JP2004170518A - Hybrid vehicle - Google Patents

Hybrid vehicle Download PDF

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Publication number
JP2004170518A
JP2004170518A JP2002333871A JP2002333871A JP2004170518A JP 2004170518 A JP2004170518 A JP 2004170518A JP 2002333871 A JP2002333871 A JP 2002333871A JP 2002333871 A JP2002333871 A JP 2002333871A JP 2004170518 A JP2004170518 A JP 2004170518A
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JP
Japan
Prior art keywords
power source
recognition
hybrid vehicle
voice recognition
combustion engine
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JP2002333871A
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Japanese (ja)
Inventor
Kenji Komori
賢二 小森
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Priority to JP2002333871A priority Critical patent/JP2004170518A/en
Publication of JP2004170518A publication Critical patent/JP2004170518A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hybrid vehicle capable of improving the recognition rate of a speech recognizing device. <P>SOLUTION: The hybrid vehicle equipped with an internal combustion engine 5 and an electric motor 6 as its power source is equipped with the speech recognizing device 2, a speech recognition start detection means 3 of detecting the start point of speech recognition by the speech recognition device 2, and a power source switching device 4 which switches the power source from the internal combustion engine 5 to the electric motor 6 if the power source is the internal combustion engine 5 when the speech recognition start detection means 3 detects the start point of the speech recognition. Consequently, dark noise becomes small in the speech recognition, so the recognition efficiency of the speech recognition device 2 can greatly be improved. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、音声認識装置を備えたハイブリッド車両に係り、特に、音声認識処理時に動力源の暗騒音を低減する技術に関する。
【０００２】
【従来の技術】
近年、動力源として内燃機関、及び電動機の双方を有し、走行状態に応じて、適宜動力源を選択して走行するハイブリッド車両が普及している。また、車両に搭載されるナビゲーション装置等では、音声認識装置を具備し、乗員による音声入力で、目的地データ等の所望の入力操作を行うことができるものが採用されている。
【０００３】
ハイブリッド車両は、動力源が内燃機関とされているときと、電動機とされているときとで、発生する暗騒音が異なるので、認識率が大きく相違してしまう。即ち、動力源が内燃機関とされているときには、大きな暗騒音が発生するので、認識率が低下してしまい、良好な音声入力ができなくなってしまうという問題が発生する。
【０００４】
このような問題を解決するものとして、例えば、特開２０００−６６６９７号公報（以下、特許文献１という）に記載されたものが知られている。
【０００５】
該特許文献１では、現在用いられている動力源に応じて、音声認識に用いるデータベースを変更し、周囲の騒音に適合した処理を行うことにより、音声入力の認識率を向上させる内容について記載されている。
【０００６】
【特許文献１】
特開２０００−６６６９７号公報
【０００７】
【発明が解決しようとする課題】
内燃機関を搭載している車両にて音声認識を行う場合には、内燃機関の暗騒音が大きく、認識率が低下する場合がある。また、内燃機関を駆動源としている場合には、車両停車時よりも走行時の方が暗騒音が大きくなるので、このような場合においても、認識率が低下してしまうという欠点がある。
【０００８】
上記した特許文献１では、暗騒音のレベルに応じて音声認識装置が用いるデータベースを変化させるという構成になっているため、暗騒音そのものを低下させることはできず、暗騒音が大きい状況下では、音声認識処理の認識率が低下してしまうという問題があった。
【０００９】
本発明はこのような従来の課題を解決するためになされたものであり、その目的とするところは、音声認識装置の認識率を向上させることのできるハイブリッド車両を提供することにある。
【００１０】
【課題を解決するための手段】
上記目的を達成するため、本発明は、走行時に発生する暗騒音が異なる複数の動力源を備えたハイブリッド車両において、音声認識手段と、前記音声認識手段にて音声認識の開始時点を検知する認識開始検出手段と、前記認識開始検出手段にて音声認識の開始時点が検出された際に、前記複数の動力源のうちの、現在用いている動力源よりも暗騒音が小さい動力源に切り換える動力源切り換え手段と、を備えたことを特徴とする。
【００１１】
【発明の効果】
本発明に係るハイブリッド車両では、音声認識手段による音声認識処理が開始された際には、このとき使用されている動力源が、大きい暗騒音を発生するものであるかどうかが判断され、大きい暗騒音が発生する動力源である場合には、より小さい暗騒音を発生する動力源に切り換える操作が行われる。従って、音声認識手段による認識率を向上させることができる。
【００１２】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて説明する。図１は、本発明の一実施形態に係るハイブリッド車両の構成を概略的に示すブロック図である。同図に示すように、このハイブリッド車両１は、例えば内燃機関である第１動力源５と、例えば電気モータ（電動機）である第２動力源６を備え、更に、各動力源５，６のうちの一方を選択するべく切り換え操作を行う動力源切り換え装置（動力源切り換え手段）４を具備している。
【００１３】
また、音声認識装置２、及び該音声認識装置２にて音声認識処理が開始されたことを検出する音声認識開始検出手段（認識開始検出手段）３を備えている。
【００１４】
ここで、周知のように、内燃機関（第１動力源）５は、電気モータ（第２の動力源）６よりも大きい暗騒音を発生する。
【００１５】
次に、本実施形態に係るハイブリッド車両１の動作を、図２に示すフローチャートを参照しながら説明する。
【００１６】
音声認識装置２による音声認識処理が開始されると（ステップＳＴ１）、現在走行時の動力源が暗騒音の大きい動力源であるか、暗騒音の小さい動力源であるかが判断される。つまり、内燃機関５は暗騒音が大きい動力源であり、電気モータ６は暗騒音が小さい動力源であることから、内燃機関５が用いられているか、或いは電気モータ６が用いられているかが判断される（ステップＳＴ２）。
【００１７】
次いで、暗騒音の小さい動力源、即ち、電気モータ６が用いられている場合には（ステップＳＴ２でＮＯ）、音声認識処理を行う上で、認識率の低下が懸念されないので、そのまま音声認識動作を行う（ステップＳＴ４）。
【００１８】
他方、暗騒音の大きい動力源、即ち、内燃機関５が用いられている場合には（ステップＳＴ２でＹＥＳ）、内燃機関（第１動力源）５を停止させ、動力源を電気モータ（第２動力源）６に切り換える操作が行われる（ステップＳＴ３）。つまり、暗騒音が大きい場合には、音声認識処理を行う上で、認識率の低下が懸念されるので、暗騒音の小さい電気モータ６に動力源を切り換える操作が行われる。その後、音声認識動作が行われる（ステップＳＴ４）。
【００１９】
そして、音声認識動作が終了するまで、音声認識処理が継続される（ステップＳＴ５）。
【００２０】
こうして、音声認識装置２による音声認識処理が行われる際には、車両走行の動力源を、暗騒音の大きいもの（内燃機関５）から暗騒音の小さいもの（電気モータ６）に切り換える操作が行われるので、暗騒音による音声認識処理の認識率の低下を防止することができ、確実な音声入力処理を行うことができるのである。
【００２１】
このようにして、本実施形態に係るハイブリッド車両では、音声認識装置２による音声認識処理が開始された際には、このとき使用されている動力源が、内燃機関５であるかどうかが判断され、内燃機関５を使用している場合には、動力源を電気モータ６に切り換える操作が行われる。従って、音声認識時における暗騒音を低減することができ、音声認識処理における認識率を向上させることができる。
【００２２】
以上、本発明のハイブリッド車両を図示の実施形態に基づいて説明したが、本発明はこれに限定されるものではなく、各部の構成は、同様の機能を有する任意の構成のものに置き換えることができる。
【００２３】
例えば、本実施形態では、動力源として第１動力源（内燃機関）５、及び第２動力源（電気モータ）６の、２つの動力源を具備するハイブリッド車両を例に挙げたが、３以上の動力源を有するハイブリッド車両についても適用することができる。
【図面の簡単な説明】
【図１】本発明の一実施形態に係るハイブリッド車両の概略的な構成を示すブロック図である。
【図２】本発明の一実施形態に係るハイブリッド車両における、音声認識処理の手順を示すフローチャートである。
【符号の説明】
１ ハイブリッド車両
２ 音声認識装置
３ 音声認識開始検出手段
４ 動力源切り換え装置
５ 第１動力源（内燃機関）
６ 第２動力源（電気モータ）[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hybrid vehicle provided with a voice recognition device, and more particularly to a technique for reducing background noise of a power source during voice recognition processing.
[0002]
[Prior art]
2. Description of the Related Art In recent years, hybrid vehicles that have both an internal combustion engine and an electric motor as power sources and travel by selecting a power source appropriately in accordance with a traveling state have become widespread. Further, a navigation device or the like mounted on a vehicle is provided with a voice recognition device that can perform a desired input operation of destination data or the like by voice input by a passenger.
[0003]
In a hybrid vehicle, the background noise generated differs between when the power source is an internal combustion engine and when the motor is an electric motor, so that the recognition rate greatly differs. That is, when the power source is an internal combustion engine, a large amount of background noise is generated, which causes a problem that the recognition rate is reduced and a good voice input cannot be performed.
[0004]
As a solution to such a problem, for example, one disclosed in Japanese Patent Application Laid-Open No. 2000-66697 (hereinafter, referred to as Patent Document 1) is known.
[0005]
Japanese Patent Application Laid-Open No. H11-163,086 describes that the database used for speech recognition is changed according to the power source currently used, and processing adapted to ambient noise is performed, thereby improving the recognition rate of speech input. ing.
[0006]
[Patent Document 1]
JP 2000-66697 A
[Problems to be solved by the invention]
When speech recognition is performed in a vehicle equipped with an internal combustion engine, the background noise of the internal combustion engine may be large and the recognition rate may decrease. Further, when the internal combustion engine is used as a driving source, the background noise is larger when the vehicle is running than when the vehicle is stopped, and therefore, in such a case, there is a disadvantage that the recognition rate is reduced.
[0008]
In Patent Document 1 described above, since the database used by the speech recognition device is changed according to the level of the background noise, the background noise itself cannot be reduced, and in a situation where the background noise is large, There is a problem that the recognition rate of the voice recognition processing is reduced.
[0009]
The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a hybrid vehicle that can improve the recognition rate of a voice recognition device.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention relates to a hybrid vehicle having a plurality of power sources having different background noises generated during traveling, and a voice recognition unit, and a recognition unit for detecting a start time of voice recognition by the voice recognition unit. A start detecting means, and a power for switching to a power source having a lower background noise than the currently used power source among the plurality of power sources when the start point of voice recognition is detected by the recognition start detecting means. Source switching means.
[0011]
【The invention's effect】
In the hybrid vehicle according to the present invention, when the voice recognition processing by the voice recognition means is started, it is determined whether or not the power source used at this time generates a large background noise. When the power source generates noise, an operation of switching to a power source generating lower background noise is performed. Therefore, the recognition rate by the voice recognition means can be improved.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram schematically showing a configuration of a hybrid vehicle according to one embodiment of the present invention. As shown in FIG. 1, the hybrid vehicle 1 includes a first power source 5 that is, for example, an internal combustion engine and a second power source 6 that is, for example, an electric motor (electric motor). A power source switching device (power source switching means) 4 for performing a switching operation to select one of them is provided.
[0013]
The apparatus further includes a voice recognition device 2 and a voice recognition start detection unit (recognition start detection unit) 3 that detects that voice recognition processing has been started by the voice recognition device 2.
[0014]
Here, as is well known, the internal combustion engine (first power source) 5 generates a greater background noise than the electric motor (second power source) 6.
[0015]
Next, the operation of the hybrid vehicle 1 according to the present embodiment will be described with reference to the flowchart shown in FIG.
[0016]
When the voice recognition processing by the voice recognition device 2 is started (step ST1), it is determined whether the power source at the time of the current traveling is a power source with a large background noise or a power source with a small background noise. That is, since the internal combustion engine 5 is a power source with high background noise and the electric motor 6 is a power source with low background noise, it is determined whether the internal combustion engine 5 is used or the electric motor 6 is used. Is performed (step ST2).
[0017]
Next, when a power source with low background noise, that is, the electric motor 6 is used (NO in step ST2), there is no concern about a decrease in the recognition rate in performing the voice recognition process. Is performed (step ST4).
[0018]
On the other hand, when the power source having a large background noise, that is, the internal combustion engine 5 is used (YES in step ST2), the internal combustion engine (first power source) 5 is stopped, and the power source is switched to the electric motor (second power source). An operation of switching to (power source) 6 is performed (step ST3). In other words, when the background noise is large, there is a concern that the recognition rate may be reduced in performing the voice recognition process. Therefore, an operation of switching the power source to the electric motor 6 having low background noise is performed. Thereafter, a voice recognition operation is performed (step ST4).
[0019]
Then, the voice recognition process is continued until the voice recognition operation ends (step ST5).
[0020]
Thus, when the voice recognition processing is performed by the voice recognition device 2, an operation of switching the power source of the vehicle running from a loud background noise (internal combustion engine 5) to a loud background noise (electric motor 6) is performed. Therefore, it is possible to prevent a reduction in the recognition rate of the voice recognition process due to the background noise, and to perform a reliable voice input process.
[0021]
In this way, in the hybrid vehicle according to the present embodiment, when the voice recognition processing by the voice recognition device 2 is started, it is determined whether or not the power source used at this time is the internal combustion engine 5. When the internal combustion engine 5 is used, an operation of switching the power source to the electric motor 6 is performed. Therefore, background noise at the time of voice recognition can be reduced, and the recognition rate in voice recognition processing can be improved.
[0022]
As described above, the hybrid vehicle of the present invention has been described based on the illustrated embodiment. However, the present invention is not limited to this, and the configuration of each unit may be replaced with any configuration having the same function. it can.
[0023]
For example, in the present embodiment, a hybrid vehicle including two power sources, that is, a first power source (internal combustion engine) 5 and a second power source (electric motor) 6 as power sources has been described as an example. It can also be applied to a hybrid vehicle having a power source of (1).
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a schematic configuration of a hybrid vehicle according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a procedure of a voice recognition process in the hybrid vehicle according to one embodiment of the present invention.
[Explanation of symbols]
Reference Signs List 1 hybrid vehicle 2 voice recognition device 3 voice recognition start detection means 4 power source switching device 5 first power source (internal combustion engine)
6 Second power source (electric motor)

Claims (3)

走行時に発生する暗騒音が異なる複数の動力源を備えたハイブリッド車両において、
音声認識手段と、
前記音声認識手段にて音声認識の開始時点を検知する認識開始検出手段と、
前記認識開始検出手段にて音声認識の開始時点が検出された際に、前記複数の動力源のうちの、現在用いている動力源よりも暗騒音が小さい動力源に切り換える動力源切り換え手段と、
を備えたことを特徴とするハイブリッド車両。In a hybrid vehicle equipped with a plurality of power sources having different background noises generated when traveling,
Voice recognition means,
Recognition start detection means for detecting the start time of speech recognition in the speech recognition means,
When a start point of voice recognition is detected by the recognition start detection unit, a power source switching unit that switches to a power source having a lower background noise than the currently used power source, among the plurality of power sources,
A hybrid vehicle comprising: 前記動力源切り換え手段は、前記認識開始検出手段にて音声認識の開始時点が検出された際に、前記複数の動力源のうちの、最も暗騒音が小さい動力源に切り換えることを特徴とする請求項１に記載のハイブリッド車両。The power source switching means switches to the power source with the lowest background noise among the plurality of power sources when the recognition start detection means detects the start time of voice recognition. Item 2. The hybrid vehicle according to item 1. 前記複数の動力源は、内燃機関、及び電動機を含み、
前記動力源切り換え手段は、前記内燃機関を動力源としているときに、前記認識開始検出手段にて音声認識の開始時点が検出された場合には、動力源を前記電動機に切り換えることを特徴とする請求項１に記載のハイブリッド車両。The plurality of power sources include an internal combustion engine, and an electric motor,
The power source switching unit switches the power source to the electric motor when the recognition start detection unit detects a start time of voice recognition when the internal combustion engine is used as a power source. The hybrid vehicle according to claim 1.
JP2002333871A 2002-11-18 2002-11-18 Hybrid vehicle Pending JP2004170518A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2416617A (en) * 2004-07-24 2006-02-01 Ford Motor Co A voice warning system for a vehicle
JP2012193018A (en) * 2011-03-16 2012-10-11 Mitsubishi Electric Corp Elevator control system
KR101741661B1 (en) 2016-03-07 2017-05-30 현대자동차주식회사 Voice recognition apparatus, vehicle having the same and control method for the vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2416617A (en) * 2004-07-24 2006-02-01 Ford Motor Co A voice warning system for a vehicle
GB2416617B (en) * 2004-07-24 2008-08-06 Ford Motor Co A voice warning system for a vehicle
US7469173B2 (en) 2004-07-24 2008-12-23 Ford Motor Company Voice notification system for a vehicle
JP2012193018A (en) * 2011-03-16 2012-10-11 Mitsubishi Electric Corp Elevator control system
KR101741661B1 (en) 2016-03-07 2017-05-30 현대자동차주식회사 Voice recognition apparatus, vehicle having the same and control method for the vehicle

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