JPH0713013U - Fluid pressure abnormality detection circuit and electro-hydraulic pressure regulator having the circuit - Google Patents
Fluid pressure abnormality detection circuit and electro-hydraulic pressure regulator having the circuitInfo
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- JPH0713013U JPH0713013U JP4468593U JP4468593U JPH0713013U JP H0713013 U JPH0713013 U JP H0713013U JP 4468593 U JP4468593 U JP 4468593U JP 4468593 U JP4468593 U JP 4468593U JP H0713013 U JPH0713013 U JP H0713013U
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Abstract
(57)【要約】
【目的】 出力流体圧の異常を検出する異常検出回路を
提供する。
【構成】 設定流体圧に対応する入力電気信号と出力流
体圧を変換した出力電気信号とが入力される差動増幅回
路２、全波整流回路３、遅延回路４、比較回路６及び出
力回路７を直列に接続するとともに、許容偏差設定回路
５で設定した許容偏差信号を比較回路６に入力する。比
較回路６は、遅延回路及び許容偏差設定回路から入力さ
れた信号を比較し、出力回路７は、比較回路で比較した
偏差が所定の範囲内のときは導通し、この範囲を超えた
ときは非導通となる。
【効果】 制御機器側と無関係に出力流体圧の異常を検
出できる。
(57) [Summary] [Objective] To provide an abnormality detection circuit for detecting an abnormality in the output fluid pressure. A differential amplifier circuit 2, a full-wave rectifier circuit 3, a delay circuit 4, a comparison circuit 6, and an output circuit 7 to which an input electric signal corresponding to a set fluid pressure and an output electric signal obtained by converting the output fluid pressure are input. Are connected in series, and the allowable deviation signal set by the allowable deviation setting circuit 5 is input to the comparison circuit 6. The comparison circuit 6 compares the signals input from the delay circuit and the allowable deviation setting circuit, and the output circuit 7 conducts when the deviation compared by the comparison circuit is within a predetermined range, and when the deviation exceeds this range. It becomes non-conductive. [Effect] Abnormal output fluid pressure can be detected regardless of the control device side.
Description
【０００１】[0001]
本考案は、出力流体圧の異常を検出する流体圧の異常検出回路、及びこの異常 検出回路を組み込んだ電気流体圧レギュレータに関するものである。 The present invention relates to a fluid pressure abnormality detection circuit for detecting an abnormality in output fluid pressure, and an electric fluid pressure regulator incorporating this abnormality detection circuit.
【０００２】[0002]
圧力流体の供給ポート、出力ポート及び排出ポートを有し、ソレノイドその他 のアクチュエータの通電制御によって出力ポートを供給ポートと排出ポートとに 切換えて連通させる制御弁と、上記アクチュエータの通電を制御する制御回路と 、出力ポートの流体圧を電気信号に変換して出力する圧力センサとを備えた電気 流体圧レギュレータは、特に例示するまでもなく既に知られている。 A control valve that has a pressure fluid supply port, an output port, and a discharge port, and switches the output port between the supply port and the discharge port to communicate by controlling the energization of a solenoid or other actuator, and a control circuit that controls the energization of the actuator. An electro-hydraulic pressure regulator including a pressure sensor that converts a fluid pressure at an output port into an electric signal and outputs the electric signal is already known, without particular exemplification.
【０００３】 上記公知の電気流体圧レギュレータは、従来は図１０に示すように、動作モニ タとして、上記レギュレータの出力ポートの流体圧を、内蔵した圧力センサで電 気信号に変換したものとして、シーケンサやコンピュータ等の制御機器側に出力 している。 この場合、上記モニタ出力は、出力ポートの流体圧を変換した電気信号である から、この値が入力電気信号に対応する所定の流体圧になっているか否かを判断 するためには、上記制御機器に電気流体圧レギュレータの「入力電気信号−出力 圧」特性を考慮した流体圧の許容範囲のデータを入力しておく必要があり、これ には高いイニシャルコストと工数とを必要とする。 したがって、流体圧の異常を簡単に検出できる手段が要望されている。Conventionally, as shown in FIG. 10, the above-mentioned known electro-hydraulic regulator has an operation monitor in which the fluid pressure at the output port of the regulator is converted into an electric signal by a built-in pressure sensor. It is output to the control devices such as sequencers and computers. In this case, the monitor output is an electric signal obtained by converting the fluid pressure at the output port.Therefore, in order to determine whether this value is the predetermined fluid pressure corresponding to the input electric signal, the control signal It is necessary to input the data of the permissible range of the fluid pressure in consideration of the “input electric signal-output pressure” characteristic of the electro-hydraulic regulator, which requires high initial cost and man-hours. Therefore, there is a demand for means that can easily detect an abnormality in fluid pressure.
【０００４】[0004]
本考案が解決しようとする課題は、入力電気信号に対する出力流体圧が正常か 否かを検出する出力流体圧の異常検出回路、及びこの異常検出回路を組み込んだ 電気流体圧レギュレータを提供することにある。 The problem to be solved by the present invention is to provide an output fluid pressure abnormality detection circuit for detecting whether or not the output fluid pressure with respect to an input electric signal is normal, and an electric fluid pressure regulator incorporating this abnormality detection circuit. is there.
【０００５】[0005]
上記課題を解決するため、本考案の流体圧の異常検出回路は、設定流体圧に対 応する入力電気信号と、出力流体圧を変換した出力電気信号とが入力される差動 増幅回路と、該差動増幅回路の出力信号を整流する全波整流回路と、許容偏差信 号を出力する許容偏差設定回路と、上記全波整流回路と許容偏差設定回路とが出 力する電気信号を比較する比較回路と、上記比較回路で比較した電気信号の偏差 が所定の許容範囲内のときは導通し、上記許容範囲を超えたときは非導通となる 出力回路とを備えていることを特徴としている。 また、同様の課題を解決するため、上記流体圧の異常検出回路が、全波整流回 路と比較回路の間に、設定流体圧の変更直後の過渡的偏差の検出を防止する遅延 回路を設けたことを特徴としている。 In order to solve the above problems, a fluid pressure abnormality detection circuit of the present invention comprises a differential amplifier circuit to which an input electric signal corresponding to a set fluid pressure and an output electric signal obtained by converting the output fluid pressure are input. A full-wave rectification circuit that rectifies the output signal of the differential amplifier circuit, a tolerance deviation setting circuit that outputs a tolerance deviation signal, and an electric signal output by the full-wave rectification circuit and the tolerance deviation setting circuit are compared. It is characterized by including a comparison circuit and an output circuit which is conductive when the deviation of the electric signals compared by the comparison circuit is within a predetermined allowable range and which is non-conductive when the deviation exceeds the allowable range. . Further, in order to solve the same problem, the fluid pressure abnormality detection circuit is provided with a delay circuit between the full-wave rectification circuit and the comparison circuit to prevent detection of a transient deviation immediately after the change of the set fluid pressure. It is characterized by that.
【０００６】 さらに、同様の課題を解決するため、流体圧の異常検出回路が、設定流体圧に 対応する入力電気信号と、出力流体圧を変換した出力電気号とがそれぞれ入力さ れる第１、第２の差動増幅回路と、それぞれ許容偏差信号を出力する第１、第２ の許容偏差設定回路と、入力電気信号が出力電気信号より大きい場合に第１の差 動増幅回路と第１の許容偏差設定回路とが出力する電気信号を比較して、その偏 差が所定の許容範囲内のときに信号を出力する第１の比較回路と、入力電気信号 が出力電気信号より小さい場合に第２の差動増幅回路と第２の許容偏差設定回路 とが出力する電気信号を比較して、その偏差が所定の許容範囲内のときに信号を 出力する第２の比較回路と、これらの比較回路のいずれかの信号によって出力す るＯＲ回路と、上記ＯＲ回路の信号によって導通し、信号が出力しないときは非 導通となる出力回路とを備えていることを特徴としている。Further, in order to solve the same problem, a fluid pressure abnormality detection circuit receives an input electric signal corresponding to a set fluid pressure and an output electric signal obtained by converting the output fluid pressure. A second differential amplifier circuit, first and second allowable deviation setting circuits for outputting the allowable deviation signals, respectively, and a first differential amplifier circuit and a first differential amplifier circuit when the input electric signal is larger than the output electric signal. A first comparison circuit that compares the electric signal output by the tolerance deviation setting circuit and outputs a signal when the deviation is within a predetermined tolerance range, and a first comparison circuit that outputs the signal when the input electric signal is smaller than the output electric signal The second comparison circuit, which compares the electric signals output from the second differential amplifier circuit and the second permissible deviation setting circuit, and outputs a signal when the deviation is within a predetermined permissible range, and these comparison circuits. Output by any signal of the circuit It is characterized by comprising an OR circuit and an output circuit which is made conductive by the signal of the OR circuit and becomes non-conductive when no signal is output.
【０００７】 また、同様の課題を解決するため、上記異常検出回路のいずれかを、圧力流体 の供給ポート、出力ポート及び排出ポートを有し、アクチュエータへの通電及び その解除によって出力ポートを供給ポートと排出ポートとに切換えて連通させる 制御弁と、上記ソレノイドの通電を制御する制御回路と、出力ポートの流体圧を 電気信号に変換して出力する圧力センサとを備えた電気流体圧レギュレータに組 み込んだことを特徴としている。In order to solve the same problem, any one of the above abnormality detection circuits has a pressure fluid supply port, an output port, and a discharge port, and the output port is supplied by energizing and deenergizing the actuator. Combined with a control valve for switching and communicating with the discharge port and a discharge port, a control circuit for controlling energization of the solenoid, and a pressure sensor for converting the fluid pressure at the output port into an electrical signal and outputting the electrical signal. It is characterized by the inclusion.
【０００８】[0008]
差動増幅回路において、該回路に入力された設定流体圧に対応する入力電気信 号と出力流体圧を変換した出力電気信号との偏差を検出し、全波整流回路におい てその信号を整流し、比較回路において、この信号と許容偏差設定回路に設定し た許容偏差信号とを比較して、これらの信号の偏差が予め定めた許容範囲内のと きは出力回路を導通し、許容範囲を超えたときは出力回路を非導通とする。 したがって、制御機器側と関係がない上記３つの信号によって出力流体圧が正 常か否かを検出することができるので、判断操作が簡単である。 また、全波整流回路と比較回路との間に設けた遅延回路によって、設定流体圧 の変更直後の過渡的な偏差を、異常偏差として検出することを防止できる。 In the differential amplifier circuit, the deviation between the input electrical signal corresponding to the set fluid pressure input to the circuit and the output electrical signal obtained by converting the output fluid pressure is detected, and the full-wave rectifier circuit rectifies the signal. In the comparison circuit, this signal is compared with the allowable deviation signal set in the allowable deviation setting circuit, and if the deviation of these signals is within the predetermined allowable range, the output circuit is turned on and the allowable range is set. When it exceeds, the output circuit is turned off. Therefore, it is possible to detect whether or not the output fluid pressure is normal by the above-mentioned three signals that are not related to the control device side, and the judgment operation is simple. Further, the delay circuit provided between the full-wave rectification circuit and the comparison circuit can prevent the transient deviation immediately after the change of the set fluid pressure from being detected as an abnormal deviation.
【０００９】 さらに、入力電気信号が出力電気信号より大きい場合に異常を検出する、第１ の差動増幅回路、第１の許容偏差設定回路、及び第１の比較回路と、入力電気信 号が出力電気信号より小さい場合に異常を検出する、第２の差動増幅回路、第２ の許容偏差設定回路、及び第２の比較回路と、ＯＲ回路とを有するので、流体圧 の許容偏差を、昇圧時と降圧時とで個別に設定及び検出することができる。Further, the first differential amplifier circuit, the first permissible deviation setting circuit, and the first comparison circuit, which detect an abnormality when the input electric signal is larger than the output electric signal, and the input electric signal are Since the second differential amplifier circuit, the second permissible deviation setting circuit, the second comparison circuit, and the OR circuit that detect an abnormality when it is smaller than the output electric signal are included, the permissible deviation of the fluid pressure is It can be set and detected individually for boosting and for stepping down.
【００１０】[0010]
図１ないし図４は本考案の第１実施例を示し、この流体圧の異常検出回路１は 、設定流体圧に対応する入力電気信号ＶREF と出力流体圧を変換した出力電気信 号ＶSEN とが入力される差動増幅回路２と、差動増幅回路２が出力する信号を整 流する全波整流回路３と、全波整流回路３が出力する信号の遅延回路４と、予め 設定した出力流体圧の許容偏差信号を出力する許容偏差設定回路５と、遅延回路 ４と許容偏差設定回路５とが出力する電気信号を比較する比較回路６と、比較回 路６で比較した上記２つの信号の偏差が所定の許容範囲内のときは導通し、上記 許容範囲を超えたときは非導通となる出力回路７とを備えている。 そして、上記遅延回路４及び許容偏差設定回路５は、遅延時間及び許容偏差範 囲が変更可能とされている（図２参照）。1 to 4 show a first embodiment of the present invention, in which an abnormality detection circuit 1 for fluid pressure includes an output electrical signal V SEN obtained by converting an input electrical signal V REF corresponding to a set fluid pressure and an output fluid pressure. Is input, a full-wave rectifier circuit 3 for rectifying the signal output by the differential amplifier circuit 2, and a delay circuit 4 for the signal output by the full-wave rectifier circuit 3, which are set in advance. The allowable deviation setting circuit 5 for outputting the allowable deviation signal of the output fluid pressure, the comparison circuit 6 for comparing the electric signals output by the delay circuit 4 and the allowable deviation setting circuit 5, and the above-mentioned two compared by the comparison circuit 6 An output circuit 7 is provided which is conductive when the signal deviation is within a predetermined allowable range and is non-conductive when the signal deviation exceeds the allowable range. The delay circuit 4 and the allowable deviation setting circuit 5 can change the delay time and the allowable deviation range (see FIG. 2).
【００１１】 上記遅延回路４は、設定流体圧を変更した直後の過渡的偏差を異常偏差として 検出することを防止するためのものであり、遅延回路４を設けないときは、図３ に示すように、全波整流回路３の信号が一時的に許容偏差を超えて異常となるこ とがあるが、遅延回路４を設けると、図４に示すように過渡的偏差を異常偏差と して検出することを防止できる。The delay circuit 4 is for preventing detection of a transient deviation immediately after changing the set fluid pressure as an abnormal deviation, and when the delay circuit 4 is not provided, as shown in FIG. In some cases, the signal of the full-wave rectifier circuit 3 may temporarily exceed the allowable deviation and become abnormal. However, if the delay circuit 4 is provided, the transient deviation is detected as an abnormal deviation as shown in FIG. Can be prevented.
【００１２】 上記第１実施例は、比較回路６において、該回路に入力された遅延回路４の信 号と許容偏差設定回路５の偏差信号との大小を比較して、これらの電気信号の差 が許容範囲を超えているときは出力回路７が非導通となるので、流体圧の異常を 検出することができる（図５参照）。In the first embodiment, the comparison circuit 6 compares the magnitude of the signal of the delay circuit 4 and the deviation signal of the allowable deviation setting circuit 5 which are input to the circuit, and compares the difference between these electric signals. When exceeds the permissible range, the output circuit 7 becomes non-conductive, so that an abnormality in the fluid pressure can be detected (see FIG. 5).
【００１３】 図６及び図７は本考案の第２実施例を示し、この異常検出回路１１は、設定流 体圧に対応する入力電気信号ＶREF と出力流体圧を変換した出力電気信号ＶSEN とが入力される第１、第２の差動増幅回路１２ａ，１２ｂと、第１、第２の遅延 回路１３ａ，１３ｂと、予め個別に設定した出力流体圧の許容偏差信号を出力す る第１、第２の許容偏差設定回路１４ａ，１４ｂと、上記第１、第２の遅延回路 １３ａ，１３ｂと第１、第２の許容偏差設定回路１４ａ，１４ｂとが出力する信 号を個別に比較して、これらの電気信号の偏差が所定の許容範囲内のときは信号 を出力する第１、第２の比較回路１５ａ，１５ｂと、２つの比較回路１５ａ，１ ５ｂのいずれかからの信号によって出力するＯＲ回路１６と、ＯＲ回路１６の信 号によって導通し、ＯＲ回路１６の信号出力がないときは非導通となる上記出力 回路７とを備えている。FIG. 6 and FIG. 7 show a second embodiment of the present invention. This abnormality detection circuit 11 has an output electric signal V SEN obtained by converting an input electric signal V REF corresponding to a set fluid pressure and an output fluid pressure. The first and second differential amplifier circuits 12a and 12b to which is input, the first and second delay circuits 13a and 13b, and the first output differential pressure tolerance deviation signal that is individually set. The signals output from the first and second allowable deviation setting circuits 14a and 14b and the first and second delay circuits 13a and 13b and the first and second allowable deviation setting circuits 14a and 14b are individually compared. Then, when the deviation of these electric signals is within a predetermined allowable range, a signal from either of the first and second comparison circuits 15a and 15b and the two comparison circuits 15a and 15b which outputs a signal The output of the OR circuit 16 and the signal of the OR circuit 16 Conducts I, when there is no signal output from the OR circuit 16 is provided with the above-described output circuit 7 becomes non-conductive.
【００１４】 上記第１の各回路１２ａ，１３ａ，１４ａ，１５ａは、入力電気信号ＶREF が 出力電気信号ＶSEN より大きい場合に、比較回路１５ａが２つの信号を比較して 異常の有無を検出し、第２の各回路１２ｂ，１３ｂ，１４ｂ，１５ｂは、入力電 気信号ＶREF が出力電気信号ＶSEN より小さい場合に、比較回路１５ｂが２つの 信号を比較して異常の有無を検出するものとして構成されている。 したがって、第２実施例は、許容偏差及び遅延時間を、昇圧時と降圧時とに分 けて個別に設定することができる。 第２実施例の他の構成及び作用は第１実施例と同じであるから、詳細な説明は 省略する。In each of the first circuits 12a, 13a, 14a, 15a, when the input electric signal V REF is larger than the output electric signal V SEN , the comparison circuit 15a compares the two signals to detect the presence or absence of abnormality. Then, in each of the second circuits 12b, 13b, 14b, 15b, when the input electric signal V REF is smaller than the output electric signal V SEN , the comparison circuit 15b compares the two signals and detects the presence or absence of abnormality. Is configured as one. Therefore, in the second embodiment, the allowable deviation and the delay time can be set separately for the boosting and the bucking. Since the other structure and operation of the second embodiment are the same as those of the first embodiment, detailed description will be omitted.
【００１５】 図８は、第１実施例または第２実施例の異常検出回路１または１１が組み込ま れる電気流体圧レギュレータの一例としての、電気空気圧レギュレータの構成図 を示し、この電気空気圧レギュレータ２０は、制御弁２１と、該制御弁のソレノ イド２２の通電を制御する制御回路２３と、出力空気圧を電気信号に変換する圧 力センサ２４とを備えている。 上記制御弁２１は、圧縮空気の供給ポートＰ、出力ポートＡ及び排出ポートＲ を有し、制御回路２３によるソレノイド２２の通電とその解除とによって、出力 ポートＡを供給ポートＰと排出ポートＲとに切換えて連通させる周知の３ポート 電磁弁として構成されており、入力電気信号ＶREF と出力電気信号ＶSEN は、制 御回路２３から差動増幅回路２または１２ａ及び１２ｂに入力される。 なお、上記制御回路２２は、入力電気信号ＶREF 及び出力電気信号ＶSEN を上 記差動増幅回路に出力する以外は、公知の電気空気圧レギュレータの制御回路と 同じであるから、詳細な説明は省略する。FIG. 8 shows a configuration diagram of an electro-pneumatic pressure regulator as an example of the electro-hydraulic pressure regulator in which the abnormality detection circuit 1 or 11 of the first embodiment or the second embodiment is incorporated. 1, a control valve 21, a control circuit 23 for controlling energization of the solenoid 22 of the control valve, and a pressure sensor 24 for converting output air pressure into an electric signal. The control valve 21 has a compressed air supply port P, an output port A, and an exhaust port R. The control circuit 23 energizes and deenergizes the solenoid 22 to connect the output port A to the supply port P and the exhaust port R. The input electric signal V REF and the output electric signal V SEN are input from the control circuit 23 to the differential amplifier circuits 2 or 12a and 12b. The control circuit 22 is the same as the control circuit of a known electro-pneumatic regulator except that it outputs the input electric signal V REF and the output electric signal V SEN to the above differential amplifier circuit. Omit it.
【００１６】 上記第１実施例または第２実施例の異常検出回路１または１１を組み込んだ、 図９に示す電気空気圧レギュレータ２０は、該レギュレータ側において出力流体 圧が異常か否かを判断できるので、シーケンサやコンピュータ等の入力電気信号 の制御機器における異常の判断が容易であり、しかも制御機器に予め出力流体圧 の許容範囲のデータを入力しておく必要がないので、安価なものとすることがで きる。The electro-pneumatic regulator 20 shown in FIG. 9 incorporating the abnormality detection circuit 1 or 11 of the first or second embodiment can determine whether or not the output fluid pressure is abnormal on the regulator side. Since it is easy to determine the abnormality in the control device of the input electric signal such as sequencer or computer, and it is not necessary to input the data of the allowable range of the output fluid pressure to the control device in advance, it should be inexpensive. You can
【００１７】[0017]
本考案の流体圧の異常検出回路は、制御機器側と関係なく異常を検出できるの で、異常の判断操作が簡単であり、しかも制御機器に予め出力流体圧の許容範囲 のデータを入力しておく必要がないので、安価なものとすることができる。 また、遅延回路によって、設定圧の変更直後における一時的な偏差を、出力流 体圧の異常として検出することを防止できる。 さらに、２つの差動増幅回路、許容偏差設定回路及び比較回路を設けたので、 出力流体圧の許容偏差を、昇圧時と降圧時とに分けて個別に設定することができ る。 Since the fluid pressure abnormality detection circuit of the present invention can detect an abnormality regardless of the control device side, the operation for determining an abnormality is easy, and the data of the allowable output fluid pressure range is input to the control device in advance. Since it is not necessary to store it, it can be made inexpensive. Further, the delay circuit can prevent the temporary deviation immediately after the change of the set pressure from being detected as an abnormality of the output fluid pressure. Further, since the two differential amplifier circuits, the allowable deviation setting circuit, and the comparison circuit are provided, the allowable deviation of the output fluid pressure can be set separately for increasing and decreasing pressure.
【提出日】平成５年９月２日[Submission date] September 2, 1993
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００６[Correction target item name] 0006
【補正方法】変更[Correction method] Change
【０００６】 さらに、同様の課題を解決するため、流体圧の異常検出回 路が、設定流体圧に対応する入力電気信号と、出力流体圧を変換した出力電気信 号とがそれぞれ入力される第１、第２の差動増幅回路と、それぞれ許容偏差信号 を出力する第１、第２の許容偏差設定回路と、入力電気信号が出力電気信号より 大きい場合に第１の差動増幅回路と第１の許容偏差設定回路とが出力する電気信 号を比較して、その偏差が所定の許容範囲内のときに信号を出力する第１の比較 回路と、入力電気信号が出力電気信号より小さい場合に第２の差動増幅回路と第 ２の許容偏差設定回路とが出力する電気信号を比較して、その偏差が所定の許容 範囲内のときに信号を出力する第２の比較回路と、これらの比較回路のいずれか の信号によって出力するＯＲ回路と、上記ＯＲ回路の信号によって導通し、信号 が出力しないときは非導通となる出力回路とを備えていることを特徴としている 。Furthermore, to solve the same problem, the abnormality detection circuits of the fluid pressure, an input electrical signal corresponding to the set point fluid pressure, an output electrical signal converted from the output fluid pressure is inputted respectively First and second differential amplifier circuits, first and second allowable deviation setting circuits that output the allowable deviation signals respectively, and the first differential amplifier circuit and the first differential amplifier circuit when the input electric signal is larger than the output electric signal. When the input electric signal is smaller than the output electric signal and the first comparison circuit that compares the electric signal output by the allowable deviation setting circuit No. 1 and outputs the signal when the deviation is within the predetermined allowable range And a second comparison circuit which compares the electric signals output from the second differential amplifier circuit and the second allowable deviation setting circuit and outputs a signal when the deviation is within a predetermined allowable range. Output by any one of the An OR circuit, and turned on by the signal of the OR circuit, when the signal is not output is characterized by comprising an output circuit which becomes non-conductive.
【図１】第１実施例のブロック図である。FIG. 1 is a block diagram of a first embodiment.
【図２】同じく構成図である。FIG. 2 is a configuration diagram of the same.
【図３】遅延回路がない場合の説明図である。FIG. 3 is an explanatory diagram when there is no delay circuit.
【図４】遅延回路の作用の説明図である。FIG. 4 is an explanatory diagram of an operation of a delay circuit.
【図５】設定圧力が異常な場合の説明図である。FIG. 5 is an explanatory diagram when the set pressure is abnormal.
【図６】第２実施例のブロック図である。FIG. 6 is a block diagram of a second embodiment.
【図７】同じく構成図である。FIG. 7 is a configuration diagram of the same.
【図８】電気空気圧レギュレータの構成図である。FIG. 8 is a configuration diagram of an electric pneumatic regulator.
【図９】異常検出回路を組み込んだ上記レギュレータの
構成図である。FIG. 9 is a configuration diagram of the regulator including an abnormality detection circuit.
【図１０】公知の電気流体圧レギュレータのブロック線
図である。FIG. 10 is a block diagram of a known electrohydraulic regulator.
１，１１ 異常検出回路 ２，１２ａ，１２ｂ 差動増幅回路 ３ 全波整流回路 ４，１３ａ，１３ｂ 遅延回路 ５，１４ａ，１４ｂ 許容偏差設定回路 ６，１５ａ，１５ｂ 比較回路 ７ 出力回路 １６ ＯＲ回路 ２０ 電気空気圧レギュレータ ２１ 制御弁 ２２ ソレノイド ２３ 制御回路 ２４ 圧力センサ 1, 11 Abnormality detection circuit 2, 12a, 12b Differential amplification circuit 3 Full wave rectification circuit 4, 13a, 13b Delay circuit 5, 14a, 14b Allowable deviation setting circuit 6, 15a, 15b Comparison circuit 7 Output circuit 16 OR circuit 20 Electropneumatic regulator 21 Control valve 22 Solenoid 23 Control circuit 24 Pressure sensor
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年９月２日[Submission date] September 2, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】請求項３[Name of item to be corrected] Claim 3
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【手続補正３】[Procedure 3]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図６[Name of item to be corrected] Figure 6
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図６】 [Figure 6]
【手続補正４】[Procedure amendment 4]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図７[Name of item to be corrected] Figure 7
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図７】 [Figure 7]
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図１０[Name of item to be corrected] Fig. 10
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１０】 [Figure 10]
Claims (4)
出力流体圧を変換した出力電気信号とが入力される差動
増幅回路と、 該差動増幅回路の出力信号を整流する全波整流回路と、 許容偏差信号を出力する許容偏差設定回路と、 上記全波整流回路と許容偏差設定回路とが出力する電気
信号を比較する比較回路と、 上記比較回路で比較した電気信号の偏差が所定の許容範
囲内のときは導通し、 上記許容範囲を超えたときは非導通となる出力回路とを
備えている、 ことを特徴とする流体圧の異常検出回路。1. An input electrical signal corresponding to a set fluid pressure,
A differential amplifier circuit to which an output electric signal obtained by converting the output fluid pressure is input, a full-wave rectifier circuit that rectifies the output signal of the differential amplifier circuit, a tolerance deviation setting circuit that outputs a tolerance deviation signal, and A comparison circuit that compares the electric signals output by the full-wave rectifier circuit and the allowable deviation setting circuit, and if the deviation of the electric signals compared by the comparison circuit is within a predetermined allowable range, the circuit is conductive and exceeds the allowable range. An abnormality detection circuit for fluid pressure, comprising: an output circuit which is non-conducting at times.
体圧の変更直後の過渡的偏差の検出を防止する遅延回路
を設けた、 ことを特徴とする請求項１に記載した流体圧の異常検出
回路。2. The fluid pressure according to claim 1, further comprising a delay circuit provided between the full-wave rectification circuit and the comparison circuit to prevent detection of a transient deviation immediately after the change of the set fluid pressure. Abnormality detection circuit.
出力流体圧を変換した出力電気号とがそれぞれ入力され
る第１、第２の差動増幅回路と、 それぞれ許容偏差信号を出力する第１、第２の許容偏差
設定回路と、 入力電気信号が出力電気信号より大きい場合に第１の差
動増幅回路と第１の許容偏差設定回路とが出力する電気
信号を比較して、その偏差が所定の許容範囲内のときに
信号を出力する第１の比較回路と、 入力電気信号が出力電気信号より小さい場合に第２の差
動増幅回路と第２の許容偏差設定回路とが出力する電気
信号を比較して、その偏差が所定の許容範囲内のときに
信号を出力する第２の比較回路と、 これらの比較回路のいずれかの信号によって出力するＯ
Ｒ回路と、 上記ＯＲ回路の信号によって導通し、信号が出力しない
ときは非導通となる出力回路とを備えている、 ことを特徴とする流体圧の異常検出回路。3. An input electrical signal corresponding to a set fluid pressure,
The first and second differential amplifier circuits to which the output electric signal obtained by converting the output fluid pressure is respectively input, the first and second allowable deviation setting circuits which respectively output the allowable deviation signal, and the input electric signal are A first differential amplifier circuit compares the electric signals output by the first allowable deviation setting circuit when the difference is larger than the output electric signal, and outputs a signal when the deviation is within a predetermined allowable range. And the electric signal output by the second differential amplifier circuit and the second permissible deviation setting circuit when the input electric signal is smaller than the output electric signal, and the deviation is within a predetermined permissible range. And a second comparison circuit that outputs a signal at the time of
A fluid pressure abnormality detection circuit, comprising: an R circuit; and an output circuit that is made conductive by the signal of the OR circuit and becomes non-conductive when no signal is output.
した流体圧の異常検出回路を、 圧力流体の供給ポート、出力ポート及び排出ポートを有
し、アクチュエータへの通電及びその解除によって出力
ポートを供給ポートと排出ポートとに切換えて連通させ
る制御弁と、上記ソレノイドの通電を制御する制御回路
と、出力ポートの流体圧を電気信号に変換して出力する
圧力センサとを備えた電気流体圧レギュレータに組み込
んだ、 ことを特徴とする電気流体圧レギュレータ。4. The fluid pressure abnormality detection circuit according to claim 1, having a pressure fluid supply port, an output port, and a discharge port, and outputting by energizing and deactivating the actuator. An electrical fluid including a control valve for switching the port to a supply port and a discharge port for communication, a control circuit for controlling energization of the solenoid, and a pressure sensor for converting the fluid pressure at the output port into an electrical signal and outputting the electrical signal. An electro-hydraulic pressure regulator characterized by being incorporated in a pressure regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993044685U JP2579518Y2 (en) | 1993-07-23 | 1993-07-23 | Fluid pressure abnormality detection circuit and electro-hydraulic pressure regulator having the circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993044685U JP2579518Y2 (en) | 1993-07-23 | 1993-07-23 | Fluid pressure abnormality detection circuit and electro-hydraulic pressure regulator having the circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0713013U true JPH0713013U (en) | 1995-03-03 |
| JP2579518Y2 JP2579518Y2 (en) | 1998-08-27 |
Family
ID=12698292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993044685U Expired - Fee Related JP2579518Y2 (en) | 1993-07-23 | 1993-07-23 | Fluid pressure abnormality detection circuit and electro-hydraulic pressure regulator having the circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2579518Y2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS484016U (en) * | 1971-05-23 | 1973-01-18 | ||
| JPS484113U (en) * | 1971-05-28 | 1973-01-18 | ||
| JPS484112U (en) * | 1971-05-26 | 1973-01-18 | ||
| JPS5011918U (en) * | 1973-06-04 | 1975-02-06 | ||
| JP2003186543A (en) * | 2001-11-23 | 2003-07-04 | Siemens Ag | Position adjustment method for operation valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6298408A (en) * | 1985-10-24 | 1987-05-07 | Idemitsu Kosan Co Ltd | Method and device for automatically controlling pressure |
| JPH0248208A (en) * | 1988-08-09 | 1990-02-19 | Kayaba Ind Co Ltd | Hydraulic circuit of active suspension |
| JPH02177658A (en) * | 1988-09-13 | 1990-07-10 | Fujitsu Ltd | Data source and sink |
| JPH03116913A (en) * | 1989-09-29 | 1991-05-17 | Meidensha Corp | Abnormality monitoring and diagnosing device for on-load tap change-over device |
| JP3037511U (en) * | 1996-11-07 | 1997-05-20 | 浩司 林 | Mounting device for portable optical disc player |
-
1993
- 1993-07-23 JP JP1993044685U patent/JP2579518Y2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6298408A (en) * | 1985-10-24 | 1987-05-07 | Idemitsu Kosan Co Ltd | Method and device for automatically controlling pressure |
| JPH0248208A (en) * | 1988-08-09 | 1990-02-19 | Kayaba Ind Co Ltd | Hydraulic circuit of active suspension |
| JPH02177658A (en) * | 1988-09-13 | 1990-07-10 | Fujitsu Ltd | Data source and sink |
| JPH03116913A (en) * | 1989-09-29 | 1991-05-17 | Meidensha Corp | Abnormality monitoring and diagnosing device for on-load tap change-over device |
| JP3037511U (en) * | 1996-11-07 | 1997-05-20 | 浩司 林 | Mounting device for portable optical disc player |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS484016U (en) * | 1971-05-23 | 1973-01-18 | ||
| JPS484112U (en) * | 1971-05-26 | 1973-01-18 | ||
| JPS5350651Y2 (en) * | 1971-05-26 | 1978-12-05 | ||
| JPS484113U (en) * | 1971-05-28 | 1973-01-18 | ||
| JPS5011918U (en) * | 1973-06-04 | 1975-02-06 | ||
| JP2003186543A (en) * | 2001-11-23 | 2003-07-04 | Siemens Ag | Position adjustment method for operation valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2579518Y2 (en) | 1998-08-27 |
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