JPH0310132A - Apparatus for detecting driving state of vehicle - Google Patents
Apparatus for detecting driving state of vehicleInfo
- Publication number
- JPH0310132A JPH0310132A JP1146207A JP14620789A JPH0310132A JP H0310132 A JPH0310132 A JP H0310132A JP 1146207 A JP1146207 A JP 1146207A JP 14620789 A JP14620789 A JP 14620789A JP H0310132 A JPH0310132 A JP H0310132A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output
- driving state
- transistor
- water temperature
- 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
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006903 response to temperature Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
- G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
- G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
- G01K7/25—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit for modifying the output characteristic, e.g. linearising
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、車両の運転状態検出装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle driving state detection device.
第８図は従来装置の構成を示し、ｌはエンジンの冷却水
温を検出する水温センサで、サーミスタにより構成され
ている。サーミスタは第６図に示すように周囲温度に応
じて抵抗が変化する。水温センサ１の出力は制御部２へ
入力され、まず抵抗Ｒ＋、Ｒｚにより第７図の破線で示
す電圧に変換され、次にＡ／Ｄコンバータ２ｂによりデ
ィジタル信号に変換され、さらにマイクロコンピュータ
２ａに水温情報として入力される。マイクロコンピュー
タ２ａはこの水温情報を基にして各種の車両特性制御を
行う。FIG. 8 shows the configuration of a conventional device, where l is a water temperature sensor for detecting the engine cooling water temperature, which is composed of a thermistor. As shown in FIG. 6, the resistance of the thermistor changes depending on the ambient temperature. The output of the water temperature sensor 1 is input to the control unit 2, first converted to the voltage shown by the broken line in FIG. It is input as water temperature information. The microcomputer 2a performs various vehicle characteristic controls based on this water temperature information.
しかしながら、第８図に示した従来装置では、第７図に
示すように低温側での検出精度を向上させるようにＲ，
、Ｒ，を定めると、高温側では温度変化に応じて電圧が
あまり変化せず、高温側での検出精度が低下した。However, in the conventional device shown in FIG. 8, as shown in FIG.
, R, was determined, the voltage did not change much in response to temperature changes on the high temperature side, and the detection accuracy on the high temperature side decreased.
そこで、第９図に示すように、低温側検出用の水温セン
サｌａと高温側検出用の水温センサｌｂを設け、これら
にそれぞれ電圧変換手段Ｒ，，Ｒ。Therefore, as shown in FIG. 9, a water temperature sensor la for low-temperature side detection and a water temperature sensor lb for high-temperature side detection are provided, and voltage conversion means R, , R are provided for these, respectively.
及びＲ、、、Ｒ□１を接続し、それぞ゛れの出力をＡ／
Ｄコンバータ２ｂを介してマイクロコンピュータ２ａに
入力するようにしており、これは低温時には水温センサ
１ａ側からの入力によって水温情報を得、高温時には水
温センサ１ｂ側からの入力によって水温情報を得るもの
である。and R, , R□1, and connect their respective outputs to A/
The water temperature information is input to the microcomputer 2a via the D converter 2b, and when the temperature is low, the water temperature information is obtained from the input from the water temperature sensor 1a side, and when the temperature is high, the water temperature information is obtained from the input from the water temperature sensor 1b side. be.
第９図に示した従来装置では、広い温度範囲で高い検出
精度が得られるが、水温センサや電圧変換手段が２個ず
つ必要となり、高価になるという課題があった。Although the conventional device shown in FIG. 9 can achieve high detection accuracy over a wide temperature range, it requires two water temperature sensors and two voltage conversion means, making it expensive.
この発明は上記のような課題を解決するために成された
ものであり、広い範囲で高い検出精度が得られると共に
、安価な車両の運転状態検出装置を得ることを目的とす
る。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain an inexpensive vehicle driving state detection device that can achieve high detection accuracy over a wide range.
この発明に係る車両の運転状態検出装置は、運転状態検
出手段の出力に対応した電圧を発生する電圧変換手段と
、電圧変換手段の出力をディジタル変換するＡ／Ｄ変換
手段と、Ａ／Ｄ変換手段の出力に応じて電圧変換手段の
出力特性を切換える特性切換手段を備えたものである。A driving state detection device for a vehicle according to the present invention includes a voltage conversion means for generating a voltage corresponding to the output of the driving state detection means, an A/D conversion means for digitally converting the output of the voltage conversion means, and an A/D conversion means for digitally converting the output of the voltage conversion means. The voltage conversion means includes characteristic switching means for switching the output characteristics of the voltage conversion means in accordance with the output of the means.
この発明においては、運転状態検出手段の出力は電圧に
変換され、さらにＡ／Ｄ変換され、このＡ／Ｄ変換値が
所定値より大きいか否かにより電圧変換特性が切換えら
れる。In this invention, the output of the operating state detection means is converted into a voltage and further A/D converted, and the voltage conversion characteristic is switched depending on whether or not this A/D converted value is larger than a predetermined value.
以下、この発明の実施例を図面とともに説明する。第１
図はこの発明の第１の実施例による運転状態検出装置の
構成を示し、Ｑ、はトランジスタ、Ｒ１は抵抗で、トラ
ンジスタＱ１と抵抗Ｒ３の直列接続が抵抗Ｒ１と並列に
接続され、トランジスタＱ１のベースにはマイクロコン
ピュータ２ａの出力ポートＰｔから信号が送られる。Embodiments of the present invention will be described below with reference to the drawings. 1st
The figure shows the configuration of the operating state detection device according to the first embodiment of the present invention, where Q is a transistor, R1 is a resistor, the series connection of the transistor Q1 and the resistor R3 is connected in parallel with the resistor R1, and the transistor Q1 is connected in series with the resistor R1. A signal is sent to the base from the output port Pt of the microcomputer 2a.
次に、上記構成の動作を第３図のフローチャートを用い
て説明する。制御部２は図示しない電源をオンするとス
タートし、ステップ１０１では判断フラグをリセットし
、ステップ１０２ではＰからＨｆ８号を出力する。これ
により、トランジスタＱ１がオフし、水温センサ１の出
力は抵抗ＲＲ２により電圧に変換され、この電圧はステ
ップ１０３でＡ／Ｄコンバータ２ｂによりＡ／Ｄ変換さ
れ、ＷＴとして記憶される。ステップ１０４ではこのＷ
Ｔと判定値α（例えば第７図の６０℃に対応した値）を
比較し、ＷＴ＞αであれば（即ち６０℃より低温）検出
精度が良と判断し、ステップ１０８へ進む、ＷＴ＜αで
あれば６０℃以上であるから検出精度が不良と判断し、
ステップ１０５で判断フラグをセントし、ステップ１０
６ではＰ、からＬ信号を出力してトランジスタＱ、をオ
ンさせる。これにより、水温センサｌの出力は抵抗Ｒ６
〜Ｒ１により電圧に変換され、ステップ１０７でＡ／Ｄ
変換される。この電圧は第７図で実線で示すものとなり
、温度変化に対しての電圧変化が大きくなり、６０℃以
上での検出精度が向上する。Next, the operation of the above configuration will be explained using the flowchart shown in FIG. The control unit 2 starts when a power source (not shown) is turned on, resets the determination flag in step 101, and outputs Hf8 from P in step 102. As a result, the transistor Q1 is turned off, and the output of the water temperature sensor 1 is converted into a voltage by the resistor RR2, and this voltage is A/D converted by the A/D converter 2b in step 103 and stored as WT. In step 104, this W
T and the judgment value α (for example, the value corresponding to 60°C in FIG. 7) are compared, and if WT>α (that is, lower than 60°C), the detection accuracy is determined to be good, and the process proceeds to step 108, where WT< If α is 60℃ or higher, the detection accuracy is judged to be poor.
In step 105, the judgment flag is set, and in step 10
At step 6, an L signal is output from P to turn on transistor Q. As a result, the output of the water temperature sensor l becomes the resistance R6.
~ Converted to voltage by R1, and A/D in step 107
converted. This voltage is shown by the solid line in FIG. 7, and the voltage change with respect to temperature changes becomes large, and the detection accuracy at 60° C. or higher improves.
ステップ１０８では判断フラグがセントかリセットかを
判断し、リセットされていれば即ち６０℃以下であれば
ステップ１０９で第４図に示すマツプｆ、（ＷＴ）を選
択し、補間演算を行って温度データに変換する０判断フ
ラグがセットの場合即ち６０℃以上の場合にはステップ
１１０で第５図に示すマツプｆ、（ＷＴ）を選択し、補
間演算して温度データとする。これらの温度データは燃
料噴射制御や点火時期制御に用いられる。In step 108, it is determined whether the determination flag is cents or reset, and if it is reset, that is, below 60°C, then in step 109, the map f, (WT) shown in FIG. 4 is selected, and interpolation is performed to determine the temperature If the 0 determination flag for converting into data is set, that is, if the temperature is 60° C. or higher, the map f, (WT) shown in FIG. 5 is selected in step 110, and interpolation is performed to obtain temperature data. These temperature data are used for fuel injection control and ignition timing control.
上記実施例では以上のように所定温度以上と以下上で電
圧変換手段の変換特性を変えており、広い温度範囲で高
い検出精度が得られる。なお、上記実施例ではＲ１を設
けているが、なくてもよい。In the embodiment described above, the conversion characteristics of the voltage conversion means are changed above and below a predetermined temperature as described above, and high detection accuracy can be obtained over a wide temperature range. Note that although R1 is provided in the above embodiment, it may be omitted.
又、Ｒ１，Ｒ１は低温側が高精度となるように設定され
ているが、逆に低温側でトランジスタＱ、をオンさせる
ようにしてもよい。Further, although R1 and R1 are set so that the accuracy is higher on the low temperature side, it is also possible to turn on the transistor Q on the low temperature side.
第２図はこの発明の第２の実施例を示し、トランジスタ
Ｑ、と抵抗Ｒ１に代って、トランジスタＱ２と抵抗Ｒ４
の直列回路を抵抗Ｒ１と並列に接続し、トランジスタＱ
！のベースにマイクロコンビエータ２ａのＲ２ポートか
ら信号を送るようにしており、Ｐｌから出力したレベル
とＲ２から出力するレベルを逆にする以外は第１の実施
例と同様であり、同様の効果を奏する。FIG. 2 shows a second embodiment of the invention, in which transistor Q2 and resistor R4 are replaced by transistor Q and resistor R1.
A series circuit of Q is connected in parallel with resistor R1, and transistor Q
! The signal is sent from the R2 port of the micro combinator 2a to the base of the micro combinator 2a, and the same effect as in the first embodiment is achieved except that the level output from Pl and the level output from R2 are reversed. play.
なお、上記各実施例においては、エンジン水温を検出す
るようにしたが、車両の他の運転状態を検出する場合に
もこの発明は適用することができる。In each of the above embodiments, the engine water temperature is detected, but the present invention can also be applied to detecting other operating conditions of the vehicle.
以上のようにこの発明によれば、運転状態検出手段の出
力を電圧変換し、Ａ／Ｄ変換した際に、このＡ／Ｄ変換
値が所定値より大きいか否かによって上記した電圧変換
の際の出力特性を切換えるようにしており、検出精度が
悪化するような領域においては電圧変換特性の切換によ
り高い検出精度を得るようにしており、広範囲にわたっ
て高い検出精度が得られると共に、運転状態検出手段や
電圧変換手段は１個設ければよく、安価に形成すること
ができる。As described above, according to the present invention, when the output of the operating state detection means is converted into voltage and A/D converted, the voltage conversion is performed depending on whether or not this A/D conversion value is larger than a predetermined value. In areas where detection accuracy deteriorates, high detection accuracy is obtained by switching the voltage conversion characteristics.In addition to obtaining high detection accuracy over a wide range, the operating state detection means It is only necessary to provide one voltage converting means, and it can be formed at low cost.
第１図及び第２″図はこの発明装置の第１及び第２の実
施例による構成図、第３図はこの発明装置の第１の実施
例による動作を示すフローチャート、第４図及び第５図
はＡ／Ｄ変換値を温度データに変換するためのデータマ
ツプ、第６図はサーミスタの特性図、第７図はこの発明
によるサーミスタ周囲温度とＡ／Ｄコンバータの入力電
圧との関係図、第８図及び第９図は従来装置の構成図で
ある。
１・・・水温センサ、Ｒ９−Ｒ１・・・抵抗、Ｑ ＋
、 Ｑ ｘ・・・トランジスタ、２ａ・・・マイクロコ
ンピュータ、２ｂ・・・Ａ／Ｄコンバータ。
なお、図中同一符号は同−又は相当部分を示す。1 and 2'' are configuration diagrams of the first and second embodiments of the device of this invention, FIG. 3 is a flowchart showing the operation of the first embodiment of the device of the invention, and FIGS. 4 and 5 The figure shows a data map for converting A/D conversion values into temperature data, FIG. 6 shows the characteristics of the thermistor, FIG. 7 shows the relationship between the thermistor ambient temperature and the input voltage of the A/D converter according to the present invention, and FIG. 8 and 9 are configuration diagrams of conventional devices. 1... Water temperature sensor, R9-R1... Resistor, Q +
, Q x...Transistor, 2a...Microcomputer, 2b...A/D converter. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
態検出手段の出力に対応した電圧を発生する電圧変換手
段と、電圧変換手段の出力をディジタル信号に変換する
Ａ／Ｄ変換手段と、Ａ／Ｄ変換手段の出力が所定値より
大きいか否かにより電圧変換手段の出力特性を切換える
特性切換手段を備えたことを特徴とする車両の運転状態
検出装置。A driving state detecting means for detecting the driving state of the vehicle; a voltage converting means for generating a voltage corresponding to the output of the driving state detecting means; an A/D converting means for converting the output of the voltage converting means into a digital signal; 1. A vehicle driving state detection device comprising characteristic switching means for switching the output characteristic of the voltage conversion means depending on whether the output of the /D conversion means is greater than a predetermined value.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1146207A JPH0310132A (en) | 1989-06-08 | 1989-06-08 | Apparatus for detecting driving state of vehicle |
| KR1019900008175A KR930008397B1 (en) | 1989-06-08 | 1990-06-04 | Vehicle driving condition detecting apparatus |
| DE4018281A DE4018281A1 (en) | 1989-06-08 | 1990-06-07 | State of vehicle determination arrangement - detects temp. of cooling water and contains detector, transducer, A=D and characteristic change device for transducer |
| US07/779,165 US5140302A (en) | 1989-06-08 | 1991-10-21 | Vehicle driving condition detecting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1146207A JPH0310132A (en) | 1989-06-08 | 1989-06-08 | Apparatus for detecting driving state of vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0310132A true JPH0310132A (en) | 1991-01-17 |
Family
ID=15402543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1146207A Pending JPH0310132A (en) | 1989-06-08 | 1989-06-08 | Apparatus for detecting driving state of vehicle |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0310132A (en) |
| KR (1) | KR930008397B1 (en) |
| DE (1) | DE4018281A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06186090A (en) * | 1992-07-03 | 1994-07-08 | Hochiki Corp | Thermal analog fire detector |
| JP2009121825A (en) * | 2007-11-12 | 2009-06-04 | Shindengen Electric Mfg Co Ltd | Temperature detection circuit |
| WO2023085045A1 (en) * | 2021-11-10 | 2023-05-19 | 株式会社オートネットワーク技術研究所 | Temperature detection device, temperature detection method, and computer program |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU643510B2 (en) * | 1990-03-23 | 1993-11-18 | Respiratory Support Products Inc. | Electrical circuits |
| JP3126476B2 (en) * | 1991-04-23 | 2001-01-22 | 株式会社東芝 | Cryogenic temperature measurement device |
| DE69232673T2 (en) * | 1991-04-23 | 2003-03-13 | Toshiba Kawasaki Kk | Tiefsttemperaturmessausrüstung |
| DE4215759A1 (en) * | 1992-02-21 | 1993-08-26 | Paul Prof Dr Ing Guempel | Road vehicle with electrical clock and parking time display - that has control switch operated when engine is turned off to set time display on parking meter |
| DE19625889A1 (en) * | 1996-06-27 | 1998-01-02 | Bayerische Motoren Werke Ag | Method for model-based simulation of the coolant temperature in a vehicle |
| KR100335939B1 (en) * | 1999-07-08 | 2002-05-09 | 이계안 | Water temperature complement device for engine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2926070A1 (en) * | 1979-06-28 | 1981-01-15 | Volkswagenwerk Ag | Control system reducing fuel consumption IC engine - uses AND=gate as aid to driver in selecting best speed for given loading |
| DE3039318C2 (en) * | 1980-10-17 | 1982-10-21 | Becker Autoradiowerk Gmbh, 7516 Karlsbad | Arrangement for measuring and / or monitoring and / or evaluating physical quantities in a motor vehicle |
| DD234187A3 (en) * | 1984-08-23 | 1986-03-26 | Weinert E Messgeraetewerk | CIRCUIT ARRANGEMENT FOR SIGNAL PROCESSING IN RADIATION PYROMETERS |
-
1989
- 1989-06-08 JP JP1146207A patent/JPH0310132A/en active Pending
-
1990
- 1990-06-04 KR KR1019900008175A patent/KR930008397B1/en not_active IP Right Cessation
- 1990-06-07 DE DE4018281A patent/DE4018281A1/en not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06186090A (en) * | 1992-07-03 | 1994-07-08 | Hochiki Corp | Thermal analog fire detector |
| JP2009121825A (en) * | 2007-11-12 | 2009-06-04 | Shindengen Electric Mfg Co Ltd | Temperature detection circuit |
| WO2023085045A1 (en) * | 2021-11-10 | 2023-05-19 | 株式会社オートネットワーク技術研究所 | Temperature detection device, temperature detection method, and computer program |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4018281A1 (en) | 1990-12-20 |
| KR910001368A (en) | 1991-01-30 |
| KR930008397B1 (en) | 1993-08-31 |
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