JP2001153726A - Noncontact type temperature detecting device and its driving method - Google Patents
Noncontact type temperature detecting device and its driving methodInfo
- Publication number
- JP2001153726A JP2001153726A JP33359899A JP33359899A JP2001153726A JP 2001153726 A JP2001153726 A JP 2001153726A JP 33359899 A JP33359899 A JP 33359899A JP 33359899 A JP33359899 A JP 33359899A JP 2001153726 A JP2001153726 A JP 2001153726A
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- Prior art keywords
- temperature
- sensor element
- sensor
- circuit
- detecting
- 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.)
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- 238000000034 method Methods 0.000 title claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 238000007689 inspection Methods 0.000 claims abstract description 11
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
Description
【０００１】[0001]
【発明が属する技術分野】この発明は、温度センサによ
り非接触で対象物の温度を検知する非接触型温度検出装
置とその駆動方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact type temperature detecting device for detecting a temperature of an object in a non-contact manner by a temperature sensor and a driving method thereof.
【０００２】[0002]
【従来の技術】従来、非接触型の温度センサとしては、
例えばサーモパイルを用いたものがあった。この温度セ
ンサは、赤外線領域の光を受光してその熱エネルギーを
電圧に変換して出力するものである。この温度センサ
は、断線検知のために一定の電流をセンサ素子に流しな
がら温度測定を行っている。2. Description of the Related Art Conventionally, as a non-contact type temperature sensor,
For example, there has been one using a thermopile. The temperature sensor receives light in the infrared region, converts the heat energy into a voltage, and outputs the voltage. This temperature sensor measures the temperature while flowing a constant current through the sensor element for disconnection detection.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の温度センサ
は、断線検知のための電流によりセンサ素子の内部抵抗
による電圧が生じ、温度検知のための出力電圧にオフセ
ットが生じるものであった。しかも、このオフセット量
はセンサ素子毎にばらつきがあるため、正確に温度を検
出するためには、その温度センサ毎にオフセット補正を
行わなければならなかった。In the above-mentioned conventional temperature sensor, a voltage is generated due to an internal resistance of the sensor element due to a current for detecting disconnection, and an offset occurs in an output voltage for detecting temperature. In addition, since the offset amount varies from one sensor element to another, offset correction has to be performed for each temperature sensor in order to accurately detect the temperature.
【０００４】この発明は、上記従来の技術の問題点に鑑
みて成されたもので、簡単な構成で正確な温度検知を可
能にする非接触型温度検出装置とその駆動方法を提供す
ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the related art, and has as its object to provide a non-contact type temperature detecting device which enables accurate temperature detection with a simple configuration and a driving method thereof. Aim.
【０００５】[0005]
【課題を解決するための手段】この発明の非接触型温度
検出装置は、非接触で対象物の温度を検知するサーモパ
イル等のセンサ素子と、このセンサ素子に接続された信
号線と、上記信号線に接続され上記センサ素子の断線を
検知する断線検知回路等の検査用回路と、上記断線検知
回路と上記信号線との接続を開閉するスイッチ素子と、
このスイッチ素子の開閉を制御する制御装置と、上記セ
ンサ素子の出力を基に対象物の温度を検出する温度検出
回路とを備える。そして、上記スイッチ素子が開かれて
上記断線検知回路の断線検知電流が上記センサ素子には
流れない状態で、上記センサ素子の出力電圧により上記
温度検出回路にて温度検知を行うものである。According to the present invention, there is provided a non-contact type temperature detecting device, comprising: a sensor element such as a thermopile for detecting a temperature of an object in a non-contact manner; a signal line connected to the sensor element; An inspection circuit such as a disconnection detection circuit that is connected to a line and detects disconnection of the sensor element, and a switch element that opens and closes a connection between the disconnection detection circuit and the signal line,
The control device includes a control device for controlling the opening and closing of the switch element, and a temperature detection circuit for detecting the temperature of the object based on the output of the sensor element. Then, in a state in which the switch element is opened and the disconnection detection current of the disconnection detection circuit does not flow through the sensor element, the temperature detection is performed by the temperature detection circuit based on the output voltage of the sensor element.
【０００６】また、この発明の非接触型温度検出装置の
駆動方法は、非接触で対象物の温度を検知するセンサ素
子と、このセンサ素子に接続された信号線と、上記信号
線に接続され上記センサ素子の断線を検知する断線検知
回路と、上記断線検知回路と上記信号線との接続を開閉
するスイッチ素子と、このスイッチ素子の開閉を制御す
る制御装置とを備え、上記制御装置により上記スイッチ
素子を所定の周期で開閉し、上記断線検知回路を上記信
号線に接続した場合には断線検知を行い、上記スイッチ
素子を開いて上記断線検知回路の断線検知電流が上記セ
ンサ素子には流れない状態で、上記センサ素子の出力電
圧により温度検知を行うようにしたものである。Further, a driving method of a non-contact type temperature detecting device according to the present invention includes a sensor element for detecting a temperature of an object in a non-contact manner, a signal line connected to the sensor element, and a signal line connected to the signal line. A disconnection detection circuit that detects disconnection of the sensor element, a switch element that opens and closes a connection between the disconnection detection circuit and the signal line, and a control device that controls opening and closing of the switch element. A switch element is opened and closed at a predetermined cycle, and when the disconnection detection circuit is connected to the signal line, disconnection detection is performed. The switch element is opened and a disconnection detection current of the disconnection detection circuit flows through the sensor element. In this state, the temperature is detected based on the output voltage of the sensor element.
【０００７】[0007]
【発明の実施の形態】以下、この発明の一実施の形態に
ついて図面に基づいて説明する。この実施形態の非接触
型温度検出装置は、図１に示すように、非接触で対象物
の温度を検知するサーモパイルからなるセンサ素子を内
蔵した温度センサ１０を有している。この温度センサ１
０内のセンサ素子には、信号線１２が接続され、信号線
１２は温度検出装置本体１４に接続され、アンプ１６を
経て温度検出回路２４に接続されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the non-contact type temperature detecting device of this embodiment has a temperature sensor 10 having a built-in sensor element made of a thermopile for detecting the temperature of an object in a non-contact manner. This temperature sensor 1
A signal line 12 is connected to the sensor element in 0, and the signal line 12 is connected to a temperature detection device main body 14 and is connected to a temperature detection circuit 24 via an amplifier 16.
【０００８】センサ素子に接続された信号線１２には、
センサ素子部の検査を行う検査回路として、断線を検知
する断線検知回路１８が接続され、断線検知回路１８と
信号線１２との間には、その接続を開閉するスイッチ素
子２０が設けられている。スイッチ素子２０は、トラン
ジスタ等により構成されるアナログスイッチである。こ
のスイッチ素子２０には、その開閉を制御する制御装置
であるマイコン２２が接続されている。The signal line 12 connected to the sensor element includes:
As an inspection circuit for inspecting the sensor element portion, a disconnection detection circuit 18 for detecting disconnection is connected, and a switch element 20 for opening and closing the connection is provided between the disconnection detection circuit 18 and the signal line 12. . The switch element 20 is an analog switch including a transistor and the like. The switch element 20 is connected to a microcomputer 22 which is a control device for controlling the opening and closing thereof.
【０００９】この実施形態の非接触型温度検出装置は、
スイッチ素子２０が例えば１秒毎に開閉を繰り返すよう
に、マイコン２２により制御される。そして、スイッチ
素子２０が開かれて断線検知回路１８の断線検知電流が
温度センサ１０内のセンサ素子には流れていない状態
で、センサ素子の出力電圧が信号線１２，アンプ１６等
を介して温度検出回路２４に入力し、その検査対象物の
温度を検出する。また、スイッチ素子２０を閉じて、断
線検知回路１８を信号線１２に接続し、断線検知電流を
センサ素子に流した場合には、温度検出装置１４内の断
線検知回路１８と、その断線検知回路１８に接続され断
線であるか否かを判断する図示しない断線判別回路によ
り、温度センサ１０の断線の有無を判別する。The non-contact type temperature detecting device of this embodiment is
The microcomputer 22 controls the switch element 20 so as to repeat opening and closing every second, for example. When the switch element 20 is opened and the disconnection detection current of the disconnection detection circuit 18 does not flow through the sensor element in the temperature sensor 10, the output voltage of the sensor element is set to the temperature via the signal line 12, the amplifier 16, and the like. The temperature is input to the detection circuit 24 and the temperature of the inspection object is detected. When the switch element 20 is closed and the disconnection detection circuit 18 is connected to the signal line 12 and a disconnection detection current flows through the sensor element, the disconnection detection circuit 18 in the temperature detection device 14 and the disconnection detection circuit The presence / absence of disconnection of the temperature sensor 10 is determined by a disconnection determination circuit (not shown) that is connected to 18 and determines whether or not there is a disconnection.
【００１０】この実施形態の非接触型温度検出装置は、
図２に示すように、例えば、所定の加工が施され、ベル
トコンベア２８上を流れる製品３０の温度を検知して、
加工完了の確認及び製品の通過を検査する装置等に利用
される。このとき、温度検知は、断線検出用の電流が流
れない状態でなされるものであり、従来の技術のような
オフセット補正が必要ではなく、温度の検知精度が高く
なり、個々の温度センサ１０毎の調整も不要である。[0010] The non-contact type temperature detecting device according to this embodiment comprises:
As shown in FIG. 2, for example, predetermined processing is performed, and the temperature of the product 30 flowing on the belt conveyor 28 is detected,
It is used for devices that confirm processing completion and inspect the passage of products. At this time, the temperature detection is performed in a state where the current for disconnection detection does not flow, so that the offset correction unlike the related art is not required, the temperature detection accuracy is increased, and the temperature of each temperature sensor 10 is increased. No adjustment is required.
【００１１】この発明の非接触型温度検出装置は、上記
実施形態に限定されるものではなく、断線検知回路やス
イッチ素子は、適宜の半導体素子等を用いることができ
るものである。また、センサ素子の種類も問わないもの
である。The non-contact type temperature detecting device of the present invention is not limited to the above-described embodiment, and an appropriate semiconductor element or the like can be used for the disconnection detecting circuit and the switch element. Further, the type of the sensor element does not matter.
【００１２】[0012]
【発明の効果】この発明の非接触型温度検出装置とその
駆動方法は、断線検知等の検査用のタイミングと測定用
のタイミングとを分けて温度検出を行うものであるの
で、検査のための誤差成分が測定値に影響することが無
く、正確な温度検知が可能となり、設置作業も容易とな
る。しかも、装置は小型で簡単な構造で形成されるもの
である。According to the non-contact type temperature detecting device and the driving method of the present invention, the temperature is detected separately from the timing for inspection such as disconnection detection and the timing for measurement. The error component does not affect the measured value, accurate temperature detection becomes possible, and the installation work becomes easy. Moreover, the device is formed with a small and simple structure.
【図１】この発明の一実施形態の非接触型温度検出装置
の概略回路図である。FIG. 1 is a schematic circuit diagram of a non-contact type temperature detecting device according to an embodiment of the present invention.
【図２】この実施形態の非接触型温度検出装置の使用例
を示す概略斜視図である。FIG. 2 is a schematic perspective view showing a usage example of the non-contact type temperature detecting device of this embodiment.
１０ 温度センサ １２ 信号線 １４ 温度検出装置本体 １６ アンプ １８ 断線検知回路 ２０ スイッチ素子 ２２ マイコン ２４ 温度検出回路 DESCRIPTION OF SYMBOLS 10 Temperature sensor 12 Signal line 14 Temperature detection device main body 16 Amplifier 18 Disconnection detection circuit 20 Switch element 22 Microcomputer 24 Temperature detection circuit
Claims (3)
素子を有した温度センサ（１０）と、このセンサ素子に
接続され上記センサ素子の検査を行う検査用回路（１
８）と、この検査用回路（１８）と上記センサ素子との
接続を開閉するスイッチ素子（２０）と、このスイッチ
素子の開閉を制御する制御装置（２２）と、上記センサ
素子の出力を基に対象物の温度を検出する温度検出回路
（２４）とを備え、上記スイッチ素子（２０）が開かれ
て上記検査用回路（２４）の電流が上記センサ素子には
流れない状態で上記センサ素子の出力電圧により上記温
度検出回路（２４）にて上記対象物の温度検知を行うこ
とを特徴とする非接触型温度検出装置。A temperature sensor (10) having a sensor element for detecting the temperature of an object in a non-contact manner, and an inspection circuit (1) connected to the sensor element for inspecting the sensor element
8), a switch element (20) for opening and closing the connection between the inspection circuit (18) and the sensor element, a control device (22) for controlling the opening and closing of the switch element, and an output of the sensor element. And a temperature detection circuit (24) for detecting the temperature of the object, wherein the switch element (20) is opened and the current of the inspection circuit (24) does not flow through the sensor element. A non-contact type temperature detecting device, wherein the temperature of the object is detected by the temperature detecting circuit (24) based on the output voltage of the object.
上記検査用回路は断線検知回路（１８）であるとを特徴
とする請求項１記載の非接触型温度検出装置。2. The sensor element is a thermopile,
2. The non-contact type temperature detecting device according to claim 1, wherein said inspection circuit is a disconnection detecting circuit.
素子を有した温度センサ（１０）と、このセンサ素子に
接続され上記センサ素子の検査を行う検査用回路（１
８）と、この検査用回路（１８）と上記センサ素子との
接続を開閉するスイッチ素子（２０）と、このスイッチ
素子（２０）の開閉を制御する制御装置（２２）とを備
え、上記制御装置（２２）により上記スイッチ素子（２
０）を所定の間隔で開閉し、上記検査用回路（１８）を
上記センサ素子に接続した場合には上記センサ素子の所
定の検査を行い、上記スイッチ素子（２０）を開いて上
記検査用回路（１８）の電流が上記センサ素子には流れ
ない状態で、上記センサ素子の出力電圧により上記対象
物の温度検知を行うことを特徴とする非接触型温度検出
装置の駆動方法。3. A temperature sensor (10) having a sensor element for detecting a temperature of an object in a non-contact manner, and an inspection circuit (1) connected to the sensor element for inspecting the sensor element.
8), a switch element (20) for opening and closing the connection between the inspection circuit (18) and the sensor element, and a control device (22) for controlling opening and closing of the switch element (20). The switch element (2) is provided by the device (22).
0) is opened and closed at a predetermined interval, and when the test circuit (18) is connected to the sensor element, a predetermined test of the sensor element is performed, and the switch element (20) is opened to open the test circuit. (18) A method for driving a non-contact temperature detecting device, wherein the temperature of the object is detected by the output voltage of the sensor element in a state where the current does not flow through the sensor element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33359899A JP2001153726A (en) | 1999-11-25 | 1999-11-25 | Noncontact type temperature detecting device and its driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33359899A JP2001153726A (en) | 1999-11-25 | 1999-11-25 | Noncontact type temperature detecting device and its driving method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001153726A true JP2001153726A (en) | 2001-06-08 |
Family
ID=18267843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33359899A Pending JP2001153726A (en) | 1999-11-25 | 1999-11-25 | Noncontact type temperature detecting device and its driving method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001153726A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6582119B2 (en) * | 2000-03-13 | 2003-06-24 | Toyoda Koki Kabushiki Kaisha | Wire breaking detection method for temperature sensor and temperature sensing apparatus for using the method |
| KR101738418B1 (en) | 2017-03-30 | 2017-05-22 | 주식회사 삼흥테크놀리지 | Early safety alerting system for setting zero point with respect to the spindle positions of a dicing machine and the method therefor |
| JPWO2020250466A1 (en) * | 2019-06-12 | 2020-12-17 |
-
1999
- 1999-11-25 JP JP33359899A patent/JP2001153726A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6582119B2 (en) * | 2000-03-13 | 2003-06-24 | Toyoda Koki Kabushiki Kaisha | Wire breaking detection method for temperature sensor and temperature sensing apparatus for using the method |
| KR101738418B1 (en) | 2017-03-30 | 2017-05-22 | 주식회사 삼흥테크놀리지 | Early safety alerting system for setting zero point with respect to the spindle positions of a dicing machine and the method therefor |
| JPWO2020250466A1 (en) * | 2019-06-12 | 2020-12-17 | ||
| WO2020250466A1 (en) * | 2019-06-12 | 2020-12-17 | 株式会社ミクニ | Sensor failure detection device, sensor failure detection method, and program |
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