ソリューション概要
ここでご紹介するハンズフリー・ジェスチャ認識システムでは、安全のための電流センシングを備えたL99DZ200Gドア・ゾーン・システムIC、SPC58車載用マイクロコントローラ、および足の動きを確実に識別するFlightSense™センサを使用して、車のトランクを開けることができます。
ハンズフリー・ジェスチャ認識ソリューションでは、ドライバがポケットや財布からキーを出さなくてもトランクを開けられるため利便性が高まるほか、物理的にドア・ハンドルに触れる必要がなくなるため衛生状態の向上が促進されます。このような洗練された魅力的な機能を実装することにより、自動車メーカー各社は、より高度で使いやすい操作性を提供することが可能になります。
ハンズフリーのトランク制御システムを搭載した自動車が普及する一方で、多くのユーザがリフト・ゲートの予期せぬ挙動に不満を抱いています。STのスマート・ソリューションでは、あらかじめ設定した足の動きを利用し、シンプルにトランクの開閉を行うことができます。また、電流センスをベースにした安全機能も含まれているため、トランク開閉時の障害物による損傷を防止することができます。
STのハンズフリー電動リフトゲート・ソリューションは、3つのコンポーネントから構成されており、部品数の削減と設計の簡略化に貢献します。バンパ下部に取り付けられたFlightSense™技術採用ToF測距センサにより、トランクの下での足の動きを検出します。足の動きが検出されると、汎用のSPC58 Cライン車載用マイクロコントローラ(SPC58EC80E5)が正しいパターンを確認し、トランクを開閉するためのコマンドを単一の車載用ドア・ゾーン・システムIC(L99DZ200G)に送信します。このICは、自動車のテイルゲートの開閉に必要な2つのモータとトランクをロックする3つ目のモータを同期させて駆動させることができます。L99DZ200Gは、ドライバや同乗者の安全を向上させる2つの外部LEDモジュールを駆動できるだけでなく、過電圧の検出時にHブリッジ・ドライバがすべての外部ローサイドMOSFETを自動的にオンにできるようにするジェネレータ・モードも搭載しています。
ハンズフリー機能は、自動車のロックが解除され、駐車状態である場合にのみ機能するため、セキュリティも確保されています。
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All Features
- 技術
- 電源電圧:12V
- センサ電源電圧:3.3V
- デジタル・ロジック電源電圧:5V
- トランク・モータの同期と駆動
- アプリケーション・ソフトウェア向けFOTA機能
- 性能
- 各モータの最大電流:35A
- 足の動作パターン認識応答時間:1秒
- 認証
- 車載用32bitマイクロコントローラおよびドア・ゾーンIC
- アプリケーション・コードはMISRA C 2012に準拠
- 技術
販売代理店在庫 AEK-MOT-TK200G1
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販売代理店在庫 AEK-SNS-2TOFM1
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販売代理店在庫 AEK-MCU-C4MLIT1
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販売代理店在庫 SPC582B-DIS
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販売代理店在庫 X-NUCLEO-NFC06A1
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販売代理店在庫 AEK-COM-BLEV1
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販売代理店在庫 AEK-CON-SENSOR1
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販売代理店在庫 AEK-AUD-C1D9031
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販売代理店在庫 AEK-LCD-DT028V1
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販売代理店在庫 AEK-LED-21DISM1
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このソリューションは、STのAutoDevKit™開発エコシステム、開発フローおよびツールセットを中心に構築されています。ECUに似た開発全体をサポートする共通の柔軟な統合環境により、迅速な評価および試作を行うための最も簡単かつ最善の手段をエンジニアに提供します。
L99DZ200G評価ボード(AEK-MOT-TK200G1)は、高レベルの安全性と信頼性を確保しながら、自動車のパワー・リフト・ゲートの開閉システムを駆動します。このボードは、3つの異なるモータを駆動できます。2つのモータが自動車のテイルゲートを開閉し、3つ目のモータがトランクをロックします。このボードはまた、2ストリングのLEDなど、2つの異なる高入力容量性負荷も駆動させることができます。1ストリングはトランクが開いているときの内部照明で、もう1ストリングは自動車のナンバー・プレートの照明です。
AEK-MOT-TK200G1評価ボードは、自動車リフト・ゲートの一般的な要件を満たす小型のECUとして使用できます。
このボードには、以下が搭載されています。
- SPIを通じてマルチモータ・ドライバ(L99DZ200G)と通信する1MBのFlashメモリを搭載したSPC582B60E1 ASIL-B車載用マイクロコントローラ
- ボードに接続されるあらゆる負荷を制御するL99DZ200Gドア・ゾーン・システムIC
- ドメイン・コントローラとAEK-MOT-TK200G1との間でリモートでの通信を実現するCANコネクタ
さらに、DCモータ・ポジショニングに対応し、アクチュエーションの安全性を向上させるために、L99DZ200G Hブリッジ出力の電流センシング回路が追加されました。この回路は、ボード上では、モータからのホール・センサのフィードバック専用の2つのコネクタで結合されています。これら2つの機能は、組み合わせて使用することも、交互に使用することもできます。
より高いレベルの安全性を実現するために、サービス・キー・メカニズムも用意されています。このメカニズムは、マイクロコントローラとL99DZ200Gチップ間の継続的な相互通信で構成されます。この安全機能は、マイクロコントローラとL99DZ200G間でのその他すべての通信と同時に使用することができます。
L99DZ200Gを適切に管理するため、設定可能なテンポラル・ウィンドウ(時間条件)内に、サービス・キー・メカニズムの条件を満たす必要があります。サービス・キー条件を満足できない場合は、L99DZ200Gがすべての出力をオフにし、フェイルセーフ・モードに入ります。サービス・キーのテンポラル・ウィンドウは、リアルタイムでも設定できます。
23cm離して配置された2つのTime-of-Flight(ToF)測距センサをベースとして、事前定義されたジェスチャ検出システム(AEK-SNS-2TOFM1)。ToF距離センサが動きを検出すると、CANインタフェース経由でSPC58EC80E5マイコン搭載ボード(AEK-MCU-C4MLIT1)と通信を行います。正しいジェスチャが認識されると、SPC58マイコンがトランクを開閉するためのコマンドをAutoDevKitモータ・ドライバ・ボード(AEK-MOT-TK200G1)上のL99DZ200Gマルチモータ・ドライバに送信します。
Estimated cost
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評価ボード概要
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- カスタムのサブシステムを実現する多機能ソリューション
- 対象物のサイズ、色、および反射率の影響を受けない正確な測距が可能な、信頼性の高いToF距離センサ
- 自動車の安全性を高めるアプリケーション開発に使用可能なMEMSセンサ・コネクタ・ボード
- キーレス・エントリ用のNFCおよびBluetooth®サブシステムを追加可能
- 照明およびオーディオの通信機能を追加するための便利な開発リソース
- モデルベースの設計ソフトウェアによる開発時間短縮
Automotive Analog and Power
製品型番 | 概要 |
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L99DZ200G | Automotive Front Door device with LIN and HS-CAN providing Dual H-bridge driving |
Automotive Microcontrollers
製品型番 | 概要 |
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SPC58EC80E5 | 32-bit Power Architecture MCU for Automotive General Purpose Applications - Chorus family |