JPH03210489A - Temperature controller in magnetic sensor - Google Patents

Temperature controller in magnetic sensor

Info

Publication number
JPH03210489A
JPH03210489A JP2005575A JP557590A JPH03210489A JP H03210489 A JPH03210489 A JP H03210489A JP 2005575 A JP2005575 A JP 2005575A JP 557590 A JP557590 A JP 557590A JP H03210489 A JPH03210489 A JP H03210489A
Authority
JP
Japan
Prior art keywords
magnetic sensor
temperature
temp
thermoelectric element
detection data
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.)
Pending
Application number
JP2005575A
Other languages
Japanese (ja)
Inventor
Akira Miki
晃 三木
Yoshinori Hayashi
好典 林
Nanayuki Takeuchi
七幸 竹内
Akihito Inoki
猪木 昭仁
Masayoshi Yamashita
正芳 山下
Kazuhiro Tsuchiya
土屋 一広
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.)
Yamaha Corp
Original Assignee
Yamaha Corp
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 Yamaha Corp filed Critical Yamaha Corp
Priority to JP2005575A priority Critical patent/JPH03210489A/en
Publication of JPH03210489A publication Critical patent/JPH03210489A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To always obtain stable output by detecting the temp. rise of a magnetic sensor (MR element) and operating a thermoelectric element on the basis of the detection result to cool the MR element. CONSTITUTION:The temp. rise of an MR element 1 is detected by a control means 4 and a temp. control signal M2 for operating a thermoelectric element 2 on the basis of the detection data M1 is outputted to a drive means 6. Therefore, the MR element 1 is cooled by the thermoelectric element 2 and can be also held to temp. becoming a definite standard. By this method, the drift of the detection data M1 of the MR element 1 generated by the heat from the MR element 1 or from the peripheral circuit thereof is suppressed and stable output is always obtained.

Description

【発明の詳細な説明】 「産業上の利用分野」 この発明は、温度変化に関係な(常時安定した出力特性
を示す磁気センサに関する技術である。
DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention is a technology related to a magnetic sensor that is related to temperature changes (and exhibits stable output characteristics at all times).

「従来の技術」 磁気媒体に対して各種情報を記録、読み取る磁気センサ
が多く使用されている。
"Prior Art" Many magnetic sensors are used to record and read various information on magnetic media.

ところで、この種の磁気センサは回路中に組み込まれた
ものであるので、回路の発熱等によりその出力値がドリ
フトする場合がある。
By the way, since this type of magnetic sensor is built into a circuit, its output value may drift due to heat generation in the circuit or the like.

このため、回路中にサーミスタ等の感温素子を設けたり
、また、磁気センサをホイートストンブリ、ジ中に組み
込んだりして、温度変化に伴う出力特性の変化を補正さ
せるようにしている。
For this reason, a temperature sensing element such as a thermistor is provided in the circuit, or a magnetic sensor is incorporated into the Wheatstone bridge to correct changes in output characteristics due to temperature changes.

「発明が解決しようとする課題」 ところで、上記のような磁気センサては、温度の上昇に
伴いそのドリフト値か大きくなる傾向にあり、これによ
って出力値の補正及びその補正に伴う誤差も大きくなる
という欠点を有していた。
"Problem to be Solved by the Invention" By the way, the drift value of the above-mentioned magnetic sensor tends to increase as the temperature rises, which increases the correction of the output value and the error associated with the correction. It had the following drawback.

この発明は、上記の事情に鑑みてなされたものであって
、温度上昇に伴うドリフト値を基にして、磁気センサ自
体を冷却させ、これによって常時安定した出力を得るこ
とがてきる磁気センサにおける温度制御装置の提供を目
的とする。
This invention has been made in view of the above circumstances, and is a magnetic sensor that cools the magnetic sensor itself based on the drift value accompanying temperature rise, thereby making it possible to constantly obtain a stable output. The purpose is to provide a temperature control device.

「課題を解決するための手段」 上記の目的を達成するために、本発明では、冷却部の上
面に磁気センサが設けられて、該磁気センサを冷却させ
る熱電素子と、該磁気センサの温度上昇を検出して熱電
素子を作動させる制御手段とを具備させるようにしてい
る。
"Means for Solving the Problem" In order to achieve the above object, the present invention includes a magnetic sensor provided on the upper surface of the cooling unit, a thermoelectric element that cools the magnetic sensor, and a temperature increase of the magnetic sensor. and a control means for detecting and operating the thermoelectric element.

「作用」 この発明によれば、磁気センサの温度上昇を検出し、こ
の検出結果を基に熱電素子を作動させることにより、該
磁気センサを冷却させ、該磁気センサを基準となる一定
温度に維持することができる。
"Operation" According to the present invention, by detecting the temperature rise of the magnetic sensor and activating the thermoelectric element based on this detection result, the magnetic sensor is cooled and the magnetic sensor is maintained at a constant reference temperature. can do.

「実施例」 本発明の一実施例を図面を参照して説明する。"Example" An embodiment of the present invention will be described with reference to the drawings.

図において符号lで示すものは、磁性層といった成膜部
IAにより構成の一部か形成されるMR素子(磁気セン
サ)、符号2で示すものはベルチェ効果により冷却効果
を有し、冷却側2A上面に前記MR素子1が配置され、
放熱側2Bが外部に開放された熱電素子である。
In the figure, the symbol l indicates an MR element (magnetic sensor) that is partially formed by the film forming part IA, such as a magnetic layer, and the symbol 2 has a cooling effect due to the Beltier effect, and the cooling side 2A The MR element 1 is arranged on the upper surface,
It is a thermoelectric element whose heat radiation side 2B is open to the outside.

そして、前記熱電素子2゛上に配置されたMR素素子跡
らは、該MR素子1が磁気媒体(図示路)から検出した
検出データM、か、信号線3を介して制御手段4に供給
されるようになっている。
The traces of the MR element arranged on the thermoelectric element 2 are then supplied to the control means 4 via the signal line 3 or the detection data M detected by the MR element 1 from the magnetic medium (path shown). It is now possible to do so.

前記制御手段4は、(−)信号線2を介して入力された
検出データM、が、予め設定しておいた基準データから
どれ程ずれているかを平均的に算出し、この算出結果を
前記検出データのドリフト値とする、(ニ)前記ドリフ
ト値からMRR子1の温度を検出し、上昇したMRR子
1の温度を降下させるための温度制御信号M、を信号線
Sを介して駆動手段6に出力するものである。
The control means 4 calculates on average how much the detection data M inputted through the (-) signal line 2 deviates from preset reference data, and uses this calculation result as described above. (iv) detects the temperature of the MRR element 1 from the drift value, and sends a temperature control signal M for lowering the increased temperature of the MRR element 1 to a driving means via a signal line S; 6.

なお、前記制御手段4には、MRR子1に設定させるべ
き基準となる温度、例えば20°Cにおける検出データ
が基準データとして予め記憶され、かつこの基準データ
と信号線3を通じて供給された検出データM、との差か
らドリフト値が算出されるようになっている。また、こ
の制御手段4には、算出されたドリフI・値(検出デー
タと基準データとの差)からMRR子1の上昇温度を検
出させるための対照データが予め記憶され、かつこの対
照データを基にして検出されたMRR子1の上昇温度か
ら、上昇した温度を元の基準となる温度(例えば20°
C)にまで降下させるための温度制御信号M、が駆動手
段6に対して出力されるようになっている。
Note that detection data at a reference temperature to be set in the MRR element 1, for example, 20° C., is stored in advance in the control means 4 as reference data, and this reference data and detection data supplied through the signal line 3 are stored in advance. The drift value is calculated from the difference between M and M. Further, the control means 4 stores in advance control data for detecting the temperature rise of the MRR element 1 from the calculated drift I value (difference between detection data and reference data), and this control data is stored in advance. From the increased temperature of the MRR element 1 detected based on the
A temperature control signal M for lowering the temperature to C) is output to the driving means 6.

前記駆動手段6は、制御手段4から出力された温度制御
信号M2を基にして、熱電素子2を駆動させる駆動信号
M3を、信号線7を介して該熱電素子2に出力するもの
であって、この駆動信号M3により、前記熱電素子2上
のMR素素子跡基準となる温度(例えば20°C)にま
で冷却させるようにしている。
The driving means 6 outputs a driving signal M3 for driving the thermoelectric element 2 to the thermoelectric element 2 via a signal line 7 based on the temperature control signal M2 outputted from the control means 4. , This drive signal M3 is used to cool down the MR element trace on the thermoelectric element 2 to a reference temperature (for example, 20° C.).

以上詳細に説明したように、本実施例に示す磁気センサ
における温度制御装置によれば、制御手段4においてM
RR子1の温度上昇を検出し、この検出データM1を基
にして、熱電素子2を作動させる温度制御信号M2を出
力させるようにしたので、熱電素子2によりMRR子1
を冷却させ、更には、該MR素子lを一定の基準となる
温度に維持することができる。
As explained in detail above, according to the temperature control device for the magnetic sensor shown in this embodiment, the control means 4
The temperature rise of the RR element 1 is detected, and based on this detection data M1, a temperature control signal M2 for operating the thermoelectric element 2 is output.
Furthermore, the MR element 1 can be maintained at a constant reference temperature.

これによって、MRR子1あるいはその周辺の回路が発
熱することで生じる、MR素素子跡検出データM1のド
リフトを抑え、常時安定した出力を得ることが可能とな
る。
As a result, it is possible to suppress the drift of the MR element trace detection data M1 caused by heat generation in the MRR element 1 or its surrounding circuits, and to obtain a stable output at all times.

なお、本実施例では、制御手段4において、MR素素子
跡ら出力された検出データM1を基にして、MRR子1
の温度上昇を検出したか、これに限定されず、温度セン
サ8によりMRR子1の温度を直接的に検出し、この検
出結果に基つき、上昇した温度を元の基準となる温度(
例えば20℃)にまで降下させる温度制御信号M、を駆
動手段6に対して出力しても良い。
In this embodiment, the control means 4 controls the MRR element 1 based on the detection data M1 outputted from the MR element trace.
The temperature of the MRR element 1 is directly detected by the temperature sensor 8, and based on this detection result, the increased temperature is set to the original reference temperature (not limited to this).
For example, a temperature control signal M may be outputted to the drive means 6 to lower the temperature to 20°C.

「発明の効果」 以上詳細に説明したように、本発明によれば、磁気セン
サの温度上昇を検出し、この検出結果を基に熱電素子を
作動させ、該磁気センサを冷却させるようにしたので、
該磁気センサを基準となる一定温度に維持することがで
き、常時安定した出力を得ることができる効果が得られ
る。
"Effects of the Invention" As explained in detail above, according to the present invention, the temperature rise of the magnetic sensor is detected, and based on this detection result, the thermoelectric element is activated to cool the magnetic sensor. ,
The magnetic sensor can be maintained at a constant reference temperature, and a stable output can be obtained at all times.

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

図面は本発明の一実施例を示す概略構成図である。 1・・・・・・MR素子(磁気センサ)、2・・・・・
・熱電素子、2A・・・・・・冷却側(冷却部)、4・
・・・・・制御手段。
The drawing is a schematic configuration diagram showing an embodiment of the present invention. 1...MR element (magnetic sensor), 2...
・Thermoelectric element, 2A...Cooling side (cooling part), 4・
...control means.

Claims (1)

【特許請求の範囲】[Claims] 冷却部の上面に磁気センサが設けられて、該磁気センサ
を冷却させる熱電素子と、該磁気センサの温度上昇を検
出して熱電素子を作動させる制御手段とを有する磁気セ
ンサにおける温度制御装置。
A temperature control device for a magnetic sensor, which includes a magnetic sensor provided on the upper surface of a cooling part, a thermoelectric element that cools the magnetic sensor, and a control means that detects a temperature rise of the magnetic sensor and operates the thermoelectric element.
JP2005575A 1990-01-12 1990-01-12 Temperature controller in magnetic sensor Pending JPH03210489A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005575A JPH03210489A (en) 1990-01-12 1990-01-12 Temperature controller in magnetic sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005575A JPH03210489A (en) 1990-01-12 1990-01-12 Temperature controller in magnetic sensor

Publications (1)

Publication Number Publication Date
JPH03210489A true JPH03210489A (en) 1991-09-13

Family

ID=11615021

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005575A Pending JPH03210489A (en) 1990-01-12 1990-01-12 Temperature controller in magnetic sensor

Country Status (1)

Country Link
JP (1) JPH03210489A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6987650B2 (en) * 2003-05-22 2006-01-17 Headway Technologies, Inc. Device with thermoelectric cooling
JP2009052963A (en) * 2007-08-24 2009-03-12 Denso Corp Magnetic vector distribution measuring probe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6987650B2 (en) * 2003-05-22 2006-01-17 Headway Technologies, Inc. Device with thermoelectric cooling
JP2009052963A (en) * 2007-08-24 2009-03-12 Denso Corp Magnetic vector distribution measuring probe

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