JP4770357B2 - Tire pressure monitoring device - Google Patents

Tire pressure monitoring device Download PDF

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JP4770357B2
JP4770357B2 JP2005276213A JP2005276213A JP4770357B2 JP 4770357 B2 JP4770357 B2 JP 4770357B2 JP 2005276213 A JP2005276213 A JP 2005276213A JP 2005276213 A JP2005276213 A JP 2005276213A JP 4770357 B2 JP4770357 B2 JP 4770357B2
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pressure
tire
ignition
sensor
alarm
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JP2007083911A (en
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興司 中谷
利光 海老沼
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Yokohama Rubber Co Ltd
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Description

本発明は、タイヤ空気圧監視装置に関し、更に詳しくは、ホイールやタイヤの盗難や空気を故意に抜く愉快犯等の犯罪に対して抑制効果を発揮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, and more particularly to a tire pressure monitoring device that exerts a suppression effect on crimes such as theft of wheels and tires and pleasant crimes that intentionally extract air.

近年、車両の盗難に加えて、車両に装着したホイールやタイヤの盗難が発生している。このホイールやタイヤの盗難は、一般に次の方法で行われている。先ず、駐車中の車両の車体の下に煉瓦やブロックを入れ、次いでタイヤの空気をバルブから全て抜く。これにより、車体が低くなってブロック等に支えられ、タイヤが地面から浮き上がった状態となる。この状態でホイールを車軸に取り付けているナットを外し、ホイールを車体から取り外す。   In recent years, in addition to theft of vehicles, thefts of wheels and tires attached to vehicles have occurred. The wheel or tire is generally stolen by the following method. First, a brick or block is placed under the body of a parked vehicle, and then all the tire air is vented from the valve. As a result, the vehicle body is lowered and supported by a block or the like, and the tire is lifted from the ground. In this state, remove the nut that attaches the wheel to the axle, and remove the wheel from the vehicle body.

また、盗難だけでなく、タイヤをアイスピック等により刺して、空気を故意に抜く愉快犯等の犯罪も発生している。   In addition to theft, crimes such as pleasant crimes in which the tire is stabbed with an ice pick or the like and the air is deliberately removed have also occurred.

従来、車両の盗難を防止する装置は種々提案されている（例えば、特許文献１、２参照）。しかしながら、このようなホイールやタイヤの盗難や空気を故意に抜く愉快犯等の犯罪に対して有効な解決手段とは成りえず、その提案が強く望まれていた。
特開平８−２４４５５９号公報 特開２００２−３６２３１８号公報 Conventionally, various devices for preventing vehicle theft have been proposed (see, for example, Patent Documents 1 and 2). However, it cannot be an effective solution for such crimes such as theft of wheels and tires and pleasant crimes that deliberately deflate the air, and its proposal has been strongly desired.
JP-A-8-244559 JP 2002-362318 A

本発明の目的は、ホイールやタイヤの盗難や空気を故意に抜く愉快犯等の犯罪に対して抑制効果を発揮するタイヤ空気圧監視装置を提供することにある。   An object of the present invention is to provide a tire air pressure monitoring device that exerts a suppression effect on crimes such as theft of wheels and tires and pleasant crimes that deliberately remove air.

上記目的を達成する本発明のタイヤ空気圧監視装置は、車両に装着されたタイヤの空気圧を検出する圧力センサと、前記車両のイグニッションのオン・オフを検出するイグニッションセンサと、前記圧力センサが検出した圧力信号及び前記イグニッションセンサが検出した信号を処理する処理手段と、警報を発生する警報手段と、前記タイヤの空気圧を表示可能な表示手段とを備え、前記処理手段は、前記イグニッションセンサから前記イグニッションがオフであることを示す信号を受け取った場合には、前記圧力センサから入力された圧力信号を処理して前記タイヤの空気圧の単位時間当たりの減少量の値が予め設定した閾値以上であるか否かを判定すると共に、その閾値以上であると判定した場合には、前記警報手段に作動信号を出力し、前記イグニッションセンサから前記イグニッションがオンであることを示す信号を受け取った場合には、前記圧力センサから入力された圧力信号を処理して前記タイヤの空気圧を前記表示手段に表示させることを特徴とする。 The tire pressure monitoring device of the present invention that achieves the above object is a pressure sensor that detects the pressure of a tire mounted on a vehicle, an ignition sensor that detects on / off of the ignition of the vehicle, and the pressure sensor detects A processing means for processing a pressure signal and a signal detected by the ignition sensor, an alarm means for generating an alarm, and a display means capable of displaying the tire air pressure, the processing means from the ignition sensor to the ignition When a signal indicating that the tire pressure is off is received, the pressure signal input from the pressure sensor is processed to determine whether the value of the amount of decrease in tire air pressure per unit time is equal to or greater than a preset threshold value. And if it is determined that the threshold value is exceeded, an operation signal is output to the alarm means. Wherein when the the ignition sensor ignition has received a signal indicating that it is turned on, and wherein the displaying the air pressure of the tire by processing the pressure signal inputted from the pressure sensor on the display means .

上述した本発明によれば、圧力センサにより検出したタイヤの空気圧の単位時間当たりの減少量が所定量以上になった際に警報を発する警報手段を有するので、エンジンをオフにした駐車時にタイヤの空気をバルブから抜いて、ホイールやタイヤを盗もうとした際に警報手段が警報を発することが可能になるので、ホイールやタイヤの盗難を防ぐことができる一方、タイヤをアイスピック等により刺して空気を故意に抜かれた際にも警報手段が警報を発することが可能になるので、残りのタイヤが被害を被るのを防止することができる。   According to the present invention described above, the alarm means for issuing an alarm when the amount of decrease in the tire air pressure detected by the pressure sensor per unit time exceeds a predetermined amount is provided. When the air is removed from the valve and the wheel or tire is stolen, the alarm means can issue an alarm, so the wheel or tire can be prevented from being stolen. Even when the air is deliberately extracted, the alarm means can issue an alarm, so that the remaining tires can be prevented from being damaged.

従って、ホイールやタイヤの盗難や空気を故意に抜く愉快犯等の犯罪に対して抑制効果を発揮するタイヤ空気圧監視装置の提供が可能になる。   Therefore, it is possible to provide a tire pressure monitoring device that exerts an effect of suppressing crimes such as theft of wheels and tires and pleasant crimes that intentionally extract air.

以下、本発明の実施の形態について添付の図面を参照しながら詳細に説明する。
図１は本発明のタイヤ空気圧監視装置の一実施形態を示し、１はタイヤ側に取り付けられるタイヤ側ユニット、２は車両側に取り付けられる車両側ユニットである。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an embodiment of a tire air pressure monitoring apparatus according to the present invention, wherein 1 is a tire side unit attached to the tire side, and 2 is a vehicle side unit attached to the vehicle side.

タイヤ側ユニット１は、車両に装着したタイヤの空洞部内の空気圧を検出する圧力センサ３と、この圧力センサ３で検出した圧力信号を処理するＣＰＵ４と、ＣＰＵ４で処理した圧力信号を車両側ユニット２に送信する送信手段５と、圧力センサ３、ＣＰＵ４及び送信手段５に電力を供給する電源（電池）６を備えている。送信手段５はＲＦ回路７とアンテナ８から構成されている。圧力センサ３、処理手段４、送信手段５、及び電源６はケース内に収容され、図２に示すように、バンド等によりタイヤＴを取り付けたホイールのリムＲなどに固定されるようになっている。   The tire side unit 1 includes a pressure sensor 3 that detects an air pressure in a cavity of a tire mounted on the vehicle, a CPU 4 that processes a pressure signal detected by the pressure sensor 3, and a pressure signal that is processed by the CPU 4 And a power source (battery) 6 for supplying power to the pressure sensor 3, the CPU 4, and the transmission unit 5. The transmission means 5 includes an RF circuit 7 and an antenna 8. The pressure sensor 3, the processing means 4, the transmission means 5, and the power source 6 are housed in a case, and are fixed to a rim R of a wheel to which a tire T is attached, as shown in FIG. Yes.

車両側ユニット２は、アンテナ８から送信された圧力信号を受信するアンテナ９とＲＦ回路１０を備えた受信手段１１、この受信手段１１から入力された圧力信号を処理するＣＰＵ（処理手段）１２、検出した圧力を表示する表示手段を含む表示回路１３、警報を発する警報手段１４、及び車両のイグニッション（点火装置）のオン・オフを検出するイグニッションセンサを含む電源監視回路１５を備えている。   The vehicle-side unit 2 includes an antenna 9 for receiving a pressure signal transmitted from the antenna 8 and a receiving means 11 having an RF circuit 10, a CPU (processing means) 12 for processing the pressure signal input from the receiving means 11, A display circuit 13 including a display means for displaying the detected pressure, an alarm means 14 for issuing an alarm, and a power supply monitoring circuit 15 including an ignition sensor for detecting on / off of the ignition (ignition device) of the vehicle are provided.

このイグニッションセンサを含む電源監視回路１５は、車両のエンジンがオフになっているか否か、即ち運転者が車両を離れて駐車状態になっているか否かを検出するためのものである。 The power supply monitoring circuit 15 including the ignition sensor is for detecting whether or not the vehicle engine is turned off, that is, whether or not the driver leaves the vehicle and is parked .

アンテナ９は、図２に示すように、樹脂製のアンテナケース１６内に収容され、図示する例ではタイヤＴに対面する車体部分１７に取り付るようにしているが、タイヤ側ユニット１のアンテナ８からの電波を受信可能であれば、いずれの場所に設置してもよい。   As shown in FIG. 2, the antenna 9 is housed in a resin antenna case 16 and is attached to a vehicle body portion 17 facing the tire T in the illustrated example. As long as the radio wave from 8 can be received, it may be installed in any location.

警報手段１４は、圧力センサ３により検出したタイヤＴの空気圧の単位時間当たりの減少量が所定量以上になった際に警報を発するもので、作動信号がＣＰＵ１２から入力されると、音や光などの警報を発生する。   The alarm means 14 issues an alarm when the decrease amount per unit time of the air pressure of the tire T detected by the pressure sensor 3 exceeds a predetermined amount. When an operation signal is input from the CPU 12, a sound or light An alarm is generated.

ＣＰＵ１２は、受信手段１１から入力された圧力信号をデジタル化処理し、電源監視回路１５によりイグニッションがオンであることを検出した場合、即ち車両のエンジンがオンの状態にある場合、表示手段に検出した圧力を表示させるようになっている。   The CPU 12 digitizes the pressure signal input from the receiving means 11 and detects it on the display means when the power supply monitoring circuit 15 detects that the ignition is on, that is, when the vehicle engine is on. The displayed pressure is displayed.

他方、電源監視回路１５によりイグニッションがオフであることを検出した場合、即ち車両のエンジンがオフの状態にある場合にのみ、圧力センサ３で検出した圧力信号の値の単位時間当たりの減少量を逐次算出し、この減少量の値が予め設定した閾値以上になったか否か判定する。閾値以上になったと判定すると、警報手段１４をオンにするための作動信号を警報手段１４に出力する。   On the other hand, when the power supply monitoring circuit 15 detects that the ignition is off, that is, only when the vehicle engine is off, the amount of decrease per unit time in the value of the pressure signal detected by the pressure sensor 3 is calculated. It is sequentially calculated, and it is determined whether or not the value of the decrease amount is equal to or greater than a preset threshold value. When it is determined that the threshold value is exceeded, an operation signal for turning on the alarm unit 14 is output to the alarm unit 14.

ここで使用する閾値としては、上記所定量が１〜１０ｋＰａ／ｓとなる値を好ましく用いることができる。その理由は、タイヤＴに空気を充填するバルブから空気を抜くと、単位時間当たりの減圧量が、タイヤサイズにより異なるが、略１〜１０ｋＰａ／ｓの範囲にあるからである。閾値（所定量）は、タイヤサイズに応じて適宜設定される。   As the threshold used here, a value at which the predetermined amount is 1 to 10 kPa / s can be preferably used. The reason is that when the air is extracted from the valve that fills the tire T with air, the amount of pressure reduction per unit time is in the range of approximately 1 to 10 kPa / s, although it varies depending on the tire size. The threshold (predetermined amount) is appropriately set according to the tire size.

上記タイヤ空気圧監視装置は、圧力センサ３で検出された圧力信号を送信手段５から受信手段１１を介してＣＰＵ１２に入力する。ＣＰＵ１２は、電源監視回路１５からイグニッションがオフであることを示す信号を受け取る、即ちエンジンがオフの駐車時に、受信手段１１から入力された圧力信号をデジタル化処理して、その圧力値の単位時間当たりの減少量の値が予め設定した閾値以上になったか否か判定する。減少量の値が閾値以上であると判定すると、警報手段１４に作動信号を出力する。警報手段１４は作動信号が入力されると、警報を発生する。   The tire pressure monitoring device inputs the pressure signal detected by the pressure sensor 3 from the transmission means 5 to the CPU 12 via the reception means 11. The CPU 12 receives a signal indicating that the ignition is off from the power supply monitoring circuit 15, that is, when the engine is parked off, the pressure signal input from the receiving means 11 is digitized, and the pressure value unit time It is determined whether or not the value of the winning reduction amount is equal to or greater than a preset threshold value. When it is determined that the value of the decrease amount is equal to or greater than the threshold value, an operation signal is output to the alarm means 14. The alarm means 14 generates an alarm when an operation signal is input.

他方、ＣＰＵ１２は、電源監視回路１５からイグニッションがオンであることを示す信号を受け取る、即ちエンジンがオンの車両作動時に、受信手段１１から入力された圧力信号をデジタル化処理して表示回路１３に出力し、表示回路１３は入力された圧力信号の値、即ち圧力センサ３により検出したタイヤＴの空気圧を不図示の表示手段にデジタル表示する。   On the other hand, the CPU 12 receives a signal indicating that the ignition is on from the power supply monitoring circuit 15, that is, when the engine is on, the pressure signal input from the receiving means 11 is digitized and displayed on the display circuit 13. The display circuit 13 digitally displays the value of the input pressure signal, that is, the air pressure of the tire T detected by the pressure sensor 3 on a display means (not shown).

上述した本発明によれば、駐車時にタイヤＴの空気をバルブから抜いて、ホイールやタイヤＴを盗もうとしても、圧力センサ３で検出したタイヤＴの空気圧の単位時間当たりの減少量が所定量以上になった際に警報を発する警報手段１４を具備するので、タイヤＴの空気をバルブから抜いた際に警報手段１４が警報を発し、ホイールやタイヤの盗難を防止することができる。   According to the present invention described above, the amount of decrease in the air pressure of the tire T detected by the pressure sensor 3 per unit time is a predetermined amount even if the air of the tire T is removed from the valve during parking and the wheel or the tire T is stolen. Since the alarm means 14 which issues an alarm when it becomes above is provided, when the air of the tire T is extracted from the valve, the alarm means 14 issues an alarm, and the wheel or tire can be prevented from being stolen.

また、タイヤＴがアイスピック等により刺されて空気を故意に抜かれた際にも警報手段１４が警報を発することが可能になるので、残りのタイヤが被害に遭うのを防ぐことができ、従って、ホイールやタイヤの盗難や空気を故意に抜く愉快犯等の犯罪に対して抑制効果を発揮するタイヤ空気圧監視装置の提供が可能になる。   Further, since the alarm means 14 can issue an alarm even when the tire T is stabbed with an ice pick or the like and the air is deliberately extracted, the remaining tire can be prevented from being damaged. It is possible to provide a tire pressure monitoring device that exerts a suppression effect on crimes such as theft of wheels and tires and pleasant crimes such as deliberately removing air.

上述した図１に示す構成を有するタイヤ空気圧監視装置が、圧力センサ３等の部品を兼用しながら、車両走行時のタイヤＴの空気圧も監視できるのでよい。 Tire pressure monitoring apparatus having the configuration shown in FIG. 1 described above predicate is while also serves as a component such as a pressure sensor 3, good because air pressure of the tire T when the vehicle traveling can also be monitored.

本発明のタイヤ空気圧監視装置の一実施形態を示すブロック図である。It is a block diagram which shows one Embodiment of the tire pressure monitoring apparatus of this invention. タイヤ側ユニットをタイヤ内のリムに装着した状態を示す説明図である。It is explanatory drawing which shows the state which mounted | wore the rim in a tire with the tire side unit.

符号の説明Explanation of symbols

１ タイヤ側ユニット
２ 車両側ユニット
３ 圧力センサ
１２ ＣＰＵ（処理手段）
１３ 表示回路
１４ 警報手段
１５ 電源監視回路
Ｒ リム
Ｔ タイヤ DESCRIPTION OF SYMBOLS 1 Tire side unit 2 Vehicle side unit 3 Pressure sensor 12 CPU (processing means)
13 Display Circuit 14 Alarm Means 15 Power Monitoring Circuit R Rim T Tire

Claims (4)

車両に装着されたタイヤの空気圧を検出する圧力センサと、前記車両のイグニッションのオン・オフを検出するイグニッションセンサと、前記圧力センサが検出した圧力信号及び前記イグニッションセンサが検出した信号を処理する処理手段と、警報を発生する警報手段と、前記タイヤの空気圧を表示可能な表示手段とを備え、
前記処理手段は、
前記イグニッションセンサから前記イグニッションがオフであることを示す信号を受け取った場合には、前記圧力センサから入力された圧力信号を処理して前記タイヤの空気圧の単位時間当たりの減少量の値が予め設定した閾値以上であるか否かを判定すると共に、その閾値以上であると判定した場合には、前記警報手段に作動信号を出力し、
前記イグニッションセンサから前記イグニッションがオンであることを示す信号を受け取った場合には、前記圧力センサから入力された圧力信号を処理して前記タイヤの空気圧を前記表示手段に表示させる、タイヤ空気圧監視装置。 A pressure sensor for detecting the air pressure of a tire mounted on the vehicle, an ignition sensor for detecting on / off of the ignition of the vehicle, a process for processing a pressure signal detected by the pressure sensor and a signal detected by the ignition sensor Means, alarm means for generating an alarm, and display means capable of displaying the tire air pressure,
The processing means includes
When a signal indicating that the ignition is off is received from the ignition sensor, the pressure signal input from the pressure sensor is processed to set a value of a decrease amount per unit time of the tire air pressure in advance. When it is determined whether or not it is greater than or equal to the threshold value, if it is determined that it is greater than or equal to the threshold value, an operation signal is output to the alarm means,
A tire air pressure monitoring device that processes the pressure signal input from the pressure sensor and displays the tire air pressure on the display means when a signal indicating that the ignition is on is received from the ignition sensor. . 前記圧力センサが検出した圧力信号を送信する送信手段と、前記送信手段から送信された圧力信号を受信して前記処理手段に入力する受信手段とを備えた請求項１に記載のタイヤ空気圧監視装置。The tire pressure monitoring device according to claim 1, further comprising: a transmission unit that transmits a pressure signal detected by the pressure sensor; and a reception unit that receives the pressure signal transmitted from the transmission unit and inputs the pressure signal to the processing unit. . 前記圧力センサ及び送信手段を前記タイヤに取り付ける一方で、前記受信手段、イグニッションセンサ、処理手段、警報手段及び表示手段を前記車両に取り付けた請求項２に記載のタイヤ空気圧監視装置。The tire pressure monitoring device according to claim 2, wherein the pressure sensor and the transmission unit are attached to the tire, and the reception unit, the ignition sensor, the processing unit, the alarm unit, and the display unit are attached to the vehicle. 前記閾量が１〜１０ｋＰａ／ｓである請求項１〜３のいずれかに記載のタイヤ空気圧監視装置。 Tire pressure monitoring device according to any one of claims 1-3 wherein the threshold amount is 1~10kPa / s.
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