JP2022103310A - 磁気センサにおける漂遊場拒絶 - Google Patents
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Abstract
【解決手段】本発明は、基準電流でバイアスがかけられた基準場センサ(10)であって、場を受けて基準センサ信号(14)を提供する、基準場センサ(10)と、個々に調整可能な電流でバイアスがかけられ、かつ場を受けて較正済みセンサ信号(24)を提供する較正済み場センサ(20)とを備える、場センサデバイス(99)に関する。較正済み場センサが、共通の場を受けて、基準センサ信号にほぼ等しい較正済みセンサ信号を提供するように、制御回路が、基準電流とは異なる較正済み電流において、較正済み場センサの調整可能な電流バイアスを制御する。場センサデバイスは、較正モードにあるときには均一な較正場に、動作モードにあるときは場勾配である動作場に暴露されるように構成されている。
【選択図】図1
Description
10 基準場センサ
12 基準電流源(供給部)
14 基準センサ信号
20 較正済み場センサ
22 調整可能な電流源(供給部)
24 較正済みセンサ信号
30 制御回路
32 電流制御回路
34 比較器回路
36 変換器回路
80 ワイヤ
99 場センサデバイス
100 場センサデバイスを構築するステップ
110 較正場を提供するステップ
120 基準センサ信号と較正済みセンサ信号とを比較するステップ
130 整合をテストするステップ
140 較正済み場センサバイアス電流を調整するステップ
150 場センサデバイスを顧客に販売し、それを動作させるステップ
160 勾配を計算する任意選択のステップ
170 信号を組み合わせる任意選択のステップ
180 信号を出力するステップ
Claims (15)
- 場センサデバイスであって、
-基準電流でバイアスがかけられた基準場センサであって、場を受けて基準センサ信号を提供する、基準場センサと、
-調整可能な電流でバイアスかかけられ、かつ前記場を受けて較正済みセンサ信号を提供する較正済み場センサと、を備え、
前記較正済み場センサが前記基準電流とは異なる較正済み電流においてバイアスがかけられているとき、前記較正済み場センサが、前記基準センサ信号にほぼ等しい較正済みセンサ信号を提供し、
前記場センサデバイスが、較正モードにあるときには均一な較正場に、動作モードにあるときには場勾配である動作場に暴露されるように構成されている、場センサデバイス。 - 複数の較正済み場センサを備える、請求項1に記載の場センサデバイス。
- 前記場が磁場である、請求項1に記載の場センサデバイス。
- 前記基準場センサと前記1つまたは複数の較正済み場センサとが、共通の基準電圧においてバイアスがかけられている、請求項1に記載の場センサデバイス。
- 前記基準電流を提供するように構成された基準電流源と、前記調整可能な電流を提供するための調整可能な電流源とを備える、請求項1に記載の場センサデバイス。
- 前記基準センサ信号を前記較正済みセンサ信号と比較する比較器を備える、請求項1記載の場センサデバイス。
- 前記基準場センサ、前記較正済み場センサ、もしくは前記基準場センサと前記較正済み場センサとの両方がデジタルセンサであるか、または、前記基準センサ信号、前記較正済みセンサ信号、もしくは前記基準センサ信号と前記較正済みセンサ信号との両方がデジタル信号である、請求項1に記載の場センサデバイス。
- 前記基準センサ信号、前記較正済みセンサ信号、または前記基準センサ信号と前記較正済みセンサ信号との両方を、デジタル信号に変換するための変換器を備える、請求項1に記載の場センサデバイス。
- 前記較正済み場センサが前記基準センサ信号にほぼ等しい較正済みセンサ信号を提供するように、前記基準電流とは異なる較正済み電流において、前記較正済み場センサの前記調整可能な電流バイアスを制御するように構成された制御回路を備える、請求項1に記載の場センサデバイス。
- 場センサデバイスを較正する方法であって、
a)前記場センサデバイスの基準場センサと較正済み場センサとの両方に、均一な較正場を提供することと、
b)前記基準場センサと前記較正済み場センサとによってそれぞれ提供された基準センサ信号と較正済みセンサ信号とを比較することと、
c)前記基準センサ信号と前記較正済みセンサ信号とが実質的に等しくない場合、前記比較することを受けて、調整済み電流で前記較正済み場センサにバイアスをかけることと、
d)前記較正済みセンサ信号が前記基準センサ信号にほぼ等しくなるまで、ステップb)およびc)を繰り返すことと、を含む、方法。 - ステップa)からd)が、前記場センサデバイスを顧客に提供する前に行われ、前記場センサデバイスを前記顧客に提供した後に、前記基準場センサ、前記較正済み場センサ、または前記基準場センサと前記較正済み場センサとの両方に、動作場を提供するステップと、前記基準センサ信号、前記較正済みセンサ信号、前記基準センサ信号と前記較正済みセンサ信号との両方、または前記基準センサ信号と前記較正済みセンサ信号との組み合わせを出力するステップとが、行われる、請求項10に記載の方法。
- 前記基準センサ信号および前記較正済みセンサ信号を、勾配信号を形成するように処理することを含む、請求項10に記載の方法。
- 前記場センサデバイスが、複数の較正済み場センサを備え、前記方法が、前記複数の較正済み場センサからの前記較正済みセンサ信号のうちの2つ以上を、勾配信号を提供するように処理することを含む、請求項10に記載の方法。
- 前記場センサデバイスが、複数の較正済み場センサを備え、前記方法が、各較正済み場センサからの前記較正済みセンサ信号を、組み合わせセンサ信号を提供するように組み合わせることを含む、請求項10に記載の方法。
- 場センサデバイスを動作させる方法であって、
a)請求項1に記載の場センサデバイスを提供することと、
b)前記基準場センサ、前記較正済み場センサ、または前記基準場センサと前記較正済み場センサとの両方に、動作場を提供することと、
c)前記基準センサ信号、前記較正済みセンサ信号、前記基準センサ信号と前記較正済みセンサ信号との両方、または前記基準センサ信号と前記較正済みセンサ信号との組み合わせを出力するここと、を含む、方法。
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US20200408853A1 (en) | 2020-12-31 |
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