JP2009294157A - Wireless temperature sensor device - Google Patents

Wireless temperature sensor device Download PDF

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JP2009294157A
JP2009294157A JP2008150050A JP2008150050A JP2009294157A JP 2009294157 A JP2009294157 A JP 2009294157A JP 2008150050 A JP2008150050 A JP 2008150050A JP 2008150050 A JP2008150050 A JP 2008150050A JP 2009294157 A JP2009294157 A JP 2009294157A
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sensor device
temperature sensor
temperature
thermocouple
wireless temperature
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Atsushi Kazama
温 風間
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Hakko Electric Machine Works Co Ltd
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Hakko Electric Machine Works Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an economical wireless temperature sensor device capable of stably working without installing a power unit such as a battery in the sensor device as a drive power source thereof. <P>SOLUTION: The wireless temperature sensor device is housed in a protective tube 11 and includes a group of thermocouples 10 having a large number of thermocouples serially connected, including a temperature measuring thermocouple 1a, an IC chip 22 driven by an electromotive force of the group of thermocouples, and an antenna 23 sending temperature information, and uses thermal electromotive force of the group of thermocouples 10 as a drive power source. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、温度センサーにより測定された温度情報を無線により熱源装置に送信する無線式温度センサー装置に関する。   The present invention relates to a wireless temperature sensor device that wirelessly transmits temperature information measured by a temperature sensor to a heat source device.

熱源装置から離れた位置に設置する温度センサーにより、温度を感知し、該測定情報に基づいて、前記熱源装置を制御するシステムにおいては、該熱源装置と温度センサーとの間に配線を敷設する煩わしさなどから、前記温度センサーに送信回路を備え、前記熱源装置に設ける受信回路に、無線により温度情報を送信する無線式温度センサー装置が用いられる。
そして、この無線式温度センサー装置（該装置に内蔵する電子回路）を駆動するためには、当然、電源が必要となることから、従来、該センサー装置には、太陽電池などの各種電池が設けられたり（例えば、特許文献１）、あるいは、熱源装置からの電磁波を直流電流に変換して利用する電源部が設けられたりするなど（特許文献２）、駆動用電源が組み込まれて構成されている。
特開２００３−３２２５６９号公報 特開２００４−３３４６２２号公報 In a system in which the temperature is sensed by a temperature sensor installed at a position away from the heat source device, and the heat source device is controlled based on the measurement information, it is troublesome to install wiring between the heat source device and the temperature sensor. For this reason, a wireless temperature sensor device that includes a transmission circuit in the temperature sensor and transmits temperature information wirelessly to a reception circuit provided in the heat source device is used.
In order to drive the wireless temperature sensor device (an electronic circuit incorporated in the device), naturally, a power source is necessary. Therefore, conventionally, the sensor device is provided with various batteries such as a solar cell. (For example, Patent Document 1), or a power supply unit that converts an electromagnetic wave from a heat source device into a direct current and uses it (Patent Document 2) is configured to include a driving power supply. Yes.
JP 2003-322569 A JP 2004-334622 A

しかし、前記無線式温度センサー装置の駆動用電源として、電池を備えるものでは、該電池の消耗により突然トラブルが発生する懸念や、寿命によるたびたびの交換の必要など、メンテナンスが面倒であるといった問題がある。また、太陽電池では交換の必要はないが、光が無い場所では利用できないという欠点がある。一方、電磁波を利用するものでは、磁力の強さやそれによる到達距離に限界があり、また、ノイズによる誤動作の問題も懸念される。   However, in the case where the power source for driving the wireless temperature sensor device is equipped with a battery, there is a problem that maintenance is troublesome, such as a concern that sudden trouble may occur due to the consumption of the battery, or frequent replacement due to the lifetime. is there. In addition, solar cells do not need to be replaced, but have the disadvantage that they cannot be used in places where there is no light. On the other hand, in the case of using electromagnetic waves, there is a limit to the strength of the magnetic force and the reachable distance, and there is a concern about malfunction due to noise.

そこで本発明は、無線式温度センサー装置の駆動用電源として、該センサー装置に電池などの電源装置を設けない、安定して可動可能で経済的な無線式温度センサー装置を提供することを課題とした。   Accordingly, an object of the present invention is to provide a wireless temperature sensor device that is stably movable and economical as a power source for driving the wireless temperature sensor device without providing a power supply device such as a battery in the sensor device. did.

本発明の無線式温度センサー装置は、温度計測用センサーと、多数の熱電対を直列に接続した熱電対群を備えて構成し、該熱電対群の熱起電力を駆動電源として構成した。   The wireless temperature sensor device of the present invention includes a temperature measurement sensor and a thermocouple group in which a large number of thermocouples are connected in series, and the thermoelectromotive force of the thermocouple group is configured as a drive power source.

また、前記温度測定用センサーは、熱電対であることが好ましく、該温度測定用熱電対は、前記熱電対群に含まれることが一層好ましい。   The temperature measuring sensor is preferably a thermocouple, and the temperature measuring thermocouple is more preferably included in the thermocouple group.

また、前記無線式温度センサー装置には、前記温度計測用センサー、及び、熱電対群に加え、前記熱電対群の起電力により駆動するＩＣチップ、及び、前記温度センサーからの温度情報を送信するアンテナを備えて構成した。   In addition to the temperature measurement sensor and the thermocouple group, the wireless temperature sensor device transmits temperature information from the IC chip driven by the electromotive force of the thermocouple group and the temperature sensor. It was configured with an antenna.

更に、前記温度センサー、及び、熱電対群は、保護管内に収容されていることが好ましい。   Furthermore, it is preferable that the temperature sensor and the thermocouple group are accommodated in a protective tube.

但し、上記、本発明の無線式温度センサー装置では、該センサー装置により制御される熱源装置の運転開始時（常温状態の時）は、熱電対群の熱起電力が零であり、当然、該センサー装置の電子回路を駆動することができないため、運転開始時から該熱電対群の起電力が前記センサー装置の駆動電圧に達する温度になるまでの間、該熱源装置の電源を強制スタートするなどにより、該センサー装置を設置した環境を加熱する手段を備えておく必要がある。   However, in the above-described wireless temperature sensor device of the present invention, when the operation of the heat source device controlled by the sensor device is started (in a normal temperature state), the thermoelectromotive force of the thermocouple group is zero. Since the electronic circuit of the sensor device cannot be driven, the power source of the heat source device is forcibly started until the temperature at which the electromotive force of the thermocouple group reaches the driving voltage of the sensor device from the start of operation. Therefore, it is necessary to provide means for heating the environment where the sensor device is installed.

本発明の無線式温度センサー装置によると、温度に応じた熱起電力を発生する熱電対を、該センサー装置の電子回路を駆動させるのに必要な電圧となる数（多数）だけ直列に接続して、熱電対群として構成することにより、該熱電対群の熱起電力を該無線式温度センサー装置の駆動用電源とすることができることで、他の電源装置を備える必要がない。また、前記、多数の熱電対よりなる熱電対群の内の１本を温度計測用熱電対とすると、駆動電源の起電部と温度検知部が兼用されたものとなる。   According to the wireless temperature sensor device of the present invention, the thermocouples that generate the thermoelectromotive force according to the temperature are connected in series by the number (many) that is the voltage required to drive the electronic circuit of the sensor device. By configuring as a thermocouple group, the thermoelectromotive force of the thermocouple group can be used as a driving power source for the wireless temperature sensor device, so that it is not necessary to provide another power supply device. Further, when one of the thermocouple groups composed of a large number of thermocouples is used as a temperature measurement thermocouple, the electromotive section and the temperature detection section of the drive power supply are used in common.

上記の効果により、前記センサー装置に電池等の駆動用電源を必要としないため、交換等の必要ない経済的な無線式温度センサー装置を提供することができる。
また、電池の消耗の問題、太陽電池での暗い環境での使用の問題、あるいは、磁力による到達距離やノイズによる誤動作といった問題が無いことで、安定して可動可能な無線式温度センサー装置を提供することができる。 Due to the above-described effects, the sensor device does not require a driving power source such as a battery, so that an economical wireless temperature sensor device that does not require replacement or the like can be provided.
In addition, there is no problem of battery consumption, use of solar cells in dark environments, or problems such as the reach by magnetic force or malfunctions due to noise, providing a wireless temperature sensor device that can move stably. can do.

以下、本発明の無線式温度センサー装置の実施の形態につき図面を参考にしながら詳細に説明する。図１は、本実施の形態を模式的に示す構成図を示している。
本形態の無線式温度センサー装置は、比較的高温環境となる加熱炉の炉内部（装置内、加熱雰囲気内）などに設置されるもので（図３参照）、金属筒状の保護管１１内に多数の熱電対１ａ、１ｂ（図では、便宜的に２本のみを描いているが、前記センサー装置の電子回路を駆動するのに必要な本数が用いられる。）を直列に接続した、温度計測部、及び、駆動用電源起電部となる熱電対群１０と、該熱電対群１０で発生した電力により駆動し、計測用熱電対からの起電力をデジタル変換し、送信回路に送るＩＣチップ２２、及び、温度情報信号を熱源装置の受信回路に送信するアンテナ２３よりなる、加熱炉の炉外部（加熱雰囲気外）に配置される送信回路部２により構成される。 Hereinafter, embodiments of a wireless temperature sensor device of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram schematically showing the present embodiment.
The wireless temperature sensor device of the present embodiment is installed in a furnace (inside the apparatus, in a heating atmosphere) of a heating furnace that becomes a relatively high temperature environment (see FIG. 3), and in the protective tube 11 in a metal cylinder shape. A number of thermocouples 1a and 1b (only two are drawn for convenience, but the number necessary for driving the electronic circuit of the sensor device is used) connected in series. A thermocouple group 10 serving as a measurement unit and a driving power source electromotive unit, and an IC that is driven by the power generated in the thermocouple group 10, converts the electromotive force from the measurement thermocouple into a digital signal, and sends it to the transmission circuit The transmitter 22 includes a chip 22 and an antenna 23 that transmits a temperature information signal to a receiving circuit of the heat source device, and is disposed outside the heating furnace (outside the heating atmosphere).

熱電対群１０は、本無線式温度センサー装置を駆動するために必要となる電圧を起電するのに十分な数（多数）の熱電対１ａ、１ｂ、・・・を直列に接続したもので、前記ＩＣチップ２２への駆動電源供給部となり、該ＩＣチップ２２に接続して配線されると共に、該熱電対群１０の中の１本の熱電対を温度計測用の熱電対１ａとして前記ＩＣチップ２２に接続して配線している。
また、前記熱電対群１０は、ステンレスやセラミック、または、チタン等のパイプにより形成された長尺円筒状の保護管１１内に配置され、該保護管１１と熱電対群（素線）１０の隙間に酸化マグネシウム等の無機絶縁粉末を高密度に充填し端部を封止して形成される構造とした。
尚、熱電対の起電力は、例えば、Ｋタイプ熱電対（＋脚を、ニッケルおよびクロムを主とした合金（クロメル）、−脚を、ニッケルを主体とした合金（アルメル）で構成した、工業用として最も多く使用される熱電対）を５本直列に接続し、温度を５００℃とすると、その起電力は０．１Ｖとなるなど計算することができることから、該センサー装置に用いる熱電対は、加熱条件や必要起電力に応じて、適切な種類、及び、数が選択されて用いられれば良い。 The thermocouple group 10 is formed by connecting a sufficient number (many) of thermocouples 1a, 1b,... In series to generate a voltage necessary for driving the wireless temperature sensor device. The IC chip 22 serves as a drive power supply unit, and is connected to the IC chip 22 and wired, and one thermocouple in the thermocouple group 10 is used as the thermocouple 1a for temperature measurement. The wiring is connected to the chip 22.
The thermocouple group 10 is disposed in a long cylindrical protection tube 11 formed of a pipe made of stainless steel, ceramic, or titanium, and the protection tube 11 and the thermocouple group (element wire) 10 The gap was filled with an inorganic insulating powder such as magnesium oxide at a high density and the ends were sealed.
The electromotive force of the thermocouple is, for example, an industrial type K-type thermocouple (+ leg made of an alloy mainly made of nickel and chromium (chromel), and-leg made of an alloy mainly made of nickel (alumel). If the temperature is 500 ° C., the electromotive force can be calculated to be 0.1 V, etc. Therefore, the thermocouple used in the sensor device is Depending on the heating conditions and the required electromotive force, an appropriate type and number may be selected and used.

送信回路部２は、前記保護管１１端部に設けるボックス内部に形成され、炉外部の非加熱部に設置される。（図３参照）
該送信回路２を形成する、ＩＣチップ２２は、前記した熱電対群１０が起電して供給する電圧により駆動し、前記熱電対群１０の中の温度計測用熱電対１ａからの起電力（微小測定信号）を増幅、デジタル変換し、アンテナ２３により、その温度データが熱源装置の受信部に向け送信される。
尚、本例においては、熱電対群１０からＩＣチップ２２への回路途中に安全抵抗２１を設け、ＩＣチップに大電流が流れることを防止している。 The transmission circuit unit 2 is formed inside a box provided at the end of the protective tube 11 and is installed in a non-heating unit outside the furnace. (See Figure 3)
The IC chip 22 that forms the transmission circuit 2 is driven by the voltage generated by the thermocouple group 10 to generate power, and the electromotive force from the thermocouple 1a for temperature measurement in the thermocouple group 10 ( The minute measurement signal) is amplified and converted into digital data, and the temperature data is transmitted to the receiving unit of the heat source device by the antenna 23.
In this example, a safety resistor 21 is provided in the circuit from the thermocouple group 10 to the IC chip 22 to prevent a large current from flowing through the IC chip.

図２は、本例の無線式温度センサーが適合する加熱炉に備えられた熱源装置の受信回路及び温度制御回路を説明するブロック図を示す。
前記した無線式温度センサー装置から送信された信号は、熱源装置のアンテナ３１から受信部を経て復調回路で温度信号に変換される。（以上が無線回路）
該変換された温度信号は、後記するスタート時のみ強制作動させる優先回路を経て、温度制御出力となり電力制御される。（以上、温度制御回路）
但し、前述した通り、本発明の無線式温度センサー装置では、熱源装置の運転開始時（常温状態）は熱電対群１０の熱起電力が零であり、該センサー装置を駆動することができないため、本例のシステムにおいては、加熱炉の運転開始時のみ該加熱炉の熱源装置の電源を強制始動させ、炉内を加熱し温度を上昇させ、前記熱電対群１０の起電力が駆動電圧に達するまでの一定時間、無制御で該熱源装置を作動させることにより、無線式温度センサー装置を駆動させている。詳しくは、この運転開始時の強制スタート回路は、タイマーと連動しており、タイマーが作動している間、優先回路により熱源装置のヒーターを強制作動させるもので、一定時間加熱され、炉内（装置内）の温度が一定温度（熱電対群１０による起電力がセンサー装置の駆動に十分となる温度）に達し、タイマーが切れると、熱電対群１０からの起電力によりＩＣチップ２２が駆動することにより、該無線式温度センサーによる熱源装置の温度制御が可能となる。
尚、前記した運転開始時のタイマー回路が作動している間は、炉内温度が無制御の状態となるため、必要に応じて、機械式サーモスタットや過昇温防止を備えるなどの安全対策をすることが好ましい。 FIG. 2 is a block diagram illustrating a receiving circuit and a temperature control circuit of a heat source device provided in a heating furnace to which the wireless temperature sensor of this example is adapted.
The signal transmitted from the above-described wireless temperature sensor device is converted into a temperature signal by the demodulation circuit from the antenna 31 of the heat source device through the receiving unit. (The above is a radio circuit)
The converted temperature signal becomes a temperature control output through a priority circuit that is forcibly operated only at the start described later, and is subjected to power control. (End of temperature control circuit)
However, as described above, in the wireless temperature sensor device of the present invention, the thermoelectromotive force of the thermocouple group 10 is zero at the start of operation of the heat source device (normal temperature state), and the sensor device cannot be driven. In the system of this example, the power source of the heat source device of the heating furnace is forcibly started only at the start of operation of the heating furnace, the inside of the furnace is heated and the temperature is raised, and the electromotive force of the thermocouple group 10 becomes the drive voltage. The wireless temperature sensor device is driven by operating the heat source device without control for a certain period of time until it reaches. Specifically, the forced start circuit at the start of operation is linked with a timer, and while the timer is operating, the priority circuit forcibly operates the heater of the heat source device, which is heated for a certain period of time, When the temperature in the apparatus reaches a certain temperature (temperature at which the electromotive force generated by the thermocouple group 10 is sufficient for driving the sensor device) and the timer expires, the IC chip 22 is driven by the electromotive force from the thermocouple group 10. As a result, the temperature of the heat source device can be controlled by the wireless temperature sensor.
While the above-described timer circuit at the start of operation is in operation, the furnace temperature is in an uncontrolled state. Therefore, if necessary, safety measures such as providing a mechanical thermostat and preventing excessive temperature rise are taken. It is preferable to do.

図３は、加熱炉の熱源装置の電力制御を説明するための回路図を示している。
加熱炉の内部（装置内）には、ヒーターと本発明の無線式温度センサー装置の感熱部（熱電対群１０の先端部分）が離れた位置に配置されており、該センサー装置からの温度信号が、前記熱源装置の受信回路、温度制御回路を経て、電力制御回路（図２参照）からゲート回路に入り、該ゲート回路から電力制御素子（ＳＳＲ）を制御し、更に、ヒーターを制御している。
ここで、無線式温度センサー装置及び熱源装置の作動の関係をまとめて確認すると、加熱炉の熱源装置の運転を開始すると、タイマーにより一定時間強制的にヒーターに通電され、装置内が無制御に加熱される。そして、ある一定温度に達すると、無線式温度センサー装置の熱電対群１０の熱起電力により該センサー装置（ＩＣチップ）が駆動し、温度計測用熱電対に生じた起電力が該ＩＣチップにより処理され、アンテナを通じ送信され、熱源装置の受信部、復調回路、優先回路を経て温度制御出力となり、電力制御回路からの信号によりゲートからＳＳＲを制御し、ヒーターを制御することで、炉内温度をコントロールすることができる。 FIG. 3 shows a circuit diagram for explaining the power control of the heat source device of the heating furnace.
Inside the heating furnace (inside the apparatus), the heater and the heat sensitive part of the wireless temperature sensor apparatus of the present invention (the tip part of the thermocouple group 10) are arranged at a distance from each other, and the temperature signal from the sensor apparatus However, after passing through the receiving circuit and temperature control circuit of the heat source device, the power control circuit (see FIG. 2) enters the gate circuit, the power control element (SSR) is controlled from the gate circuit, and the heater is further controlled. Yes.
Here, when the operation relationship of the wireless temperature sensor device and the heat source device is confirmed together, when the operation of the heat source device of the heating furnace is started, the heater is forcibly energized for a certain period of time, and the inside of the device becomes uncontrolled. Heated. When the temperature reaches a certain temperature, the sensor device (IC chip) is driven by the thermoelectromotive force of the thermocouple group 10 of the wireless temperature sensor device, and the electromotive force generated in the thermocouple for temperature measurement is driven by the IC chip. It is processed and transmitted through the antenna, and through the receiving part of the heat source device, the demodulating circuit, and the priority circuit, it becomes the temperature control output, the SSR is controlled from the gate by the signal from the power control circuit, and the heater temperature is controlled. Can be controlled.

本発明の実施の形態の一例を示す無線温度センサーの模式図。The schematic diagram of the radio | wireless temperature sensor which shows an example of embodiment of this invention. 前記無線温度センサーに適合する熱源装置の受信回路及び温度制御回路を説明するブロック図。The block diagram explaining the receiving circuit and temperature control circuit of the heat-source apparatus which match the said wireless temperature sensor. 前記熱源装置の電力制御を説明する回路図。The circuit diagram explaining the electric power control of the said heat source apparatus.

符号の説明Explanation of symbols

１０． 熱電対群
１ａ． 温度計測用、駆動電源用兼用熱電対
１ｂ． 駆動電源用熱電対
１１． 保護管
２１． 安全抵抗
２２． ＩＣチップ
２３． アンテナ 10. Thermocouple group 1a. Thermocouple for temperature measurement and drive power supply 1b. 10. Thermocouple for drive power supply Protective tube 21. Safety resistance 22. IC chip 23. antenna

Claims (5)

温度測定用センサーと、多数の熱電対を直列に接続した熱電対群を備えて構成し、該熱電対群の熱起電力を駆動電源とすることを特徴とする無線式温度センサー装置。   A wireless temperature sensor device comprising: a temperature measurement sensor; and a thermocouple group in which a number of thermocouples are connected in series, and the thermoelectromotive force of the thermocouple group is used as a drive power source. 前記温度測定用センサーは、熱電対である請求項１の無線式温度センサー装置。   The wireless temperature sensor device according to claim 1, wherein the temperature measuring sensor is a thermocouple. 前記温度測定用熱電対は、前記熱電対群に含まれる請求項２の無線式温度センサー装置。   The wireless temperature sensor device according to claim 2, wherein the thermocouple for temperature measurement is included in the thermocouple group. 前記温度測定用センサー、及び、熱電対群に加え、前記熱電対群の起電力により駆動するＩＣチップと、前記温度センサーからの温度情報を送信するアンテナを備える請求項１乃至３のいずれかの無線式温度センサー装置。   4. The device according to claim 1, further comprising an IC chip that is driven by an electromotive force of the thermocouple group, and an antenna that transmits temperature information from the temperature sensor, in addition to the temperature measurement sensor and the thermocouple group. Wireless temperature sensor device. 前記温度センサー、及び、熱電対群は、保護管内に収容されてなる請求項１乃至４のいずれかの無線式温度センサー装置。   The wireless temperature sensor device according to claim 1, wherein the temperature sensor and the thermocouple group are accommodated in a protective tube.
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CN109764974A (en) * 2019-01-28 2019-05-17 安徽天康(集团)股份有限公司 A kind of high temperature resistant torch remote temperature measurement thermocouple
CN111006782A (en) * 2019-11-11 2020-04-14 东北大学 Wireless real-time high-mining milling temperature monitoring system and method
CN111609945A (en) * 2020-06-01 2020-09-01 湖南湘钢工程技术有限公司 Wireless low-power-consumption furnace wall temperature measuring device

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