the state of the art, discloses a method wherein the antenna functionality is controlled by measuring current at the feeder output performed through the GPS module of the active antenna. Using the additional components required for current measurement through the feeder output increases the cost of the system. There is a difference between the said patent document and the invention of the present application in terms of the measurement of the power consumed by the GPS module. In the invention of the present application, the antenna function is detected through the power management of the GPS module.
Japanese Patent Document no JP2010139391, an application known in the state of the art, discloses a method wherein the gain difference between the signal level detected from the antenna and the active amplifier for detecting the function of the antenna. There is a difference between the said patent document and the invention of the present application in terms of detecting antenna function through the power management of the GPS module. Chinese Patent document no CN102967793, an application known in the state of the art, discloses a method wherein open circuit voltage control is suggested for controlling the function of the active antenna when the antenna is energized. In the said patent document, it is detected whether the antenna functions with the power consumption of the module. In the invention of the present application, the antenna function is detected through the power management of the GPS module.
In current applications, generally open circuit voltage measurement is performed, and the power drawn by the antenna is measured, and it is detected in this way whether the antenna functions. In current applications, there is no application for detecting the function of the antenna through the power management of the GPS module.
The Objective of the Invention
The objective of the present invention is to provide an antenna system which can detect failure of the antenna without requiring to measure open circuit voltage.
Another objective of the present invention is to provide an antenna system which can control the operating status of the antenna without requiring additional electronic component.
A further objective of the present invention is to provide an antenna system which can detect physical presence and operating status of the antenna even when the antenna gain is low. Summary of the Invention
Yet another objective of the present invention is to provide an antenna system which enables to detect the operating status of the GPS module and the active antenna by signifying the duty cycle enabling to run a switch mode power supply (SMPS). Detailed Description of the Invention
An antenna system developed to fulfill the objective of the present invention is illustrated in the accompanying figure, in which:
Figure 1 is the schematic view of an antenna system.
The components shown in the figures are each given reference numbers as follows:
1. Antenna system
2. Switch mode power supply
3. GPS module
4. Active antenna
5. Control unit
6. Circuit breaker
An antenna system (1), which can detect the physical presence and operating status of the antenna even when the antenna gain is low and which is preferably used in motor vehicles, comprises
at least one switch mode power supply (2),
at least one GPS module (3) which enables to detect momentary position by calculating the distance between the satellite or satellites and itself, at least one active antenna (4) which receives the global positioning message signals coming from the satellite or the satellites and transfers to the GPS module (3).
at least one control unit (5) which generates a control signal enabling to run the switch mode power supply (2), and changes the duty cycle of the control signal in order to adjust voltage by receiving a feedback upon measuring the output voltage of the switch mode power supply (2). In an antenna system (1) in an embodiment of the invention, there is at least one switch mode power supply (2) (SMPS), at least one GPS module (3), at least one active antenna (4), and at least one control unit (5). The switch mode power supply (2) supplies power to the system. The switch mode power supply (2) preferably has a voltage regulator. The control unit (5) generates the control signal required for running the switch mode power supply (2) (generating the voltage required for the system by realizing the suitable switching). In a preferred embodiment of the invention, the control signal is generated by making pulse width modulation (PWM). The control unit (5) receives a feedback (FB) by measuring the output voltage of the switch mode power supply (2). The control unit (5) is adapted to change the duty cycle of the control signal in order to realize voltage regulation. The control unit (5) is adapted to run the switch mode power supply (2) with the control signal having suitable duty cycle. Therefore, the voltage required by the antenna system (1) can be supplied from the output of the switch mode power supply (2) independent from the load amount in the antenna system (1).
The GPS module (3) in the antenna system (1) is a global positioning system module. GPS module (3) determines the momentary location of the antenna system (1) by calculating the distance between the satellites and itself. The active antenna (4) receives the global positioning signals coming from the satellite or the satellites and transfers to the GPS module (3). When the GPS module (3) in the antenna system (1) is deactivated, in other words when energy is not given to the GPS module (3), the duty cycle value (Dl) of the control signal generated by the control unit (5) is measured before and determined. When the GPS module (3) in the antenna system (1) is active, in other words when energy is given to the GPS module (3), but the active antenna (4) is not connected to the GPS module (3), the duty cycle value (D2) of the control signal generated by the control unit (5) is measured before and determined.
When the GPS module (3) in the antenna system (1) is active and the active antenna (4) is connected to the GPS module (3), the duty cycle value (D3) of the control signal generated by the control unit (5) is measured before and determined.
It compares the duty cycle value of the control signal generated by the control unit (5) while the antenna system (1) is operating with the previously measured (Dl), (D2) and (D3) values. The value of the control signal generated by the control unit (5) changes according to the output voltage generated by the switch mode power supply (2). While (Dl), (D2) and (D3) values are determined, the output voltage generated by the switch mode power supply (2) and the control signal values generated by the control unit (5) for this are compared.
If the duty cycle value of the control signal generated by the control unit (5) is equal to the previously measured duty cycle value (Dl) of the control signal generated by the control unit (5) when the GPS module (3) in the antenna system (1) is deactivated, it is detected that the GPS module (3) does not consume power, therefore it cannot function properly and it is faulty.
If the duty cycle value of the control signal generated by the control unit (5) is equal to the previously measured duty cycle value (D2) of the control signal generated by the control unit (5) when the GPS module (3) in the antenna system (1) is active but the active antenna (4) is not connected to the GPS module (3), it is detected that the GPS module (3) functions properly, however the active antenna (4) does not consume power and therefore it cannot function properly and it is faulty. If the duty cycle value of the control signal generated by the control unit (5) is equal to the previously measured duty cycle value (D3) of the control signal generated by the control unit (5) when the GPS module (3) in the antenna system (1) is active and the active antenna (4) is connected to the GPS module (3), it is detected that the GPS module (3) does not consume power, therefore it cannot function properly and it is faulty.
In another embodiment of the invention, there is at least one circuit breaker (6) which can cut the energy going to the GPS module (3) and/or to the active antenna (4) connected to the GPS module (3), and which is a switch that can be controlled by the control unit (5). The circuit breaker (6) can be an electronically controlled mechanic switch, for example a relay, or a switch with active semi- conductive electronic component, for example transistor, IGBT, or it can be a vacuum tube. The circuit breaker (6) is not limited to the given examples. In one embodiment of the invention, instead of measuring the (Dl), (D2), and (D3) values before, the said (Dl), (D2), and (D3) values are measured by cutting the energy going to the GPS module (3) and/or active antenna (4) connected to the GPS module (3). The control unit (5) gives command that the circuit breaker (6) cuts the energy going to the active antenna (4) connected to the GPS module (3). Then, the duty cycle value (D2) of the control signal generated by the control unit (5) is compared with the duty cycle value (D3) of the control signal, before the energy going to the said active antenna (4) is cut, by the control unit (5). If the values are equal, it is detected that the active antenna (4) does not consume power, therefore it cannot function properly and it is defective. If the values are different, it is detected that the active antenna (4) consumes power, therefore it functions properly and it is not defective. The control unit (5) gives command that the circuit breaker (6) only cuts the energy going to the GPS module (3). Then, the duty cycle value (Dl) of the control signal generated by the control unit (5) is compared with the duty cycle value (D3) of the control signal, before the energy going to the said GPS module (3) is cut, by the control unit (5). If the values are equal, it is detected that the GPS module (3) does not consume power, therefore it cannot function properly and it is defective. If the values are different, it is detected that the GPS module (3) consumes power, therefore it functions properly and it is not defective.
The control unit (5) is adapted to give command that the circuit breaker (6) cuts the energy going to the active antenna (4) connected to the GPS module (3) in case of an error. The control unit (5) is adapted to compare the duty cycle value (D2) of the control signal it generated with the duty cycle value (D3) of the control signal, before cutting the energy going to the said active antenna (4), and to detect that the active antenna (4) is defective if the said values are equal. The control unit (5) is adapted to give command that the circuit breaker (6) only cuts the energy going to the GPS module (3), then to compare the duty cycle value (Dl) of the control signal generated by the control unit (5) with the duty cycle value (D3) of the control signal before cutting the energy going to the said GPS module (3), and detect that the GPS module (3) is defective if the said values are equal.
The control unit (5) is adapted to compare the duty cycle value of the control signal with the previously measured duty cycle (Dl) of the control signal generated by the control unit (5) when the GPS module (3) is deactivated, and detect that the GPS module (3) is faulty when the said values are equal.
The control unit (5) is adapted to compare the duty cycle value of the control signal with the previously measured duty cycle value (D2) of the control signal generated when the GPS module (3) is activated, however when the active antenna (4) is not connected to the GPS module (3), and detect that the GPS module (3) operates properly, but the active antenna (4) is faulty when the said values are equal.
As a result of the comparison realized in the embodiments of the invention, if an error is detected in the GPS module (3) or in the active antenna (4), the control unit (5) generates a written or visual warning signal.

Claims

An antenna system (1), which is used in motor vehicles and which can detect failure in a GPS module (3) and/or an active antenna (4), essentially comprising
at least one switch mode power supply (2),
at least one GPS module (3) which enables to detect momentary position by calculating the distance between the satellite or satellites and itself,
at least one active antenna (4) which receives the global positioning message signals coming from the satellite or the satellites and transfers to the GPS module (3), and characterized by
at least one circuit breaker (6) which can break the energy going to the GPS module (3) and/or to the active antenna connected to the GPS module (3),
at least one control unit (5) which is adapted to give command so that the circuit breaker (6) cuts the energy going to the active antenna (4) connected to the GPS module (3), compare the duty cycle value (D2) of the control signal generated by itself with the duty cycle value (D3) of the previous control signal before cutting the energy going to the said active antenna (4), detect that the active antenna (4) is faulty if the said values are equal.
An antenna system (1) according to claim 1, characterized by control unit (5) which is adapted to give command so that the circuit breaker (6) only cuts the energy going to the GPS module (3), compare the duty cycle value (Dl) of the control signal generated by itself with the duty cycle value (D3) of the previous control signal before cutting the energy going to the said GPS module (3), detect that the GPS module (3) is faulty if the said values are equal. An antenna system (1) according to claim 1, characterized by circuit breaker (6) which can be an electronically controlled mechanic switch or a switch with active semi-conductive electronic components, or a vacuum tube.
An antenna system (1) according to claim 1, characterized by at least one control unit (5) which generates a control signal enabling to run the switch mode power supply (2), and changes the duty cycle of the control signal in order to adjust voltage by receiving a feedback upon measuring the output voltage of the switch mode power supply (2).
An antenna system (1), which can detect failure in a GPS module (3) and/or an active antenna (4), essentially comprising
at least one switch mode power supply (2),
at least one control unit (5) which generates a control signal enabling to run the switch mode power supply (2), and changes the duty cycle of the control signal in order to adjust voltage by receiving a feedback upon measuring the output voltage of the switch mode power supply
(2) ,
at least one GPS module (3) which enables to detect momentary position by calculating the distance between the satellite or satellites and itself,
at least one active antenna (4) which receives the global positioning message signals coming from the satellite or the satellites and transfers to the GPS module (3), and characterized by
control unit (5) which is adapted to compare the duty cycle value of the control signal with the previously measured duty cycle (Dl) of the control signal generated by the control unit (5) when the GPS module
(3) is offline, and detect that the GPS module (3) is faulty when the said values are equal. An antenna system (1) according to claim 5, characterized by control unit (5) which is adapted to compare the duty cycle value of the control signal with the previously measured duty cycle value (D2) of the control signal generated when the GPS module (3) is activated, however when the active antenna (4) is not connected to the GPS module (3), and detect that the GPS module (3) operates properly, but the active antenna (4) is faulty when the said values are equal.
An antenna system (1) according to claim 1 or 5, characterized by control unit which generates a written or visual warning signal if an error is detected in the active antenna (4).
An antenna system (2) according to any of the claim 2 or 5, characterized by control unit which generates a written or visual warning signal if an error is detected in the GPS module (3).
PCT/TR2016/050419 2015-11-03 2016-11-02 A gps active antenna system which can detect failure WO2017078642A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2015/13699A TR201513699A2 (en) 2015-11-03 2015-11-03 A GPS-ACTIVE ANTENNA SYSTEM WITH FAULT DETECTION
TR2015/13699 2015-11-03

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