JP2538986Y2 - Tire pressure warning system - Google Patents
Tire pressure warning systemInfo
- Publication number
- JP2538986Y2 JP2538986Y2 JP3179191U JP3179191U JP2538986Y2 JP 2538986 Y2 JP2538986 Y2 JP 2538986Y2 JP 3179191 U JP3179191 U JP 3179191U JP 3179191 U JP3179191 U JP 3179191U JP 2538986 Y2 JP2538986 Y2 JP 2538986Y2
- Authority
- JP
- Japan
- Prior art keywords
- tire pressure
- transmitter
- warning system
- tire
- transmitted
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
- B60C23/0433—Radio signals
- B60C23/0447—Wheel or tyre mounted circuits
- B60C23/0455—Transmission control of wireless signals
- B60C23/0464—Transmission control of wireless signals to avoid signal interference
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring Fluid Pressure (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、無線を利用したタイヤ
空気圧警報システムに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire pressure alarm system using radio waves.
【０００２】[0002]
【従来の技術】従来から、自動車用タイヤ空気圧の適否
を車室内で確認するのに、無線方式のタイヤ空気圧警報
システムが用いられている。そして、タイヤ空気圧の適
否を検知し、その情報を無線で車体側に伝えるために送
信機が各タイヤに装着されている。また、送信機から
は、タイヤ空気圧が正常時には断続した一定パターンの
信号を送信し、異常時には連続信号を送信している。2. Description of the Related Art Conventionally, a wireless tire pressure alarm system has been used to confirm the suitability of tire pressure for automobiles in a vehicle cabin. A transmitter is mounted on each tire to detect whether the tire pressure is appropriate and to transmit the information wirelessly to the vehicle body. Further, the transmitter transmits an intermittent constant pattern signal when the tire pressure is normal, and transmits a continuous signal when the tire pressure is abnormal.
【０００３】この送信に際しては、複数個の送信機から
送信される信号を確実に受信するために、各送信機ごと
にそれぞれ異なった周波数で変調をかけることにより、
受信機が断続した一定パターンの信号を受信した場合に
は正常圧と判断し、連続信号を受信した場合には異常圧
と判断している。また、信号が全く受信されない場合
は、送信機自体の異常と判断している。また、タイヤ側
と車体側の両方に送受信機能を持たせ、必要な時に、必
要なタイヤの情報のみ呼び出す方法もとられている。At the time of transmission, in order to reliably receive signals transmitted from a plurality of transmitters, modulation is performed at different frequencies for each of the transmitters.
When the receiver receives an intermittent signal of a constant pattern, it is determined that the pressure is normal, and when it receives a continuous signal, it is determined that the pressure is abnormal. If no signal is received, it is determined that the transmitter itself is abnormal. Also, a method has been proposed in which both the tire side and the vehicle body side have transmission / reception functions, and only necessary tire information is called up when necessary.
【０００４】[0004]
【考案が解決しようとする課題】しかし、このような従
来の技術においては、各送信機ごとに異なった周波数で
変調をかけた送信信号を、一つの受信機で受信するため
には、それぞれ異なった周波数すべてを処理できる高周
波増幅器と、各周波数に対する局部発信器が必要とな
り、受信機側回路が複雑になるという問題点があった。
また、タイヤ側に送受信機能を持たせるには、かなり大
型化し、重量もアップするため、タイヤに装着するには
きわめて困難であった。However, in such a conventional technique, in order for a single receiver to receive a transmission signal modulated at a different frequency for each transmitter, different transmission signals are required. However, there is a problem that a high-frequency amplifier capable of processing all the frequencies and a local oscillator for each frequency are required, and the circuit on the receiver side becomes complicated.
Also, in order for the tire side to have a transmission / reception function, it is extremely difficult to mount it on a tire because the size and weight are considerably increased.
【０００５】[0005]
【課題を解決するための手段】本考案のタイヤ空気圧警
報システムは、タイヤ空気圧情報を車体側に無線で伝え
るタイヤ空気圧警報システムにおいて、タイヤ空気圧正
常時に送信機から送信する信号を、同一周波数で変調さ
れた非同期信号で、それぞれ異なる素数周期で送信させ
る送信機とし、該送信機を検出すべきタイヤに装着する
とともに、前記非同期信号を受信し、コードを識別する
受信機を車体側に設けたことを特徴とするものである。A tire pressure alarm system according to the present invention is a tire pressure alarm system for wirelessly transmitting tire pressure information to a vehicle body, wherein a signal transmitted from a transmitter when tire pressure is normal is modulated at the same frequency. Transmitters for transmitting the asynchronous signals with different prime periods, respectively, the transmitters are mounted on tires to be detected, and a receiver for receiving the asynchronous signals and identifying a code is provided on the vehicle body side. It is characterized by the following.
【０００６】[0006]
【実施例】以下、本考案の実施例を図面に基づいて詳細
に説明する。図１は、本考案のタイヤ空気圧警報システ
ムの構成図であり、図２は、本考案の送信信号パターン
図である。送信機１、送信機２、送信機３、送信機４
は、それぞれ４本のタイヤに装着され、タイヤ空気圧が
正常圧時には、図２で示すパターンでそれぞれ送信し、
異常圧時には、連続信号を送信できるようになってい
る。また、送信機自体に異常をきたした時には、信号を
全く送信しないようになっている。受信機５は、前記の
送信機１〜４からそれぞれ送信される信号を受信し処理
するもので車体側に設けられ、該受信機５の処理結果を
もとに運転者にタイヤ空気圧の適否を知らせる表示装置
６は、車室内の運転席に設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram of the tire pressure warning system of the present invention, and FIG. 2 is a transmission signal pattern diagram of the present invention. Transmitter 1, Transmitter 2, Transmitter 3, Transmitter 4
Are mounted on four tires respectively, and when the tire pressure is normal, each is transmitted in the pattern shown in FIG.
At the time of abnormal pressure, a continuous signal can be transmitted. Further, when an abnormality occurs in the transmitter itself, no signal is transmitted. The receiver 5 receives and processes signals transmitted from the transmitters 1 to 4 and is provided on the vehicle body. The receiver 5 determines whether the tire pressure is appropriate based on the processing result of the receiver 5. The display device 6 for notifying is provided in the driver's seat in the vehicle compartment.
【０００７】そして、前記の送信機１〜４から送信され
る信号は、同一周波数で変調された非同期信号で、それ
ぞれ異なる素数周期で送信できるようになっている。図
２は、タイヤ空気圧の正常時に送信される信号パターン
を示す図である。送信機１は、ａコードを５個連続出力
するパルスを３秒周期で４パルス２分ごとに送信し、送
信機２も同様に、ｂコードを５個連続出力するパルスを
５秒周期で４パルス２分ごとに送信し、送信機３は、ｃ
コードを５個連続出力するパルスを７秒周期で４パルス
２分ごとに送信し、送信機４は、ｄコードを５個連続出
力するパルスを１１秒周期で４パルス２分ごとに送信す
る。The signals transmitted from the transmitters 1 to 4 are asynchronous signals modulated at the same frequency and can be transmitted at different prime periods. FIG. 2 is a diagram showing a signal pattern transmitted when the tire pressure is normal. The transmitter 1 transmits a pulse for continuously outputting five a-codes every three minutes for four pulses every two minutes, and the transmitter 2 similarly outputs four pulses for continuously outputting five b-codes every five seconds. The pulse is transmitted every 2 minutes, and the transmitter 3 outputs c
A pulse for continuously outputting five codes is transmitted every two minutes for four pulses every seven seconds, and the transmitter 4 transmits a pulse for continuously outputting five d codes every two minutes for every four pulses every 11 seconds.
【０００８】従って、前記４つの送信パターンにより、
２分間隔で、ａ，ｂ，ｃ，ｄコードが受信機５により検
出されれば、各４本のタイヤ空気圧は正常であると判断
し、仮にａコードが連続に検出されれば、ａコードを送
信する送信機１が装着されているタイヤ空気圧は異常で
あると判断し、ａコードが全く検出されなければ、ａコ
ードを送信する送信機１自体の異常と判断し、表示装置
６によって運転者に警告することができる。なお、本例
では、異常圧時に連続送信する例で示したが、異常圧時
も送信機異常時と同様に全く送信させなうようにすれ
ば、システムの簡素化を図ることができる。このように
構成することにより、各コードの発信パルス４個のう
ち、必ず１パルス以上は重なりあうことなく受信でき
る。Therefore, according to the four transmission patterns,
If the a, b, c, and d codes are detected by the receiver 5 at two-minute intervals, it is determined that the tire pressures of the four tires are normal. If the a codes are continuously detected, the a code is determined. Is determined to be abnormal, and if no a code is detected, it is determined that the transmitter 1 itself transmitting the a code is abnormal, and the display device 6 operates Can be warned. In this example, continuous transmission is performed at the time of abnormal pressure. However, if transmission is not performed at all at the time of abnormal pressure as well as at the time of transmitter abnormality, the system can be simplified. With this configuration, of the four transmission pulses of each code, one or more pulses can always be received without overlapping.
【０００９】[0009]
【考案の効果】以上述べてきたように、本考案は、同一
周波数で変調かけた４種類のコードを混信しないパター
ンで送信することにより、受信機側回路が簡単に構成で
き、送信機側も小型化がはかれることで、実用的効果が
大なるものである。As described above, according to the present invention, by transmitting four types of codes modulated at the same frequency in a pattern that does not cause interference, the circuit on the receiver side can be easily configured, and the transmitter side can be constructed. Practical effects are enhanced by miniaturization.
【図１】 本考案のタイヤ空気圧警報システムの構成
図。FIG. 1 is a configuration diagram of a tire pressure warning system of the present invention.
【図２】 本考案の送信信号パターン図。FIG. 2 is a transmission signal pattern diagram of the present invention.
１ 送信機。 ２ 送信機。 ３ 送信機。 ４
送信機。５ 受信機。６ 表示装置。1 Transmitter. 2 Transmitter. 3 Transmitter. 4
Transmitter. 5 Receiver. 6 Display device.
Claims (1)
るタイヤ空気圧警報システムにおいて、タイヤ空気圧正
常時に送信機から送信する信号を、同一周波数で変調さ
れた非同期信号で、それぞれ異なる素数周期で送信させ
る送信機とし、該送信機を検出すべきタイヤに装着する
とともに、前記非同期信号を受信し、コードを識別する
受信機を車体側に設けたことを特徴とするタイヤ空気圧
警報システム。1. A tire pressure warning system for transmitting tire pressure information to a vehicle body wirelessly, wherein a signal transmitted from a transmitter when tire pressure is normal is transmitted as an asynchronous signal modulated at the same frequency at different prime cycles. A tire pressure warning system comprising a transmitter mounted on a tire to be detected, a receiver for receiving the asynchronous signal and identifying a code, provided on a vehicle body side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3179191U JP2538986Y2 (en) | 1991-04-08 | 1991-04-08 | Tire pressure warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3179191U JP2538986Y2 (en) | 1991-04-08 | 1991-04-08 | Tire pressure warning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0513802U JPH0513802U (en) | 1993-02-23 |
| JP2538986Y2 true JP2538986Y2 (en) | 1997-06-18 |
Family
ID=33156455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3179191U Expired - Fee Related JP2538986Y2 (en) | 1991-04-08 | 1991-04-08 | Tire pressure warning system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2538986Y2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996015003A1 (en) * | 1994-11-14 | 1996-05-23 | The Yokohama Rubber Co., Ltd. | Tire pressure monitoring apparatus for vehicles |
| JP3499470B2 (en) | 1998-12-25 | 2004-02-23 | トヨタ自動車株式会社 | Wheel state related information supply device and tire abnormality state notification device |
| JP3510164B2 (en) | 1999-10-06 | 2004-03-22 | トヨタ自動車株式会社 | Wheel state information supply device and wheel state information supply / reception device |
| DE60325231D1 (en) * | 2002-08-30 | 2009-01-22 | Bridgestone Corp | MONITORING SYSTEM FOR ONE WHEEL CONDITION |
| US7817023B2 (en) * | 2004-12-15 | 2010-10-19 | The Yokohama Rubber Co., Ltd. | Wheel information acquiring system |
| JP4341559B2 (en) | 2005-01-26 | 2009-10-07 | トヨタ自動車株式会社 | Wheel information processing device |
| JP2006242707A (en) * | 2005-03-02 | 2006-09-14 | Denso Corp | Tire air pressure detection device |
| JP4562644B2 (en) | 2005-11-29 | 2010-10-13 | カルソニックカンセイ株式会社 | Tire pressure monitoring device |
-
1991
- 1991-04-08 JP JP3179191U patent/JP2538986Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0513802U (en) | 1993-02-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |