JP2016131314A - Radio communication system - Google Patents

Radio communication system Download PDF

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Publication number
JP2016131314A
JP2016131314A JP2015004924A JP2015004924A JP2016131314A JP 2016131314 A JP2016131314 A JP 2016131314A JP 2015004924 A JP2015004924 A JP 2015004924A JP 2015004924 A JP2015004924 A JP 2015004924A JP 2016131314 A JP2016131314 A JP 2016131314A
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antenna
voltage
connection state
ground
communication system
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JP2015004924A
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Japanese (ja)
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壮平 丹羽
Sohei Niwa
壮平 丹羽
雄一 平山
Yuichi Hirayama
雄一 平山
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Toyota Industries Corp
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Toyota Industries Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a radio communication system that can diagnose the connection state of a ground type antenna.SOLUTION: A radio communication system 100 has a ground type antenna 1 in which a signal line 5 is connected to the ground in a DC style, a DC power source Vo connected to some point of the signal line 5 through resistors R1, R2, a voltage detection circuit 6 for detecting the voltage between the connection point C of the resistors R1, R2 and the ground, and a diagnosing circuit 7 for diagnosing the connection state of the antenna 1 based on the voltage detected by the voltage detection circuit 6. The diagnosing circuit 7 determines that the connection state of the antenna 1 is normal when the voltage detected by the voltage detection circuit 6 is equal to a value obtained by dividing the output voltage of the DC power source Vo by the resistors R1 and R2, and determines that the connection state of the antenna 1 is abnormal when the voltage detected by the voltage detection circuit 6 is equal to the output voltage of the DC power source Vo.SELECTED DRAWING: Figure 1

Description

この発明は、無線通信システムに係り、特に接地型のアンテナを備えた無線通信システムに関する。   The present invention relates to a wireless communication system, and more particularly to a wireless communication system including a grounded antenna.

現在、車載機器をはじめとして様々な分野で無線通信システムが用いられている。無線通信システムの構成の一例として、アンテナと無線通信機とをケーブルで接続する構成がある。このようなシステムにおいては、アンテナがケーブルに接続されていない、或いは無線信号が流れる信号ラインに断線が存在する等の理由により、アンテナの接続状態に異常が発生し、通信が行えなくなるおそれがある。   Currently, wireless communication systems are used in various fields including in-vehicle devices. As an example of the configuration of the wireless communication system, there is a configuration in which an antenna and a wireless communication device are connected by a cable. In such a system, the antenna may not be connected to the cable, or there may be an abnormality in the connection state of the antenna due to a disconnection in the signal line through which the radio signal flows, and communication may not be performed. .

特許文献1には、アンテナの接続状態を診断可能な無線通信システムが記載されている。このシステムでは、無線信号が流れる信号ラインの途中に第1の抵抗R1を介して直流電源を接続すると共に、信号ラインとグランドとの間に第2の抵抗R2を接続し、信号ラインの直流成分の電圧を電圧検出回路によって検出することによって、アンテナの接続状態を診断する。   Patent Document 1 describes a wireless communication system capable of diagnosing an antenna connection state. In this system, a DC power source is connected to the middle of a signal line through which a radio signal flows through a first resistor R1, and a second resistor R2 is connected between the signal line and the ground so that a DC component of the signal line is obtained. Is detected by a voltage detection circuit, thereby diagnosing the connection state of the antenna.

特開2010−103598号公報JP 2010-103598 A

しかしながら、特許文献1に記載の無線通信システムでは、信号ラインとグランドとの間に抵抗を接続する必要があるため、ループアンテナや逆F型アンテナ等の信号ラインがグランドに直流的に接続される「接地型」のアンテナの接続状態を診断することはできない。   However, in the wireless communication system described in Patent Document 1, since it is necessary to connect a resistor between the signal line and the ground, a signal line such as a loop antenna or an inverted F-type antenna is connected to the ground in a DC manner. It is not possible to diagnose the connection status of a “grounded” antenna.

この発明はこのような問題を解決するためになされたものであり、接地型のアンテナの接続状態を診断することができる無線通信システムを提供することを目的とする。   The present invention has been made to solve such a problem, and an object thereof is to provide a radio communication system capable of diagnosing the connection state of a grounded antenna.

上記の課題を解決するために、この発明に係る無線通信システムは、信号ラインがグランドに直流的に接続される接地型のアンテナと、信号ラインの途中に第1、第2のインピーダンス素子を介して接続される電源と、第1、第2のインピーダンス素子の接続点とグランドとの間の電圧を検出する電圧検出手段と、電圧検出手段によって検出される電圧に基いてアンテナの接続状態を診断する診断手段とを備える。   In order to solve the above-described problems, a wireless communication system according to the present invention includes a grounded antenna in which a signal line is connected to a ground in a DC manner, and first and second impedance elements in the middle of the signal line. Connected to the power supply, voltage detection means for detecting the voltage between the connection point of the first and second impedance elements and the ground, and diagnosis of the connection state of the antenna based on the voltage detected by the voltage detection means Diagnostic means.

この発明に係る無線通信システムによれば、接地型のアンテナの接続状態を診断することができる。   According to the wireless communication system of the present invention, the connection state of the grounded antenna can be diagnosed.

この発明の実施の形態に係る無線通信システムの構成を示す図である。It is a figure which shows the structure of the radio | wireless communications system which concerns on embodiment of this invention.

以下、この発明の実施の形態について添付図面に基づいて説明する。
実施の形態.
この発明の実施の形態に係る無線通信システム100の構成を図1に示す。無線通信システム100は、アンテナ1と、無線通信機2と、アンテナ1と無線通信機2とを接続する同軸ケーブル3とから構成されている。
Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment.
FIG. 1 shows the configuration of radio communication system 100 according to the embodiment of the present invention. The wireless communication system 100 includes an antenna 1, a wireless communication device 2, and a coaxial cable 3 that connects the antenna 1 and the wireless communication device 2.

アンテナ1は、ループアンテナや逆F型アンテナ等の接地型アンテナであり、無線信号が流れる信号ラインがグランドに直流的に接続されている。具体的には、アンテナ1のエレメント1aは同軸ケーブル3の芯線3aおよび網線3bに共に接続されており、同軸ケーブル3の芯線3aは無線通信機2の送受信回路4に接続され、同軸ケーブル3の網線3bはグランドに接続されている。無線通信機2の送受信回路4は無線信号の送受信を行う回路であり、アンテナ1と送受信回路4とを結ぶ信号ライン5は、グランドに直流的に接続されている。   The antenna 1 is a grounded antenna such as a loop antenna or an inverted F antenna, and a signal line through which a radio signal flows is connected to the ground in a DC manner. Specifically, the element 1 a of the antenna 1 is connected to both the core wire 3 a and the network wire 3 b of the coaxial cable 3, and the core wire 3 a of the coaxial cable 3 is connected to the transmission / reception circuit 4 of the wireless communication device 2. The net line 3b is connected to the ground. The transmission / reception circuit 4 of the wireless communication device 2 is a circuit for transmitting / receiving a radio signal, and a signal line 5 connecting the antenna 1 and the transmission / reception circuit 4 is connected to the ground in a direct current manner.

無線通信機2において、アンテナ1と送受信回路4とを結ぶ信号ライン5の途中には、インピーダンス素子としての抵抗R1、R2を介して直流電源Voが接続されている。電圧検出回路6は、抵抗R1、R2の接続点Cとグランドとの間の電圧を検出する。診断回路7は、電圧検出回路6によって検出される接続点Cの電圧に基いて、アンテナ1の接続状態を診断する。なお、インピーダンス素子としての抵抗R1、R2の値は任意でよいが、抵抗R2の値については、信号ライン5を流れる無線信号(高周波信号)が直流電源Voの方向に流れ込まないことを保証できる値に設定することが好ましい。また、抵抗R2に替えて、高周波信号を遮断可能なインダクタンスを有するコイルを用いてもよい。   In the wireless communication device 2, a DC power supply Vo is connected to a signal line 5 connecting the antenna 1 and the transmission / reception circuit 4 via resistors R1 and R2 as impedance elements. The voltage detection circuit 6 detects the voltage between the connection point C of the resistors R1 and R2 and the ground. The diagnosis circuit 7 diagnoses the connection state of the antenna 1 based on the voltage at the connection point C detected by the voltage detection circuit 6. Note that the values of the resistors R1 and R2 as impedance elements may be arbitrary, but the value of the resistor R2 can guarantee that a radio signal (high frequency signal) flowing through the signal line 5 does not flow in the direction of the DC power supply Vo. It is preferable to set to. Further, instead of the resistor R2, a coil having an inductance capable of interrupting a high frequency signal may be used.

アンテナ1の接続状態が正常である場合、すなわちアンテナ1が同軸ケーブル3に接続されており、かつアンテナ1と送受信回路4とを結ぶ信号ライン5に断線が存在しない場合には、直流電源Voから抵抗R1、R2、同軸ケーブル3の芯線3a、アンテナ1、そして同軸ケーブル3の網線3bを経由してグランドに直流電流が流れる。そのため、抵抗R1、R2の接続点Cには、直流電源Voの出力電圧を抵抗R1とR2で分圧した電圧がかかり、この分圧された電圧が電圧検出回路6によって検出される。   When the connection state of the antenna 1 is normal, that is, when the antenna 1 is connected to the coaxial cable 3 and there is no disconnection in the signal line 5 connecting the antenna 1 and the transmission / reception circuit 4, the DC power supply Vo A direct current flows to the ground via the resistors R1 and R2, the core wire 3a of the coaxial cable 3, the antenna 1, and the mesh wire 3b of the coaxial cable 3. Therefore, a voltage obtained by dividing the output voltage of the DC power supply Vo by the resistors R1 and R2 is applied to the connection point C of the resistors R1 and R2, and the divided voltage is detected by the voltage detection circuit 6.

一方、アンテナ1の接続状態が異常である場合、すなわちアンテナ1が同軸ケーブル3に接続されていないか、或いはアンテナ1と送受信回路4とを結ぶ信号ライン5に断線が存在する場合には、直流電源Voからグランドに至る上記の経路が切断される。そのため、接続点Cの電圧は直流電源Voの出力電圧に等しくなり、この電圧が電圧検出回路6によって検出される。   On the other hand, when the connection state of the antenna 1 is abnormal, that is, when the antenna 1 is not connected to the coaxial cable 3 or the signal line 5 connecting the antenna 1 and the transmission / reception circuit 4 is disconnected, the direct current The above path from the power supply Vo to the ground is disconnected. Therefore, the voltage at the connection point C becomes equal to the output voltage of the DC power supply Vo, and this voltage is detected by the voltage detection circuit 6.

診断回路7は、電圧検出回路6によって検出される接続点Cの電圧が直流電源Voの出力電圧を抵抗R1とR2で分圧した値である場合には、アンテナ1の接続状態が正常であると判定し、電圧検出回路6によって検出される電圧が直流電源Voの出力電圧に等しい場合には、アンテナ1の接続状態が異常であると判定する。   The diagnosis circuit 7 indicates that the connection state of the antenna 1 is normal when the voltage at the connection point C detected by the voltage detection circuit 6 is a value obtained by dividing the output voltage of the DC power supply Vo by the resistors R1 and R2. If the voltage detected by the voltage detection circuit 6 is equal to the output voltage of the DC power supply Vo, it is determined that the connection state of the antenna 1 is abnormal.

以上説明したように、この実施の形態に係る無線通信システム100は、接地型のアンテナ1と、信号ライン5の途中に抵抗R1、R2を介して接続される直流電源Voと、抵抗R1、R2の接続点Cとグランドとの間の電圧を検出する電圧検出回路6と、電圧検出回路6によって検出される電圧に基いてアンテナ1の接続状態を診断する診断回路7とを備えている。診断回路7は、電圧検出回路6によって検出される電圧が直流電源Voの出力電圧を抵抗R1とR2で分圧した値である場合には、アンテナ1の接続状態が正常であると判定し、電圧検出回路6によって検出される電圧が直流電源Voの出力電圧に等しい場合には、アンテナ1の接続状態が異常であると判定する。これにより、接地型のアンテナ1の接続状態を診断することができる。   As described above, the radio communication system 100 according to this embodiment includes the grounded antenna 1, the DC power supply Vo connected to the signal line 5 through the resistors R1 and R2, and the resistors R1 and R2. A voltage detection circuit 6 for detecting a voltage between the connection point C and the ground, and a diagnosis circuit 7 for diagnosing the connection state of the antenna 1 based on the voltage detected by the voltage detection circuit 6. The diagnosis circuit 7 determines that the connection state of the antenna 1 is normal when the voltage detected by the voltage detection circuit 6 is a value obtained by dividing the output voltage of the DC power supply Vo by the resistors R1 and R2. When the voltage detected by the voltage detection circuit 6 is equal to the output voltage of the DC power supply Vo, it is determined that the connection state of the antenna 1 is abnormal. Thereby, the connection state of the grounded antenna 1 can be diagnosed.

100 無線通信システム、1 アンテナ、5 信号ライン、6 電圧検出回路(電圧検出手段)、7 診断回路(診断手段)、C 接続点、R1 抵抗(第1のインピーダンス素子)、R2 抵抗(第2のインピーダンス素子)、Vo 直流電源(電源)。   100 wireless communication system, 1 antenna, 5 signal lines, 6 voltage detection circuit (voltage detection means), 7 diagnostic circuit (diagnosis means), C connection point, R1 resistance (first impedance element), R2 resistance (second Impedance element), Vo DC power supply (power supply).

Claims (1)

信号ラインがグランドに直流的に接続される接地型のアンテナと、
前記信号ラインの途中に第1、第2のインピーダンス素子を介して接続される電源と、
前記第1、第2のインピーダンス素子の接続点とグランドとの間の電圧を検出する電圧検出手段と、
前記電圧検出手段によって検出される電圧に基いて前記アンテナの接続状態を診断する診断手段と
を備える、無線通信システム。
A grounded antenna in which the signal line is connected to the ground in a DC manner;
A power source connected through the first and second impedance elements in the middle of the signal line;
Voltage detecting means for detecting a voltage between a connection point of the first and second impedance elements and a ground;
A radio communication system comprising: a diagnosis unit that diagnoses a connection state of the antenna based on a voltage detected by the voltage detection unit.
JP2015004924A 2015-01-14 2015-01-14 Radio communication system Pending JP2016131314A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022167800A (en) * 2021-04-22 2022-11-04 ヒルシュマン カー コミュニケーション ゲゼルシャフト ミット ベシュレンクテル ハフツング Method for determining connection state between antenna amplifier and antenna structure, diagnosis module and antenna amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022167800A (en) * 2021-04-22 2022-11-04 ヒルシュマン カー コミュニケーション ゲゼルシャフト ミット ベシュレンクテル ハフツング Method for determining connection state between antenna amplifier and antenna structure, diagnosis module and antenna amplifier
JP7348345B2 (en) 2021-04-22 2023-09-20 ヒルシュマン カー コミュニケーション ゲゼルシャフト ミット ベシュレンクテル ハフツング Method for determining connection status between antenna amplifier and antenna structure, diagnostic module and antenna amplifier
US11988725B2 (en) 2021-04-22 2024-05-21 Hirschmann Car Communication Gmbh Method for determining a connection status between an antenna amplifier and an antenna structure, a diagnostic module and an antenna amplifier

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