JP4917702B1 - Battery level detection method, battery level detection device, and audio signal reproduction device - Google Patents

Battery level detection method, battery level detection device, and audio signal reproduction device Download PDF

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JP4917702B1
JP4917702B1 JP2011550348A JP2011550348A JP4917702B1 JP 4917702 B1 JP4917702 B1 JP 4917702B1 JP 2011550348 A JP2011550348 A JP 2011550348A JP 2011550348 A JP2011550348 A JP 2011550348A JP 4917702 B1 JP4917702 B1 JP 4917702B1
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battery
remaining amount
load
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voltage drop
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JPWO2012114374A1 (en
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友昭 越智
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Pioneer Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract

本発明は、蓄電残量を精度良く検出することができる電池の蓄電残量を検出する電池残量検出方法、電池残量検出装置およびオーディオ信号再生装置を提供することを課題とする。
この課題を解決する手段として、本発明の電池残量検出方法は、電池を電源とし、音響信号を所定時間供給することにより音響負荷を駆動する負荷駆動工程と、音響負荷の駆動による電池の電圧降下を測定する電圧降下測定工程と、測定した電圧降下に基づいて、電池の蓄電残量を検出する残量検出工程と、を備えたものである。
【選択図】図１It is an object of the present invention to provide a battery remaining amount detection method, a battery remaining amount detection device, and an audio signal reproduction device that can detect the remaining amount of storage of a battery with high accuracy.
As a means for solving this problem, the battery remaining amount detection method of the present invention uses a battery as a power source, a load driving step of driving an acoustic load by supplying an acoustic signal for a predetermined time, and a voltage of the battery by driving the acoustic load. A voltage drop measuring step for measuring a drop, and a remaining amount detecting step for detecting the remaining amount of storage of the battery based on the measured voltage drop.
[Selection] Figure 1

Description

本発明は、電池の蓄電残量を検出する電池残量検出方法、電池残量検出装置およびオーディオ信号再生装置に関するものである。   The present invention relates to a remaining battery level detection method, a remaining battery level detection apparatus, and an audio signal reproduction apparatus that detect a remaining battery charge level.

従来のこの種の電池残量検出装置（方法）として、乾電池良否チェッカーに適用したものが知られている。この電池残量検出装置は、検出対象となる乾電池に、負荷抵抗となる豆電球を並列に接続すると共に、タイマー回路を直列に接続し、パルス電圧測定回路により、約１秒間、乾電池の両端子間の電圧を測定する。測定した電圧値は、いったん記憶回路に記憶させ、この記憶内容を表示部に表示するようにしている。   As a conventional battery remaining amount detection device (method) of this type, a device applied to a dry cell pass / fail checker is known. This battery remaining amount detection device is connected to a dry battery as a detection target in parallel with a miniature bulb as a load resistance, and a timer circuit connected in series, and both terminals of the dry battery for about 1 second by a pulse voltage measurement circuit. Measure the voltage between. The measured voltage value is temporarily stored in the storage circuit, and the stored content is displayed on the display unit.

実開昭６２−２４３７３号公報Japanese Utility Model Publication No. 62-24373

ところで、乾電池等では、使用により内部抵抗が増加し、内部抵抗による電圧降下のために、実負荷時の電圧降下が著しくなる。このため、実用に耐えない程度に蓄電残量が低下しても、軽負荷の場合には出力電圧があまり低下しないことが知られている。
従来の電池残量検出装置（方法）では、負荷として豆電球を用いているため、検査対象の電池が、実用に耐え得るか否かを容易に判定することができる。しかし、実用に供される電池は、電力供給する対象物が区々であり、負荷として擬似負荷（豆電球）を用いても、電池残量を精度良く検出することができない問題があった。特に、小型のオーディオ信号再生装置等では、電池残量を精度良く検出できない場合には、楽曲が途中で終了してしまう等の不具合が生ずる。By the way, in a dry battery or the like, the internal resistance increases due to use, and the voltage drop at the actual load becomes remarkable due to the voltage drop due to the internal resistance. For this reason, it is known that the output voltage does not decrease much in the case of a light load even if the remaining amount of power storage is reduced to an extent that cannot be practically used.
In the conventional battery remaining amount detection apparatus (method), since a miniature light bulb is used as a load, it can be easily determined whether or not the battery to be inspected can withstand practical use. However, batteries for practical use have various objects to be supplied with power, and there is a problem that the remaining battery level cannot be detected accurately even if a pseudo load (bean bulb) is used as a load. In particular, in a small audio signal reproducing device or the like, when the remaining battery level cannot be detected with high accuracy, a problem such as the music being terminated halfway occurs.

本発明は、蓄電残量を精度良く検出することができる電池の蓄電残量を検出する電池残量検出方法、電池残量検出装置およびオーディオ信号再生装置を提供することを課題としている。   An object of the present invention is to provide a battery remaining amount detection method, a battery remaining amount detection device, and an audio signal reproduction device that detect the remaining amount of storage of a battery that can accurately detect the remaining amount of storage.

本発明の電池残量検出方法は、電池を電源とし、音響信号を所定時間供給することにより音響負荷を駆動する負荷駆動工程と、音響負荷の駆動による電池の電圧降下を測定する電圧降下測定工程と、測定した電圧降下に基づいて、電池の蓄電残量を検出する残量検出工程と、を備え、音響信号が、非可聴周波数帯域の信号であることを特徴とする。 The battery remaining amount detection method of the present invention uses a battery as a power source, a load driving step of driving an acoustic load by supplying an acoustic signal for a predetermined time, and a voltage drop measuring step of measuring a voltage drop of the battery due to the driving of the acoustic load. And a remaining amount detecting step for detecting the remaining amount of electricity stored in the battery based on the measured voltage drop , wherein the acoustic signal is a signal in a non-audible frequency band .

本発明の電池残量検出装置は、電池から電力を所定時間供給し、音響信号に基づいて音響負荷を駆動する負荷駆動手段と、音響負荷の駆動による電池の電圧降下を測定する電圧降下測定手段と、測定した電圧降下に基づいて、電池の蓄電残量を検出する残量検出手段と、を備え、音響信号が、非可聴周波数帯域の信号であることを特徴とする。 A battery remaining amount detection device according to the present invention includes a load driving unit that supplies electric power from a battery for a predetermined time and drives an acoustic load based on an acoustic signal, and a voltage drop measuring unit that measures a voltage drop of the battery due to the driving of the acoustic load. And a remaining amount detecting means for detecting the remaining amount of electricity stored in the battery based on the measured voltage drop , wherein the acoustic signal is a signal in a non-audible frequency band .

これらの構成によれば、音響負荷の駆動による電池の電圧降下を測定し、その測定結果に基づいて、電池の蓄電残量を検出するようにしているため、電池の蓄電残量（電池残量）を精度良く検出することができる。
また、電池残量の検出のために音響負荷を駆動するが、人間の耳に音響として捉えられないため、雑音や騒音を伴うことなく、電池残量を検出することができる。 According to these configurations, since the voltage drop of the battery due to the driving of the acoustic load is measured and the remaining battery charge level is detected based on the measurement result, the remaining battery charge level (battery charge level) ) Can be detected with high accuracy.
Moreover, although an acoustic load is driven to detect the remaining battery level, the remaining battery level can be detected without noise and noise because it is not captured as sound by the human ear.

上記の電池残量検出方法において、音響信号が、正弦波信号であることが好ましい。   In the above battery remaining amount detection method, the acoustic signal is preferably a sine wave signal.

上記の電池残量検出装置において、音響信号が、正弦波信号であることが好ましい。   In the above battery remaining amount detection device, the acoustic signal is preferably a sine wave signal.

これらの構成によれば、必要とする音響信号を簡単に生成し且つ記憶しておくことができる。   According to these configurations, a necessary acoustic signal can be easily generated and stored.

上記の電池残量検出方法において、音響負荷が、スピーカーであることが好ましい。   In the above battery remaining amount detection method, the acoustic load is preferably a speaker.

上記の電池残量検出装置において、音響負荷が、スピーカーであることが好ましい。   In the above battery remaining amount detection device, the acoustic load is preferably a speaker.

これらの構成によれば、スピーカーを用いることにより、典型的な音響負荷を駆動することができ、実使用負荷に即した負荷による電池残量の検出が可能となる。   According to these configurations, it is possible to drive a typical acoustic load by using the speaker, and it is possible to detect the remaining battery level with a load corresponding to the actual use load.

本発明のオーディオ信号再生装置は、上記した電池残量検出装置を備えたことを特徴とする。   An audio signal reproduction device according to the present invention includes the above-described battery remaining amount detection device.

この構成によれば、擬似負荷ではなく、音響負荷という実使用負荷を使用して、電圧値（電圧降下）を測定することになるため、音響負荷に即して電池残量を精度良く検出することができる。したがって、電池が使用に耐えるか否かを正確に判定することができる。   According to this configuration, since the voltage value (voltage drop) is measured using an actual load such as an acoustic load instead of a pseudo load, the remaining battery level is accurately detected according to the acoustic load. be able to. Therefore, it can be accurately determined whether or not the battery can withstand use.

本発明の実施形態に係るオーディオ信号再生装置のブロック図である。1 is a block diagram of an audio signal reproduction device according to an embodiment of the present invention. 電池残量の表示形態を表した説明図である。It is explanatory drawing showing the display form of the battery remaining charge.

以下、添付の図面を参照して、本発明の電池残量検出方法および電池残量検出装置を適用した、オーディオ信号再生装置について説明する。このオーディオ信号再生装置は、主に乾電池で駆動する小型のオーディオ機器であり、使用する乾電池の電池残量を検出する電池残量検出装置を搭載して、構成されている。   Hereinafter, an audio signal reproducing apparatus to which a remaining battery level detection method and a remaining battery level detection apparatus of the present invention are applied will be described with reference to the accompanying drawings. This audio signal reproduction device is a small audio device that is mainly driven by a dry battery, and is configured to include a remaining battery level detection device that detects the remaining battery level of a dry battery to be used.

図１に示すように、オーディオ信号再生装置１は、乾電池（電池）１１、電源回路１２、Ａ／Ｄコンバータ１３、メモリ１４、ＣＰＵ（Central Processing Unit）１５、操作部２１、表示部２２、オーディオデコーダ２３、オーディオアンプ２４およびスピーカー２５（音響負荷）を備えている。このうち、乾電池１１、電源回路１２、Ａ／Ｄコンバータ１３、メモリ１４およびＣＰＵ１５により、電池残量検出装置１０が構成される。   As shown in FIG. 1, the audio signal reproducing apparatus 1 includes a dry battery (battery) 11, a power supply circuit 12, an A / D converter 13, a memory 14, a CPU (Central Processing Unit) 15, an operation unit 21, a display unit 22, and an audio. A decoder 23, an audio amplifier 24, and a speaker 25 (sound load) are provided. Among these, the dry battery 11, the power supply circuit 12, the A / D converter 13, the memory 14, and the CPU 15 constitute the battery remaining amount detection device 10.

操作部２１は、ボタンやスイッチ等により構成され、各種オーディオ操作（再生、一時停止、早送り／巻き戻しなど）の他、電源投入指示や、電池残量の測定指示を行うために用いられる。表示部２２は、液晶ディスプレイやＥＬ表示器等により構成され、電池残量を示す残量表示（図２参照）など、各種情報を表示する。本実施形態では、操作部２１により、電源投入指示または電池残量の測定指示があった場合、電池残量を示す情報を表示する。オーディオデコーダ２３は、メモリ１４から読み出した楽曲データをデコードし、オーディオアンプ２４に出力する。スピーカー２５は、オーディオアンプ２４によって増幅された音声信号を外部出力する。なお、スピーカー２５は、１個であっても良いし、複数個（高音域用、中音域用、低音域用など）であっても良い。また、オーディオアンプ２４およびスピーカー２５を別体の装置としても良い。この場合、オーディオ信号再生装置１の装置本体と別体の装置とは、有線接続であっても良いし、無線接続であっても良い。   The operation unit 21 includes buttons, switches, and the like, and is used to perform various audio operations (playback, pause, fast forward / rewind, etc.), power on instruction, and battery remaining amount measurement instruction. The display unit 22 includes a liquid crystal display, an EL display, and the like, and displays various types of information such as a remaining amount display (see FIG. 2) indicating the remaining battery level. In the present embodiment, when a power-on instruction or a battery remaining amount measurement instruction is given by the operation unit 21, information indicating the remaining battery amount is displayed. The audio decoder 23 decodes the music data read from the memory 14 and outputs it to the audio amplifier 24. The speaker 25 outputs the audio signal amplified by the audio amplifier 24 to the outside. The number of speakers 25 may be one, or a plurality of speakers (for high sound range, medium sound range, low sound range, etc.). The audio amplifier 24 and the speaker 25 may be separate devices. In this case, the apparatus main body and the separate apparatus of the audio signal reproduction apparatus 1 may be wired connection or wireless connection.

乾電池１１は、マンガン電池、アルカリ電池またはニッケル水素電池のいずれかを用いる。電源回路１２は、乾電池１１から供給される電力を入力し、オーディオ信号再生装置１内の各部に電力を出力する。Ａ／Ｄコンバータ１３は、電源回路１２の上流側における乾電池１１の電圧を検出し、当該検出結果をＡ／Ｄ変換してＣＰＵ１５に出力する。   As the dry battery 11, any of a manganese battery, an alkaline battery, or a nickel metal hydride battery is used. The power supply circuit 12 inputs power supplied from the dry battery 11 and outputs power to each unit in the audio signal reproduction device 1. The A / D converter 13 detects the voltage of the dry battery 11 on the upstream side of the power supply circuit 12, A / D converts the detection result, and outputs the result to the CPU 15.

メモリ１４は、フラッシュメモリ等の不揮発性記憶装置であり、楽曲ファイルを記憶する楽曲ファイル記憶領域１４ａと、電池残量測定用の正弦波信号（音響信号，以下、「測定用Ｓｉｎ波」と表記する）を記憶する測定用Ｓｉｎ波記憶領域１４ｂと、を有している。楽曲ファイル記憶領域１４ａは、楽曲データ（音声波形信号）および楽曲情報（楽曲データに付加されるメタデータ、および楽曲解析データなど）を記憶する。また、測定用Ｓｉｎ波記憶領域１４ｂは、測定用Ｓｉｎ波として、可聴帯域外（例えば、２０ＫＨｚ以上）の周波数信号を記憶する。このように、負荷の大きい高音域の周波数信号を用いて電池残量を測定することで、より正確な測定値を得ることができる。なお、測定用Ｓｉｎ波も、楽曲データの一つとして、楽曲ファイル記憶領域１４ａ内に記憶する構成としても良い。   The memory 14 is a non-volatile storage device such as a flash memory, a music file storage area 14a for storing music files, and a sine wave signal (acoustic signal, hereinafter referred to as “measurement sine wave”) for measuring the remaining battery level. And a sine wave storage area 14b for measurement. The music file storage area 14a stores music data (audio waveform signals) and music information (metadata added to music data, music analysis data, etc.). The measurement sine wave storage area 14b stores a frequency signal outside the audible band (for example, 20 KHz or more) as the measurement sine wave. In this way, a more accurate measurement value can be obtained by measuring the remaining battery level using a high frequency signal with a high load. Note that the Sin wave for measurement may be stored in the music file storage area 14a as one piece of music data.

ＣＰＵ１５は、オーディオデコーダ２３に対する音声制御および表示部２２に対する表示制御など、オーディオ信号再生装置１内の各部を制御する。また、負荷駆動手段１５ａ、電圧降下測定手段１５ｂおよび残量検出手段１５ｃとして機能する。   The CPU 15 controls each unit in the audio signal reproduction device 1 such as audio control for the audio decoder 23 and display control for the display unit 22. Moreover, it functions as the load driving means 15a, the voltage drop measuring means 15b, and the remaining amount detecting means 15c.

負荷駆動手段１５ａは、測定用Ｓｉｎ波記憶領域１４ｂから読み出した測定用Ｓｉｎ波を、所定時間（数秒程度）オーディオデコーダ２３に供給することにより、オーディオアンプ２４およびスピーカー２５を駆動する。なお、負荷駆動手段１５ａは、操作部２１による操作をトリガとして、測定用Ｓｉｎ波の供給を開始する。   The load driving unit 15a drives the audio amplifier 24 and the speaker 25 by supplying the measurement Sin wave read from the measurement Sin wave storage area 14b to the audio decoder 23 for a predetermined time (about several seconds). Note that the load driving unit 15a starts supplying the measurement Sin wave with the operation by the operation unit 21 as a trigger.

電圧降下測定手段１５は、負荷駆動手段１５ａの駆動制御による乾電池１１の電圧降下を測定する。具体的には、負荷駆動手段１５ａにより測定用Ｓｉｎ波が所定時間供給され、オーディオアンプ２４およびスピーカー２５が駆動されたことにより電圧値が降下している間の電圧値を、Ａ／Ｄコンバータ１３から取得する。残量検出手段１５ｃは、電圧降下測定手段１５により測定した電圧降下（負荷駆動手段１５ａによる負荷駆動中の電圧値）に基づいて、乾電池１１の蓄電残量を検出する。なお、検出した電圧値から蓄電残量を求める算出アルゴリズムは公知のものを適用可能である。また、電圧値と蓄電残量との関係を１対１で対応付けたテーブルを参照して、蓄電残量を求めても良い。   The voltage drop measuring unit 15 measures the voltage drop of the dry battery 11 by the drive control of the load driving unit 15a. More specifically, the voltage value while the voltage Sink is supplied by the load driving means 15a for a predetermined time and the audio amplifier 24 and the speaker 25 are driven is reduced to the A / D converter 13. Get from. Based on the voltage drop measured by the voltage drop measuring unit 15 (voltage value during load driving by the load driving unit 15a), the remaining amount detecting unit 15c detects the remaining amount of charge in the dry battery 11. Note that a known algorithm can be applied as a calculation algorithm for obtaining the remaining power amount from the detected voltage value. Further, the remaining amount of electricity stored may be obtained by referring to a table in which the relationship between the voltage value and the remaining amount of electricity stored is correlated one-on-one.

次に、図２を参照して、ＣＰＵ１５により表示制御される表示部２２の残量表示について説明する。表示部２２における電池残量の残量表示は、例えば図２（ａ）に示すように、乾電池１１を横置きのボトル５０の形状で表示すると共に、このボトル５０内を複数（図示のものは、３つ）の横充電部位５１に区画し、この複数の横充電部位５１を順に消去表示することで、蓄電残量を表示するようにしている。   Next, with reference to FIG. 2, the remaining amount display of the display unit 22 controlled by the CPU 15 will be described. For example, as shown in FIG. 2A, the battery remaining amount display on the display unit 22 displays the dry battery 11 in the shape of a horizontally placed bottle 50, and a plurality of bottles 50 (the one shown in the figure is shown). 3), and the remaining charge amount is displayed by sequentially erasing and displaying the plurality of lateral charge portions 51.

同様に、図２（ｂ）のものでは、横置きのボトル５０内に表示した複数（図示のものは、２つ）の斜線５２により蓄電量を表示すると共に、この複数の斜線５２を順に消去表示することで、蓄電残量を表示するようにしている。
さらに、図２（ｃ）のものでは、縦置きのボトル５０内に区画表示した複数（図示のものは、３つ）の縦充電部位５３により蓄電量を表示すると共に、この複数の縦充電部位５３を順に消去表示することで、蓄電残量を表示するようにしている。Similarly, in the case of FIG. 2 (b), the storage amount is displayed by a plurality of (two in the figure) hatched lines 52 displayed in the horizontally placed bottle 50, and the plurality of hatched lines 52 are sequentially deleted. By displaying, the remaining amount of power storage is displayed.
Further, in the case of FIG. 2 (c), the storage amount is displayed by a plurality of (three in the drawing) vertical charging portions 53 displayed in a compartment in the vertically placed bottle 50, and the plurality of vertical charging portions. The remaining amount of electricity stored is displayed by sequentially deleting 53.

以上のように、本実施形態によれば、オーディオアンプ２４およびスピーカー２５を所定時間駆動して、乾電池１１の電圧降下を測定し、その測定結果に基づいて、乾電池１１の蓄電残量を検出するようにしているため、乾電池１１の蓄電残量（電池残量）を精度良く検出することができる。すなわち、実使用負荷により、乾電池１１の電池残量を検出しているため、電源を構成する乾電池１１が、実用に耐え得るか否かを容易に且つ確実に判定することができる。   As described above, according to the present embodiment, the audio amplifier 24 and the speaker 25 are driven for a predetermined time, the voltage drop of the dry battery 11 is measured, and the remaining charge of the dry battery 11 is detected based on the measurement result. As a result, the remaining power level (remaining battery level) of the dry battery 11 can be accurately detected. That is, since the battery remaining amount of the dry battery 11 is detected based on the actual use load, it can be easily and reliably determined whether or not the dry battery 11 constituting the power source can withstand practical use.

１ オーディオ再生装置 １０ 電池残量検出装置
１１ 乾電池 １３ Ａ／Ｄコンバータ
１４ メモリ １４ｂ 測定用Ｓｉｎ波
１５ ＣＰＵ １５ａ 負荷駆動手段
１５ｂ 電圧降下測定手段 １５ｃ 残量検出手段
２１ 操作部 ２２ 表示部
２３ オーディオデコーダ ２４ オーディオアンプ
２５ スピーカー
DESCRIPTION OF SYMBOLS 1 Audio reproduction apparatus 10 Battery remaining charge detection apparatus 11 Dry battery 13 A / D converter 14 Memory 14b Sin wave for measurement 15 CPU 15a Load drive means 15b Voltage drop measurement means 15c Remaining quantity detection means 21 Operation part 22 Display part 23 Audio decoder 24 Audio amplifier 25 Speaker

Claims (7)

電池を電源とし、音響信号を所定時間供給することにより音響負荷を駆動する負荷駆動工程と、
前記音響負荷の駆動による前記電池の電圧降下を測定する電圧降下測定工程と、
測定した前記電圧降下に基づいて、前記電池の蓄電残量を検出する残量検出工程と、を備え、
前記音響信号が、非可聴周波数帯域の信号であることを特徴とする電池残量検出方法。A load driving step of driving an acoustic load by supplying an acoustic signal for a predetermined time using a battery as a power source;
A voltage drop measuring step of measuring a voltage drop of the battery due to driving of the acoustic load;
A remaining amount detecting step for detecting a remaining amount of electricity stored in the battery based on the measured voltage drop, and
The method of detecting a remaining battery capacity , wherein the acoustic signal is a signal in an inaudible frequency band . 前記音響信号が、正弦波信号であることを特徴とする請求項１に記載の電池残量検出方法。The method of claim 1 , wherein the acoustic signal is a sine wave signal. 前記音響負荷が、スピーカーであることを特徴とする請求項１に記載の電池残量検出方法。The method of claim 1 , wherein the acoustic load is a speaker. 電池から電力を所定時間供給し、音響信号に基づいて音響負荷を駆動する負荷駆動手段と、
前記音響負荷の駆動による前記電池の電圧降下を測定する電圧降下測定手段と、
測定した前記電圧降下に基づいて、前記電池の蓄電残量を検出する残量検出手段と、を備え、
前記音響信号が、非可聴周波数帯域の信号であることを特徴とする電池残量検出装置。Load driving means for supplying power from the battery for a predetermined time and driving an acoustic load based on an acoustic signal;
Voltage drop measuring means for measuring a voltage drop of the battery due to driving of the acoustic load;
A remaining amount detecting means for detecting a remaining amount of electricity stored in the battery based on the measured voltage drop, and
The battery remaining amount detection device , wherein the acoustic signal is a signal in an inaudible frequency band . 前記音響信号が、正弦波信号であることを特徴とする請求項４に記載の電池残量検出装置。The battery remaining amount detection device according to claim 4 , wherein the acoustic signal is a sine wave signal. 前記音響負荷が、スピーカーであることを特徴とする請求項４に記載の電池残量検出装置。The battery residual quantity detection device according to claim 4 , wherein the acoustic load is a speaker. 請求項４に記載の電池残量検出装置を備えたことを特徴とするオーディオ信号再生装置。An audio signal reproducing device comprising the battery remaining amount detecting device according to claim 4 .
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