JP2009094771A

JP2009094771A - Receiver and communication system for vehicle using the same

Info

Publication number: JP2009094771A
Application number: JP2007263088A
Authority: JP
Inventors: Mitsuhiro Baino; 光広倍野
Original assignee: Panasonic Corp
Current assignee: Panasonic Corp
Priority date: 2007-10-09
Filing date: 2007-10-09
Publication date: 2009-04-30

Abstract

PROBLEM TO BE SOLVED: To provide a receiver and a communication system for a vehicle using the same, mainly for use for locking/unlocking, opening/closing, etc. of doors of the vehicle, which are free from erroneous operations and can be surely and easily operated. SOLUTION: A reception sensitivity switching means comprising a switch 11 and fixed resistors 13A and 13B is provided and is switched in accordance with a plurality of electric wave signals received by a control means 12, so that a slide door 30B and a trunk door 20C can be operated only in positions close to them while the front door 20A can be remotely operated from a relatively remote position. Accordingly, erroneous operations such as erroneous depression are hard to occur and complicated operations such as a depressing operation time changing operation are unnecessary, thereby the receiver and the communication system for the vehicle which can be surely and easily operated can be obtained. COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、主に自動車に装着され、ドアの施解錠や開閉等の遠隔操作に使用される受信装置、及びこれを用いた車両用通信システムに関するものである。 The present invention relates to a receiving apparatus that is mainly mounted on an automobile and used for remote operation such as locking / unlocking and opening / closing of a door, and a vehicle communication system using the receiving apparatus.

近年、車両のドアの施解錠や開閉等を、機械式キーにより直接操作することに加え、運転者が携帯した送信装置によって、離れた箇所から遠隔操作することが一般に行われており、送信装置からの電波信号を受信する受信装置においても、誤操作がなく確実な操作が可能なものが求められている。 In recent years, in addition to directly operating the locking / unlocking and opening / closing of vehicle doors with mechanical keys, it is generally performed remotely from a remote location by a transmission device carried by a driver. There is also a demand for a receiving device that receives a radio signal from a device that can be reliably operated without erroneous operation.

このような従来の受信装置及びこれを用いた車両用通信システムについて、図６〜図９を用いて説明する。 Such a conventional receiving apparatus and a vehicle communication system using the receiving apparatus will be described with reference to FIGS.

図７は従来の受信装置のブロック回路図であり、同図において、１はアンテナ、２はＩＣ等の復調手段で、アンテナ１がコイルやコンデンサを介して復調手段２に接続されている。 FIG. 7 is a block circuit diagram of a conventional receiver. In FIG. 7, reference numeral 1 denotes an antenna, 2 denotes demodulation means such as an IC, and the antenna 1 is connected to the demodulation means 2 via a coil or a capacitor.

また、この復調手段２に抵抗３が接続されると共に、マイコン等の制御手段４が復調手段２に電気的に接続されて、受信装置５が構成されている。 In addition, a resistor 3 is connected to the demodulating means 2 and a control means 4 such as a microcomputer is electrically connected to the demodulating means 2 to constitute a receiving device 5.

そして、このような受信装置５が、図６の車両用通信システムの側面図に示すように、側面にフロントドア２０Ａやスライドドア２０Ｂ、背面にトランクドア２０Ｃが各々設けられた自動車２０の前方に装着されると共に、コネクタやリード線（図示せず）等によって車両の電子回路やバッテリ（図示せず）に電気的に接続される。 Then, as shown in the side view of the vehicle communication system in FIG. 6, such a receiving device 5 is disposed in front of the automobile 20 provided with a front door 20A and a slide door 20B on the side surface and a trunk door 20C on the back surface. It is mounted and electrically connected to a vehicle electronic circuit and a battery (not shown) by a connector, a lead wire (not shown) or the like.

さらに、この自動車２０には、モータやソレノイド（図示せず）等によって、フロントドア２０Ａには施錠装置２１Ａ、スライドドア２０Ｂには電動装置２１Ｂ、トランクドア２０Ｃには開扉装置２１Ｃの複数の駆動装置２１が形成されると共に、これらの駆動装置２１が受信装置５の制御手段４に電気的に接続されている。 Further, the motor vehicle 20 is driven by a motor, a solenoid (not shown) or the like, and the front door 20A has a locking device 21A, the sliding door 20B has an electric device 21B, and the trunk door 20C has a plurality of door opening devices 21C. A device 21 is formed and these drive devices 21 are electrically connected to the control means 4 of the receiving device 5.

また、２５は送信装置で、絶縁樹脂製のケース２６上面には、押釦等の複数の操作部２７Ａや２７Ｂ、２７Ｃが設けられると共に、ケース２６内には、これらの操作部２７Ａや２７Ｂ、２７Ｃの操作に応じて、電気的接離を行う複数のスイッチ接点（図示せず）や、この操作に応じて電波信号を送信する送信手段（図示せず）等が形成されている。 Reference numeral 25 denotes a transmission device. A plurality of operation units 27A, 27B, and 27C such as push buttons are provided on the upper surface of the insulating resin case 26, and the operation units 27A, 27B, and 27C are provided in the case 26. In response to this operation, a plurality of switch contacts (not shown) for electrical contact and separation, a transmission means (not shown) for transmitting a radio signal in response to this operation, and the like are formed.

そして、このような自動車２０に装着された受信装置５と、運転者が機械式キーと共に携帯する送信装置２５によって、車両用通信システムが構成されている。 And the communication apparatus for vehicles is comprised by the receiver 5 with which such the motor vehicle 20 was mounted | worn, and the transmitter 25 which a driver | carrier carries with a mechanical key.

以上の構成において、送信装置２５を持った運転者が自動車２０からある程度離れた場所で、例えば、フロントドア２０Ａの解錠を行うために、操作部２７Ａを押圧操作すると、送信装置２５から、図８（ａ）の波形図に示すような、フロントドア２０Ａ解錠用の固有の識別コードや駆動コードが、電波信号Ａ１として押圧操作している間、繰返し送信される。 In the above configuration, when the driver having the transmission device 25 presses the operation unit 27A in order to unlock the front door 20A, for example, at a location some distance from the automobile 20, the transmission device 25 A unique identification code or drive code for unlocking the front door 20A as shown in the waveform diagram of FIG. 8A is repeatedly transmitted as a radio signal A1.

そして、この電波信号Ａ１を受信装置５のアンテナ１が受信し、復調手段２から制御手段４に、図８（ｂ）に示すような、受信感度Ｌ１で電波信号Ａ１が復調されたパルス信号Ｂ１が繰返し出力され、これによって制御手段４が運転者を確認すると共に、施錠装置２１Ａを駆動しロックを解除して、フロントドア２０Ａの解錠が遠隔操作によって行われる。 Then, the radio wave signal A1 is received by the antenna 1 of the receiving device 5, and the demodulating means 2 sends the control means 4 the pulse signal B1 obtained by demodulating the radio signal A1 with the receiving sensitivity L1 as shown in FIG. 8B. Is repeatedly output, whereby the control means 4 confirms the driver, drives the locking device 21A to release the lock, and unlocks the front door 20A by remote control.

また、送信装置２５の操作部２７Ｂを押圧操作した場合には、図９（ａ）の波形図に示すような、スライドドア２０Ｂ開閉用の電波信号Ａ２が、送信装置２５から繰返し送信されると共に、復調手段２から制御手段４には、図９（ｂ）に示すような、パルス信号Ｂ２が繰返し出力され、制御手段４が電動装置２１Ｂを駆動して、スライドドア２０Ｂの開扉操作が行われる。 When the operation unit 27B of the transmission device 25 is pressed, a radio signal A2 for opening and closing the slide door 20B as shown in the waveform diagram of FIG. 9A is repeatedly transmitted from the transmission device 25. The pulse signal B2 as shown in FIG. 9 (b) is repeatedly output from the demodulating means 2 to the control means 4, and the control means 4 drives the electric device 21B to open the sliding door 20B. Is called.

さらに、操作部２７Ｃを押圧操作した場合にも、同様に、上記の電波信号Ａ１やＡ２とは異なる電波信号が送信装置２５から送信され、これを受信装置５が受信し、制御手段４が開扉装置２１Ｃを駆動して、トランクドア２０Ｃの開扉操作が行われる。 Further, when the operation unit 27C is pressed, similarly, a radio signal different from the radio signals A1 and A2 is transmitted from the transmission device 25, which is received by the reception device 5, and the control means 4 is opened. The door device 21C is driven to open the trunk door 20C.

つまり、車両に接近し機械式キーによって、各ドアの施解錠や開閉等を直接行うことに加え、携帯した送信装置２５を操作することによって、ある程度離れた場所からでも、各ドアの施解錠や開閉等を遠隔操作できるように構成されている。 In other words, in addition to directly locking / unlocking and opening / closing each door with a mechanical key when approaching the vehicle, by operating the portable transmitter 25, the door can be unlocked / unlocked from a certain distance. It is configured so that it can be opened and closed remotely.

なお、このような車両用通信システムにおいては、送信装置２５から送信される電波信号が、電波の強さ、即ち電界強度が同一となっているため、どのドアを遠隔操作する場合でも、ほぼ同じ距離の場所から操作が可能なようになっている。 In such a vehicle communication system, since the radio wave signal transmitted from the transmission device 25 has the same radio wave intensity, that is, the electric field strength, it is almost the same regardless of which door is remotely operated. It can be operated from a distance.

つまり、ロックは解除されるがドアは閉じたままで、周りの者には解錠が行われたことが判りづらいフロントドア２０Ａの解錠操作と、ドアが完全に開いてしまい、周りから視認が容易なスライドドア２０Ｂやトランクドア２０Ｃの開扉操作が、ほぼ同じ距離で行われる構成となっている。 In other words, the lock is released but the door remains closed, and it is difficult for those around to know that the unlocking has been performed. An easy opening operation of the sliding door 20B and the trunk door 20C is performed at substantially the same distance.

従って、ある程度離れた場所から遠隔操作する際に、例えば、操作部２７Ａを押圧しフロントドア２０Ａを解錠操作するつもりが、誤って操作部２７Ｂを押圧操作した場合には、この電波信号Ａ２を受信した受信装置５が電動装置２１Ｂを駆動して、スライドドア２０Ｂが開いてしまう。 Therefore, when remote control is performed from a certain distance, for example, when the operation unit 27A is pressed to unlock the front door 20A, but the operation unit 27B is pressed by mistake, the radio signal A2 is The received receiving device 5 drives the electric device 21B, and the slide door 20B is opened.

このため、このような誤操作が生じた場合の防犯対策として、例えば、解錠操作用の電波信号Ａ１については１回でも受信すると、受信装置５が直ちに施錠装置２１Ａを駆動しフロントドア２０Ａを解錠するが、開扉操作用の電波信号Ａ２等を受信した際には、この電波信号Ａ２等を所定時間の間、繰返して受信しないと、電動装置２１Ｂや開扉装置２１Ｃを駆動させないようになっている。 Therefore, as a crime prevention measure when such an erroneous operation occurs, for example, when the radio signal A1 for unlocking operation is received even once, the receiving device 5 immediately drives the locking device 21A to unlock the front door 20A. Although it is locked, when the radio signal A2 for opening operation is received, the electric device 21B and the door opening device 21C are not driven unless the radio signal A2 is received repeatedly for a predetermined time. It has become.

すなわち、解錠操作用の操作部２７Ａに対して、開扉操作用の操作部２７Ｂや２７Ｃは所定時間、例えば２〜３秒程度押圧し続けなければ、電動装置２１Ｂや開扉装置２１Ｃが駆動せず、スライドドア２０Ｂやトランクドア２０Ｃの開扉操作が行われないように構成されているものであった。 That is, if the operation unit 27B or 27C for opening the door does not keep pressing for a predetermined time, for example, about 2 to 3 seconds, the electric device 21B or the door opening device 21C is driven. Without opening the sliding door 20B or the trunk door 20C.

なお、この出願の発明に関連する先行技術文献情報としては、例えば、特許文献１が知られている。
特開２００５−２７１７６４号公報 As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2005-271664 A

しかしながら、上記従来の受信装置及びこれを用いた車両用通信システムにおいては、送信装置２５の複数の操作部２７Ａや２７Ｂ、２７Ｃの誤操作を防ぐため、例えば、これらの押圧操作時間を変え、受信装置５がその電波信号をカウントして駆動装置２１を駆動し、各ドアの施解錠や開閉等を行う等の防犯対策が必要となり、操作が煩雑なものになるという課題があった。 However, in the conventional receiving apparatus and the vehicle communication system using the receiving apparatus, in order to prevent erroneous operation of the plurality of operation units 27A, 27B, and 27C of the transmitting apparatus 25, for example, the pressing operation time is changed and the receiving apparatus is changed. 5 counts the radio signal and drives the drive device 21 to require security measures such as locking / unlocking and opening / closing each door, and there is a problem that the operation becomes complicated.

本発明は、このような従来の課題を解決するものであり、誤操作がなく、確実で容易な操作が可能な受信装置及びこれを用いた車両用通信システムを提供することを目的とする。 The present invention solves such a conventional problem, and an object thereof is to provide a receiving apparatus that can be operated reliably and easily without erroneous operation, and a vehicle communication system using the receiving apparatus.

上記目的を達成するために本発明は、以下の構成を有するものである。 In order to achieve the above object, the present invention has the following configuration.

本発明の請求項１に記載の発明は、受信感度切換手段を設けると共に、制御手段が受信した複数の電波信号に応じて、受信感度切換手段を切換えるようにして受信装置を構成したものであり、例えば、フロントドア解錠操作用の電波信号を受信した場合には、受信装置がそのまま受信して解錠操作を行うが、スライドドアやトランクドアの開扉操作用の電波信号を受信した場合には、制御手段が受信感度切換手段を切換え、受信感度を弱めることによって、フロントドアは比較的遠い距離からでも遠隔操作が可能であるが、スライドドアやトランクドアは接近した位置からしか操作ができなくなるため、押し間違い等の誤操作が生じづらくなると共に、押圧操作時間を変える等の煩雑な操作も不要となり、確実で容易な操作が可能な受信装置を得ることができるという作用を有する。 According to the first aspect of the present invention, the receiving device is configured such that the receiving sensitivity switching means is provided and the receiving sensitivity switching means is switched according to a plurality of radio wave signals received by the control means. For example, when a radio signal for front door unlocking operation is received, the receiving device receives it as it is to perform unlocking operation, but when receiving a radio signal for sliding door or trunk door opening operation The control means switches the reception sensitivity switching means and weakens the reception sensitivity, so that the front door can be operated remotely from a relatively long distance, but the slide door and trunk door can only be operated from close positions. Since it becomes impossible to perform erroneous operations such as pressing mistakes, complicated operations such as changing the pressing operation time are not required, and a receiving device capable of reliable and easy operation An effect that can be obtained.

請求項２に記載の発明は、請求項１記載の受信装置と、複数の操作部の操作に応じて複数の電波信号を送信する送信装置から形成され、受信装置の制御手段が受信した電波信号に応じて、複数の駆動装置を駆動するようにして車両用通信システム送信装置を構成したものであり、誤操作がなく、確実で容易な操作が可能な車両用通信システムを実現することができるという作用を有する。 The invention according to claim 2 is a radio signal formed by the receiving apparatus according to claim 1 and a transmitting apparatus that transmits a plurality of radio signals in response to operations of a plurality of operation units, and is received by the control means of the receiving apparatus. Accordingly, the vehicle communication system transmission device is configured to drive a plurality of drive devices, and it is possible to realize a vehicle communication system capable of reliable and easy operation without any erroneous operation. Has an effect.

以上のように本発明によれば、誤操作がなく、確実で容易な操作が可能な受信装置及びこれを用いた車両用通信システムを実現することができるという有利な効果が得られる。 As described above, according to the present invention, it is possible to obtain an advantageous effect that it is possible to realize a receiving apparatus that can be operated reliably and easily without erroneous operation, and a vehicle communication system using the receiving apparatus.

以下、本発明の実施の形態について、図１〜図６を用いて説明する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS.

なお、背景技術の項で説明した構成と同一構成の部分には同一符号を付して、詳細な説明を簡略化する。 In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of background art, and detailed description is simplified.

（実施の形態）
図１は本発明の一実施の形態による受信装置のブロック回路図であり、同図において、１はアンテナ、２はＩＣ等の復調手段で、アンテナ１がコイルやコンデンサを介して復調手段２に接続されると共に、この復調手段２にはトランジスタやリレー等のスイッチ１１が接続されている。 (Embodiment)
FIG. 1 is a block circuit diagram of a receiving apparatus according to an embodiment of the present invention. In the figure, 1 is an antenna, 2 is a demodulation means such as an IC, and the antenna 1 is connected to the demodulation means 2 via a coil or a capacitor. The demodulating means 2 is connected to a switch 11 such as a transistor or a relay.

また、１２はマイコン等の制御手段で、この制御手段１２に復調手段２が電気的に接続されると共に、制御手段１２がスイッチ１１に接続され、このスイッチ１１と複数の固定抵抗器１３Ａや１３Ｂによって受信感度切換手段が形成されて、受信装置１５が構成されている。 Reference numeral 12 denotes a control means such as a microcomputer. The demodulating means 2 is electrically connected to the control means 12, and the control means 12 is connected to the switch 11. The switch 11 and a plurality of fixed resistors 13A and 13B are connected. Thus, a receiving sensitivity switching means is formed, and the receiving device 15 is configured.

そして、このような受信装置１５が、図６の車両用通信システムの側面図に示すように、側面にフロントドア２０Ａやスライドドア２０Ｂ、背面にトランクドア２０Ｃが各々設けられた自動車２０の前方に装着されると共に、コネクタやリード線（図示せず）等によって車両の電子回路やバッテリ（図示せず）に電気的に接続される。 Then, as shown in the side view of the vehicle communication system in FIG. 6, such a receiving device 15 is provided in front of the automobile 20 provided with a front door 20 A and a slide door 20 B on the side surface and a trunk door 20 C on the back surface. It is mounted and electrically connected to a vehicle electronic circuit and a battery (not shown) by a connector, a lead wire (not shown) or the like.

さらに、この自動車２０には、モータやソレノイド（図示せず）等によって、フロントドア２０Ａには施錠装置２１Ａ、スライドドア２０Ｂには電動装置２１Ｂ、トランクドア２０Ｃには開扉装置２１Ｃの複数の駆動装置２１が形成されると共に、これらの駆動装置２１が受信装置１５の制御手段１２に電気的に接続されている。 Further, the motor vehicle 20 is driven by a motor, a solenoid (not shown) or the like, and the front door 20A has a locking device 21A, the sliding door 20B has an electric device 21B, and the trunk door 20C has a plurality of door opening devices 21C. A device 21 is formed and these drive devices 21 are electrically connected to the control means 12 of the receiver 15.

そして、このような自動車２０に装着された受信装置１５と、運転者が機械式キーと共に携帯する送信装置２５によって、車両用通信システムが構成されている。 And the communication system for vehicles is comprised by the receiver 15 with which such the motor vehicle 20 was mounted | worn, and the transmitter 25 which a driver | carrying device carries with a mechanical key.

以上の構成において、送信装置２５を持った運転者が自動車２０からある程度、例えば１０ｍ前後離れた場所で、フロントドア２０Ａの解錠を行うために、操作部２７Ａを押圧操作すると、送信装置２５からは、図２（ａ）の波形図に示すような、電波の強さ、即ち電界強度が５０ｄＢμＶ／ｍ前後の、フロントドア２０Ａ解錠用の固有の識別コードや駆動コードが、電波信号Ａ１として押圧操作している間、繰返し送信される。 In the above configuration, when the driver having the transmission device 25 presses the operation unit 27A to unlock the front door 20A to some extent, for example, about 10 m away from the automobile 20, the transmission device 25 As shown in the waveform diagram of FIG. 2A, a unique identification code or driving code for unlocking the front door 20A having a radio wave strength, that is, an electric field strength of around 50 dBμV / m, is used as the radio signal A1. During the pressing operation, it is repeatedly transmitted.

そして、この電波信号Ａ１を受信装置１５のアンテナ１が受信し、復調手段２から制御手段１２に、図２（ｂ）に示すような、受信感度Ｌ１で電波信号Ａ１が復調されたパルス信号Ｂ１が繰返し出力され、これによって制御手段１２が予め記憶した識別コードや駆動コードと照合して、運転者を確認すると共に、施錠装置２１Ａを駆動しロックを解除して、フロントドア２０Ａの解錠が遠隔操作によって行われる。 Then, the radio wave signal A1 is received by the antenna 1 of the receiving device 15, and the demodulating means 2 sends the pulse signal B1 demodulated from the radio signal A1 with the receiving sensitivity L1, as shown in FIG. Is repeatedly output, thereby checking the driver with the identification code and the drive code stored in advance by the control means 12, and driving the locking device 21A to release the lock so that the front door 20A is unlocked. This is done by remote control.

なお、この時、復調手段２はスイッチ１１を介して、抵抗値の小さな固定抵抗器１３Ａに接続されているため、−１００ｄＢｍ前後の受信感度Ｌ１で電波信号Ａ１を復調し、制御手段１２には復調手段２からパルス信号Ｂ１が繰返し出力される。 At this time, since the demodulating means 2 is connected to the fixed resistor 13A having a small resistance value via the switch 11, the radio signal A1 is demodulated with a receiving sensitivity L1 of about −100 dBm. The pulse signal B1 is repeatedly output from the demodulating means 2.

これに対し、同じく自動車２０から１０ｍ前後離れた場所で、送信装置２５の操作部２７Ｂを押圧操作した場合には、図３（ａ）の波形図に示すような、スライドドア２０Ｂ開閉用の電波信号Ａ２が、送信装置２５から繰返し送信され、これをアンテナ１が受信して、復調手段２から制御手段１２に、図３（ｂ）に示すような、パルス信号Ｂ２が出力されるが、この時、パルス信号Ｂ２を所定回数、例えば１〜３回程度受信した場合には、制御手段１２がスイッチ１１を切換える。 On the other hand, when the operation unit 27B of the transmission device 25 is pressed at a location about 10 m away from the automobile 20, the radio wave for opening and closing the slide door 20B as shown in the waveform diagram of FIG. The signal A2 is repeatedly transmitted from the transmission device 25, and this is received by the antenna 1, and the pulse signal B2 as shown in FIG. 3 (b) is output from the demodulation means 2 to the control means 12. When the pulse signal B2 is received a predetermined number of times, for example, about 1 to 3 times, the control means 12 switches the switch 11.

つまり、制御手段１２によってスイッチ１１が切換えられ、復調手段２には抵抗値の大きな固定抵抗器１３Ｂが接続されて、復調手段２の受信感度が下がり、−８２〜−８５ｄＢｍ前後の受信感度Ｌ２となるため、復調手段２が電波信号Ａ２を復調できなくなり、制御手段１２には信号Ｃ１が出力され、この場合には、制御手段１２が電動装置２１Ｂを駆動せず、スライドドア２０Ｂの開扉操作は行われない。 That is, the switch 11 is switched by the control means 12, and a fixed resistor 13B having a large resistance value is connected to the demodulation means 2, so that the reception sensitivity of the demodulation means 2 decreases, and the reception sensitivity L2 around −82 to −85 dBm is obtained. Therefore, the demodulating means 2 cannot demodulate the radio wave signal A2, and the control means 12 outputs the signal C1. In this case, the control means 12 does not drive the electric device 21B, and the sliding door 20B is opened. Is not done.

また、同様に、離れた場所から操作部２７Ｃを押圧操作した場合には、図４（ａ）の波形図に示すような、電波信号Ａ３が送信装置２５から送信され、これを受信装置１５が受信して、復調手段２から制御手段１２に、図４（ｂ）に示すような、パルス信号Ｂ３が出力されるが、この場合にも、制御手段１２が所定回数受信した後スイッチ１１を切換え、復調手段２の受信感度がＬ２となって、制御手段１２には信号Ｃ１が出力されるため、トランクドア２０Ｃの開扉操作は行われない。 Similarly, when the operation unit 27C is pressed from a remote location, a radio signal A3 is transmitted from the transmission device 25 as shown in the waveform diagram of FIG. 4B is output from the demodulating means 2 to the control means 12, and in this case, the switch 11 is switched after the control means 12 has received a predetermined number of times. Since the receiving sensitivity of the demodulating means 2 is L2 and the signal C1 is output to the control means 12, the opening operation of the trunk door 20C is not performed.

つまり、送信装置２５から送信される電波信号Ａ１やＡ２、Ａ３は、どのドアを遠隔操作する場合でも、同じ電波の強さで送信が行われるが、これを受信した受信装置１５は、制御手段１２が予め記憶した識別コードや駆動コードと照合して、受信感度切換手段のスイッチ１１の切換えを行い、解錠操作用の電波信号Ａ１については受信感度Ｌ１で受信し続け、開扉操作用の電波信号Ａ２やＡ３の場合には、受信感度の下がった受信感度Ｌ２で受信するようになっている。 That is, the radio signals A1, A2, and A3 transmitted from the transmission device 25 are transmitted with the same radio wave intensity regardless of which door is remotely operated. 12 is compared with the identification code or drive code stored in advance, and the switch 11 of the reception sensitivity switching means is switched, and the radio signal A1 for unlocking operation is continuously received at the reception sensitivity L1 for opening the door. In the case of the radio signals A2 and A3, reception is performed with the reception sensitivity L2 that has decreased in reception sensitivity.

すなわち、制御手段１２が受信した電波信号Ａ１やＡ２、Ａ３に応じて、受信感度切換手段を切換えることによって、フロントドア２０Ａの解錠操作用の電波信号Ａ１を受信した場合には、受信装置１５がそのまま受信して解錠操作を行うが、スライドドア２０Ｂやトランクドア２０Ｃの開扉操作用の電波信号Ａ２やＡ３を受信した場合には、これらのドアの開扉操作は行われないように構成されている。 That is, when the radio signal A1 for unlocking the front door 20A is received by switching the reception sensitivity switching means according to the radio signals A1, A2, and A3 received by the control means 12, the receiving device 15 Is received as it is and the unlocking operation is performed. However, when the radio signals A2 and A3 for opening the sliding door 20B and the trunk door 20C are received, the opening operation of these doors is not performed. It is configured.

したがって、ロックは解除されるがドアは閉じたままで、周りの者には解錠が行われたことが判りづらいフロントドア２０Ａの解錠操作は、１０ｍ前後の比較的遠い距離からでも遠隔操作が可能であるが、ドアが完全に開いてしまい、周りから視認が容易なスライドドア２０Ｂやトランクドア２０Ｃの開扉操作は、自動車２０から離れた場所からは遠隔操作が行えないようになっている。 Therefore, the unlocking operation of the front door 20A, which is unlocked but the door remains closed and it is difficult for those around to know that the unlocking has been performed, can be remotely operated even from a relatively long distance of about 10 m. Although it is possible, the door is completely opened, and the door opening operation of the sliding door 20B and the trunk door 20C that can be easily seen from the surroundings cannot be remotely operated from a place away from the automobile 20. .

なお、自動車２０に接近、例えば１ｍ前後まで近づいて、例えば送信装置２５の操作部２７Ｂを押圧操作した場合には、上記と同様に制御手段１２によってスイッチ１１が切換えられ、図５（ａ）の波形図に示すように、復調手段２の受信感度が下がり受信感度はＬ２となるが、受信装置１５と送信装置２５の距離が短く、受信装置１５が受信する電波が強いため、復調手段２から制御手段１２には、図５（ｂ）に示すような、パルス信号Ｂ２が繰返し出力され、制御手段１２が電動装置２１Ｂを駆動して、スライドドア２０Ｂの開扉操作が行われる。 When the vehicle 20 approaches, for example, approaches 1 m, for example, when the operation unit 27B of the transmission device 25 is pressed, the switch 11 is switched by the control means 12 in the same manner as described above. As shown in the waveform diagram, the receiving sensitivity of the demodulating means 2 decreases and the receiving sensitivity becomes L2, but since the distance between the receiving device 15 and the transmitting device 25 is short and the radio waves received by the receiving device 15 are strong, the demodulating means 2 A pulse signal B2 as shown in FIG. 5 (b) is repeatedly output to the control means 12, and the control means 12 drives the electric device 21B to open the sliding door 20B.

つまり、送信装置２５の操作部２７Ｂや２７Ｃを押圧操作すると、受信装置１５の受信感度が下がり受信感度はＬ２となるが、自動車２０に接近してこれらの操作を行った場合には、受信装置１５が受信する電波が強くなるため、スライドドア２０Ｂやトランクドア２０Ｃの開扉操作が可能なようになっている。 That is, when the operation unit 27B or 27C of the transmission device 25 is pressed, the reception sensitivity of the reception device 15 decreases and the reception sensitivity becomes L2. However, when these operations are performed close to the automobile 20, the reception device Since the radio wave received by 15 becomes stronger, the sliding door 20B and the trunk door 20C can be opened.

なお、以上の説明では、送信装置２５から電界強度が５０ｄＢμＶ／ｍ前後の、電波信号Ａ１やＡ２、Ａ３を送信し、受信装置１５の受信感度を、−１００ｄＢｍ前後の受信感度Ｌ１と−８２〜−８５ｄＢｍ前後の受信感度Ｌ２に切換える構成について説明したが、送信装置２５の電波信号の電界強度が大きく、例えば７０ｄＢμＶ／ｍ前後である場合には、受信感度Ｌ１を−８０ｄＢｍ前後に、受信感度Ｌ２を−６２〜−６５ｄＢｍ前後に切換える等、送信装置２５の電波信号の強さに応じて、受信感度Ｌ１やＬ２の設定を行うことで、より確実な遠隔操作を行うことができる。 In the above description, radio signals A1, A2, and A3 having an electric field strength of about 50 dBμV / m are transmitted from the transmission device 25, and the reception sensitivity of the reception device 15 is set to the reception sensitivity L1 of about −100 dBm and −82˜. The configuration of switching to the reception sensitivity L2 of about −85 dBm has been described. However, when the electric field strength of the radio signal of the transmission device 25 is large, for example, about 70 dBμV / m, the reception sensitivity L1 is set to about −80 dBm, and the reception sensitivity L2 is set. By setting the reception sensitivities L1 and L2 in accordance with the strength of the radio wave signal of the transmission device 25, such as switching from −62 to −65 dBm, a more reliable remote operation can be performed.

このように本実施の形態によれば、スイッチ１１や固定抵抗器１３Ａ、１３Ｂから形成された受信感度切換手段を設けると共に、制御手段１２が受信した複数の電波信号に応じて、受信感度切換手段を切換えることによって、例えば、フロントドア２０Ａは比較的遠い距離からでも遠隔操作が可能であるが、スライドドア２０Ｂやトランクドア２０Ｃは接近した位置からしか操作ができなくなるため、押し間違い等の誤操作が生じづらくなると共に、押圧操作時間を変える等の煩雑な操作も不要となり、確実で容易な操作が可能な受信装置及びこれを用いた車両用通信システムを得ることができるものである。 As described above, according to the present embodiment, the reception sensitivity switching means formed from the switch 11 and the fixed resistors 13A and 13B is provided, and the reception sensitivity switching means according to the plurality of radio wave signals received by the control means 12. For example, the front door 20A can be remotely operated even from a relatively long distance, but the slide door 20B and the trunk door 20C can be operated only from close positions. In addition to being difficult to generate, complicated operations such as changing the pressing operation time are not required, and a receiving device capable of reliable and easy operation and a vehicle communication system using the same can be obtained.

なお、以上の説明では、復調手段２に接続されたスイッチ１１や固定抵抗器１３Ａ、１３Ｂによって、受信感度切換手段を形成した構成について説明したが、アンテナ１と復調手段２の間に、スイッチと固定抵抗器によって受信感度切換手段を形成し、これを制御手段１２が切換える構成や、アンテナ１とは別にもう一つアンテナを設け、このアンテナを発信させて受信感度の切換えを行う構成等としても、本発明の実施は可能である。 In the above description, the configuration in which the reception sensitivity switching means is formed by the switch 11 and the fixed resistors 13A and 13B connected to the demodulating means 2 has been described. A configuration in which the reception sensitivity switching means is formed by a fixed resistor and this is switched by the control means 12, or another antenna is provided separately from the antenna 1, and the reception sensitivity is switched by transmitting this antenna, etc. Implementation of the present invention is possible.

また、以上の説明では、送信装置２５から受信装置１５へ電波信号を送信する、所謂キーレスシステムについて説明したが、送信装置と受信装置の双方に送信手段と受信手段を設け、送信装置と受信装置が互いに通信を行う、所謂スマートエントリシステムとしても、実施は可能である。 In the above description, a so-called keyless system that transmits radio signals from the transmission device 25 to the reception device 15 has been described. However, both the transmission device and the reception device are provided with transmission means and reception means, and the transmission device and the reception device are provided. It can also be implemented as a so-called smart entry system that communicates with each other.

本発明による受信装置及びこれを用いた車両用通信システムは、誤操作がなく、確実で容易な操作が可能なものが得られ、主に自動車のドアの施解錠や開閉操作用として有用である。 The receiving device according to the present invention and a vehicle communication system using the same can be obtained without any erroneous operation and can be reliably and easily operated, and are mainly useful for locking / unlocking and opening / closing an automobile door.

本発明の一実施の形態による受信装置のブロック回路図1 is a block circuit diagram of a receiving apparatus according to an embodiment of the present invention. 同波形図Waveform diagram 同波形図Waveform diagram 同波形図Waveform diagram 同波形図Waveform diagram 車両用通信システムの側面図Side view of vehicle communication system 従来の受信装置のブロック回路図Block circuit diagram of conventional receiver 同波形図Waveform diagram 同波形図Waveform diagram

符号の説明Explanation of symbols

１アンテナ
２復調手段
１１スイッチ
１２制御手段
１３Ａ、１３Ｂ固定抵抗器
１５受信装置
２０自動車
２０Ａフロントドア
２０Ｂスライドドア
２０Ｃトランクドア
２１駆動装置
２１Ａ施錠装置
２１Ｂ電動装置
２１Ｃ開扉装置
２５送信装置
２６ケース
２７Ａ、２７Ｂ、２７Ｃ操作部 DESCRIPTION OF SYMBOLS 1 Antenna 2 Demodulation means 11 Switch 12 Control means 13A, 13B Fixed resistor 15 Receiving device 20 Car 20A Front door 20B Sliding door 20C Trunk door 21 Drive device 21A Locking device 21B Electric device 21C Opening device 25 Transmitting device 26 Case 27A, 27B, 27C Operation unit

Claims

複数の電波信号を受信するアンテナと、このアンテナの電波信号を復調する復調手段と、この復調手段に接続された制御手段からなり、受信感度切換手段を設けると共に、上記制御手段が受信した電波信号に応じて、上記受信感度切換手段を切換える受信装置。 An antenna for receiving a plurality of radio signals, a demodulating means for demodulating the radio signals of the antenna, and a control means connected to the demodulating means, provided with a reception sensitivity switching means, and a radio signal received by the control means A receiving device for switching the receiving sensitivity switching means according to the above.

請求項１記載の受信装置と、複数の操作部の操作に応じて複数の電波信号を送信する送信装置からなり、上記受信装置の制御手段が受信した電波信号に応じて、複数の駆動装置を駆動する車両用通信システム。 A receiving device according to claim 1 and a transmitting device for transmitting a plurality of radio signals in response to operations of a plurality of operation units, wherein a plurality of driving devices are provided in accordance with the radio signals received by the control means of the receiving device. A vehicle communication system to be driven.