JPH06103341B2 - Unbalanced voltage correction device for Hall sensor - Google Patents
Unbalanced voltage correction device for Hall sensorInfo
- Publication number
- JPH06103341B2 JPH06103341B2 JP63273242A JP27324288A JPH06103341B2 JP H06103341 B2 JPH06103341 B2 JP H06103341B2 JP 63273242 A JP63273242 A JP 63273242A JP 27324288 A JP27324288 A JP 27324288A JP H06103341 B2 JPH06103341 B2 JP H06103341B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- hall sensor
- unbalanced
- resistor
- terminal
- 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.)
- Expired - Fee Related
Links
- 238000010586 diagram Methods 0.000 description 7
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
Landscapes
- Measuring Magnetic Variables (AREA)
- Hall/Mr Elements (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はホールセンサを用いるアナログ、またはデジタ
ル磁束計器等の不平衡電圧補正装置に関する。The present invention relates to an unbalanced voltage correction device such as an analog or digital magnetic flux meter using a Hall sensor.
従来、ホールセンサの持つ第３図のａ〜ｇ曲線で示すよ
うな温度依存性の不平衡電圧に対しては測温抵抗体、ツ
ェナーダイオード等の素子をその極性あるいは温度係数
などの特性に基づき選択し、これを用いた補正回路を構
成することにより補正していた。Conventionally, with respect to the temperature-dependent unbalanced voltage as shown in the a-g curve of FIG. 3 which a hall sensor has, elements such as a resistance temperature detector and a Zener diode are based on the characteristics such as polarity or temperature coefficient. The correction was made by selecting and configuring a correction circuit using this.
第３図に示すようにホールセンサは零磁界に対して温度
に依存する不平衡電圧が存在する。不平衡電圧はホール
センサの素子構造の非対称、素子導電層の不均一性に起
因する。従って不平衡電圧の極性と温度係数は各素子固
有の値を持ち、一般に第３図の曲線ａ〜ｇのいずれかに
より代表される。従来、これを補正するには、（１）曲
線の選択、（２）極性の選択、を行いそれに応じた特性
の測温抵抗体、ツェナーダイオード等を選び補正回路を
作っていた。しかし補正回路は複雑となり実用的に満足
なものはなかった。As shown in FIG. 3, the Hall sensor has a temperature-dependent unbalanced voltage with respect to zero magnetic field. The unbalanced voltage is caused by the asymmetry of the Hall sensor element structure and the nonuniformity of the element conductive layer. Therefore, the polarity and temperature coefficient of the unbalanced voltage have unique values for each element, and are generally represented by any of the curves a to g in FIG. In order to correct this, conventionally, (1) curve selection and (2) polarity selection were performed, and a resistance temperature detector, a Zener diode or the like having characteristics corresponding thereto were selected to form a correction circuit. However, the correction circuit was complicated and none was practically satisfactory.
本発明は、この補正を比較的容易に行なう装置を提供す
るものである。The present invention provides an apparatus that makes this correction relatively easy.
本発明は上記課題を解決するため次の手段を講ずる。 The present invention takes the following means in order to solve the above problems.
すなわち、ホールセンサの不平衡電圧補正装置として、
出力のオフセット調節器付のアンプと、出力端子の一方
を接地し他方を同アンプに入力するホールセンサと、同
ホールセンサの電流端子間に接続されかつ分圧端子を持
つ可変抵抗とを設け、上記分圧端子よりホールセンサの
不平衡電圧を相殺する電圧を取り出し上記アンプに加算
入力するようにした。That is, as an unbalanced voltage correction device for a hall sensor,
An amplifier with an output offset adjuster, a Hall sensor that grounds one of the output terminals and inputs the other to the amplifier, and a variable resistor that is connected between the current terminals of the Hall sensor and has a voltage dividing terminal are provided. A voltage for canceling the unbalanced voltage of the Hall sensor is taken out from the voltage dividing terminal and added to the amplifier.
上記手段により、可変抵抗の分圧端子よりはホールセン
サの電流端子間の素子抵抗の特性で決まる電圧が正また
は負の極性で分圧され取り出せる。一方ホールセンサの
不平衡電圧は上記素子抵抗の温度特性と相関が大きいの
で、可変抵抗を所定の値に設定することによって、不平
衡電圧を相殺する電圧が取り出される。この電圧をホー
ルセンサの出力と加算してアンプに入力することによっ
て不平衡電圧が相殺され、不平衡電圧が補正される。こ
のようにして、ホールセンサ毎に異なる不平衡電圧に対
して、可変抵抗を調節するだけで容易に補正が行われる
ようになる。By the above means, the voltage determined by the characteristic of the element resistance between the current terminals of the Hall sensor is divided by the voltage dividing terminal of the variable resistor with positive or negative polarity and can be taken out. On the other hand, since the unbalanced voltage of the Hall sensor has a large correlation with the temperature characteristic of the element resistance, a voltage that cancels the unbalanced voltage is extracted by setting the variable resistance to a predetermined value. By adding this voltage to the output of the Hall sensor and inputting it to the amplifier, the unbalanced voltage is canceled and the unbalanced voltage is corrected. In this way, the unbalanced voltage that differs for each Hall sensor can be easily corrected simply by adjusting the variable resistance.
本発明の一実施例を第１図、ならびに第３図ないし第６
図により説明する。第１図において、ガリウムヒ素等を
用いたホールセンサ１の電流端子l,m間には定電流源２
がつながれるとともにさらに第１分圧抵抗10、可変抵抗
５、および第２分圧抵抗11が順次つながれれる。さらに
出力端子の一端子ｑは接地、他端子ｐは第１抵抗４を介
してオペアンプ３の負荷入力端子につながれる。またオ
ペアンプ３の負入力端子には可変抵抗５の分圧端子ｔか
ら第２抵抗６を経て入力される。さらに出力のオフセッ
ト調節器として、分圧抵抗８を持つ平衡電源の分圧端か
ら第３抵抗７を経て負入力端子に接続される。また同負
入力端子と出力間は第４抵抗12でつながれる。An embodiment of the present invention is shown in FIG. 1 and FIGS.
It will be described with reference to the drawings. In FIG. 1, a constant current source 2 is provided between current terminals 1 and m of a Hall sensor 1 using gallium arsenide or the like.
The first voltage dividing resistor 10, the variable resistor 5, and the second voltage dividing resistor 11 are sequentially connected as well as being connected. Further, one terminal q of the output terminal is grounded and the other terminal p is connected to the load input terminal of the operational amplifier 3 via the first resistor 4. The negative input terminal of the operational amplifier 3 is input from the voltage dividing terminal t of the variable resistor 5 via the second resistor 6. Further, as an output offset adjuster, it is connected to the negative input terminal from the voltage dividing end of the balanced power source having the voltage dividing resistor 8 through the third resistor 7. A fourth resistor 12 connects the negative input terminal and the output.
以上の構成において、ホールセンサ１の不平衡電圧の特
性が例えば第３図の曲線ａを持ちかつ、電流端子間の素
子抵抗が例えば第４図に示す温度特性を持つとすると、
定電流駆動されたホールセンサ１の電流端子間の制御電
圧Vcは第５図に示すように周囲温度にほぼ比例した曲線
を示す。従って第１分圧抵抗10、第２分圧抵抗11および
可変抵抗５の値を所定の値にし可変抵抗５の分圧端子ｔ
の適当な位置から電圧を取り出すことにより、第６図に
示すように正の曲線Ａから負の曲線Ｂにわたる所定の温
度勾配を持つ補正電圧、すなわち分圧電圧を取り出すこ
とができる。In the above configuration, assuming that the characteristic of the unbalanced voltage of the Hall sensor 1 has the curve a of FIG. 3 and the element resistance between the current terminals has the temperature characteristic of FIG. 4, for example,
Control voltage V c between the constant current driven current terminal Hall sensor 1 shows the approximately proportional to curve to ambient temperature as shown in Figure 5. Therefore, the values of the first voltage dividing resistor 10, the second voltage dividing resistor 11 and the variable resistor 5 are set to predetermined values, and the voltage dividing terminal t of the variable resistor 5 is set.
By taking out the voltage from the appropriate position of, the correction voltage having a predetermined temperature gradient from the positive curve A to the negative curve B, that is, the divided voltage can be taken out as shown in FIG.
電流端子ｌ側を流入端子とすると、曲線Ａ型および曲線
Ｂ型の補正電圧は可変抵抗５の値ｒによってそれぞれ
（１）式および（２）式の条件のときえられる。When the side of the current terminal 1 is the inflow terminal, the correction voltages of the curve A type and the curve B type are obtained by the value r of the variable resistor 5 under the conditions of the expressions (1) and (2), respectively.
ｒ＜ro ……（１） ｒ＞ro ……（２） ここでroは分圧電圧が０となる値。r <r o (1) r> r o (2) where r o is the value at which the divided voltage is zero.
従って可変抵抗５を所定値に設定し、分圧端子ｔよりホ
ールセンサ１の不平衡電圧（第３図曲線ａ）を相殺する
曲線Ｂ型の補正電圧を取り出せる。Therefore, the variable resistor 5 is set to a predetermined value, and a curve B type correction voltage for canceling the unbalanced voltage (curve a in FIG. 3) of the Hall sensor 1 can be taken out from the voltage dividing terminal t.
（イ）ホールセンサ１の不平衡電圧は電流端子間の素子
抵抗の特性と相関関係が強い。(A) The unbalanced voltage of the Hall sensor 1 has a strong correlation with the characteristics of the element resistance between the current terminals.
（ロ）ホールセンサ１の磁界を受けての出力電圧は、素
子抵抗の特性に影響を与えない。(B) The output voltage of the Hall sensor 1 when receiving the magnetic field does not affect the characteristics of the element resistance.
（ハ）補正電圧は電流端子間の電圧を分圧して取り出
す。(C) The correction voltage is obtained by dividing the voltage between the current terminals.
ことのため、可変抵抗５を所定の値に設定することによ
って、温度の広い範囲にわたって不平衡電圧を相殺する
電圧が取り出される。この電圧をホールセンサ１の出力
と加算してオペアンプ３に入力することによって容易に
不平衡電圧補正された出力（反転）がえられる。補正電
圧の加算により生じた出力のオフセット電圧は分圧抵抗
の分圧端を調整して補正される。Therefore, by setting the variable resistor 5 to a predetermined value, a voltage that cancels the unbalanced voltage is taken out over a wide temperature range. By adding this voltage to the output of the Hall sensor 1 and inputting it to the operational amplifier 3, an output (inversion) whose unbalanced voltage has been corrected can be easily obtained. The offset voltage of the output generated by the addition of the correction voltage is corrected by adjusting the voltage dividing end of the voltage dividing resistor.
以上のようにして、第３図に示したホールセンサ１の不
平衡電圧曲線ａ〜ｅ型のものに対して可変抵抗５を調節
するだけで容易に不平衡電圧が補正される。As described above, the unbalanced voltage can be easily corrected only by adjusting the variable resistor 5 for the unbalanced voltage curves a to e of the Hall sensor 1 shown in FIG.
本発明の他の実施例を第２図、第３図および第７図によ
り説明する。なお冗長さをさけるため前記実施例で説明
したところは説明を省略する。Another embodiment of the present invention will be described with reference to FIGS. 2, 3 and 7. In order to avoid redundancy, the description of the parts described in the above embodiment will be omitted.
ホールセンサ１の電流端子間に第１分圧抵抗10、可変抵
抗５′の両固定端子、および第２分圧抵抗11が直列につ
ながれる。また可変抵抗５′の一方の分圧端子ｔは第２
抵抗６を経てオペアンプ３に入力される。さらに可変抵
抗５′の摺動端子と上記分圧端子ｔ間にダイオード４が
つながれる。A first voltage dividing resistor 10, both fixed terminals of a variable resistor 5 ', and a second voltage dividing resistor 11 are connected in series between the current terminals of the hall sensor 1. Also, one of the voltage dividing terminals t of the variable resistor 5'has a second
It is input to the operational amplifier 3 via the resistor 6. Further, the diode 4 is connected between the sliding terminal of the variable resistor 5'and the voltage dividing terminal t.
以上の構成により、ダイオード４の抵抗特性、（温度と
電圧に対する）、第１分圧抵抗10、第２分圧抵抗11、可
変抵抗５′の値を所定の値にし、可変抵抗５分の摺動端
子位置を所定の値におくと第７図に一例を示すような所
定周囲温度より高い温度で曲率の大きい曲線の補正電圧
がえられる。With the above configuration, the resistance characteristics of the diode 4 (with respect to temperature and voltage), the values of the first voltage dividing resistor 10, the second voltage dividing resistor 11, and the variable resistor 5 ′ are set to predetermined values, and the variable resistor 5 minutes are separated. When the moving terminal position is set to a predetermined value, a correction voltage of a curve having a large curvature can be obtained at a temperature higher than a predetermined ambient temperature as shown in FIG.
このようにして第３図の曲線f,gに示すような高い周囲
温度のところで曲線f,gに示すような高い周囲温度のと
ころで曲線の大きいホールセンサ１の不平衡電圧の補正
が容易に行われる。In this way, the unbalanced voltage of the Hall sensor 1 having a large curve can be easily corrected at the high ambient temperature as shown by the curves f and g in FIG. 3 at the high ambient temperature as shown by the curves f and g. Be seen.
以上説明したように本発明によれば次の効果を奏する。 As described above, the present invention has the following effects.
（イ）ホールセンサ自身を補正電圧の形式と取出しの一
素子として使用しているので、温度検出用の新しい素子
を必要としない。(B) Since the Hall sensor itself is used as one element for taking out the form of the correction voltage and taking it out, a new element for temperature detection is not required.
（ロ）ホールセンサの素子抵抗の変動と不平衡電圧の変
動は、比例関係にあるので補正が容易である。(B) Since the fluctuation of the element resistance of the Hall sensor and the fluctuation of the unbalanced voltage are in a proportional relationship, they can be easily corrected.
（ハ）可変抵抗を用いることにより、温度勾配を連続し
て設定できるので細かな調整が各ホールセンサ毎に可能
となる。(C) By using the variable resistance, the temperature gradient can be continuously set, and thus fine adjustment can be performed for each Hall sensor.
第１図は本発明の一実施例の回路図、第２図は他の実施
例の回路図、第３図は上記同一実施例および他の実施例
のホールセンサの不平衡電圧説明図、第４図は同一実施
例の素子抵抗の説明図、第５図は同一実施例の制御電圧
の説明図、第６図は同一実施例の補正電圧の説明図、第
７図は上記他の実施例の補正電圧の説明図である。 １…ホールセンサ、２…定電流源、３…センサのオペア
ンプ、４…第１抵抗、5,5′…可変抵抗、６…第２抵
抗、７…第３抵抗、８…可変抵抗、10…第１分圧抵抗、
11…第２分圧抵抗、12…第４抵抗、13…ダイオード、l,
m…電流端子、ｔ…分圧端子。FIG. 1 is a circuit diagram of one embodiment of the present invention, FIG. 2 is a circuit diagram of another embodiment, and FIG. 3 is an unbalanced voltage explanatory diagram of the Hall sensors of the same embodiment and other embodiments. 4 is an explanatory diagram of element resistance of the same embodiment, FIG. 5 is an explanatory diagram of control voltage of the same embodiment, FIG. 6 is an explanatory diagram of correction voltage of the same embodiment, and FIG. 7 is another embodiment described above. 6 is an explanatory diagram of the correction voltage of FIG. 1 ... Hall sensor, 2 ... Constant current source, 3 ... Sensor operational amplifier, 4 ... First resistance, 5, 5 '... Variable resistance, 6 ... Second resistance, 7 ... Third resistance, 8 ... Variable resistance, 10 ... 1st partial pressure resistance,
11 ... 2nd voltage dividing resistance, 12 ... 4th resistance, 13 ... Diode, l,
m ... current terminal, t ... voltage dividing terminal.
フロントページの続き (72)発明者 太原 雍彦 東京都港区浜松町２丁目４番１号 宇宙開 発事業団内 (72)発明者 石井 嗣剛 東京都狛江市和泉本町１丁目35番１号 東 京航空計器株式会社内 (72)発明者 西野 拓史郎 愛知県名古屋市港区大江町10番地 三菱重 工業株式会社名古屋航空機製作所内 (72)発明者 鶴岡 浩文 愛知県名古屋市港区大江町10番地 三菱重 工業株式会社名古屋航空機製作所内 (56)参考文献 特開 昭51−117078（ＪＰ，Ａ) 特開 昭51−117079（ＪＰ，Ａ) 特開 昭58−19506（ＪＰ，Ａ) 実開 昭51−131177（ＪＰ，Ｕ) 特公 昭40−16818（ＪＰ，Ｂ１) 特公 昭44−3196（ＪＰ，Ｂ１)Continuation of the front page (72) Inventor, Takuhiko Taihara, 2-4-1, Hamamatsucho, Minato-ku, Tokyo Within the space development business group (72) Inventor, Tsuyoshi Go Ishii, 35-1, Izumihoncho, Komae-shi, Tokyo East Within Kyo Aviation Instrument Co., Ltd. (72) Takushiro Nishino 10 Oe-cho, Minato-ku, Nagoya, Aichi Prefecture Mitsubishi Heavy Industries, Ltd.Nagoya Aircraft Works (72) Inventor Hirofumi Tsuruoka 10 Oe-cho, Minato-ku, Nagoya, Aichi Prefecture Mitsubishi Heavy Industries, Ltd., Nagoya Aircraft Manufacturing Co., Ltd. (56) Reference JP-A-51-117078 (JP, A) JP-A-51-117079 (JP, A) JP-A-58-19506 (JP, A) 51-131177 (JP, U) JP-B 40-16818 (JP, B1) JP-B 44-3196 (JP, B1)
Claims (1)
力端子の一方を接地し他方を同アンプに入力するホール
センサと、同ホールセンサの電流端子間に接続されかつ
分圧端子を持つ可変抵抗とを設け、上記分圧端子よりホ
ールセンサの不平衡電圧を相殺する電圧を取り出し上記
アンプに加算入力することを特徴とするホールセンサの
不平衡電圧補正装置。1. A variable amplifier having an output offset adjuster, a Hall sensor for grounding one of the output terminals and inputting the other to the amplifier, and a voltage divider terminal connected between the current terminals of the Hall sensor. An unbalanced voltage correction device for a hall sensor, comprising: a resistor; and a voltage for canceling the unbalanced voltage of the hall sensor is taken out from the voltage dividing terminal and added to the amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63273242A JPH06103341B2 (en) | 1988-10-31 | 1988-10-31 | Unbalanced voltage correction device for Hall sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63273242A JPH06103341B2 (en) | 1988-10-31 | 1988-10-31 | Unbalanced voltage correction device for Hall sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02120680A JPH02120680A (en) | 1990-05-08 |
| JPH06103341B2 true JPH06103341B2 (en) | 1994-12-14 |
Family
ID=17525104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63273242A Expired - Fee Related JPH06103341B2 (en) | 1988-10-31 | 1988-10-31 | Unbalanced voltage correction device for Hall sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06103341B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008008883A (en) | 2006-06-02 | 2008-01-17 | Denso Corp | Magnetometric sensor and sensor |
-
1988
- 1988-10-31 JP JP63273242A patent/JPH06103341B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02120680A (en) | 1990-05-08 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |