JPH01216416A - Temperature detector - Google Patents

Temperature detector

Info

Publication number
JPH01216416A
JPH01216416A JP4079288A JP4079288A JPH01216416A JP H01216416 A JPH01216416 A JP H01216416A JP 4079288 A JP4079288 A JP 4079288A JP 4079288 A JP4079288 A JP 4079288A JP H01216416 A JPH01216416 A JP H01216416A
Authority
JP
Japan
Prior art keywords
temperature
output
resistor
thermistor
fixed resistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4079288A
Other languages
Japanese (ja)
Other versions
JPH07104735B2 (en
Inventor
Takashi Suzuki
隆司 鈴木
Hideto Amamiya
秀人 雨宮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nittan Co Ltd
Original Assignee
Nittan Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nittan Co Ltd filed Critical Nittan Co Ltd
Priority to JP63040792A priority Critical patent/JPH07104735B2/en
Publication of JPH01216416A publication Critical patent/JPH01216416A/en
Publication of JPH07104735B2 publication Critical patent/JPH07104735B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Control Of Temperature (AREA)

Abstract

PURPOSE:To obtain a linear characteristic even in a non-linear heating resistor such as a thermistor, etc., by providing the non-linear heating resistor such as the thermistor, etc., and a change means to connect the resistor to a fixed resistor in series and to change and set the resistance value of the fixed resistor. CONSTITUTION:The output of a temperature range decision part 13 is set at a low level at an ordinary room temperature, and the output is supplied to the base of the transistor 30 of a range change means via a sampling part 19 and a sample and hold part 23. The transistor 30 is turned ON, and a transistor 28 is turned OFF, and the fixed resistor 9 becomes effective, and the fixed resistors 8 and 9 are connected in series to the thermistor 7, then, a linear temperature-output potential characteristic can be obtained in the neighborhood of the ordinary room temperature. When a fire, etc., is generated and the room temperature arrives at 40 deg.C, the output of the range decision part 13 goes to a high level, and it follows that only the fixed resistor 8 is connected in series to the thermistor 7, then, the linear temperature-output potential characteristic can be obtained in the neighborhood of a high temperature. in such a way, it is possible to obtain a linear characteristic in a detecting temperature range of wide range.

Description

【発明の詳細な説明】 [産業上の利用分野J 本発明は、環境の温度上昇をサーミスタ等の非線型感熱
抵抗体により感知するところの温度検出器に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to a temperature detector that senses an increase in the temperature of the environment using a nonlinear heat-sensitive resistor such as a thermistor.

し従来の技術] 火災による温度上昇を感熱抵抗体により検出し、火災の
発生を感知する温度検出器が従来より多く提案されてい
る。近年は、同じ検出器を複数の用途に用いることも提
案されており、その場合に解決せねばならない課題とし
ては、用途毎に異なる情報を必要とするために、従来と
同一の伝送容量において、如何に多くの情報を送り込む
がといううことである。
BACKGROUND ART Many temperature detectors have been proposed that detect the occurrence of a fire by using a heat-sensitive resistor to detect a temperature rise caused by a fire. In recent years, it has been proposed to use the same detector for multiple applications, and in that case, the problem that must be solved is that different information is required for each application, so it is difficult to use the same detector for multiple applications. It's a matter of how much information you send in.

例えば特開昭59−91501号公報には、第3図に示
すような回路構成として、第4図に示すような検出温度
−出力信号特性を得ることのできる温度検出器が開示さ
れている。すなわち、制御回路31からの制御信号によ
り両開閉器32.33を閉じ、基準電圧を下げ、かつ演
算増幅器34の増幅利得を大きくすると、白金測温抵抗
体35から得られる検出温度信号が特性直線Cによって
示される出力特性にしたがって出力電圧に変換される。
For example, Japanese Unexamined Patent Publication No. 59-91501 discloses a temperature detector having a circuit configuration as shown in FIG. 3 and capable of obtaining detected temperature-output signal characteristics as shown in FIG. 4. That is, when both switches 32 and 33 are closed by a control signal from the control circuit 31, the reference voltage is lowered, and the amplification gain of the operational amplifier is increased, the detected temperature signal obtained from the platinum resistance temperature detector 35 follows a characteristic straight line. It is converted into an output voltage according to the output characteristic indicated by C.

これは10〜30℃という狭い温度範囲において十分な
分解能の出力電圧が得られることとなり、空気調和設備
用の検出器として用いることができる。また、制御回路
31からの制御信号により両開閉器32.33を開き、
基準電圧を上げ、かつ演算増幅器34の増幅利得を小さ
くすると、検出温度信号が特性直線りによって示される
出力特性にしたがって出力電圧に変換される。これは4
0〜90℃という広い温度範囲において出力電圧が得ら
れることとなり、火災報知設備用の検出器とじてて用い
ることができる。
This means that an output voltage with sufficient resolution can be obtained in a narrow temperature range of 10 to 30°C, and it can be used as a detector for air conditioning equipment. In addition, both switches 32 and 33 are opened by a control signal from the control circuit 31,
When the reference voltage is increased and the amplification gain of the operational amplifier 34 is decreased, the detected temperature signal is converted into an output voltage according to the output characteristic indicated by the characteristic line. This is 4
Output voltage can be obtained in a wide temperature range of 0 to 90°C, and it can be used as a detector for fire alarm equipment.

上記従来例によれば、この検出器を空気調和設備用ある
いは火災報知設備用として用いようとも、演算増幅器か
ら出力される信号は、同一のアナログ変換器36によっ
てデジタル化して送信することが可能である。すなわち
、このデジタル化された信号を受は取る受信機側におい
ては、制御回路31の状態を参照することにより、同じ
デジタル信号であっても、その信号が表している検出温
度を決定できるわけである。
According to the above conventional example, whether this detector is used for air conditioning equipment or fire alarm equipment, the signal output from the operational amplifier can be digitized and transmitted by the same analog converter 36. be. That is, on the receiver side that receives and receives this digitized signal, by referring to the state of the control circuit 31, the detected temperature represented by the signal can be determined even if the signal is the same digital signal. be.

[発明が解決しようとする課題] しかし、上記従来例は、温度検出素子として白金側温抵
抗体のような高価な素子を用いた検出器であって、安価
なサーミスタ等の素子を用いることができない、何故な
ら、白金測温抵抗体は少なくとも上記検出温度範囲にお
いて線型怒熱抵抗体であって、非線型であるサーミスタ
等を用いると、この回路構成では得られる信号の処理が
複雑となるためである。
[Problems to be Solved by the Invention] However, the above conventional example is a detector that uses an expensive element such as a platinum side temperature resistor as a temperature detection element, and it is not possible to use an inexpensive element such as a thermistor. This is not possible, because the platinum resistance thermometer is a linear heating resistor at least in the above detection temperature range, and if a nonlinear thermistor or the like is used, the processing of the signal obtained with this circuit configuration will be complicated. It is.

また、上記従来例では、制御回路31の管理を受信側で
行なっており、多数の検出器を一括して管理しなければ
ならないような設備においては、受信側の負担が大きな
ものとなり、設備全体の信号処理能力が低下する。
In addition, in the conventional example described above, the control circuit 31 is managed on the receiving side, and in equipment where a large number of detectors must be managed at once, the burden on the receiving side becomes large and the entire equipment is signal processing ability is reduced.

[課題を解決するための手段] 本発明による温度検出器では、サーミスタ等の非線型感
熱抵抗体と固定抵抗よりなる直列回路を電源に接続し、
直列回路の直列結合点の電位変化より温度検出信号を得
る温度検出器において、固定抵抗の抵抗値を変更設定す
る変更手段を有せしめ、また直列結合点の電位を所定値
と比較する比較手段と、該比較手段の出力により上記変
更手段を制御する制御手段とを有せしめ、さらには制御
手段の出力を上記温度検出信号と共に外部へ伝送せしめ
ることにより、上記課題を解決したものである。
[Means for Solving the Problems] In the temperature detector according to the present invention, a series circuit consisting of a nonlinear heat-sensitive resistor such as a thermistor and a fixed resistor is connected to a power source,
A temperature sensor that obtains a temperature detection signal from a potential change at a series connection point in a series circuit is provided with a changing means for changing and setting the resistance value of a fixed resistor, and a comparison means for comparing the potential at the series connection point with a predetermined value. The above problem has been solved by including a control means for controlling the changing means using the output of the comparing means, and further transmitting the output of the control means to the outside together with the temperature detection signal.

[作用] サーミスタの負荷温度特性は、第2図によって示される
。すなわち、サーミスタと負荷となる固定抵抗を直列接
続し、温度を変化させたときの直列結合点の電位を採る
と、第2図のグラフのようになる。ここで各曲線は、負
荷となる固定抵抗の抵抗値Rを変更したときの変化の様
子を示している。このグラフより明らかなように、温度
と出力電位の間の関係が直線となる部位は、負荷抵抗値
の値により変更できる0本発明ではこの点に着目し、目
的とする温度範囲ではその関係が直線となるように負荷
抵抗値を変更し、要すれば基準値も変更するようにして
、サーミスタ等の非線型感熱抵抗体においても線型特性
を得られるようにしている。
[Operation] The load temperature characteristics of the thermistor are shown in FIG. That is, if a thermistor and a fixed resistor serving as a load are connected in series, and the potential at the series connection point is taken as the temperature is varied, the graph in FIG. 2 will be obtained. Here, each curve shows the state of change when the resistance value R of the fixed resistor serving as the load is changed. As is clear from this graph, the portion where the relationship between temperature and output potential is a straight line can be changed by the value of the load resistance.The present invention focuses on this point, and the relationship is By changing the load resistance value so that it is a straight line, and changing the reference value if necessary, it is possible to obtain linear characteristics even in a non-linear heat-sensitive resistor such as a thermistor.

[実施例コ 第1図は、本発明による温度検出器の一実施例における
要部構成図であって、この温度検出器1は受信機(図示
せず)側からのアドレスポーリングに応答して、空気調
和設備用または火災報知設備用の゛温度検出信号を送信
するものである。すなわち、受信機側から順次送られて
くるアドレス信号は伝送回路2を介してアドレス検出回
路3に入力される。アドレス検出回路3は、アドレス設
定器4に設定されているこの検出器1に固有のアドレス
と比較して一致している場合にのみ、コマンド識別回路
5に駆動信号を送る。この駆動信号によって作動したコ
マンド識別回路5は、アドレス信号の後に続けて送られ
てくるコマンド信号の内容を識別し、その内容に応じた
指令信号を発生するわけであるが、ここでは本発明の課
題である温度検出信号を収集する指令信号を発生するも
のとする。この信号を受けて、後述の各構成部への電源
供給を制御するスイッチングトランジスタ6がONする
。ここで各構成部への電源供給を制御するのは、検出器
全体の消費電力量を少なくするのが主な目的であって、
本発明と直接は関係がない。
[Example 1] FIG. 1 is a diagram showing the main part of an embodiment of a temperature detector according to the present invention, and this temperature detector 1 responds to address polling from a receiver (not shown). , for transmitting temperature detection signals for air conditioning equipment or fire alarm equipment. That is, address signals sequentially sent from the receiver side are input to the address detection circuit 3 via the transmission circuit 2. The address detection circuit 3 compares the address with the unique address of this detector 1 set in the address setter 4, and sends a drive signal to the command identification circuit 5 only when the address matches. The command identification circuit 5 activated by this drive signal identifies the content of the command signal sent successively after the address signal and generates a command signal according to the content. Assume that a command signal to collect a temperature detection signal is generated. Upon receiving this signal, a switching transistor 6, which controls power supply to each component to be described later, is turned on. The main purpose of controlling the power supply to each component is to reduce the power consumption of the entire detector.
It is not directly related to the present invention.

さて、電源供給が行われると、サーミスタ7と2個の固
定抵抗8.9が直列接続されてなる温度検出部10が機
能し、直列結合点11に検出温度に応じた電位が生じる
。この検出温度に応じた電位信号は、温度信号増幅部1
2ならびに温度レンジ判定部13に供給される。温度信
号増幅部12は演算増幅器14からなり、電位信号を所
定の割合で増幅し、その出力はアナログ・デジタル変換
器15のアナログ入力端子に入力される。温度レンジ判
定部13は、温度検出部10からの電位信号が所定レン
ジを越えたか否かを判定するものであって、2個の固定
抵抗16.17からなる直列回路の直列結合点の電位と
入力電位を比較して出力する比較器18からなるもので
ある。この実施例においては、温度検出部10からの入
力電位が約40℃以上の温度に相当する電位を呈したと
きに、出力がハイレベルとなるよう設定されている。
Now, when power is supplied, the temperature detecting section 10 formed by the thermistor 7 and two fixed resistors 8.9 connected in series functions, and a potential corresponding to the detected temperature is generated at the series connection point 11. The potential signal corresponding to this detected temperature is generated by the temperature signal amplifying section 1.
2 and the temperature range determining section 13. The temperature signal amplifying section 12 includes an operational amplifier 14, which amplifies the potential signal at a predetermined rate, and its output is input to an analog input terminal of an analog-to-digital converter 15. The temperature range determining unit 13 determines whether the potential signal from the temperature detecting unit 10 exceeds a predetermined range, and is configured to determine whether the potential signal from the temperature detecting unit 10 exceeds a predetermined range, and determines whether or not the potential signal from the temperature detecting unit 10 exceeds a predetermined range. It consists of a comparator 18 that compares and outputs input potentials. In this embodiment, the output is set to be high level when the input potential from the temperature detection section 10 exhibits a potential corresponding to a temperature of approximately 40° C. or higher.

温度レンジ判定部13の出力は、サンプリング部19に
供給される。このサンプリング部1つは、温度検出動作
の初期における温度レンジ判定部13の出力のみを判定
結果として採用し、後述するレンジ変更手段がチャツタ
リングするのを防止するために設けられたものであって
、コンデンサ20と抵抗21からなる時定数回路と、N
AND回路22から構成されている。
The output of the temperature range determining section 13 is supplied to the sampling section 19. This one sampling section is provided in order to adopt only the output of the temperature range determining section 13 at the initial stage of the temperature detection operation as a determination result, and to prevent the range changing means described later from chattering. A time constant circuit consisting of a capacitor 20 and a resistor 21, and N
It is composed of an AND circuit 22.

サンプリング部19の出力は、サンプルホールド部23
を介してレンジ変更手段に供給される。
The output of the sampling section 19 is sent to the sample hold section 23.
is supplied to the range changing means via.

このサンプルホールド部23は主にコンデンサ24と抵
抗25からなる時定数回路と、2個のインバータ26.
27から構成されており、サンプリング部19から得ら
れる判定結果をこの温度検出の一連の動作が完了するま
で保持するものである。
This sample hold section 23 mainly includes a time constant circuit consisting of a capacitor 24 and a resistor 25, and two inverters 26.
27, and holds the determination result obtained from the sampling section 19 until the series of operations for temperature detection is completed.

レンジ変更手段は、上記温度検出部10の固定抵抗9と
並列にコレクタ・エミッタ電路が接続された第1のトラ
ンジスタ28と、同様に上記温度信号増幅部12の出力
電圧を調整するための固定抵抗29と並列にコレクタ・
エミッタ電路が接続された第2のトランジスタ30とか
らなり、第1のトランジスタ28のベースは第2のトラ
ンジスタ30のコレクタ側に接続されると共に、第2の
トランジスタ30のベースは上記サンプルホールド部2
3の出力側に接続されている。
The range changing means includes a first transistor 28 whose collector-emitter circuit is connected in parallel with the fixed resistor 9 of the temperature detecting section 10, and a fixed resistor for adjusting the output voltage of the temperature signal amplifying section 12. Collector in parallel with 29
The base of the first transistor 28 is connected to the collector side of the second transistor 30, and the base of the second transistor 30 is connected to the sample hold section 2.
It is connected to the output side of 3.

以上が本発明による温度検出器の一実施例における構成
であるが、上記サンプリング部19.サンプルホールド
部23等は既存の同等な回路によって置き換え得ること
は勿論である。
The above is the configuration of one embodiment of the temperature detector according to the present invention.The sampling section 19. Of course, the sample hold section 23 and the like can be replaced with existing equivalent circuits.

さて上記温度検出器1における動作は、以下のようにな
る。
Now, the operation of the temperature detector 1 is as follows.

すなわち、通常の室内温度であれば温度レンジ判定部1
3の出力はローレベルを呈し、その出力はサンプリング
部19ならびにサンプルホールド部23を介してレンジ
変更手段の第2のトランジスタ30のベースに供給され
る。これにより第2のトランジスタ30はONとなるの
で、第1のトランジスタ28がOFFされる。すると第
1のトランジスタ28と並列に接続されている固定抵抗
9が有効となるので、2個の固定抵抗8.9がす・−ミ
スタ7と直列に接続されることとなり、その負荷温度特
性は第2図の曲線Aのようになる0曲線Aからも明らか
なように、この状態においては通常室内温度付近におい
て直線的な温度−出力電位特性が得られる。この出力電
位が温度信号増幅部12に入力されて所定の割合で増幅
されたのちアナログ・デジタル変換器15においてデジ
タル信号に変換され、伝送回路2を介して受信機側へ送
られる。この際、レンジ変更手段を通常温度範囲の低レ
ンジに設定する温度レンジ判定部13からのローレベル
の出力も、伝送回路2を介して上記デジタル信号と共に
受信機側へ送られるため、受信機側ではこの温度レンジ
判定部の出力状況を参照することにより、現在送られて
きているデジタル信号から真の検出温度を決定すること
ができる。
In other words, if the room temperature is normal, the temperature range determination unit 1
The output of No. 3 exhibits a low level, and is supplied to the base of the second transistor 30 of the range changing means via the sampling section 19 and sample hold section 23. As a result, the second transistor 30 is turned on, so the first transistor 28 is turned off. Then, the fixed resistor 9 connected in parallel with the first transistor 28 becomes effective, so the two fixed resistors 8.9 are connected in series with the resistor 7, and the load temperature characteristics are as follows. As is clear from the 0 curve A shown in FIG. 2, in this state, a linear temperature-output potential characteristic is usually obtained near the room temperature. This output potential is input to the temperature signal amplification section 12 and amplified at a predetermined rate, and then converted into a digital signal by the analog-to-digital converter 15 and sent to the receiver side via the transmission circuit 2. At this time, the low level output from the temperature range determining section 13, which sets the range changing means to the low range of the normal temperature range, is also sent to the receiver side together with the digital signal via the transmission circuit 2. By referring to the output status of this temperature range determining section, the true detected temperature can be determined from the currently sent digital signal.

次に、火災等が発生し、室内温度が40℃に到達すると
、温度レンジ判定部13の出力はハイレベルを呈し、そ
の出力はサンプリング部19ならびにサンプルホールド
部23を介してレンジ変更手段の第2のトランジスタ3
0のベースに供給される。これにより第2のトランジス
タ30はOFFとなるので、第1のトランジスタ28が
ONされる。すると第1のトランジスタ28と並列に接
続されている固定抵抗9の両端が短絡されて無効となる
ので、1個の固定抵抗8のみがサーミスタ7と直列に接
続されることとなり、その負荷温度特性は第2図の曲線
Bのようになる0曲線Bからも明らかなように、この状
態においては通常室内温度よりも高い温度付近において
直線的な温度−出力電位特性が得られる。この出力電位
が温度信号増幅部12に入力されて所定の割合で増幅さ
れたのちアナログ・デジタル変換器15においてデジタ
ル信号に変換され、伝送回路2を介して受信機側へ送ら
れる。そしてレンジ変更手段を異常温度範囲の高レンジ
に設定する温度レンジ判定部13からのハイレベルの出
力も、伝送回路2を介して上記デジタル信号と共に受信
機側へ送られ、受信機側ではこの温度レンジ判定部の出
力状況を参照することにより、現在送られてきているデ
ジタル信号から真の検出温度を決定する。
Next, when a fire or the like occurs and the indoor temperature reaches 40°C, the output of the temperature range determining section 13 becomes high level, and the output is passed through the sampling section 19 and the sample hold section 23 to the range changing means. 2 transistor 3
0 base. As a result, the second transistor 30 is turned off, and the first transistor 28 is turned on. Then, both ends of the fixed resistor 9 connected in parallel with the first transistor 28 are short-circuited and become invalid, so only one fixed resistor 8 is connected in series with the thermistor 7, and its load temperature characteristics As is clear from the 0 curve B shown in FIG. 2, in this state, a linear temperature-output potential characteristic is obtained near a temperature higher than the normal room temperature. This output potential is input to the temperature signal amplification section 12 and amplified at a predetermined rate, and then converted into a digital signal by the analog-to-digital converter 15 and sent to the receiver side via the transmission circuit 2. A high-level output from the temperature range determining section 13 that sets the range changing means to a high range within the abnormal temperature range is also sent to the receiver side together with the digital signal via the transmission circuit 2, and the receiver side receives the temperature By referring to the output status of the range determining section, the true detected temperature is determined from the currently sent digital signal.

[発明の効果] 以上のように本発明による温度検出器では、サーミスタ
等の非線型感熱抵抗体と固定抵抗よりなる直列回路を電
源に接続し、直列回路の直列結合点の電位変化より温度
検出信号を得る温度検出器において、固定抵抗の抵抗値
を変更設定する変更手段を設けたので、広範囲の検出温
度範囲において直線的な特性を得ることができ、安価な
サーミスタ等の素子を用いることができる。また直列結
合点の電位を所定値と比較する比較手段と、該比較手段
の出力により上記変更手段を制御する制御手段とを設け
たので、検出器自身で温度レンジ制御の管理をさせるこ
とができ、受信側に大きな負担をかけること無く、多数
の検出器を一括して管理することができる。さらには制
御手段の出力を温度検出信号と共に外部へ伝送するので
、受信側ではこの制御手段の出力を参照することにより
、容易に真の検出温度を決定することができる。
[Effects of the Invention] As described above, in the temperature sensor according to the present invention, a series circuit consisting of a nonlinear heat-sensitive resistor such as a thermistor and a fixed resistor is connected to a power source, and temperature is detected from the potential change at the series connection point of the series circuit. In the temperature sensor that obtains the signal, a changing means is provided to change and set the resistance value of the fixed resistor, so linear characteristics can be obtained over a wide detection temperature range, and inexpensive elements such as thermistors can be used. can. Furthermore, since a comparison means for comparing the potential of the series connection point with a predetermined value and a control means for controlling the above-mentioned changing means based on the output of the comparison means are provided, the temperature range control can be managed by the detector itself. , it is possible to manage a large number of detectors at once without placing a large burden on the receiving side. Furthermore, since the output of the control means is transmitted to the outside together with the temperature detection signal, the receiving side can easily determine the true detected temperature by referring to the output of the control means.

なお、温度レンジ判定部の出力反転温度を60℃という
ような温度とすることにより、第1図において端子Pに
て示すように、制御手段の出力を直接、防排煙設備の制
御信号として利用することも可能である。
Furthermore, by setting the output reversal temperature of the temperature range determination section to a temperature such as 60°C, the output of the control means can be directly used as a control signal for the smoke prevention equipment, as shown by terminal P in Fig. 1. It is also possible to do so.

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

第1図は本発明による温度検出器の一実施例における要
部構成図、第2図は第1図の検出器に用いるサーミスタ
の特性曲線図、第3図は従来の温度検出器における構成
図、第4図は第3図の検出器の特性曲線図である。 7・・・サーミスタ、8.9・・・固定抵抗、9.28
・・・変更手段を構成する抵抗とトランジスタ、13・
・・比較手段としての温度レンジ判定部、19.23・
・・制御手段としてのサンプリング部およびサンプルホ
ールド部、2・・・伝送回路
Fig. 1 is a block diagram of essential parts of an embodiment of a temperature detector according to the present invention, Fig. 2 is a characteristic curve diagram of a thermistor used in the detector of Fig. 1, and Fig. 3 is a block diagram of a conventional temperature detector. , FIG. 4 is a characteristic curve diagram of the detector of FIG. 3. 7... Thermistor, 8.9... Fixed resistance, 9.28
...Resistor and transistor constituting the changing means, 13.
・Temperature range determination unit as comparison means, 19.23・
...Sampling section and sample hold section as control means, 2...Transmission circuit

Claims (3)

【特許請求の範囲】[Claims] (1)サーミスタ等の非線型感熱抵抗体と固定抵抗より
なる直列回路を電源に接続し、該直列回路の直列結合点
の電位変化より温度検出信号を得る温度検出器において
、上記固定抵抗の抵抗値を変更設定する変更手段を有す
ることを特徴とする温度検出器。
(1) In a temperature detector in which a series circuit consisting of a nonlinear heat-sensitive resistor such as a thermistor and a fixed resistor is connected to a power source and a temperature detection signal is obtained from a potential change at a series connection point of the series circuit, the resistance of the fixed resistor is A temperature detector characterized by having a changing means for changing and setting a value.
(2)サーミスタ等の非線型感熱抵抗体と固定抵抗より
なる直列回路を電源に接続し、該直列回路の直列結合点
の電位変化より温度検出信号を得る温度検出器において
、上記固定抵抗の抵抗値を変更設定する変更手段と、上
記直列結合点の電位を所定値と比較する比較手段と、該
比較手段の出力により上記変更手段を制御する制御手段
とを有することを特徴とする温度検出器。
(2) In a temperature detector in which a series circuit consisting of a nonlinear heat-sensitive resistor such as a thermistor and a fixed resistor is connected to a power source, and a temperature detection signal is obtained from a potential change at a series connection point of the series circuit, the resistance of the fixed resistor is A temperature sensor comprising a changing means for changing and setting a value, a comparing means for comparing the potential of the series connection point with a predetermined value, and a control means for controlling the changing means by the output of the comparing means. .
(3)サーミスタ等の非線型感熱抵抗体と固定抵抗より
なる直列回路を電源に接続し、該直列回路の直列結合点
の電位変化より温度検出信号を得る温度検出器において
、上記固定抵抗の抵抗値を変更設定する変更手段と、上
記直列結合点の電位を所定値と比較する比較手段と、該
比較手段の出力により上記変更手段を制御する制御手段
とを有し、該制御手段の出力を上記温度検出信号と共に
外部へ伝送することを特徴とする温度検出器。
(3) In a temperature detector in which a series circuit consisting of a nonlinear heat-sensitive resistor such as a thermistor and a fixed resistor is connected to a power source, and a temperature detection signal is obtained from a potential change at a series connection point of the series circuit, the resistance of the fixed resistor is It has a changing means for changing and setting a value, a comparing means for comparing the potential of the series connection point with a predetermined value, and a control means for controlling the changing means by the output of the comparing means, and the output of the controlling means is A temperature detector characterized in that the temperature detection signal is transmitted to the outside together with the temperature detection signal.
JP63040792A 1988-02-25 1988-02-25 Temperature detector Expired - Fee Related JPH07104735B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63040792A JPH07104735B2 (en) 1988-02-25 1988-02-25 Temperature detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63040792A JPH07104735B2 (en) 1988-02-25 1988-02-25 Temperature detector

Publications (2)

Publication Number Publication Date
JPH01216416A true JPH01216416A (en) 1989-08-30
JPH07104735B2 JPH07104735B2 (en) 1995-11-13

Family

ID=12590473

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63040792A Expired - Fee Related JPH07104735B2 (en) 1988-02-25 1988-02-25 Temperature detector

Country Status (1)

Country Link
JP (1) JPH07104735B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6481982A (en) * 1987-09-25 1989-03-28 Ricoh Kk Fixation temperature controller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6481982A (en) * 1987-09-25 1989-03-28 Ricoh Kk Fixation temperature controller

Also Published As

Publication number Publication date
JPH07104735B2 (en) 1995-11-13

Similar Documents

Publication Publication Date Title
JPS5991501A (en) Temperature detector
AU651481B2 (en) Threshold determination apparatus and method
GB2423400A (en) Detector with variable sensitivity in different modes of operation
JP3231887B2 (en) Heat detector
JPH01216416A (en) Temperature detector
EP0539150B1 (en) Infrared detector
JP3287906B2 (en) Photoelectric smoke detector
JP3210875B2 (en) Compensated fire detector
JPH07234979A (en) Heat sensor
JP3458735B2 (en) Infrared detector
JP2569878B2 (en) Temperature sensor circuit disconnection detection method
KR960007980B1 (en) Apparatus and method for sensing human body position of air conditioner
JPH0560640B2 (en)
JP3070308B2 (en) Heat detector
JPH05225460A (en) Thermosensor
JPH06308067A (en) Humidity detector
JPS5953496B2 (en) infrared radiation thermometer
JPH09115064A (en) Signal processing circuit for hot-wire sensor
JPH0611500Y2 (en) Sensor open check circuit
JP3151494B2 (en) Heat detector with operation test function
JP2600739B2 (en) Heat detector
JP3100457B2 (en) Analog / digital conversion circuit for multiple inputs
JP3116128B2 (en) Fire detector
KR200220340Y1 (en) Motor controller with temperature compensation circuit
JP2001264164A (en) Infrared detector

Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees