JPS5891986A - Solenoid valve control device - Google Patents

Solenoid valve control device

Info

Publication number
JPS5891986A
JPS5891986A JP19148381A JP19148381A JPS5891986A JP S5891986 A JPS5891986 A JP S5891986A JP 19148381 A JP19148381 A JP 19148381A JP 19148381 A JP19148381 A JP 19148381A JP S5891986 A JPS5891986 A JP S5891986A
Authority
JP
Japan
Prior art keywords
solenoid valve
transistor
signal
power supply
microcomputer
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.)
Granted
Application number
JP19148381A
Other languages
Japanese (ja)
Other versions
JPS634069B2 (en
Inventor
Makoto Tsuboi
誠 坪井
Hirokuni Murakami
博邦 村上
Hiroshi Fujieda
藤枝 博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP19148381A priority Critical patent/JPS5891986A/en
Publication of JPS5891986A publication Critical patent/JPS5891986A/en
Publication of JPS634069B2 publication Critical patent/JPS634069B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/06Electromagnets; Actuators including electromagnets
    • H01F7/08Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1844Monitoring or fail-safe circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

PURPOSE:To improve the safety against failures of a solenoid valve by providing a control circuit which inputs a pulse signal to a transistor of a solenoid valve drive circuit arranged with a solenoid valve between a DC power supply and the transistor and also compares a collector output signal with the pulse signal to monitor the solenoid valve drive circuit. CONSTITUTION:When a DC power supply 1 is applied to a microcomputer 3, a relay 5 operates through a transistor 6 and a load power supply 2 is applied to a solenoid valve 7. When the solenoid valve 7 is to be driven to operate, the microcomputer 3 applies a pulse voltage from its output port 3b to a solenoid valve driving transistor 8, thus drives the solenoid valve 7, receives a collector signal from a voltage detector 13 through an input port 3c, compares this signal with the signal of the output port 3b, and when an inconsistent state has continued for a certain time, the relay 5 is turned off and the driving of the solenoid valve 7 is stopped.

Description

【発明の詳細な説明】 本発明は、マイクロコンビュ′−夕を用いて、燃料等を
供給する電磁弁を駆動する制御装置に関す2〜 ′ るもので、特にガス・石油機器等の燃焼制御用の電磁弁
制御に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device that uses a microcomputer to drive a solenoid valve that supplies fuel, etc., and is particularly applicable to combustion control of gas and oil equipment. This relates to solenoid valve control for

従来から、ガス燃焼機器等に用い、られている燃焼制御
用電磁弁の駆動は、リレー、トランジスタにかかわらず
、直流電源を前記リレー又はトランジスタの入力部に印
加して動作させ、電磁弁を駆動することが一般的であっ
た。このためにトランジスター又はリレーが正常動作−
をしているか、故障しているかの判定を常時行なうこと
ができず、電磁弁を駆動するリレー又はトランジスタの
ショート故障に対する安全性の確保が問題となっていた
Conventionally, combustion control solenoid valves used in gas combustion equipment, etc., are driven by applying DC power to the input section of the relay or transistor to drive the solenoid valve, regardless of whether it is a relay or a transistor. It was common to do so. For this reason, the transistor or relay operates normally.
It is not possible to constantly determine whether the solenoid valve is operating or malfunctioning, and ensuring safety against short-circuit failures of the relay or transistor that drives the solenoid valve has become a problem.

本発明は上記問題点を解消するもので、電磁弁を駆動す
るトランジスタをパルス制御するとともに、トランジス
タのコレクター電圧を入力し、前記パルス信号との一致
判定を常時行う機能をマイクロコンピュータに持たせ、
電磁弁を駆動するトランジスタ及び電磁弁に故障が発生
したとき、電磁弁へ供給している電源を遮断するリレー
回路をマイクロコンピュータに制御させて、電磁弁をオ
3ページ フさせ、燃料供給を停止せしめ電磁弁駆動用トランジス
タ及び電磁弁の故障に対する安全性を向上させるもので
ある。
The present invention solves the above-mentioned problems by providing a microcomputer with the function of pulse-controlling the transistor that drives the solenoid valve, inputting the collector voltage of the transistor, and constantly determining whether the transistor matches the pulse signal.
When a failure occurs in the transistor that drives the solenoid valve and the solenoid valve, the microcomputer controls the relay circuit that cuts off the power supply to the solenoid valve, turns the solenoid valve off, and stops the fuel supply. This improves the safety against failure of the solenoid valve driving transistor and the solenoid valve.

以下本発明の一実施例を第1図、第2図及び第3図とと
もに説明する。
An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3.

1は制御用直流電源、2は電磁弁等の負荷用直流電源、
3はマイクロコンピュータ、4bは電源遮断回路で、直
流電源2にリレー5をトランジスタ6を介して接続した
リレー駆動部とからなる。
1 is a DC power supply for control, 2 is a DC power supply for loads such as solenoid valves,
Reference numeral 3 denotes a microcomputer, and 4b a power cutoff circuit, which includes a relay drive section in which a relay 5 is connected to a DC power supply 2 via a transistor 6.

4aは電磁弁駆動回路で、直流電源2を前記リレー5の
接点を介し、電磁弁7.トランジスタ8を接続してなる
。マイクロコンピュータ3は、出力ポート3ムから抵抗
器9,10を介してリレー駆動用トランジスタ6を、又
出力ポート3Bから抵抗器11.12を介して電磁弁駆
動用トランジスタ8を制御する。13はトランジスタ8
のコレクタ電圧検出部で、ダイオード14.インバータ
16、抵抗器16よシなシ、マイクロコンピュータの入
カポ−)3Gに接続されるように構成されている。なお
17.18は逆電圧抑制用ダイオ−特開昭58−919
86(2) ドである。
4a is a solenoid valve drive circuit which connects the DC power supply 2 through the contacts of the relay 5 and drives the solenoid valve 7. It is formed by connecting transistor 8. The microcomputer 3 controls the relay driving transistor 6 from the output port 3B through resistors 9 and 10, and the solenoid valve driving transistor 8 from the output port 3B through the resistors 11 and 12. 13 is transistor 8
In the collector voltage detection section of the diode 14. The inverter 16, the resistor 16, and the microcomputer input port 3G are connected to each other. Note that 17.18 is a reverse voltage suppression diode - JP-A-58-919
86(2).

以上の構成において、第2図に示すタイミング図を用い
て動作を説明する。
The operation of the above configuration will be explained using the timing diagram shown in FIG.

マイクロコンピュータ3に直流電源1が印加されると、
出力端子3ムよりリレー駆動用トランジスタ6へ(ム)
に示す波形のごとく直流電圧を印加する。故にリレー5
はトランジスタ6により駆動され、負荷用電源2を電磁
弁7へ供給する。リレー6の動作を波形の)に示す。な
お前記タイミングを時間Tφに示している。時間T1で
、電磁弁を駆動するための操作(図示せず)が行なわれ
ると、マイクロコンピュータ3は、出カポ−)3Bから
直流電圧を電磁弁駆動用トランジスタ8へ印加して、電
磁弁7を駆動する。なおトランジスタ8へ印加する直流
電圧gTD時間毎にオン・オフを繰り返すパルス信号と
する。この波形を(C)に示す。同時にマイクロコンピ
ュータ3は、電圧検出部13からのコレクタ信号を定期
的に入出ポート3Cから入力して、出カポ−)3Bの信
号と一致しているか否かを判定する。入力信号を(D)
に示す。前記信5ページ 号(C)とCD)が一致していれば、トランジスタ8の
パルス駆動を継続するが、時間T2に示すごとり、トラ
ンジスタ8がショート故障をした場合、出力ポート3B
の信号はL6w 、入力ボート3Gの信号はHi  レ
ベルになシ一致しない。入カポ−)30の信号と、出カ
ポ−)3Bの信号の不一致がTX時間継続するとマイク
ロコンピュータ3は異常と判定し、リレー駆動用トラン
ジスタ6への直流電圧印加を停止し、リレーをオフする
。故に電磁弁7への直流電源2が遮断され、電磁弁7は
オフする。
When the DC power supply 1 is applied to the microcomputer 3,
From output terminal 3 to relay drive transistor 6 (mu)
Apply a DC voltage as shown in the waveform shown below. Therefore relay 5
is driven by the transistor 6 and supplies the load power source 2 to the solenoid valve 7. The operation of relay 6 is shown in waveform (). Note that the timing is shown as time Tφ. When an operation (not shown) for driving the solenoid valve is performed at time T1, the microcomputer 3 applies a DC voltage from the output capacitor 3B to the solenoid valve driving transistor 8, and the solenoid valve 7 to drive. Note that the DC voltage gTD applied to the transistor 8 is a pulse signal that repeatedly turns on and off every time. This waveform is shown in (C). At the same time, the microcomputer 3 periodically inputs the collector signal from the voltage detection section 13 from the input/output port 3C, and determines whether it matches the signal from the output port 3B. Input signal (D)
Shown below. If the signal number 5 (C) and CD) match, the pulse drive of the transistor 8 is continued, but if the transistor 8 has a short circuit failure as shown at time T2, the output port 3B
The signal at L6w does not match the signal at input port 3G at Hi level. If the mismatch between the input coupler 30 signal and the output coupler 3B signal continues for TX time, the microcomputer 3 determines that there is an abnormality, stops applying DC voltage to the relay drive transistor 6, and turns off the relay. . Therefore, the DC power supply 2 to the solenoid valve 7 is cut off, and the solenoid valve 7 is turned off.

これを時間T3に示す。電磁弁7は開放電流と保持電流
の間にヒステリシスが存在する。従がって一度開放電流
に達して開放すれば、以降保持電流域で動作を行なうの
で1/(TD+TD)で定まる周波数でトランジスタを
駆動することが可能となる。
This is shown at time T3. The solenoid valve 7 has hysteresis between the opening current and the holding current. Therefore, once the open circuit current is reached and the circuit is opened, the transistor operates in the holding current range, making it possible to drive the transistor at a frequency determined by 1/(TD+TD).

第3図にマイクロコンピュータ3のプログラムを示すフ
ローチャートを記す。マイクロコンピュータ3は電源が
印加され可動状態になると5TARTよりプログラムの
実行を開始する。初めに主プログラムに必要な入出力ボ
ート及びRAM処理を行なう「初期設定」を行う。次に
所定時間経過したかを「時間か?」で判定する。前記所
定時間は第2図に示した時間TDを作成するためのもの
である6所定時間に達していたならば「5T1=1」で
パルス出力のオンタイミングなのか、オフタイミングか
を判定する。5T1=1をオン、5T1=φをオフタイ
ミングとして出力ポート3Bの出力をしている。ただし
オンタイミングで゛は、オン出力すべきかを「運転中か
」で判定させている。出力ポート3ムは正常動作中は常
にオン出力させている。以降タイマ類の計数、主プログ
ラムの実行を行う。
FIG. 3 shows a flowchart showing the program of the microcomputer 3. When the microcomputer 3 is powered on and becomes operational, it starts executing the program from 5TART. First, "initialization" is performed to perform input/output ports and RAM processing necessary for the main program. Next, it is determined whether a predetermined period of time has elapsed by asking "Is it time?" The predetermined time is for creating the time TD shown in FIG. 2. If the predetermined time has reached 6, it is determined whether the pulse output is on-timing or off-timing with "5T1=1". The output from the output port 3B is performed with 5T1=1 as the on timing and 5T1=φ as the off timing. However, regarding the on-timing, whether or not the on-output should be made is determined based on whether the motor is in operation. Output port 3 is always turned on during normal operation. After that, count the timers and execute the main program.

主プログラム実行後から所定時間に達するまで、入力ポ
ート3Gを入力して以前に出力した出力ポート3Bの情
報と一致しているかを判定する。一致していれば主プロ
グラム実行ループへリターンし、一致していなければ、
一致していない時間を測定し、設定時間以上であれば全
出力をオフしH6LTさせるべくマイクロコンピュータ
のプログラムを作成している。
Until a predetermined time has elapsed after the execution of the main program, it is determined whether the input information from the input port 3G matches the previously output information from the output port 3B. If they match, return to the main program execution loop; if they do not match, return to the main program execution loop.
A microcomputer program is created to measure the time during which they do not match, and if the time exceeds the set time, turn off all outputs and perform H6LT.

第4図に他の実施例によ□名電磁弁駆動回路4ム7ペー
ジ 及びコレクタ電圧検出部13を示す。第2図との差異は
、コレクタ電圧検出を抵抗器19,20とインバータ1
5により構成している所にある。抵抗器19は電磁弁駆
動用トランジスタ8のコレクタ電位を検出するもので、
トランジスタ8がオン状態であればL6wレベル、オフ
状態にあるときはHiレベルとなり、インバータ15を
介してマイクロコンピュータ3へ入力する。抵抗器2o
は、電磁弁7の抵抗値と比較し小さな抵抗値に設定され
、電磁弁7のショート故障を検出するものである。つま
り電磁弁がショート故障した時トランジスタのオン・オ
フにかかわらず抵抗器19で検出される電位は抵抗器2
oで発生する電位によpHiレベルとなシ、異常を判定
する。なお電磁弁7のオープン故障は、抵抗器19の検
出電位が常にLowレベルとなり判定可能である。なお
トランジスタ8の故障は第2図に説明したと同様である
FIG. 4 shows a solenoid valve drive circuit 4 and a collector voltage detection section 13 according to another embodiment. The difference from Fig. 2 is that the collector voltage is detected using resistors 19 and 20 and inverter 1.
It is located in the place where it consists of 5. The resistor 19 is for detecting the collector potential of the electromagnetic valve driving transistor 8.
When the transistor 8 is on, the signal becomes L6w level, and when it is off, the signal becomes Hi level, and is input to the microcomputer 3 via the inverter 15. resistor 2o
is set to a small resistance value compared to the resistance value of the solenoid valve 7, and is used to detect a short-circuit failure of the solenoid valve 7. In other words, when the solenoid valve has a short-circuit failure, the potential detected by resistor 19 is the same as that of resistor 2 regardless of whether the transistor is on or off.
The pHi level and abnormalities are determined based on the potential generated at 0. Note that an open failure of the solenoid valve 7 can be determined because the detected potential of the resistor 19 is always at a low level. Note that the failure of the transistor 8 is the same as that explained in FIG.

なお第2図、第4図の実施例は1つの電磁弁の駆動を示
したが、複数の電磁弁でも可能である。
Although the embodiments shown in FIGS. 2 and 4 are driven by one solenoid valve, it is also possible to use a plurality of solenoid valves.

以上のように本発明の電磁弁制御装置によれば、電磁弁
駆動用トランジスタのコレクタ電圧を常時監視すること
で、前記トランジスタの故障を検出する。前記トランジ
スタの故障が検出されると、前記電磁弁へ供給している
電源を遮断し、前記電磁弁を閉じて、燃焼装置の安全性
を高めている。
As described above, according to the solenoid valve control device of the present invention, failure of the solenoid valve driving transistor is detected by constantly monitoring the collector voltage of the transistor. When a failure of the transistor is detected, the power supply to the solenoid valve is cut off and the solenoid valve is closed, thereby increasing the safety of the combustion device.

また電磁弁パルス駆動するため消費電力を低減させる効
果が得られる。
Furthermore, since the electromagnetic valve is driven by pulses, it is possible to reduce power consumption.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の電磁弁制御装置の一実施例を示す回路
図、第2図は同回路の動作を説明するためのタイミング
図、第3図は同回路のマイクロコンピュータのフローチ
ャート図、第4図は同地の実施例を示す回路図である。 1.2・・・・・・直流電源、3・・・・・・マイクロ
コンピュータ、4a・・・・・・電磁弁駆動回路、8,
6・・・・・・トランジスタ、4b・・・・・・電源遮
断回路、7・・・・・・電磁弁。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第2
図 第3図
Fig. 1 is a circuit diagram showing one embodiment of the solenoid valve control device of the present invention, Fig. 2 is a timing diagram for explaining the operation of the circuit, Fig. 3 is a flowchart of the microcomputer of the circuit, and Fig. Figure 4 is a circuit diagram showing an example of the same location. 1.2...DC power supply, 3...Microcomputer, 4a...Solenoid valve drive circuit, 8,
6...Transistor, 4b...Power cutoff circuit, 7...Solenoid valve. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3

Claims (2)

【特許請求の範囲】[Claims] (1)燃料等の供給を制御する電磁弁を直流電源とトラ
ンジスタ間に接続した電磁弁駆動回路と、前記電磁弁駆
動回路へ供給する直流電源を制御−する電源遮断回路と
、パル、ス信号を前記トランジスタの入力部に印加する
とともに、前記トランジスタの出力部のコレクタ信号を
入力し、前記パルス信号とコレクタ信号とを比較して電
磁弁駆動回路の状態監視を行う制御回路を有する電磁弁
制御装置。
(1) A solenoid valve drive circuit that connects a solenoid valve that controls the supply of fuel, etc. between a DC power source and a transistor, a power cutoff circuit that controls the DC power supply that is supplied to the solenoid valve drive circuit, and pulse and pulse signals. A solenoid valve control comprising a control circuit that applies a voltage to an input part of the transistor, inputs a collector signal of an output part of the transistor, and monitors the state of a solenoid valve drive circuit by comparing the pulse signal and the collector signal. Device.
(2)前記制御回路が異常状態を判定したとき、前記電
源遮断回路を用いて電磁弁制御回路へ供給する直流電源
を遮断する特許請求の範囲第1項記載の電磁弁制御装置
(2) The electromagnetic valve control device according to claim 1, wherein when the control circuit determines an abnormal state, the power supply cutoff circuit is used to cut off the DC power supplied to the electromagnetic valve control circuit.
JP19148381A 1981-11-27 1981-11-27 Solenoid valve control device Granted JPS5891986A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19148381A JPS5891986A (en) 1981-11-27 1981-11-27 Solenoid valve control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19148381A JPS5891986A (en) 1981-11-27 1981-11-27 Solenoid valve control device

Publications (2)

Publication Number Publication Date
JPS5891986A true JPS5891986A (en) 1983-06-01
JPS634069B2 JPS634069B2 (en) 1988-01-27

Family

ID=16275391

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19148381A Granted JPS5891986A (en) 1981-11-27 1981-11-27 Solenoid valve control device

Country Status (1)

Country Link
JP (1) JPS5891986A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6394379U (en) * 1986-12-11 1988-06-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6394379U (en) * 1986-12-11 1988-06-17

Also Published As

Publication number Publication date
JPS634069B2 (en) 1988-01-27

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