JP2005231579A - Tire air pressure monitoring device - Google Patents

Tire air pressure monitoring device Download PDF

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JP2005231579A
JP2005231579A JP2004046205A JP2004046205A JP2005231579A JP 2005231579 A JP2005231579 A JP 2005231579A JP 2004046205 A JP2004046205 A JP 2004046205A JP 2004046205 A JP2004046205 A JP 2004046205A JP 2005231579 A JP2005231579 A JP 2005231579A
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tire
air pressure
sensor
magnet
data
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Akihiro Taguchi
明広 田口
Onori Kato
大典 加藤
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Denso Corp
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Denso Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To specify which tire transmission data is data of air pressure in, without performing a work for registering ID. <P>SOLUTION: A magnet 4 is mounted on a vehicle main body 3 side. In each tire 2, a sensor part 1 for measuring air pressure and a proximity sensor 5 for generating a signal when the sensor 5 approaches to the magnet 4 are mounted. The signal of the proximity sensor 5 is transmitted by radio, together with data of air pressure. By changing arrangement patterns (number) of the magnet 4 for every arrangement position of each tire 2, signal patterns of the proximity sensors 5 are made different for each of the proximity sensors 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、車両のタイヤ内に組み込まれたセンサによりタイヤ内の空気圧力を測定し、車体側に設けられた受信機に無線で送信してタイヤ内の空気圧力を監視するタイヤ空気圧監視装置に関する。   The present invention relates to a tire pressure monitoring device that measures the air pressure in a tire by a sensor incorporated in a tire of a vehicle and wirelessly transmits it to a receiver provided on the vehicle body side to monitor the air pressure in the tire. .

従来のタイヤ空気圧監視装置においては、各タイヤの空気圧力に関するデータが各タイヤ内のセンサから無線で送信され、車体側に設けられた受信機は一つのアンテナで各タイヤからの送信データを受信するようになっている（例えば、特許文献１参照）。   In a conventional tire pressure monitoring device, data relating to the air pressure of each tire is transmitted wirelessly from a sensor in each tire, and a receiver provided on the vehicle body side receives transmission data from each tire with a single antenna. (For example, refer to Patent Document 1).

そして、受信機においては、送信データがどのタイヤの空気圧力に関するデータであるかを特定(認識)する必要があるため、各センサに個別にＩＤ（識別信号）をもたせている。
特開２００１−３２２４１１号公報 In the receiver, since it is necessary to identify (recognize) which tire air pressure is related to the transmission data, each sensor is individually provided with an ID (identification signal).
JP 2001-322411 A

しかしながら、ＩＤを登録するには手動での作業が必要となる。その上、タイヤローテーション時にも再度ＩＤを登録する作業が発生してしまう。   However, manual operation is required to register the ID. In addition, an operation for registering the ID again occurs during tire rotation.

本発明は上記点に鑑みて、ＩＤを登録する作業をすることなく、送信データがどのタイヤの空気圧力に関するデータであるかを特定できるようにすることを目的とする。   In view of the above, an object of the present invention is to make it possible to specify which tire is related to the air pressure of transmission data without performing an operation of registering an ID.

上記目的を達成するため、請求項１に記載の発明では、各タイヤ（２）に装着され、タイヤ（２）内の空気圧力を測定して空気圧力のデータを無線により送信するセンサ部（１）と、車両本体（３）側に設置され、空気圧力のデータを受信してタイヤ（２）内の空気圧力を監視する受信機とを備えたタイヤ空気圧監視装置において、車両本体（３）側に装着され、タイヤ（２）の周辺に配置された磁石（４）またはコイルと、各タイヤ（２）に装着され、磁石（４）またはコイルに近接したときに信号を発生する近接センサ（５）とを備え、磁石（４）またはコイルの数又は配置パターンが各タイヤ（２）の配置位置毎に異なり、センサ部（１）は、近接センサ（５）の検知結果に基づく信号を空気圧力のデータとともに無線により送信することを特徴とする。   In order to achieve the above object, according to the first aspect of the present invention, the sensor unit (1) is mounted on each tire (2), measures the air pressure in the tire (2), and transmits air pressure data wirelessly. ) And a receiver that is installed on the vehicle body (3) side and receives air pressure data and monitors the air pressure in the tire (2), the vehicle body (3) side A magnet (4) or coil disposed around the tire (2) and a proximity sensor (5) that is mounted on each tire (2) and generates a signal when close to the magnet (4) or coil. ), The number of magnets (4) or coils or the arrangement pattern differs for each arrangement position of each tire (2), and the sensor unit (1) sends a signal based on the detection result of the proximity sensor (5) to the air pressure Wirelessly with data And wherein the door.

これによると、磁石またはコイルの数又は配置パターンが各タイヤの配置位置毎に異なるため、近接センサの信号パターンが各近接センサ毎に異なる。したがって、送信データがどのタイヤの空気圧力に関するデータであるかを特定することができる。   According to this, since the number or arrangement pattern of magnets or coils is different for each arrangement position of each tire, the signal pattern of the proximity sensor is different for each proximity sensor. Therefore, it is possible to specify which tire air pressure data the transmission data is.

なお、上記各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。   In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

（第１実施形態）
本発明の第１実施形態について説明する。図１は第１実施形態に係るタイヤ空気圧監視装置の全体構成を模式的に示す図、図２は図１の各近接センサの出力信号を示す波形図である。 (First embodiment)
A first embodiment of the present invention will be described. FIG. 1 is a diagram schematically showing the overall configuration of the tire pressure monitoring apparatus according to the first embodiment, and FIG. 2 is a waveform diagram showing output signals of the proximity sensors in FIG.

図１に示すように、タイヤ空気圧監視装置は、タイヤ２内の空気圧力を測定して空気圧力のデータを無線により送信するセンサ部１を備え、このセンサ部１は車両の各タイヤ２に１つずつ組み込まれている。センサ部１は、周知のものであり、圧力センサ、温度センサ、制御回路、送信回路および電池から構成されている。因みに、圧力センサは、タイヤ２内の空気圧力を測定し、温度センサはタイヤ２内の空気温度を測定する。制御回路は、圧力センサおよび温度センサのそれぞれの測定値に基づいて送信データを生成する。送信回路は、生成された送信データを所定の変調方式（ＡＳＫ、ＦＳＫ等）で変調して無線により送信する。   As shown in FIG. 1, the tire pressure monitoring device includes a sensor unit 1 that measures the air pressure in the tire 2 and wirelessly transmits air pressure data. The sensor unit 1 is provided for each tire 2 of the vehicle. Built in one by one. The sensor unit 1 is a well-known one and includes a pressure sensor, a temperature sensor, a control circuit, a transmission circuit, and a battery. Incidentally, the pressure sensor measures the air pressure in the tire 2, and the temperature sensor measures the air temperature in the tire 2. The control circuit generates transmission data based on the measured values of the pressure sensor and the temperature sensor. The transmission circuit modulates the generated transmission data with a predetermined modulation method (ASK, FSK, etc.) and transmits the data wirelessly.

車両本体３には、タイヤ２の周辺（例えばタイヤハウス内）に磁石４が装着されている。磁石４の配置パターンは各タイヤ２の配置位置毎に異ならせてあり、具体的には、磁石４は、右前輪（ＦＲ）の周辺に１個、左前輪（ＦＬ）の周辺に４個、右後輪（ＲＲ）の周辺に２個、左後輪（ＲＬ）の周辺に３個、それぞれ配置されている。   A magnet 4 is mounted on the vehicle body 3 around the tire 2 (for example, in a tire house). The arrangement pattern of the magnets 4 is different for each arrangement position of the tires 2. Specifically, one magnet 4 is provided around the right front wheel (FR), and four around the left front wheel (FL). Two are arranged around the right rear wheel (RR), and three are arranged around the left rear wheel (RL).

また、各タイヤ２には、磁石４に近接したときにパルス信号（図２参照）を発生する近接センサ５が組み込まれている。近接センサ５は、例えばリードスイッチを用いる。近接センサ５はセンサ部１と電気的に接続されており、近接センサ５の信号はセンサ部１に送られる。   Each tire 2 incorporates a proximity sensor 5 that generates a pulse signal (see FIG. 2) when approaching the magnet 4. The proximity sensor 5 uses a reed switch, for example. The proximity sensor 5 is electrically connected to the sensor unit 1, and a signal from the proximity sensor 5 is sent to the sensor unit 1.

センサ部１は、所定の検出時間（例えば１秒）中に発生した近接センサ５のパルス信号数をカウントし、カウントしたパルス信号数のデータを、タイヤ空気圧力等のデータとともに所定時間（例えば１分）毎に送信するようになっている。   The sensor unit 1 counts the number of pulse signals of the proximity sensor 5 generated during a predetermined detection time (for example, 1 second), and the data of the counted number of pulse signals together with data such as tire air pressure for a predetermined time (for example, 1). Every minute).

各センサ部１から送信された送信データは、車両本体３に設置された１つの受信機６にて受信される。受信機６は、タイヤ空気圧力が正常値でない場合、車室内の計器盤に設置された表示装置７にその旨を表示させるようになっている。また、この受信機６には、図示しない車載の電子制御装置（例えば、燃料噴射装置の電子制御装置）から、車速データが入力される。   The transmission data transmitted from each sensor unit 1 is received by one receiver 6 installed in the vehicle body 3. When the tire air pressure is not a normal value, the receiver 6 displays the fact on the display device 7 installed on the instrument panel in the passenger compartment. Further, vehicle speed data is input to the receiver 6 from a vehicle-mounted electronic control device (not shown) (for example, an electronic control device of a fuel injection device).

上記構成において、近接センサ５は、各タイヤ２の回転に伴って磁石４に近接したときにパルス信号を発生する。詳細には、図２に示すように、近接センサ５は、タイヤ２が１周する度に各タイヤ２の周辺に配置された磁石４の数に対応した数のパルス信号を発生する。   In the above configuration, the proximity sensor 5 generates a pulse signal when approaching the magnet 4 as each tire 2 rotates. Specifically, as shown in FIG. 2, the proximity sensor 5 generates a number of pulse signals corresponding to the number of magnets 4 arranged around each tire 2 every time the tire 2 makes one round.

受信機６は、センサ部１から送信された送信データ中のパルス信号数を、近接センサ５がパルス信号数をカウントしている際の車速で除して、各センサ部１のパルス信号数比較値を演算する。そして、各センサ部１のパルス信号数比較値を比較し、パルス信号数比較値が最も大きいものが左前輪（ＦＬ）のタイヤの送信データであると特定し、パルス信号数比較値が２番目に大きいものが左後輪（ＲＬ）のタイヤの送信データであると特定し、パルス信号数比較値が３番目に大きいものが右後輪（ＲＲ）のタイヤの送信データであると特定し、パルス信号数比較値が最も小さいものが右前輪（ＦＲ）のタイヤの送信データであると特定する。   The receiver 6 divides the number of pulse signals in the transmission data transmitted from the sensor unit 1 by the vehicle speed when the proximity sensor 5 is counting the number of pulse signals, and compares the number of pulse signals of each sensor unit 1 Calculate the value. Then, the pulse signal number comparison value of each sensor unit 1 is compared, and it is determined that the largest pulse signal number comparison value is the transmission data of the tire of the left front wheel (FL), and the pulse signal number comparison value is the second. Is specified as the transmission data of the tire of the left rear wheel (RL), and the third largest pulse signal number comparison value is specified as the transmission data of the tire of the right rear wheel (RR), The data having the smallest pulse signal number comparison value is specified as the transmission data of the tire on the right front wheel (FR).

したがって、ＩＤを登録する作業をすることなく、送信データがどのタイヤのデータであるかの自動認識(識別)が可能となる。   Therefore, automatic recognition (identification) of which tire data the transmission data is can be performed without registering the ID.

（第２実施形態）
本発明の第２実施形態について説明する。図３は第２実施形態に係るタイヤ空気圧監視装置の要部構成を模式的に示す図、図４は図３の各近接センサの出力信号を示す波形図である。なお、第１実施形態と同一もしくは均等部分には同一の符号を付し、その説明を省略する。 (Second Embodiment)
A second embodiment of the present invention will be described. FIG. 3 is a diagram schematically illustrating a main configuration of the tire pressure monitoring device according to the second embodiment, and FIG. 4 is a waveform diagram illustrating output signals of the proximity sensors in FIG. In addition, the same code | symbol is attached | subjected to the same or equivalent part as 1st Embodiment, and the description is abbreviate | omitted.

第１実施形態では、磁石４の数を各タイヤ２の配置位置毎に異ならせたが、本実施形態では、図３に示すように、２つの磁石４のタイヤ回転方向間隔を各タイヤ２の配置位置毎に異ならせている。   In the first embodiment, the number of the magnets 4 is made different for each arrangement position of each tire 2. However, in this embodiment, as shown in FIG. Different positions are used.

本実施形態によると、図４に示すように、例えば右前輪（ＦＲ）の近接センサ５のパルス信号のパルス間隔ｔ１と、右後輪（ＲＲ）の近接センサ５のパルス信号のパルス間隔ｔ２とが異なる。   According to this embodiment, as shown in FIG. 4, for example, the pulse interval t1 of the pulse signal of the proximity sensor 5 for the right front wheel (FR) and the pulse interval t2 of the pulse signal of the proximity sensor 5 for the right rear wheel (RR) Is different.

受信機６は、センサ部１から送信された送信データ中のパルス間隔を、近接センサ５がパルス間隔を測定している際の車速で除して、各センサ部１のパルス間隔比較値を演算する。そして、各センサ部１のパルス間隔比較値を比較し、パルス間隔比較値の大小によって、送信データがどのタイヤのデータであるかを特定する。   The receiver 6 calculates the pulse interval comparison value of each sensor unit 1 by dividing the pulse interval in the transmission data transmitted from the sensor unit 1 by the vehicle speed when the proximity sensor 5 measures the pulse interval. To do. And the pulse interval comparison value of each sensor part 1 is compared, and it is identified which tire data the transmission data is based on the magnitude of the pulse interval comparison value.

したがって、ＩＤを登録する作業をすることなく、送信データがどのタイヤのデータであるかの自動認識(識別)が可能となる。   Therefore, automatic recognition (identification) of which tire data the transmission data is can be performed without registering the ID.

（他の実施形態）
上記各実施形態では、磁石４とリードスイッチ式の近接センサ５とを組み合わせて用いたが、磁石４の代わりにコイルを用い、近接センサ５としてコイルを用いてもよい。 (Other embodiments)
In each of the above embodiments, the magnet 4 and the reed switch type proximity sensor 5 are used in combination, but a coil may be used instead of the magnet 4 and a coil may be used as the proximity sensor 5.

本発明の第１実施形態に係るタイヤ空気圧監視装置の全体構成を模式的に示す図である。It is a figure showing typically the whole tire pressure monitoring device composition concerning a 1st embodiment of the present invention. 図１の各近接センサの出力信号を示す波形図である。It is a wave form diagram which shows the output signal of each proximity sensor of FIG. 本発明の第２実施形態に係るタイヤ空気圧監視装置の要部構成を模式的に示す図である。It is a figure which shows typically the principal part structure of the tire pressure monitoring apparatus which concerns on 2nd Embodiment of this invention. 図３の各近接センサの出力信号を示す波形図である。It is a wave form diagram which shows the output signal of each proximity sensor of FIG.

符号の説明Explanation of symbols

１…センサ部、２…タイヤ、３…車両本体、４…磁石、５…近接センサ。   DESCRIPTION OF SYMBOLS 1 ... Sensor part, 2 ... Tire, 3 ... Vehicle main body, 4 ... Magnet, 5 ... Proximity sensor.

Claims (1)

各タイヤ（２）に装着され、前記タイヤ（２）内の空気圧力を測定して空気圧力のデータを無線により送信するセンサ部（１）と、
車両本体（３）側に設置され、前記空気圧力のデータを受信して前記タイヤ（２）内の空気圧力を監視する受信機とを備えたタイヤ空気圧監視装置において、
前記車両本体（３）側に装着され、前記タイヤ（２）の周辺に配置された磁石（４）またはコイルと、
各タイヤ（２）に装着され、前記磁石（４）またはコイルに近接したときに信号を発生する近接センサ（５）とを備え、
前記磁石（４）またはコイルの数又は配置パターンが各タイヤ（２）の配置位置毎に異なり、
前記センサ部（１）は、前記近接センサ（５）の検知結果に基づく信号を前記空気圧力のデータとともに無線により送信することを特徴とするタイヤ空気圧監視装置。 A sensor unit (1) mounted on each tire (2), for measuring the air pressure in the tire (2) and transmitting air pressure data by radio;
In a tire pressure monitoring device provided on a vehicle main body (3) side and having a receiver that receives the air pressure data and monitors the air pressure in the tire (2),
A magnet (4) or a coil mounted on the vehicle body (3) side and disposed around the tire (2);
A proximity sensor (5) mounted on each tire (2) and generating a signal when close to the magnet (4) or coil;
The number or arrangement pattern of the magnets (4) or coils is different for each arrangement position of each tire (2),
The tire pressure monitoring device, wherein the sensor unit (1) wirelessly transmits a signal based on the detection result of the proximity sensor (5) together with the air pressure data.
JP2004046205A 2004-02-23 2004-02-23 Tire air pressure monitoring device Pending JP2005231579A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009046121A (en) * 2007-08-18 2009-03-05 Silicon Valley Micro C Corp Tire parameter monitoring system with sensor location using magnetic field
JP2012171584A (en) * 2011-02-24 2012-09-10 Tokai Rika Co Ltd Air pressure monitoring system for tire
WO2019031642A1 (en) * 2017-08-07 2019-02-14 전남대학교산학협력단 Tire location registering method and device by using ifs pattern of tpms sensor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009046121A (en) * 2007-08-18 2009-03-05 Silicon Valley Micro C Corp Tire parameter monitoring system with sensor location using magnetic field
EP2028026A3 (en) * 2007-08-18 2014-06-04 Silicon Valley Micro C Corporation Tire parameter monitoring system with sensor location using magnetic fields
JP2012171584A (en) * 2011-02-24 2012-09-10 Tokai Rika Co Ltd Air pressure monitoring system for tire
WO2019031642A1 (en) * 2017-08-07 2019-02-14 전남대학교산학협력단 Tire location registering method and device by using ifs pattern of tpms sensor
KR20190015796A (en) * 2017-08-07 2019-02-15 전남대학교산학협력단 Tire location registration method and apparatus using Inter Frame Spacing pattern of TPMS sensor
KR101979777B1 (en) * 2017-08-07 2019-05-17 전남대학교산학협력단 Tire location registration method and apparatus using Inter Frame Spacing pattern of TPMS sensor

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