JPH091617A - Device for measuring temperature of molding machine - Google Patents
Device for measuring temperature of molding machineInfo
- Publication number
- JPH091617A JPH091617A JP15473695A JP15473695A JPH091617A JP H091617 A JPH091617 A JP H091617A JP 15473695 A JP15473695 A JP 15473695A JP 15473695 A JP15473695 A JP 15473695A JP H091617 A JPH091617 A JP H091617A
- Authority
- JP
- Japan
- Prior art keywords
- switching means
- thermocouple
- turned
- temperature
- temperature detection
- 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
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、射出成形機やダイカス
トマシン等の成形機の温度測定装置に係り、特に、金属
製の加熱シリンダ等の導電体よりなる温度検出対象に、
不慮の事態により過電圧が流れても、温度検出系ＩＣを
破壊することがないようにした、回路保護性に優れた成
形機の温度測定装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature measuring device for a molding machine such as an injection molding machine or a die casting machine, and more particularly to a temperature detection target made of a conductor such as a metal heating cylinder.
The present invention relates to a temperature measuring device for a molding machine, which is excellent in circuit protection and prevents the temperature detection system IC from being destroyed even when an overvoltage flows due to an unforeseen situation.
【０００２】[0002]
【従来の技術】射出成形機の加熱シリンダの各部は、加
熱シリンダ内に投入された樹脂材料を良好に可塑化・溶
融するために、予め設定された温度に正確にコントロー
ルすることが求められる。このため、バンドヒーターで
加熱された金属製の加熱シリンダの各部の温度を検出し
て、温度制御系回路にフィードバックするために、加熱
シリンダの各部には温度センサとしての熱電対が埋設さ
れている。2. Description of the Related Art Each part of a heating cylinder of an injection molding machine is required to be accurately controlled at a preset temperature in order to favorably plasticize and melt the resin material charged in the heating cylinder. Therefore, in order to detect the temperature of each part of the metal heating cylinder heated by the band heater and feed it back to the temperature control system circuit, a thermocouple as a temperature sensor is embedded in each part of the heating cylinder. .
【０００３】図２は、従来の射出成形機の加熱シリンダ
の温度検出系の構成を示すブロック図である。同図にお
いて、２１は接地型の熱電対、２２はオペアンプ、２３
はセレクタ回路、２４はＡ／Ｄ変換回路、２５は演算制
御部（ＣＰＵ部）である。熱電対２１およびオペアンプ
２２は、加熱シリンダの各測定部位に対応した数が設け
られ、ここでは例えば、Ａ〜Ｆの６チャンネルが設けら
れている。FIG. 2 is a block diagram showing the structure of a temperature detecting system of a heating cylinder of a conventional injection molding machine. In the figure, 21 is a ground type thermocouple, 22 is an operational amplifier, and 23.
Is a selector circuit, 24 is an A / D conversion circuit, and 25 is an arithmetic control unit (CPU unit). The thermocouple 21 and the operational amplifier 22 are provided in a number corresponding to each measurement portion of the heating cylinder, and here, for example, six channels A to F are provided.
【０００４】各熱電対２１で発生した電圧（熱起電力）
は、対応するオペアンプ２２において増幅・整形等の適
宜の処理を施された後、セレクタ回路２３の各入力端に
入力される。そして、演算制御部２５からの制御信号に
よって切り替えられるセレクタ回路２３から、順次択一
的に１つのチャンネルの検出電圧がＡ／Ｄ変換回路２４
に出力され、これがディジタル信号に変換されて演算制
御部２５に取り込まれる。これによって、演算制御部２
５は加熱シリンダの各部の温度を認知し、各部の温度が
予め設定された温度値と一致するように、加熱シリンダ
の各部に配設されたバンドヒーターのドライバ回路を制
御するようになっている。Voltage generated by each thermocouple 21 (thermoelectromotive force)
Is subjected to appropriate processing such as amplification and shaping in the corresponding operational amplifier 22, and then input to each input terminal of the selector circuit 23. Then, from the selector circuit 23 that is switched by the control signal from the arithmetic control unit 25, the detection voltage of one channel is sequentially and alternately selected and the A / D conversion circuit 24 is detected.
Is output to, and is converted into a digital signal and taken into the arithmetic control unit 25. As a result, the arithmetic control unit 2
Reference numeral 5 recognizes the temperature of each part of the heating cylinder and controls the driver circuit of the band heater arranged in each part of the heating cylinder so that the temperature of each part coincides with a preset temperature value. .
【０００５】[0005]
【発明が解決しようとする課題】ところで、加熱シリン
ダは導電性の金属によって形成されているため、バンド
ヒーターが故障して、漏電等によってヒーター駆動用電
圧（ＡＣ２００Ｖ〜ＡＣ４００Ｖ）が加熱シリンダを介
して熱電対２１に印加されると、温度検出系ＩＣ（オペ
アンプ２２やＡ／Ｄ変換回路２４等）が破壊されてしま
うという問題があった。By the way, since the heating cylinder is made of a conductive metal, the band heater fails, and the voltage for driving the heater (AC200V to AC400V) is passed through the heating cylinder due to leakage or the like. When applied to the thermocouple 21, there is a problem that the temperature detection system IC (the operational amplifier 22, the A / D conversion circuit 24, etc.) is destroyed.
【０００６】これに対処する手法としては、 温度検出系回路を、電気的に加熱シリンダと絶縁する
手法。すなわち具体的には、接地型の熱電対２１に代え
て、非接地型の温度センサ（熱電対）を用いる手法。 温度検出系ＩＣに高耐電圧のＩＣを用いる手法。すな
わち具体的には、オペアンプ２２に、ＡＣ２００Ｖ〜Ａ
Ｃ４００Ｖに耐え得る高耐電圧ＩＣを使用する手法。 が考えられる。As a method of coping with this, a method of electrically insulating the temperature detection system circuit from the heating cylinder. That is, specifically, a method of using a non-grounded temperature sensor (thermocouple) instead of the grounded thermocouple 21. A method of using a high withstand voltage IC for the temperature detection system IC. That is, specifically, the operational amplifier 22 has AC200V to A
A method of using a high withstand voltage IC that can withstand C400V. Can be considered.
【０００７】しかしながら、上記の手法においては、
絶縁物を介して導電性金属よりなる加熱シリンダの温度
を検出するので、浮遊容量による電気伝導（サージ）で
温度検出系ＩＣが破壊される事故がないとは言い切れな
い（発生頻度約２％）。また、非接地型の温度センサは
接地型の熱電対２１に較べて、検出精度が劣る上、価格
も高い（約１．５倍高い）という問題がある。However, in the above method,
Since the temperature of the heating cylinder made of conductive metal is detected through the insulator, it cannot be said that there is no accident that the temperature detection system IC is destroyed by electric conduction (surge) due to stray capacitance (occurrence frequency of about 2% ). Further, the non-grounded type temperature sensor has a problem that the detection accuracy is inferior to that of the grounded type thermocouple 21 and the price is high (about 1.5 times higher).
【０００８】一方、前記の手法を採用すると、高耐電
圧のＩＣは極めて高価であるため、システム全体のコス
トを押し上げるという問題がある。On the other hand, if the above-mentioned method is adopted, there is a problem that the cost of the entire system is increased because an IC having a high withstand voltage is extremely expensive.
【０００９】本発明は上記の点に鑑みなされたもので、
その目的とするところは、安価で検出精度のよい接地型
の熱電対を用いた成形機の温度測定装置において、金属
製の加熱シリンダ等の導電体よりなる温度検出対象に、
不慮の事態により過電圧が流れても、温度検出系ＩＣを
破壊する虞がなく、かつ、全体を安価なものに構築でき
る温度測定装置を提供することにある。The present invention has been made in view of the above points,
The purpose is to measure the temperature of a molding machine using a ground-type thermocouple that is inexpensive and has good detection accuracy, and to a temperature detection target made of a conductor such as a metal heating cylinder,
It is an object of the present invention to provide a temperature measuring device that does not damage the temperature detection system IC even when an overvoltage flows due to an unforeseen situation and that can be constructed inexpensively.
【００１０】[0010]
【課題を解決するための手段】本発明は上記した目的を
達成するため、電熱ヒーターで加熱される導電体の被温
度検出部位に、接地型の熱電対を配設し、該熱電対の出
力する電圧値を適宜に変換処理して温度測定を行う成形
機の温度測定装置において、上記熱電対を、高耐電圧の
ＭＯＳＦＥＴを１対用いた第１のスイッチング手段に接
続すると共に、該第１のスイッチング手段を、コンデン
サを介して、高耐電圧のＭＯＳＦＥＴを１対用いた第２
のスイッチング手段に接続し、上記第２のスイッチング
手段をオフにした状態で、上記第１のスイッチング手段
をオンにして上記コンデンサをチャージし、このコンデ
ンサにチャージされた電荷を、上記第１のスイッチング
手段をオフにした状態で、上記第２のスイッチング手段
をオンにして、後段に出力するように、構成される。In order to achieve the above-mentioned object, the present invention provides a ground type thermocouple at a temperature detection portion of a conductor heated by an electric heater and outputs the thermocouple. In a temperature measuring device of a molding machine for appropriately converting a voltage value to be measured to measure a temperature, the thermocouple is connected to a first switching means using a pair of high withstand voltage MOSFETs, and the first The switching means of the second through using a pair of high withstand voltage MOSFET through a capacitor
Connected to the switching means and turning off the second switching means, the first switching means is turned on to charge the capacitor, and the electric charge charged in the capacitor is transferred to the first switching means. With the means turned off, the second switching means is turned on and output to the subsequent stage.
【００１１】[0011]
【作用】高耐電圧のＭＯＳＦＥＴを１対用いた第１のス
イッチング手段と、コンデンサと、高耐電圧のＭＯＳＦ
ＥＴを１対用いた第２のスイッチング手段とで、いわゆ
るフライングキャパシタ回路を構成する。そして、この
フライングキャパシタ回路は、第１，第２のスイッチン
グ手段の一方が常にオフとなるようにコントロールされ
る。したがって、接地型の熱電対は、上記のフライング
キャパシタ回路を介して、後段回路（温度検出系ＩＣ）
と接続されるので、接地型の熱電対と温度検出系ＩＣと
は、電気的に絶縁されることになる。よって、金属製の
加熱シリンダ等の導電体よりなる温度検出対象に、不慮
の事態により過電圧が流れても、温度検出系ＩＣが破壊
される虞はなくなる。また、高耐電圧のＭＯＳＦＥＴを
４個とコンデンサ１個を用いたフライングキャパシタ回
路は、ＡＣ２００Ｖ〜ＡＣ４００Ｖに耐え得る高耐電圧
ＩＣに較べて格段に安価であり、温度測定装置全体のコ
ストを押し上げることもない。A first switching means using a pair of high withstand voltage MOSFETs, a capacitor, and a high withstand voltage MOSF.
A so-called flying capacitor circuit is configured by the second switching means using a pair of ETs. Then, the flying capacitor circuit is controlled so that one of the first and second switching means is always turned off. Therefore, the ground type thermocouple is connected to the latter stage circuit (temperature detection system IC) through the flying capacitor circuit.
Therefore, the ground type thermocouple and the temperature detection system IC are electrically insulated from each other. Therefore, even if an overvoltage flows to a temperature detection target made of a conductor such as a metal heating cylinder due to an accident, the temperature detection system IC is not likely to be destroyed. Further, the flying capacitor circuit using four high withstand voltage MOSFETs and one capacitor is significantly cheaper than a high withstand voltage IC capable of withstanding AC200V to AC400V, which increases the cost of the entire temperature measuring device. Nor.
【００１２】[0012]
【実施例】以下、本発明を図示した１実施例によって説
明する。図１は、本発明の１実施例に係る射出成形機の
加熱シリンダの温度検出系の構成を示すブロック図であ
る。同図において、１は接地型の熱電対、２はフライン
グキャパシタ回路、３は増幅機能を備えたＡ／Ｄ変換回
路、４は演算制御部（ＣＰＵ部）である。熱電対１およ
びフライングキャパシタ回路２は、加熱シリンダの各測
定部位に対応した数が設けられ、ここでは例えば、Ａ〜
Ｆの６チャンネルが設けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to one illustrated embodiment. FIG. 1 is a block diagram showing the configuration of a temperature detection system of a heating cylinder of an injection molding machine according to an embodiment of the present invention. In the figure, 1 is a ground type thermocouple, 2 is a flying capacitor circuit, 3 is an A / D conversion circuit having an amplifying function, and 4 is an arithmetic control unit (CPU unit). The thermocouple 1 and the flying capacitor circuit 2 are provided in a number corresponding to each measurement portion of the heating cylinder, and here, for example, A to
Six channels of F are provided.
【００１３】上記フライングキャパシタ回路２は、１対
の高耐電圧のＭＯＳＦＥＴ１１ａ，１１ｂを用いた第１
のスイッチング手段１１と、コンデンサ１２と、１対の
高耐電圧のＭＯＳＦＥＴ１３ａ，１３ｂを用いた第２の
スイッチング手段１３とによって構成されている。そし
て、熱電対１の出力は第１のスイッチング手段１１の入
力端に接続され、第１のスイッチング手段１１の出力は
コンデンサ１２を介して第２のスイッチング手段１３の
入力端に接続され、第２のスイッチング手段１３の出力
はＡ／Ｄ変換回路３の入力端に接続されている。The flying capacitor circuit 2 includes a first pair of high withstand voltage MOSFETs 11a and 11b.
Of the switching means 11, the capacitor 12, and the second switching means 13 using the pair of high withstand voltage MOSFETs 13a and 13b. The output of the thermocouple 1 is connected to the input end of the first switching means 11, the output of the first switching means 11 is connected to the input end of the second switching means 13 via the capacitor 12, and the second The output of the switching means 13 is connected to the input terminal of the A / D conversion circuit 3.
【００１４】各フライングキャパシタ回路２の第１のス
イッチング手段１１および第２のスイッチング手段１３
のオン／オフ状態は、演算制御部４からの制御信号によ
ってコントロールされ、第１のスイッチング手段１１が
オンのときには、第２のスイッチング手段１３はオフと
され（以下、これを第１のモードと称す）、第１のスイ
ッチング手段１１がオフのときには、第２のスイッチン
グ手段１３はオンとされるようになっている（以下、こ
れを第２のモードと称す）。The first switching means 11 and the second switching means 13 of each flying capacitor circuit 2
The ON / OFF state of is controlled by a control signal from the arithmetic and control unit 4, and when the first switching means 11 is on, the second switching means 13 is off (hereinafter, referred to as the first mode). When the first switching means 11 is off, the second switching means 13 is turned on (hereinafter referred to as the second mode).
【００１５】フライングキャパシタ回路２が上記第１の
モードをとった際には、第１のスイッチング手段１１が
オンとされるので、コンデンサ１２には熱電対１の出力
電圧がチャージされる。このとき、第２のスイッチング
手段１３はオフとなっているので、熱電対１とＡ／Ｄ変
換回路３とは電気的に絶縁されている。When the flying capacitor circuit 2 takes the first mode, the first switching means 11 is turned on, so that the capacitor 12 is charged with the output voltage of the thermocouple 1. At this time, since the second switching means 13 is off, the thermocouple 1 and the A / D conversion circuit 3 are electrically insulated.
【００１６】また、フライングキャパシタ回路２が上記
第２のモードをとった際には、第１のスイッチング手段
１１がオフとされ、第２のスイッチング手段１３がオン
とされるので、第１のモード時にコンデンサ１２にチャ
ージされた電荷（電圧）が、Ａ／Ｄ変換回路３に入力さ
れる。このとき、第１のスイッチング手段１１はオフと
なっているので、熱電対１とＡ／Ｄ変換回路３とは電気
的に絶縁されている。When the flying capacitor circuit 2 takes the second mode, the first switching means 11 is turned off and the second switching means 13 is turned on, so that the first mode is applied. At some time, the electric charge (voltage) charged in the capacitor 12 is input to the A / D conversion circuit 3. At this time, since the first switching means 11 is off, the thermocouple 1 and the A / D conversion circuit 3 are electrically insulated.
【００１７】本実施例では、前記Ａ〜Ｆの６チャンネル
の温度検出系統のうちの１つのチャンネルを、順次択一
選択して第２のモードをとらせ、他の５つのチャンネル
には第１のモードをとらせるようになっている。すなわ
ち、Ａチャンネルが第２のモードがとった際には、Ｂ〜
Ｆの５つのチャンネルは第１のモードをとり、Ｂチャン
ネルが第２のモードがとった際には、ＡおよびＣ〜Ｆの
５つのチャンネルは第１のモードをとり、Ｃチャンネル
が第２のモードがとった際には、Ａ，ＢおよびＤ〜Ｆの
５つのチャンネルは第１のモードをとり、Ｄチャンネル
が第２のモードがとった際には、Ａ〜ＣおよびＥ，Ｆの
５つのチャンネルは第１のモードをとり、Ｅチャンネル
が第２のモードがとった際には、Ａ〜ＤおよびＦの５つ
のチャンネルは第１のモードをとり、Ｆチャンネルが第
２のモードがとった際には、Ａ〜Ｅの５つのチャンネル
は第１のモードをとり、これを循環的に繰り返すように
なっている。In this embodiment, one of the temperature detection systems of the six channels A to F is sequentially selected and set to the second mode, and the other five channels are set to the first mode. It is designed to let you take the mode of. That is, when the A channel is in the second mode, B to
When the five channels F are in the first mode and the B channel is in the second mode, the five channels A and C to F are in the first mode and the C channel is in the second mode. When the mode is set, the five channels A, B and D to F take the first mode, and when the D channel is taken to the second mode, the five channels A to C and E and F are taken. When the two channels are in the first mode and the E channel is in the second mode, the five channels A to D and F are in the first mode and the F channel is in the second mode. In this case, the five channels A to E take the first mode, and this is repeated cyclically.
【００１８】上述した構成をとる本実施例においては、
各チャンネル（各温度検出系統）のフライングキャパシ
タ回路２が第１のモードをとった際に、コンデンサ１２
をチャージし、フライングキャパシタ回路２が第２のモ
ードをとった際に、コンデンサ１２にチャージされた電
荷（電圧）が、Ａ／Ｄ変換回路３に入力される。Ａ／Ｄ
変換回路３は、択一的に適宜サンプリング周期で入力さ
れる各チャンネルの検出電圧を、増幅およびアナログ−
ディジタル変換して、これを演算制御部４に出力する。
これによって、演算制御部４は加熱シリンダの各部の温
度を認知し、各部の温度が予め設定された温度値と一致
するように、加熱シリンダの各部に配設されたバンドヒ
ーターのドライバ回路を制御する。In this embodiment having the above-mentioned configuration,
When the flying capacitor circuit 2 of each channel (each temperature detection system) takes the first mode, the capacitor 12
Are charged and the flying capacitor circuit 2 takes the second mode, the charge (voltage) charged in the capacitor 12 is input to the A / D conversion circuit 3. A / D
The conversion circuit 3 alternatively amplifies and analog-analyzes the detection voltage of each channel, which is input at an appropriate sampling period.
It is digitally converted and output to the arithmetic control unit 4.
Thereby, the arithmetic control unit 4 recognizes the temperature of each part of the heating cylinder and controls the driver circuit of the band heater arranged in each part of the heating cylinder so that the temperature of each part matches the preset temperature value. To do.
【００１９】かように本実施例においては、接地型の熱
電対１を、高耐電圧のＭＯＳＦＥＴを１対用いた第１の
スイッチング手段１１に接続すると共に、該第１のスイ
ッチング手段１１を、コンデンサ１２を介して、高耐電
圧のＭＯＳＦＥＴを１対用いた第２のスイッチング手段
１３に接続し、第２のスイッチング手段１３をオフにし
た状態で、第１のスイッチング手段１１をオンにしてコ
ンデンサ１２をチャージし、このコンデンサ１２にチャ
ージされた電荷を、第１のスイッチング手段１１をオフ
にした状態で、第２のスイッチング手段１３をオンにし
て、後段に出力するように構成したので、接地型の熱電
対１と温度検出系ＩＣ（Ａ／Ｄ変換回路３）とを常に電
気的に絶縁状態に保つことができる。したがって、導電
性の金属よりなる加熱シリンダに不慮の事態により過電
圧が流れても（加熱シリンダにヒーターの動力電源が接
続されても）、温度検出系ＩＣを破壊する虞はなくな
る。また、高耐電圧のＭＯＳＦＥＴを４個とコンデンサ
１個を用いたフライングキャパシタ回路は、ＡＣ２００
Ｖ〜ＡＣ４００Ｖに耐え得る高耐電圧ＩＣに較べて格段
に安価であり、温度測定装置全体のコストを押し上げる
こともない。As described above, in this embodiment, the ground type thermocouple 1 is connected to the first switching means 11 using a pair of high withstand voltage MOSFETs, and the first switching means 11 is connected to the first switching means 11. A high withstand voltage MOSFET is connected via a capacitor 12 to a second switching means 13 using a pair of capacitors, and the first switching means 11 is turned on with the second switching means 13 turned off. 12 is charged, and the electric charge charged in the capacitor 12 is output to the subsequent stage by turning on the second switching means 13 in a state where the first switching means 11 is turned off. The mold thermocouple 1 and the temperature detection system IC (A / D conversion circuit 3) can always be kept electrically insulated. Therefore, even if an overvoltage flows in the heating cylinder made of a conductive metal by accident (even if the power source of the heater is connected to the heating cylinder), the temperature detection system IC will not be destroyed. A flying capacitor circuit using four high withstand voltage MOSFETs and one capacitor is an AC200
It is significantly cheaper than a high withstand voltage IC capable of withstanding V to AC400V, and does not increase the cost of the entire temperature measuring device.
【００２０】以上、本発明を図示した実施例によって説
明したが、本発明の精神を逸脱しない範囲で当業者には
種々の変形が可能であり、例えば前記実施例では熱電対
の検出出力をＡ／Ｄ変換するようにしたが、Ｖ／Ｆ（電
圧−周波数）変換するようにしてもよい。また、前記実
施例では、射出成形機の加熱シリンダの温度検出を例に
とったが、電熱ヒーターで加熱される溶融炉や金型等を
もつダイカストマシン等の成形機にも、本発明は適用可
能である。Although the present invention has been described above with reference to the illustrated embodiment, various modifications can be made by those skilled in the art without departing from the spirit of the present invention. For example, in the above embodiment, the detection output of the thermocouple is set to A Although the A / D conversion is performed, the V / F (voltage-frequency) conversion may be performed. Further, in the above embodiment, the temperature detection of the heating cylinder of the injection molding machine is taken as an example, but the present invention is also applicable to a molding machine such as a die casting machine having a melting furnace or a mold heated by an electric heater. It is possible.
【００２１】[0021]
【発明の効果】以上のように本発明によれば、安価で検
出精度のよい接地型の熱電対を用いた成形機の温度測定
装置において、金属製の加熱シリンダ等の導電体よりな
る温度検出対象に不慮の事態により過電圧が流れても、
温度検出系ＩＣを破壊する虞がなく、かつ、全体を安価
なものに構築できる温度測定装置を提供できる。As described above, according to the present invention, in a temperature measuring device of a molding machine using a ground type thermocouple which is inexpensive and has a high detection accuracy, the temperature detection is made of a conductor such as a heating cylinder made of metal. Even if an overvoltage flows to the target due to an unexpected situation,
It is possible to provide a temperature measuring device which can be constructed inexpensively without fear of destroying the temperature detection system IC.
【図１】本発明の１実施例に係る射出成形機の加熱シリ
ンダの温度検出系の構成を示すブロック図である。FIG. 1 is a block diagram showing a configuration of a temperature detection system of a heating cylinder of an injection molding machine according to an embodiment of the present invention.
【図２】従来技術による射出成形機の加熱シリンダの温
度検出系の構成を示すブロック図である。FIG. 2 is a block diagram showing a configuration of a temperature detection system of a heating cylinder of an injection molding machine according to a conventional technique.
１ 接地型の熱電対 ２ フライングキャパシタ回路 ３ Ａ／Ｄ変換回路 ４ 演算制御部（ＣＰＵ部） １１ 第１のスイッチング手段 １１ａ，１１ｂ 高耐電圧のＭＯＳＦＥＴ １２ コンデンサ １３ 第２のスイッチング手段 １３ａ，１３ｂ 高耐電圧のＭＯＳＦＥＴ DESCRIPTION OF SYMBOLS 1 Ground type thermocouple 2 Flying capacitor circuit 3 A / D conversion circuit 4 Operation control part (CPU part) 11 1st switching means 11a, 11b High withstand voltage MOSFET 12 Capacitor 13 2nd switching means 13a, 13b High Withstand voltage MOSFET
Claims (2)
度検出部位に、接地型の熱電対を配設し、該熱電対の出
力する電圧値を適宜に変換処理して温度測定を行う成形
機の温度測定装置において、 上記熱電対を、高耐電圧のＭＯＳＦＥＴを１対用いた第
１のスイッチング手段に接続すると共に、該第１のスイ
ッチング手段を、コンデンサを介して、高耐電圧のＭＯ
ＳＦＥＴを１対用いた第２のスイッチング手段に接続
し、 上記第２のスイッチング手段をオフにした状態で、上記
第１のスイッチング手段をオンにして上記コンデンサを
チャージし、このコンデンサにチャージされた電荷を、
上記第１のスイッチング手段をオフにした状態で、上記
第２のスイッチング手段をオンにして、後段に出力する
ようにしたことを特徴とする成形機の温度測定装置。1. A molding in which a ground type thermocouple is provided at a temperature detection site of a conductor heated by an electric heater, and a voltage value output from the thermocouple is appropriately converted to measure temperature. In a temperature measuring device for a machine, the thermocouple is connected to a first switching means using a pair of high withstand voltage MOSFETs, and the first switching means is connected to a high withstand voltage MO through a capacitor.
The SFET is connected to a second switching means using a pair, and the first switching means is turned on to charge the capacitor while the second switching means is turned off, and the capacitor is charged. Charge
A temperature measuring device for a molding machine, wherein the second switching means is turned on and output to a subsequent stage in a state where the first switching means is turned off.
ンサと前記第２のスイッチング手段とからなる温度検出
ユニットを複数ユニット設け、各温度検出ユニットから
順次択一選択して出力をとり出すようにしたことを特徴
とする成形機の温度測定装置。2. The temperature detection unit according to claim 1, wherein a plurality of temperature detection units each including the thermocouple, the first switching unit, the capacitor, and the second switching unit are provided, and the temperature detection units are sequentially selected. A temperature measuring device for a molding machine, characterized in that the output is selected and taken out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15473695A JP3547216B2 (en) | 1995-06-21 | 1995-06-21 | Molding machine temperature measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15473695A JP3547216B2 (en) | 1995-06-21 | 1995-06-21 | Molding machine temperature measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH091617A true JPH091617A (en) | 1997-01-07 |
| JP3547216B2 JP3547216B2 (en) | 2004-07-28 |
Family
ID=15590812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15473695A Expired - Fee Related JP3547216B2 (en) | 1995-06-21 | 1995-06-21 | Molding machine temperature measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3547216B2 (en) |
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| EP0990913A1 (en) * | 1998-03-06 | 2000-04-05 | Matsushita Electric Industrial Co., Ltd. | Voltage measuring instrument with flying capacitor |
| US6437538B1 (en) | 1999-10-21 | 2002-08-20 | Honda Giken Kogyo Kabushiki Kaisha | Battery voltage measurement apparatus |
| JP2003014792A (en) * | 2001-04-27 | 2003-01-15 | Denso Corp | Voltage detector for flying capacitor type combined battery |
| WO2004086065A1 (en) * | 2003-03-24 | 2004-10-07 | Sanken Electric Co. Ltd. | Voltage measurement device |
| US6803766B2 (en) | 2001-03-27 | 2004-10-12 | Denso Corporation | Battery pack voltage detection apparatus |
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| EP0990913A4 (en) * | 1998-03-06 | 2006-03-15 | Matsushita Electric Ind Co Ltd | Voltage measuring instrument with flying capacitor |
| US6362627B1 (en) | 1998-03-06 | 2002-03-26 | Matsushita Electric Industrial Co., Ltd. | Voltage measuring instrument with flying capacitor |
| EP0990913A1 (en) * | 1998-03-06 | 2000-04-05 | Matsushita Electric Industrial Co., Ltd. | Voltage measuring instrument with flying capacitor |
| US6437538B1 (en) | 1999-10-21 | 2002-08-20 | Honda Giken Kogyo Kabushiki Kaisha | Battery voltage measurement apparatus |
| US6803766B2 (en) | 2001-03-27 | 2004-10-12 | Denso Corporation | Battery pack voltage detection apparatus |
| JP2003014792A (en) * | 2001-04-27 | 2003-01-15 | Denso Corp | Voltage detector for flying capacitor type combined battery |
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| JP2012510070A (en) * | 2008-11-27 | 2012-04-26 | エルジー・ケム・リミテッド | Battery cell voltage measuring apparatus and measuring method |
| CN102798479A (en) * | 2011-05-25 | 2012-11-28 | 三美电机株式会社 | Amplifying circuit of thermocouple and temperature monitoring system |
| KR20120132322A (en) * | 2011-05-25 | 2012-12-05 | 미쓰미덴기가부시기가이샤 | Amplifier circuit for thermocouple and temperature monitoring system |
| JP2012247217A (en) * | 2011-05-25 | 2012-12-13 | Mitsumi Electric Co Ltd | Amplifier circuit for thermocouple and temperature monitoring system |
| CN105373159A (en) * | 2014-08-06 | 2016-03-02 | Ls产电株式会社 | Apparatus and method for controlling temperature |
| JP2016038385A (en) * | 2014-08-06 | 2016-03-22 | エルエス産電株式会社Lsis Co., Ltd. | Temperature controller and method for controlling temperature |
| US9946274B2 (en) | 2014-08-06 | 2018-04-17 | Lsis Co., Ltd. | Apparatus and method for controlling temperature |
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