JP2000062419A - Tire air pressure detection transmitter - Google Patents
Tire air pressure detection transmitterInfo
- Publication number
- JP2000062419A JP2000062419A JP10237859A JP23785998A JP2000062419A JP 2000062419 A JP2000062419 A JP 2000062419A JP 10237859 A JP10237859 A JP 10237859A JP 23785998 A JP23785998 A JP 23785998A JP 2000062419 A JP2000062419 A JP 2000062419A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- transmission
- tire
- microcomputer
- data
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 67
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
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
- 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
-
- 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
- B60C23/0461—Transmission control of wireless signals externally triggered, e.g. by wireless request signal, magnet or manual switch
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】この発明は、タイヤ空気圧検
出送信機で、更に詳しくは、電池寿命を伸ばすことを可
能にしたタイヤ空気圧検出送信機に関するものである。
【０００２】
【従来の技術】従来から、電池内蔵型のタイヤ空気圧検
出送信機があった。図２に示すように、このタイヤ空気
圧検出送信機１は、電池７と組み合わせた時点から、マ
イコン２が動作を始めるように設計されている。それ
は、このような装置の場合には、通常マイコン２も電池
７も回路基板も、いっしょに組み合わされてモールド
し、一つのケースに収めるように構成されているため
に、後からマイコン２のリセット端子等を制御して、マ
イコン２の再起動をかけるということができず、そのた
め、電池７と組み合わせた時点で、マイコン２のシステ
ムが起動するようにせざるを得なかった。そして、電池
と共にモールドされたマイコン２は、その時点から圧力
センサで検出されたデータを計測し、定期的に送信回路
５からアンテナ６をへて、圧力計測データを送信するよ
うに制御されていた。
【０００３】
【発明が解決しようとする課題】しかしながら、このよ
うにして構成されているタイヤ空気圧検出送信機は、製
造組み立て完了後、実際にタイヤに装着されるまでの期
間は、タイヤ空気圧検出送信機単体で倉庫に保管される
だけであるにもかかわらず、圧力計測はもとより、その
計測データの送信も定期的に行っていた。従って、保管
期間にも、定期的に圧力データの送信をおこなっている
ため、保管期間においてもタイヤに装着時と同等の電池
の消耗が発生するという問題点があった。このため、タ
イヤ空気圧検出送信機の連続使用期間に保管期間も含ま
れることになり、保管期間が長いと、その期間分だけ、
実際のタイヤに取り付けてからの連続使用期間が短くな
り、つまり、タイヤ空気圧検出送信機の寿命が短くな
り、利用者からの不満を誘起する要因となりかねない。
そこで、本発明は、タイヤ空気圧検出機本体の時には、
圧力データを送信しないというタイヤ空気圧検出機を提
供することを目的としたものであります。
【０００４】
【課題を解決するための手段】前述した目的を達成する
ために、本発明の請求項1記載の発明は、電池を電源と
して利用し、圧力を計測する圧力センサと、圧力センサ
に一定間隔で圧力の計測指示を出しすマイコンと、マイ
コンから一定間隔で送出される圧力データを送信波形に
変換する送信回路と、送信回路で変換された送信波形を
外部に送信する送信アンテナとで構成され、タイヤ内部
に取り付けることにより、車が走行中のタイヤ内部の圧
力データを定期的に送信することタイヤ空気圧検出送信
機において、計測された圧力が設定圧力である状態を計
測する毎にカウントアップされ、さらに計測された圧力
が設定圧力でない場合にはそれまでカウントされたデー
タをリセットされるように制御される気圧計測カウンタ
を構成要素とし、前記の気圧計測カウンタが、あらかじ
め設定されている計測カウント数に達した場合には、マ
イコンから出力される送信要求信号と前記気圧計測カウ
ンタのオーバーフロー信号の反転信号を入力とするＡＮ
Ｄ回路を構成要素とすることにより、計測された圧力が
設定圧力である状態が一定期間継続した場合には、それ
以後の送信制御を停止し、電池の寿命を延ばすことで、
問題解決の手段とするものである。
【０００５】
【発明の実施の形態】以下、本発明の実施例の形態を図
示例と共に説明する。図１は、本発明のタイヤ空気圧検
出送信機の構成図を示す。図２は、従来のタイヤ空気圧
検出送信機の構成図を示す。図３は、本発明のカウント
制御フローチャートである。
【０００６】図１において、タイヤ空気圧検出送信機１
は、圧力センサ３で圧力を計測し、一定期間ごとに送信
回路５を経由してデータをアンテナ６より送信する。
【０００７】タイヤ空気圧検出送信機１内部のマイコン
２は一定期間ごとに（たとえば１５秒ごと）、圧力セン
サ３から圧力データを入手する。そのデータはマイコン
２の内部にて計算され、前回の計測圧力データと今回の
計測圧力データ値との差が、あらかじめ設定されている
圧力変動値以下であれば、次の計測期間まで、マイコン
２自ら低消費電力モード（通常、スリープモードと呼ば
れる）になり、電池４の消費を極力おさえるように設計
されている。この一定間隔ごとに実施される圧力計測を
一定回数実施すると、その時に計測された圧力データを
送信回路５に出力し、送信アンテナ６を経由して受信機
（図を省略）へデータを送信する。これは通常定期送信
と呼ばれる。
【０００８】ところで、タイヤ空気圧検出送信機は本来
タイヤに実際に装着されて、車が走行状態になってはじ
めて利用価値が発生するものである。通常、タイヤ空気
圧検出送信機は、保管時にはタイヤに装着したまま保管
する必要はなく、タイヤ空気圧検出送信機単体で、保管
倉庫、棚などに保管するのが常であると考えられる。し
たがって、通常の保管時に、計測された圧力は常時一定
の大気圧となる。
【０００９】
【実施例】図１に今回の発明によるタイヤ空気圧検出送
信機の概要を示す。例として設定圧力を１気圧±０．２
気圧とする。この図によると、マイコン２から指示を受
けて圧力計測をおこなう圧力センサ３の計測データが、
１気圧近傍である場合には、マイコン２からカウント信
号７を圧力の計測ごとに今回の発明で構成要素に加えた
１気圧検出カウンタ８に出力し、気圧計測カウンタ８が
あらかじめ設定されたカウント値に達した場合に、気圧
計測カウンタ８から出力されているカウントオーバー反
転信号９が“Ｌ”となり、マイコン２から送信要求信号
１０が“Ｈ”となって出力されても、ＡＮＤ回路１１の
出力が“Ｌ”（ＯＦＦ状態）となり、結果として送信要
求信号１０の情報が送信回路５に伝達されず、送信制御
はおこなわれないことになる。この場合、タイヤ空気圧
検出送信機は保管状態であり、それ以後の定時送信を一
時停止する、いわゆる定期送信停止モードとなる。
【００１０】つぎに、計測された圧力データが設定圧力
範囲内の値でない場合には、その都度マイコン２からリ
セット信号１２が出力されるので気圧計測カウンタ８は
リセットされ、それまでカウントされていた数値は０に
リセットされる。このため、気圧計測カウンタ８から出
力されているカウントオーバ反転信号９は“Ｌ”から
“Ｈ”となる。この場合には、マイコン２から送信要求
信号１０が“Ｈ”となって出力されると、ＡＮＤ回路１
１の出力が“Ｈ”（ＯＮ状態）となり、送信要求信号１
０の情報がそのまま送信回路５に伝達されることにな
り、送信制御がおこなわれることになる。
【００１１】次に今回の発明の制御を図３にて説明す
る。マイコン２からの送信要求が発生する（Ｓ２）と、
計測圧力が設定圧力範囲内にあるかの判定を実施し（Ｓ
４）、範囲外であれば気圧計測カウンタをクリアし（Ｓ
３）、マイコン２からの要求通り送信制御を実施する
（Ｓ８）。そして、以後も送信制御を実施するように送
信停止フラグをクリアする（Ｓ９）。もしステートＳ４
において計測圧力が設定範囲内であればさらに送信停止
中であるかの確認（Ｓ５）をおこなう。そして、送信停
止中であれば送信を実施しないで、次回の送信要求まで
待つために定期送信タイマをクリアする（Ｓ１０）。も
しステートＳ５において送信停止中でないならば、気圧
計測カウンタをインクリメントする（Ｓ６）。そしてカ
ウントデータがオバーフローするかしないかの判定をお
こなう（Ｓ７）。そしてオーバーフローした場合には、
送信制御を停止するモードに移行するために送信停止中
設定をおこない（Ｓ１１）、これ以後、マイコン２から
の送信要求が発生しても送信制御を実施しないようにす
る。このように制御することにより、設定圧力が一定回
数計測することにより、送信停止モードとすることが可
能となり、不必要な送信制御を実施しなくなる。また、
設定範囲外の圧力を計測することで、ただちに通常の送
信制御を実施するモードに移行することになり、タイヤ
空気圧検出送信機としての機能を有する状態となる。
【００１２】この状態は、本発明のタイヤ空気圧検出送
信機がタイヤに装着された場合を想定していると考えて
よい。なぜならば、タイヤ内部の圧力は大気圧より、お
よそ３倍程度高いために、タイヤ空気圧検出送信機１を
タイヤ内部に装着した場合には、計測時に設定圧力であ
る１気圧以外の圧力データを計測すると予想できるから
である。
【００１３】前述したように、保管期間中に送信制御は
行なわれなくなり、電池寿命を大幅に延ばすことが可能
となる。今回の測定結果を例にとると、電源として１０
００ｍＡｈの電池を利用した場合、１回の送信に消費す
る電流は１ｍＡ秒、また１回の圧力の計測を実施するの
に消費する電流は０．００７ｍＡ秒、ここで、電池有効
利用率５０％、定期送信が１０分、検出器間を１５秒と
した場合に、約１５年もつことになるが、従来のタイヤ
空気圧検出送信機の場合は、保管時でも通常の送信を実
施しているために、製造後に倉庫などでの保管期間を１
年と考えると、実際の利用期間は１４年となる。
【００１４】今回の発明によれば保管期間中は圧力検出
のみ実施するために消費電流も少なくなり、保管期間１
年間の消費電流の合計は、わずか４ｍＡｈ程度におさま
るため、タイヤ装着後の定期送信期間は約１４．９年と
なり、従来の方法にくらべ１年近くも利用期間を延ばす
ことができる。これは保管状態では、消費電流がきわめ
て少ない計測制御のみが実施され、タイヤに装着された
時点になってから消費電流の多い送信制御を実施するこ
とになるからである。
【００１５】
【発明の効果】以上のように、本発明によればタイヤ空
気圧検出送信機を保管している間は、むだな送信を停止
するように構成されているので、従来のタイヤ空気圧検
出送信機と比較して、保管時の電池の消耗を大幅に節約
でき、その実用性は非常に大きい。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire pressure detection transmitter, and more particularly to a tire pressure detection transmitter capable of extending battery life. . 2. Description of the Related Art Conventionally, there has been a tire pressure detection transmitter with a built-in battery. As shown in FIG. 2, the tire pressure detection transmitter 1 is designed so that the microcomputer 2 starts operating when combined with the battery 7. In the case of such an apparatus, the microcomputer 2, the battery 7 and the circuit board are usually combined together and molded so as to be housed in one case. It was not possible to restart the microcomputer 2 by controlling the terminals and the like, so that when the battery 7 was combined, the system of the microcomputer 2 had to be started. The microcomputer 2 molded together with the battery measures the data detected by the pressure sensor from that time, and is controlled to periodically transmit the pressure measurement data from the transmission circuit 5 to the antenna 6. . [0003] However, the tire pressure detection transmitter constructed as described above has a tire pressure detection and transmission time period from the completion of manufacture and assembly until the tire is actually mounted on a tire. Although it was only stored in a warehouse by itself, it not only measured the pressure but also periodically transmitted the measurement data. Therefore, since pressure data is transmitted periodically during the storage period, there is a problem that even in the storage period, the same battery consumption occurs as when the tire is mounted. For this reason, the storage period is also included in the continuous use period of the tire pressure detection transmitter, and if the storage period is long, only the period,
The continuous use period after mounting on the actual tire is shortened, that is, the life of the tire pressure detection transmitter is shortened, which may be a factor that may cause user dissatisfaction.
Therefore, the present invention, when the tire pressure detector body,
The purpose is to provide a tire pressure detector that does not transmit pressure data. [0004] In order to achieve the above-mentioned object, an invention according to claim 1 of the present invention uses a battery as a power supply and measures a pressure sensor for measuring pressure, and a pressure sensor for measuring pressure. A microcomputer that issues pressure measurement instructions at regular intervals, a transmission circuit that converts pressure data sent from the microcomputer at regular intervals into a transmission waveform, and a transmission antenna that transmits the transmission waveform converted by the transmission circuit to the outside It is constructed and attached to the inside of the tire to transmit the pressure data inside the tire while the car is running. The tire pressure detection transmitter counts every time the state where the measured pressure is the set pressure is measured. If the measured pressure is not the set pressure, and if the measured pressure is not the set pressure, a barometric pressure measurement counter is controlled to reset the data counted so far. As an element, the air pressure measurement counters, when it reaches the counting count is set in advance, and inputs the inverted signal of the transmission request signal outputted from the microcomputer pressure measurement counter overflow signal AN
When the state where the measured pressure is the set pressure continues for a certain period of time by using the D circuit as a component, the transmission control thereafter is stopped to extend the life of the battery,
It is a means of problem solving. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration diagram of a tire pressure detection transmitter of the present invention. FIG. 2 shows a configuration diagram of a conventional tire pressure detection transmitter. FIG. 3 is a count control flowchart according to the present invention. In FIG. 1, a tire pressure detection transmitter 1 is shown.
Measures the pressure with the pressure sensor 3 and transmits data from the antenna 6 via the transmission circuit 5 at regular intervals. The microcomputer 2 in the tire pressure detection transmitter 1 obtains pressure data from the pressure sensor 3 at regular intervals (for example, every 15 seconds). The data is calculated inside the microcomputer 2. If the difference between the previous measured pressure data and the current measured pressure data value is equal to or less than a preset pressure fluctuation value, the microcomputer 2 calculates the data until the next measurement period. It is designed to be in a low power consumption mode (usually called a sleep mode) by itself and to minimize the consumption of the battery 4. When the pressure measurement performed at regular intervals is performed a fixed number of times, the pressure data measured at that time is output to the transmission circuit 5 and the data is transmitted to a receiver (not shown) via the transmission antenna 6. . This is usually called periodic transmission. [0008] By the way, a tire pressure detection transmitter is originally mounted on a tire, and its usefulness is generated only when the vehicle is in a running state. Usually, it is not necessary to keep the tire pressure detection transmitter attached to the tire at the time of storage, and it is considered that the tire pressure detection transmitter alone is usually stored in a storage warehouse, shelf, or the like. Therefore, during normal storage, the measured pressure is always at a constant atmospheric pressure. FIG. 1 shows an outline of a tire pressure detection transmitter according to the present invention. As an example, set pressure is 1 atm ± 0.2
Pressure. According to this figure, the measurement data of the pressure sensor 3 that performs the pressure measurement in response to the instruction from the microcomputer 2 is:
When the pressure is close to 1 atm, the microcomputer 2 outputs a count signal 7 to the 1 atm detection counter 8 added to the components in the present invention every time the pressure is measured, and the pressure measurement counter 8 sets a preset count value. Is reached, the count-over inversion signal 9 output from the atmospheric pressure measurement counter 8 becomes “L”, and even if the microcomputer 2 outputs the transmission request signal 10 as “H”, the output of the AND circuit 11 Becomes "L" (OFF state), as a result, the information of the transmission request signal 10 is not transmitted to the transmission circuit 5, and the transmission control is not performed. In this case, the tire pressure detection transmitter is in a storage state, and is in a so-called periodic transmission stop mode in which periodic transmission thereafter is temporarily stopped. Next, when the measured pressure data is not a value within the set pressure range, the reset signal 12 is output from the microcomputer 2 each time, so that the atmospheric pressure measurement counter 8 is reset and counted up to that time. The value is reset to zero. Therefore, the count-over inversion signal 9 output from the atmospheric pressure measurement counter 8 changes from “L” to “H”. In this case, when the microcomputer 2 outputs the transmission request signal 10 at “H”, the AND circuit 1
1 becomes "H" (ON state) and the transmission request signal 1
The information of 0 is transmitted to the transmission circuit 5 as it is, and the transmission control is performed. Next, the control of the present invention will be described with reference to FIG. When a transmission request is generated from the microcomputer 2 (S2),
It is determined whether the measured pressure is within the set pressure range (S
4) If it is out of the range, the atmospheric pressure measurement counter is cleared (S
3) Transmission control is performed as requested by the microcomputer 2 (S8). Then, the transmission stop flag is cleared so that the transmission control is performed thereafter (S9). If state S4
If the measured pressure is within the set range, it is further confirmed whether transmission is stopped (S5). Then, if the transmission is stopped, the transmission is not performed, and the periodic transmission timer is cleared to wait for the next transmission request (S10). If the transmission is not stopped in state S5, the atmospheric pressure measurement counter is incremented (S6). Then, it is determined whether or not the count data overflows (S7). And if it overflows,
In order to shift to the mode in which the transmission control is stopped, the transmission stop setting is performed (S11), and thereafter, the transmission control is not performed even if a transmission request from the microcomputer 2 occurs. By performing such control, the transmission stop mode can be set by measuring the set pressure a certain number of times, and unnecessary transmission control is not performed. Also,
By measuring the pressure outside the set range, the mode immediately shifts to the mode in which the normal transmission control is performed, and the state having the function as the tire pressure detection transmitter is obtained. This state may be considered assuming that the tire pressure detection transmitter of the present invention is mounted on a tire. Because the pressure inside the tire is about three times higher than the atmospheric pressure, when the tire pressure detection transmitter 1 is mounted inside the tire, pressure data other than the set pressure of 1 atmosphere is measured at the time of measurement. That is because it can be expected. As described above, transmission control is not performed during the storage period, and the battery life can be greatly extended. Taking this measurement result as an example, 10
When a 00 mAh battery is used, the current consumed for one transmission is 1 mA second, and the current consumed for performing one pressure measurement is 0.007 mA second, where the battery effective utilization rate is 50%. If the regular transmission is 10 minutes and the interval between the detectors is 15 seconds, it will last about 15 years. However, in the case of the conventional tire pressure detection transmitter, normal transmission is performed even during storage. In addition, the storage period in the warehouse etc. after manufacturing is 1
Considering the year, the actual usage period is 14 years. According to the present invention, since only pressure detection is performed during the storage period, the current consumption is reduced.
Since the total current consumption per year is only about 4 mAh, the period of regular transmission after mounting the tire is about 14.9 years, and the use period can be extended by nearly one year compared to the conventional method. This is because, in the storage state, only measurement control with very low current consumption is performed, and transmission control with high current consumption is performed after the tire is mounted on the tire. As described above, according to the present invention, while the tire pressure detection transmitter is stored, useless transmission is stopped, so that the conventional tire pressure detection can be performed. Compared with the transmitter, the battery consumption during storage can be greatly reduced, and its practicality is very large.
【図面の簡単な説明】
【図１】本発明によるタイヤ空気圧検出送信機の概略図
である。
【図２】従来のタイヤ空気圧検出送信機の概略図であ
る。
【図３】本発明のカウント制御フローチャートである。
【符号の説明】
１ タイヤ空気圧検出送信機
２ マイコン
３ 圧力センサ
４ 電池
５ 送信回路
６ アンテナ
７ 気圧計測カウンタ
８ カウントオーバー反転信号
９ 送信要求信号
１０ ＡＮＤ回路
１１ リセット信号BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a tire pressure detection transmitter according to the present invention. FIG. 2 is a schematic diagram of a conventional tire pressure detection transmitter. FIG. 3 is a count control flowchart according to the present invention. [Description of Signs] 1 Tire pressure detection transmitter 2 Microcomputer 3 Pressure sensor 4 Battery 5 Transmission circuit 6 Antenna 7 Barometric pressure measurement counter 8 Count over inversion signal 9 Transmission request signal 10 AND circuit 11 Reset signal
Claims (1)
圧力センサと、圧力センサに一定間隔で圧力の計測指示
を出すマイコンと、マイコンから一定間隔で送出される
圧力データを送信波形に変換する送信回路と、送信回路
で変換された送信波形を外部に送信する送信アンテナと
で構成され、タイヤ内部に取り付けることにより、車が
走行中のタイヤ内部の圧力データを定期的に送信するタ
イヤ空気圧検出送信機において、計測された圧力が設定
圧力である状態を計測する毎にカウントアップされ、さ
らに計測された圧力が設定圧力でない場合にはそれまで
カウントされたデータをリセットされるように制御され
る気圧計測カウンタを構成要素とし、前記の気圧計測カ
ウンタが、あらかじめ設定されている計測カウント数に
達した場合には、マイコンから出力される送信要求信号
と前記気圧計測カウンタのオーバーフロー信号の反転信
号を入力とするＡＮＤ回路を構成要素とすることで、計
測された圧力が設定圧力である状態が一定期間継続した
場合には、それ以後の送信制御を実施しないようにし
て、電池の寿命を延ばすことを特徴としたタイヤ空気圧
検出送信機。Claims: 1. A pressure sensor that measures pressure using a battery as a power supply, a microcomputer that issues a pressure measurement instruction to the pressure sensor at regular intervals, and a pressure that is sent from the microcomputer at regular intervals. It is composed of a transmission circuit that converts data into a transmission waveform and a transmission antenna that transmits the transmission waveform converted by the transmission circuit to the outside. In the tire pressure detection transmitter that transmits the data, the count is incremented every time the measured pressure is at the set pressure, and if the measured pressure is not the set pressure, the data that has been counted up to that point is reset A pressure measurement counter controlled to be controlled is a constituent element, and the pressure measurement counter is a preset measurement count number. When the measured pressure reaches the set pressure, an AND circuit that receives the transmission request signal output from the microcomputer and the inverted signal of the overflow signal of the atmospheric pressure measurement counter as inputs is used as a component. A tire pressure detection transmitter characterized by not performing transmission control after that for a certain period of time to extend the life of the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10237859A JP2000062419A (en) | 1998-08-25 | 1998-08-25 | Tire air pressure detection transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10237859A JP2000062419A (en) | 1998-08-25 | 1998-08-25 | Tire air pressure detection transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000062419A true JP2000062419A (en) | 2000-02-29 |
Family
ID=17021482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10237859A Pending JP2000062419A (en) | 1998-08-25 | 1998-08-25 | Tire air pressure detection transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000062419A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001357482A (en) * | 2000-06-12 | 2001-12-26 | Shikoku Electric Power Co Inc | Measurement control system |
| JP2006224715A (en) * | 2005-02-15 | 2006-08-31 | Yokohama Rubber Co Ltd:The | Tire information transmitting device, and tire information collecting system using it |
| WO2012023379A1 (en) * | 2010-08-18 | 2012-02-23 | 株式会社東海理化電機製作所 | Sensor unit and method for registering sensor unit for tire air pressure monitoring system |
-
1998
- 1998-08-25 JP JP10237859A patent/JP2000062419A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001357482A (en) * | 2000-06-12 | 2001-12-26 | Shikoku Electric Power Co Inc | Measurement control system |
| JP4566342B2 (en) * | 2000-06-12 | 2010-10-20 | 四国電力株式会社 | Measurement control system |
| JP2006224715A (en) * | 2005-02-15 | 2006-08-31 | Yokohama Rubber Co Ltd:The | Tire information transmitting device, and tire information collecting system using it |
| US7348879B2 (en) | 2005-02-15 | 2008-03-25 | The Yokohama Rubber Co., Ltd. | Tire information transmitter and tire information acquisition system using the transmitter |
| US7701326B2 (en) | 2005-02-15 | 2010-04-20 | The Yokohama Rubber Co., Ltd. | Tire information transmitter and tire information acquisition system using the transmitter |
| JP4604755B2 (en) * | 2005-02-15 | 2011-01-05 | 横浜ゴム株式会社 | Tire information transmitting apparatus and tire information acquiring system using the same |
| WO2012023379A1 (en) * | 2010-08-18 | 2012-02-23 | 株式会社東海理化電機製作所 | Sensor unit and method for registering sensor unit for tire air pressure monitoring system |
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