201250632 六、發明說明： 【發明所屬之技術領域】 本發明係關於例如火災警報器、氣體洩 報器，尤其係關於電池式的警報器。 【先前技術】 以往，例如專利文獻1之記載所示，例 器中，電池式的類型當然若長期間使用時， 會到達使用壽命。亦即，在使用期間結束時 電池的電壓會降低，甚至照原樣放置時，最 。因此，在住宅用火災警報器係附加有以下 視作爲電源的電池的電壓降低，若電池電壓 停止的電壓値時，即通知替換電池（或者警 換時期到來）。 接著，在專利文獻1的發明中，提出一 期間結束的微妙的電池電壓値中，亦可正確 電壓降低的電池電壓降低的基準値設定方法 此外，以電池式的警報器而言，係有例 報器等，而非侷限於上述火災警報器。其中 漏警報器’有眾多使用透過插頭等所得ί AC100V)的類型（當然在內部轉換成例如 直流電源進行動作），但是近來亦已開發出 第8圖係習知的電池式的氣體洩漏警報 圖示之例的氣體洩漏警報器係具有：電 漏警報器等警 如在火災警報 則任何電池均 ，作爲電源的 後會停止功能 功能：常時監 接近成爲功能 報器全體的替 種即使在使用 且廉價地監視 〇 如氣體洩漏警 ，關於氣體洩 I商用電源（ DC5V等而以 一種電池式。 器的電路圖。 池部1、氣體 -5- 201250632 感測器2、控制電路部3、普報部4、周圍溫度檢測部5、 定電壓電路部6、定電歷電路部7、3個開關SW1、SW2 、SW3、及負荷電阻R1 ^其中，swi、SW2、SW3係例如 雙極電晶體等半導體切換元件，藉由控制電路部3進行 ON/ OFF控制。此外，氣體感測器2係由感測器電阻2a 與加熱器電阻2 b所構成。 其中，之後將定電壓電路部6稱爲第1定電壓電路部 6，定電壓電路部7稱爲第2定電壓電路部7，以易於區 別兩者來進行說明。 首先’說明使用上述氣體感測器2(由感測器電阻2a 與加熱器電阻2b所構成）的氣體偵測。 以一例而言，感測器電阻2a係1 OOkQ等高電阻，加 熱器電阻2b係100Ω左右的低電阻。藉由驅動加熱器電 阻2b加熱至作爲氣體偵測元件的感測器電阻2a的動作溫 度（400 °C左右）。因此，在加熱器電阻2b係流通大電流 ，電力消耗量大。 控制電路部3係藉由計測如上所述加熱至動作溫度的 狀態的感測器電阻2 a的電阻値，可進行判定有無氣體。 其中’該計測/判定方法一般爲眾所週知者，在此並未特 別說明。其中，上述加熱至動作溫度所耗費的時間會受到 周圍溫度影容，因此會有亦進行根據藉由周圍溫度檢測部 5所被檢測的周圍溫度，來決定加熱器電阻2b的驅動時 間等處理的情形。 關於感測器電阻2a，形成有由感測器電阻2a、負荷 -6 - 201250632 電阻R1、開關SW3所成之串聯電路。關於加熱器 ，形成有由開關SW1、第1定電壓電路部6、加熱 2b、開關SW2所成之串聯電路。並聯連接該等2 電路，施加藉由第2定電壓電路部7(例如升壓電 致之預定電壓（例如3.3V)。此外，對於加熱器1 施加藉由第1定電壓電路部6(降壓電路）所致之 壓（例如2.0V )。 在此，控制電路部3爲微電腦等，藉由執行預 在其內置記憶體的預定的應用程式，來進行氣體洩 器的控制。以該控制的一部分而言，進行以固定周 氣體感測器2的感測器値的處理。 此係以例如6 0秒周期在1 〇 〇m s左右的期間電 至氣體感測器2。此係每隔60秒，在100ms期間 開關SW1、SW2、SW3全部進行ON控制（由圖示 端子OUT1、OUT2、OUT3進行ON訊號輸出）。 對感測器電阻2 a係供予藉由上述第2定電壓電路 致之上述3.3V電壓，對加熱器電阻2b係供予藉由 1定電壓電路部6所致之上述2.0V電壓，藉此使 測器2進行動作。 控制電路部3係由圖示的輸入端子AD2輸入 測器電阻2a之電阻値變化的電壓値，據此來進行 氣體洩漏判定處理。接著，若判定出有氣體洩漏時 警報部4進行控制且進行警報/通知。 其中，警報部4係具有：屬於蜂鳴器等的警報 電阻2b 器電阻 個串聯 路）所 電阻2b 預定電 先儲存 漏警報 期測定 源供給 將3個 的輸出 由此， 部7所 上述第 氣體感 表示感 預定的 ，係對 聲輸出 201250632 部4a、屬於LED等的啓報顯示部4b、屬於用以對外部進 行訊號輸出的介面等的外部啓報輸出部4c等。控制電路 部3係控制該等，例如發出蜂鳴器聲音、或使LED亮燈 /滅燈，藉此通知氣體洩漏發生。 在此，電池部1係本氣體洩漏普報器的主電源，在本 例中爲3.0V的電壓的電源。將該電源電壓（3.0V)供予 至藉由第2定電壓電路部7進行升壓（亦有降壓的情形） 的控制電路部3或氣體感測器2等。在此假設爲升壓至 3.3V 者。 此外，第1定電壓電路部6係將上述第2定電壓電路 部7的輸出電壓（在此如上所述爲3.3V)降壓至例如 2.0V的降壓電路，降壓後的電壓（2.0V )成爲加熱器電 阻2b的驅動電壓。亦即，關於加熱器電阻2b的驅動，在 藉由第2定電壓電路部7進行升壓之後，藉由第1定電壓 電路部6進行降壓（3.0V —3.3V —2.0V)，在第1定電壓 電路部6與第2定電壓電路部7雙重產生損失，效率非常 差，大多使用電池電流。 其中，加熱器電阻2b係消耗電力非常大的構成要素 ，若與加熱器電阻2b相比，控制電路部3或感測器電阻 2a等的消耗電力甚微。 此外，其中，第1定電壓電路部6爲例如降壓截波器 等DC-DC轉換器等。此外，第2定電壓電路部7亦爲例 如升壓截波器或降壓截波器等DC-DC轉換器等。 此外，雖未圖示，亦有不存在第2定電壓電路部7的 201250632 習知例。此時，在上述電池使用末期，若電池電壓降低， 尤其基於加熱器電阻2b的驅動電壓的問題，而無法正常 動作。 亦即，若爲該例之情形，係將電源電壓（電池部1的 電壓3.0V )供予至氣體感測器2或控制電路部3，第1定 電壓電路部6係將該電源電壓（3V)降壓至上述2.0V。 接著，若成爲電池使用末期而電池部1的電壓下降，則第 1定電壓電路部6的輸出電壓亦下降，而使加熱器電阻2b 的驅動電壓降低。 若伴隨著如上所示電池電壓的降低，以致加熱器電阻 2b的驅動電壓降低時，變得無法加熱至上述動作溫度爲 止。因此，變得無法進行上述「計測加熱至動作溫度爲止 的狀態的感測器電阻2a的電阻値」，無法正常計測，因 而亦無法進行正常的氣體洩漏判定。亦即，無法正常動作 〇 相對於此，如第8圖所示之習知例所示，若有第2定 電壓電路部7(升壓截波器），與如上所述沒有升壓截波 器的構成相比，即使在電池使用末期，電池電壓降低，亦 可以較長的時間正常動作。 但是，如前所述，在平常時，因升壓截波器與降壓截 波器而雙重產生損失，而大量使用電池電流，因此結果導 致壽命變短的可能性高。 [專利文獻1 ]日本特開2 0 0 8 - 1 2 3 3 4 7號公報 201250632 【發明內容】 在此，氣體洩漏普報器通常在未維修下使用5年。因 此，即使在電池式的氣體洩漏普報器中，亦必須未替換電 池而可使用5年》 若裝置多數電池個數，雖可充分滿足5年的使用期間 ，但是由製品成本或製品外形/製品重量等方面來看，亦 以減少所裝載的電池個數爲市場所期望，必須減少機器的 電力消耗，而以較少的電池個數來滿足5年的使用期間。 爲了滿足如上所述之市場要求，即使在電池使用末期 ，亦以儘可能長久正常動作爲宜，但是如上所述，若在之 前在平常時電力消耗多時，結果作爲瞢報器的壽命無法變 長的可能性極高。 其中，上述專利文獻1並未考慮到任何有關如上所示 之要求。 其中，在上述習知構成中，例如第1定電壓電路部6 爲降壓截波器等，控制電路部3藉由來自其輸出端子 OUT3的控制訊號來進行所謂“截波器控制”時，按照電池 部1的電壓降低來變更“截波器控制”的工作比（duty ratio)等，亦可將加熱器電阻2b的驅動電壓維持在預定 値（2.0 V ) ’但是在此亦有界限。例如，若電池部1的電 壓成爲未達2.2V時，第丨定電壓電路部6的輸出係未達 2.0V，而變得無法正常動作。 本發明之課題在提供一種關於電池式的昝報器，尤其 -10- 201250632 係關於有關感測器驅動的構成，可減少電池消耗的損失， 而且，在電池使用末期可延長可正常動作的時間，因而可 實現警報器的長壽命化的電池式警報器等。 本發明之電池式警報器係以至少具有感測器部與電池 的電池式警報器爲前提，具有下列構成。 首先，具有將上述電池電壓進行升壓的升壓電路部。 另外具有：用以將前述電池電壓供予至前述感測器部 的第1電力供給路；及設在該第1電力供給路上的第1開 關手段。 另外具有：用以將藉由前述升壓電路部所被升壓的電 壓供予至前述感測器部的第2電力供給路；及設在該第2 電力供給路上的第2開關手段。 另外具有將前述第1開關手段、第2開關手段進行 ΟΝ / Ο F F控制的控制手段。 接著，上述控制手段係監視前述電池電壓，若在該電 池電壓爲預定的臨限値以上的情形下，在前述感測器部驅 動時，將前述第1開關手段進行ON控制而將前述電池電 壓供予至前述感測器部。此外，若在該電池電壓爲未達預 定的臨限値的情形下，在前述感測器部驅動時，將前述第 2開關手段進行ON控制而將藉由前述升壓電路部所被升 壓的電壓供予至前述感測器部。 若成爲電池使用末期而電池電壓爲未達預定的臨限値 ，關於感測器驅動，以電池電壓會成爲不充分，因此藉由 使用升壓後的電壓，可延長在電池使用末期可進行正常動 -11 - 201250632 作的時間。而且，如上所示之電池使用末期以外的平常時 ，係藉由使用電池電壓，可減少電池消耗的損失。因此， 可達成電池式普報器的長壽命化。 電池式瞀報器係例如氣體洩漏瞢報器。 此時，前述感測器部係例如氣體感測器中的加熱器電 阻、和與該加熱器電阻作串聯連接的降壓電路，該降壓電 路係將前述電池電壓或前述升壓後的電壓進行降壓，前述 加熱器電阻係藉由該降壓後的電壓予以驅動。若爲該例之 情形，藉由利用升壓電路部升壓後的電壓來驅動感測器部 ，係將電池電壓藉由升壓電路部進行升壓，藉由降壓電路 進行降壓，而形成爲雙重損失。相對於此，如上所述在平 常時係藉由使用電池電壓，可減少電池消耗的損失。 【κ施方式】 以下參照圖示，說明本發明之實施形態。 在第1圖中顯示本例之電池式之氣體洩漏昝報器的電 路圖。 其中，此係藉由與第8圖所示之習知的電池式的氣體 洩漏普報器的電路圖相比較，爲易於理解本例之瞀報器的 電路構成特徵的構成例，並非侷限於此例。此外，亦可適 用於火災普報器等其他笤報器，而非限定於氣體洩漏警報 器。但是，當然侷限於電池式的眢報器。 其中，第1圖所示之本例之電池式的氣體洩漏瞢報器 10的電路的各種構成要素之中，對於與第8圖所示之習 -12- 201250632 知電路的構成要素爲大致相同者標註相同元件符號，且省 略其說明或簡化。 在第1圖中’電池部1係與習知技術相同，爲氣體洩 漏警報器10的主電源’在本例中亦爲3V電壓的電源。 此外’氣體感測器2係其本身的構成與習知技術相同，具 有感測器電阻2 a、加熱器電阻2b者。此外，關於感測器 電阻2a，負荷電阻R1與開關SW3呈串聯連接的構成亦 與習知技術相同。同樣地，關於加熱器電阻2b，串聯連 接開關SW1、第1定電壓電路部6、開關SW2的構成亦 與習知技術相同。 此外，具有：屬於蜂鳴器等之警報聲輸出部4a、屬 於LED等之警報顯示部4b、屬於用以對外部進行訊號輸 出的介面等的外部警報輸出部4c等的警報部4、及對該 警報部4的控制電路部1 1的控制處理亦可與習知技術相 同。關於周圍溫度檢測部5與對應周圍溫度的控制處理， 亦可與習知技術相同。 其中，控制電路部11亦進行與上述習知的控制電路 部3大致同樣的處理，但是亦執行後述第2圖（a)、（b)、 第 4 圖（a)、（b)、第 5 圖（a)、（b)、第 6 圖（a)、（b)、第 7 圖（a)、（b)等流程的處理。此係執行任1個以上的流程的 處理》 控制電路部1 1爲微電腦等，由CPU等執行預先儲存 在其內置記憶體的預定的應用程式’藉此實現與上述習知 技術大致同樣的處理或後述第2圖（a)、（b)、第4圖（a)、 -13- 201250632 (b)〜第7圖（a)、（b)等流程的處理。 此外，關於控制電路部11的輸出入端子，與上述習 知的控制電路部3爲大致同樣的端子係標註相同符號，與 習知不同之處爲設有圖示的輸出端子OUT2與輸入端子 AD1。藉由來自該輸出端子OUT2的ΟΝ/OFF輸出，將 圖示的開關SW4進行ON/ OFF控制。此外，輸入端子 AD 1係與電池部1相連接，控制電路部1 1係監視電池部 1的電壓（電源電壓）。 在此，在本電路中係設置升壓電路部12，來取代第8 圖之習知電路中的第2定電壓電路部7。但是，在習知技 術中，亦列舉升壓電路作爲第2定電壓電路部7之一例， 因此亦可視爲與習知技術相同。 但是，關於加熱器電阻2b的驅動，在習知技術中， 係成爲在平常時亦以升壓電路部12的升壓電壓進行電力 供給者，但是在本電路中在平常時係對氣體感測器2的加 熱器電阻2b供予電池部1的電壓（電池電壓）。接著， 例如到末期等時，將藉由升壓電路部12所被升壓的電壓 (VDD )供予至加熱器電阻2b。其中，上述“供予”並不 一定意指電池電壓或升壓電壓（VDD )直接照原樣被施加 至加熱器電阻2b，在第1圖之例中係電池電壓或VDD藉 由定電壓電路部6而被降壓而成爲2.0V等，該2.0V等被 施加至加熱器電阻2 b。 爲實現上述情形，重新設置上述開關SW4之構成， 並且藉由控制電路部1 1，來執行後述之第2圖（a)、（b)、 -14 - .201250632 第4圖（a)、（b)〜第7圖（a)、（b)等流程圖的處理β 亦即’首先，在本電路中’以對氣體感測器2的加熱 器電阻2b的電力供給路徑而言’構成：將藉由升壓電路 部12所致之升壓電壓（VDD)透過開關SW1而供予至加 熱器電阻2b的路徑；及將電池部1的電池電壓透過開關 SW4而供予至加熱器電阻2b的路徑的2個電力供給路。 接著’與習知技術中所述之控制電路部3的動作同樣 地’在控制電路部1 1中亦每隔一定周期，以一定時間（ 例如以第3圖所示之時序）驅動氣體感測器2，該感測器 驅動時，將開關SW1與開關SW4的任一方進行ON控制 ’以上述2個路徑的任一方路徑對第1定電壓電路部6進 行電力供給，以大略2V來使氣體感測器2的加熱器電阻 2b驅動。 其中’在將開關SW1、SW4的任一者進彳了 ON時，亦 使開關SW2以相同時序進行ON控制。其中，對開關 SW2的ON / OFF控制係與習知的控制電路部3相同。此 外，關於氣體感測器2的感測器電阻2a，係與習知的控 制電路部3同樣地對開關SW3進行ON/ OFF控制，關於 此並未特別說明。 此外，其中，如圖所示，開關SW1、SW4爲pnp型 電晶體，開關S W2、SW3爲npn型電晶體。 第2圖（a)、（b)係控制電路部1 1中的感測器驅動流程 圖（其1 )。 第2圖（a)係感測器驅動開始時’第2圖（b)係感測器 -15- 201250632 驅動結束時的流程圖。如第3圖所示’每隔預定的感測器 驅動周期T1 (以一例而言，爲20〜60秒的範圍內的値； 在此設爲60秒），即以預定的感測器驅動時間T2 (在此 爲1 00ms )的期間驅動氣體感測器2。 第2圖（a)的處理係按每個上述感測器驅動周期T1來 執行者，在感測器驅動時間T2 ( 100ms)的瞬前被執行。 另一方面，第2圖（b)的處理係在感測器驅動時間T2 ( 100ms)的瞬後被執行。 首先，由第2圖（b)的處理進行說明。 該處理係等待至上述感測器驅動時間T2 ( 100ms )的 感測器驅動結束爲止（反覆步驟S5，NO )，若感測器驅 動一結束（步驟S5，YES)，先根據對上述輸入端子AD1 的輸入，進行電池部1的輸出電壓（電池電壓：電源電壓 )的測定（步驟S6 )。接著，判定該電池電壓是否爲未 達預先設定的預定臨限値（預定値）（步驟S7)。 其中，該預定値係未達電池部1的輸出電壓（3V) ，預先任意設定比本電路未正常動作的電壓（例如2.2V )爲更高的電壓値。例如，如習知技術的課題中所述，例 如以一例而言，若電池部1的電壓未達2 · 2 V，即使進行 上述“截波器控制”’亦使第1定電壓電路部6的輸出變得 無法維持2.0V，而變得無法正常動作。 接著’若電池部1的輸出電壓爲未達上述預定臨限値 (電池電壓 < 預定値）（步驟S7，YES )，判定爲「藉由 感測器驅動所致之電池電壓降低成立」（步驟s 8 )。接 -16- 201250632 著，保持該判定結果。例如’預先準備表示電池電壓降低 成立/不成立的旗標’伴隨步驟S8的執行而將該旗標進 行ON。接著，結束本處理。 其中，藉由未圖示的其他處理，隨時參照旗標，在旗 標ON時，進行電池電壓降低的警告（通知）。此係例如 控制警報部4，藉由表示電壓降低的聲音訊息或LED的亮 燈/滅燈模式（預先任意決定）來進行通知。 另一方面，若電池部1的輸出電壓爲上述預定的臨限 値以上（電池電壓2預定値）（步驟S7，NO)，未進行 步驟S8的處理，即結束本處理。因此，此時例如上述旗 標係成爲保持OFF狀態。 在上述第2圖（b)的處理結束後、下一個感測器驅動 時間T2的開始瞬前等，執行第2圖（a)的處理》 如上所述第2圖（a)的處理係按每個感測器驅動周期 T1來進行執行者。因此，首先判定是否已由前次感測器 驅動時經過感測器驅動周期T 1，亦即是否已成爲感測器 驅動開始時序。至感測器驅動開始時序爲止，係反覆步驟 S1的判定NO，若成爲感測器驅動開始時序（步驟S1， YES )，即判定是否爲電池電壓降低中（步驟S2 )。此係 例如參照上述旗標，若爲旗標ON，即判定爲電池電壓降 低中（步驟S2，YES)» 接著，若判定出非爲電池電壓降低中時（例如旗標爲 OFF時）（步驟S2，NO)，藉由電池部1(電源電壓） 使加熱器電阻2b驅動（步驟S3 )。亦即，將開關SW4 -17- 201250632 在上述感測器驅動時間Τ2 ( 1 00ms )的期間進行ON控制 。換言之，在上述感測器驅動時間T2的期間，對開關 SW4進行ON控制而對加熱器電阻2b供予電池電壓。其 中，雖未逐一詳述，但是關於開關SW2、SW3，亦與習知 技術同樣地，在上述感測器驅動時間T2 ( 1 00ms )的期間 進行ON控制。 另一方面，若判定爲電池電壓降低中時（例如爲旗標 ON時）（步驟S2，YES)，利用電源電壓藉由升壓電路 部12而被升壓的升壓電壓，來使加熱器電阻2b驅動（步 驟S4 )。亦即，將開關SW1在上述感測器驅動時間T2 ( 1 00ms )的期間進行ON控制。換言之，上述感測器驅動 時間T2的期間，將開關SW 1進行ON控制而將升壓電壓 VDD供予至加熱器電阻2b。當然，關於開關SW2、SW3 ，亦與習知技術同樣地，在上述感測器驅動時間T2 ( 100ms )的期間進行ON控制。 在第3圖中顯示藉由上述第2圖的處理所得之感測器 驅動的時序圖。 如圖所示，以預定的感測器驅動周期T1驅動氣體感 測器2，該感測器驅動時間T2在此係設爲100ms。接著 ，在該感測器驅動時間T2的最後，進行上述步驟S6、S7 的處理。亦即，讚取電池部1的電源電壓，檢查該電池電 壓値是否未達預定値。 若電池電壓値爲預定値以上，則視爲正常（第3圖所 示之第1次感測器驅動時），而不進行步驟S8的處理。 -18- 201250632 由此，在第3圖所示之第2次感測器驅動時，由於 S2的判定爲NO，因此以電池電壓進行感測器驅動。 另一方面，若電池電壓値未達預定値，則視爲電 壓降低（異常），執行（第3圖所示之第2次感測器 時）步驟S8的處理。由此，在第3圖所示之第3次 器驅動時，步驟S2的判定係成爲YES，因此以升壓 部12的輸出電壓（升壓電壓VDD)進行感測器驅動 其中，執行步驟S4的處理時，之後亦可不執行 圖（b)的處理。藉此，旗標係維持ON狀態，步驟S2 定必定成爲YES，而持續執行步驟S4的處理。若成 池使用末期而電池電壓降低一定程度以上，則切換成 上述升壓電壓（VDD )所致之感測器驅動，之後係至 停止爲止，始終形成爲藉由升壓電壓（VDD )所爲之 器驅動。亦即，並不執行不必要的判定處理（第2 的處理）。 但是，不限於此例，即使爲執行步驟S 4的處理 形下，之後亦可執行第2圖（b)的處理。由於有因某 因而電池電壓暫時性異常降低的可能性，因此此時亦 所述，可避免在成爲末期前誤切換成藉由升壓電壓（ )所致之感測器驅動的情況。 但是，此時（設爲變形例1 )，以稍微改變第2 的處理爲宜。 第4圖（a)、（b)係變形例1之控制電路部1 1中的 器驅動流程圖。第4圖（a)係感測器驅動開始時，第 步驟 池電 驅動 感測 電路 〇 第2 的判 爲電 藉由 功能 感測 圖（b) 的情 些原 如上 VDD 圖（b) 感測 4圖 -19- 201250632 (b)係感測器驅動結束時的流程圖。 在此，在第4圖（a)、（b)中，對於與第2圖（a)、（b)大 致相同的處理係標註相同的步驟編號，且省略其說明。由 此，如圖所示，第4圖（a)的處理係與第2圖（a)相同，且 省略其說明。此外，如圖所示，第4圖（b)的處理係與第2 圖（b)大致相同，不同之處僅在於追加步驟S9的處理。 亦即，若爲第2圖（b)的情形，一旦執行步驟S8的處 理之後，即使在步驟S7中成爲NO的判定，亦使上述旗 標不會成爲OFF，因此結果，步驟S 2的判定係持續成爲 YES (成爲不具執行第2圖（b)的處理的涵義。因此，如上 所述，亦可不執行第2圖（b)的處理。由此，雖未圖示， 亦可在例如步驟S 4的處理瞬後，執行後述步驟S 1 1的處 理）。藉此減輕處理負荷，因而達成抑制消耗電力，亦可 得電池壽命延長的效果。 相對於此，在第4圖（b)中係在步驟S7的判定爲NO 時執行步驟S9的處理。亦即，判定爲「藉由感測器驅動 所致之電池電壓降低不成立」（步驟S9)。接著，保持 該判定結果。此係例如將表示上述電池電壓降低成立/不 成立的旗標進行OFF者。 藉由上述第4圖（a)、（b)的處理，若因某些原因而電 池電壓暫時性異常降低時，電壓降低中係步驟S7爲YES 而執行步驟S8，藉此步驟S2成爲YES，而進行藉由升壓 電壓（VDD )所致之感測器驅動。換言之，感測器部（包 含加熱器電阻2b )驅動時，藉由將開關SW〗進行ON控 -20- 201250632 制，將藉由升壓電路部丨2所被升壓的電壓（VDD)供予 至感測器部（加熱器電阻2b等）。 但是’由於爲暫時性異常，因此電池電壓恢復成正常 狀態時，步驟S7爲NO而執行步驟S9(旗標OFF等）。 藉此，步驟S2成爲NO’返回至藉由電池電壓所致之感測 器驅動狀態（平常狀態）。平常狀態意指在感測器部（包 括加熱器電阻2b )驅動時將開關SW4進行ON控制，藉 此將電池電壓供予至感測器部（加熱器電阻2b等）的狀 態。 接著，若成爲末期，即持續步驟S7爲YES而執行步 驟S8的狀態。因此，持續步驟S2成爲YES的狀態，因 而持續進行藉由升壓電壓（VDD )所致之感測器驅動的狀 態，基本上並不會返回至藉由電池電壓所致之感測器驅動 狀態。 在電池式警報器中，雖然會有因某些原因而電池電壓 暫時性異常降低的可能性，但是藉由上述變形例1的構成 ，即使因該異常降低而在成爲末期之前發生切換成藉由升 壓電壓（VDD )所致之感測器驅動的情況，其亦爲暫時性 即結束，而再次返回至藉由電池電壓所致之感測器驅動狀 態。 以上說明屬於變形例之一的變形例1。以下亦說明其 他變形例。 首先，以下說明變形例2。 在上述變形例1中，雖說爲暫時性，但即使爲在成爲 -21 - 201250632 末期之前’亦會有切換成藉由升壓電壓（VDD )所致之感 測器驅動的情形。相對於此，在變形例2中，即使爲因某 些原因而電池電壓暫時性異常降低的情形下，亦可避免在 成爲末期之前誤切換成藉由升壓電壓（VDD)所致之感測 器驅動的情況。 第5圖（a)、（b)係變形例2之控制電路部1 1中的感測 器驅動流程圖。第5圖（a)係感測器驅動開始時，第5圖 (b)係感測器驅動結束時的流程圖。 在此’在第5圖（a)、（b)中，對與第2圖（a)、（b)大致 相同的處理標註相同的步驟編號，且省略其說明。由此， 如圖所示，第5圖（a)的處理係與第2圖（a)相同，且省略 其說明。此外，如圖所示，第5圖（b)的處理係與第2圖 (b)大致相同，不同之處僅在於追加步驟S10的處理》 亦即，在第5圖（b)的處理中，係在步驟S7與步驟S8 之間追加步驟S 1 0的處理。即使在步驟S7爲YES的情形 下，亦並非立即進行步驟S8的處理，而僅在步驟S10的 判定中爲YES的情形下進行步驟S8的處理。在步驟S10 中係判定在步驟S7中的YES的判定是否連續預先設定的 預定次數（N次；N若爲2以上之整數，可爲任意數，任 意決定即可）以上（步驟S10) »201250632 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to, for example, fire alarms, gas dampers, and more particularly to battery type alarms. [Prior Art] Conventionally, for example, as shown in Patent Document 1, in the example, the type of the battery type naturally reaches the service life if it is used for a long period of time. That is, the battery voltage will decrease at the end of the use period, even when placed as it is. Therefore, in the residential fire alarm system, the voltage of the battery that is regarded as the power source is lowered, and when the voltage of the battery voltage is stopped, the replacement battery is notified (or the warning period comes). Next, in the invention of Patent Document 1, there is proposed a method of setting a battery voltage in which a battery voltage is lowered in a subtle battery voltage that is completed in a period, and a battery type alarm device is also an example. Reporters, etc., are not limited to the above fire alarms. Among them, the type of the leak alarm 'there are many AC100Vs that are obtained by using a plug or the like (of course, it is internally converted into a DC power source for operation), but recently, a battery-type gas leakage alarm diagram of the prior art has been developed. The gas leakage alarm of the example has an electric leakage alarm, etc., and any battery in the case of a fire alarm, the function is stopped after being used as a power source: the constant monitoring is close to the entire function of the functional device, even if it is used. Cheaply monitors, for example, a gas leak alarm, a gas discharge I commercial power supply (DC5V, etc., a battery type circuit diagram. Pool 1, gas -5 - 201250632 sensor 2, control circuit 3, general report 4 The ambient temperature detecting unit 5, the constant voltage circuit unit 6, the fixed circuit circuit unit 7, the three switches SW1, SW2, SW3, and the load resistor R1. Among them, swi, SW2, and SW3 are semiconductor switching such as bipolar transistors. The element is controlled by ON/OFF by the control circuit unit 3. Further, the gas sensor 2 is composed of a sensor resistor 2a and a heater resistor 2b. The road portion 6 is referred to as a first constant voltage circuit portion 6, and the constant voltage circuit portion 7 is referred to as a second constant voltage circuit portion 7, and will be described in terms of easy distinction between the two. First, the use of the above-described gas sensor 2 will be described. The gas is detected by the detector resistor 2a and the heater resistor 2b. For example, the sensor resistor 2a is a high resistance of 100 Ω, and the heater resistor 2b is a low resistance of about 100 Ω. The resistor 2b is heated to the operating temperature (about 400 ° C) of the sensor resistor 2a as the gas detecting element. Therefore, a large current flows through the heater resistor 2b, and the amount of power consumption is large. The control circuit unit 3 measures by the measurement. The resistance 値 of the sensor resistor 2 a heated to the operating temperature as described above can be used to determine the presence or absence of a gas. The 'measurement/determination method is generally well known, and is not particularly described herein. Since the time taken for the operating temperature is affected by the ambient temperature, the processing of determining the driving time of the heater resistor 2b based on the ambient temperature detected by the ambient temperature detecting unit 5 is also performed. In the case of the sensor resistor 2a, a series circuit composed of the sensor resistor 2a, the load -6 - 201250632 resistor R1, and the switch SW3 is formed. The heater is formed with a switch SW1 and a first constant voltage circuit portion. 6. A series circuit formed by heating 2b and switch SW2. The two circuits are connected in parallel and applied by a second constant voltage circuit unit 7 (for example, a predetermined voltage (for example, 3.3 V) for boosting electricity. 1 applies a voltage (for example, 2.0 V) due to the first constant voltage circuit unit 6 (step-down circuit). Here, the control circuit unit 3 is a microcomputer or the like, and performs a predetermined application pre-stored in its internal memory. Program to control the gas vent. With a part of this control, the process of fixing the sensor 値 of the circumferential gas sensor 2 is performed. This is applied to the gas sensor 2 during a period of, for example, 60 seconds in the range of about 1 〇 〇 m s. This is every 60 seconds, and the switches SW1, SW2, and SW3 are all ON-controlled during the 100-ms period (ON signals are output from the terminals OUT1, OUT2, and OUT3 shown). The sensor resistor 2a is supplied with the above-mentioned 3.3V voltage by the second constant voltage circuit, and the heater resistor 2b is supplied with the above-mentioned 2.0V voltage caused by the constant voltage circuit unit 6. This causes the detector 2 to operate. The control circuit unit 3 receives the voltage 値 of the resistance 値 of the detector resistor 2a input from the input terminal AD2 shown in the figure, and performs gas leakage determination processing based thereon. Next, when it is determined that there is a gas leak, the alarm unit 4 performs control and performs an alarm/notification. The alarm unit 4 includes an alarm resistor 2b belonging to a buzzer or the like, and a resistor circuit 2b. The resistor 2b is predetermined to store a leak. The alarm period is measured. The source is supplied with three outputs. The sense output is predetermined, and is a sound output 201250632 part 4a, a report display part 4b belonging to an LED or the like, an external report output unit 4c belonging to an interface for externally outputting a signal, and the like. The control circuit unit 3 controls these, for example, to emit a buzzer sound or to turn the LED on/off, thereby notifying that a gas leak has occurred. Here, the battery unit 1 is a main power source of the gas leak detector, and in this example, a power source of a voltage of 3.0V. The power supply voltage (3.0 V) is supplied to the control circuit unit 3, the gas sensor 2, and the like which are boosted (in the case where the voltage is stepped down) by the second constant voltage circuit unit 7. This is assumed to be boosted to 3.3V. Further, the first constant voltage circuit unit 6 steps down the output voltage of the second constant voltage circuit unit 7 (here, 3.3 V as described above) to a step-down circuit of, for example, 2.0 V, and the voltage after the step-down (2.0). V) becomes the driving voltage of the heater resistor 2b. In other words, after the boosting of the heater resistor 2b is performed by the second constant voltage circuit unit 7, the voltage is reduced by the first constant voltage circuit unit 6 (3.0 V - 3.3 V - 2.0 V). The first constant voltage circuit unit 6 and the second constant voltage circuit unit 7 generate a double loss, and the efficiency is extremely poor, and a battery current is often used. Among them, the heater resistor 2b is a component having a very large power consumption, and the power consumption of the control circuit unit 3 or the sensor resistor 2a is small as compared with the heater resistor 2b. Further, the first constant voltage circuit unit 6 is a DC-DC converter such as a step-down chopper. Further, the second constant voltage circuit unit 7 is also a DC-DC converter such as a boost chopper or a buck chopper. Further, although not shown, there is a conventional example of 201250632 in which the second constant voltage circuit unit 7 does not exist. At this time, at the end of the battery use, if the battery voltage is lowered, in particular, based on the problem of the driving voltage of the heater resistor 2b, the battery cannot operate normally. That is, in the case of this example, the power source voltage (the voltage of the battery unit 1 is 3.0 V) is supplied to the gas sensor 2 or the control circuit unit 3, and the first constant voltage circuit unit 6 supplies the power source voltage ( 3V) step down to the above 2.0V. When the voltage of the battery unit 1 is lowered at the end of the battery use, the output voltage of the first constant voltage circuit unit 6 is also lowered, and the driving voltage of the heater resistor 2b is lowered. When the battery voltage is lowered as described above, the driving voltage of the heater resistor 2b is lowered, and it is impossible to heat up to the above operating temperature. Therefore, the above-described "resistance 値 of the sensor resistance 2a in the state of heating up to the operating temperature" cannot be performed, and the normal measurement cannot be performed, and normal gas leakage determination cannot be performed. That is, the normal operation is not possible, and as shown in the conventional example shown in Fig. 8, if there is the second constant voltage circuit unit 7 (boost chopper), there is no boost chopping as described above. Compared with the configuration of the device, even if the battery voltage is lowered at the end of the battery use, it can operate normally for a long time. However, as described above, in the normal case, since the boost chopper and the step-down chopper are double-discharged, the battery current is used in a large amount, and as a result, the possibility that the life is shortened is high. [Patent Document 1] Japanese Patent Laid-Open Publication No. 2000-2012 No. 2, 2012-2012. [0002] Here, the gas leak detector is usually used for 5 years without maintenance. Therefore, even in the battery type gas leak detector, it is necessary to replace the battery and use it for 5 years. If the number of batteries is sufficient for the device, it can fully satisfy the 5-year service period, but the product cost or product shape/ In terms of product weight and the like, it is also expected to reduce the number of batteries to be loaded, and it is necessary to reduce the power consumption of the machine, and to satisfy the five-year use period with a small number of batteries. In order to meet the market requirements as described above, it is preferable to perform normal operation as long as possible even at the end of the battery use, but as described above, if the power consumption is large in the usual time, the result cannot be changed as the life of the detector. The possibility of being long is extremely high. Among them, the above Patent Document 1 does not consider any requirement relating to the above. In the above-described conventional configuration, for example, when the first constant voltage circuit unit 6 is a step-down chopper or the like, and the control circuit unit 3 performs so-called "chopper control" by a control signal from the output terminal OUT3, The duty ratio of the "chopper control" can be changed according to the voltage drop of the battery unit 1, and the driving voltage of the heater resistor 2b can be maintained at a predetermined threshold (2.0 V), but there is a limit here. For example, when the voltage of the battery unit 1 is less than 2.2 V, the output of the first voltage circuit unit 6 is less than 2.0 V, and the operation cannot be performed normally. SUMMARY OF THE INVENTION The object of the present invention is to provide a battery-type detector, in particular, -10-201250632, relating to the structure of the sensor drive, which can reduce the loss of battery consumption, and can extend the time of normal operation at the end of battery use. Therefore, a battery type alarm device or the like which can extend the life of the alarm can be realized. The battery type alarm device of the present invention has the following configuration on the premise of a battery type alarm device having at least a sensor portion and a battery. First, there is a booster circuit unit that boosts the battery voltage. Further, the first power supply path for supplying the battery voltage to the sensor unit; and the first switching means provided on the first power supply path. Further, the present invention includes a second power supply path for supplying a voltage boosted by the booster circuit unit to the sensor unit, and a second switching means provided on the second power supply path. Further, there is provided a control means for performing the ΟΝ / Ο F F control of the first switching means and the second switching means. Next, the control means monitors the battery voltage, and when the battery voltage is equal to or greater than a predetermined threshold ,, when the sensor unit is driven, the first switching means is turned ON to control the battery voltage. It is supplied to the aforementioned sensor section. Further, when the battery voltage is less than a predetermined threshold ,, when the sensor unit is driven, the second switching means is controlled to be turned on by the booster circuit unit. The voltage is supplied to the aforementioned sensor section. If the battery voltage is not at the predetermined threshold after the battery is used, the battery voltage will be insufficient with respect to the sensor drive. Therefore, by using the boosted voltage, the battery can be extended at the end of the battery. -11 - 201250632 The time of the work. Further, when the battery is used as described above, it is normal to use the battery voltage to reduce the loss of battery consumption. Therefore, the life of the battery type radiographer can be extended. The battery type detector is, for example, a gas leak detector. In this case, the sensor portion is, for example, a heater resistor in the gas sensor, and a step-down circuit connected in series with the heater resistor, and the step-down circuit is configured to apply the battery voltage or the boosted voltage. The step-down is performed, and the heater resistance is driven by the voltage after the step-down. In the case of this example, by driving the sensor unit by the voltage boosted by the booster circuit unit, the battery voltage is boosted by the booster circuit unit, and the voltage is stepped down by the step-down circuit. Formed as a double loss. On the other hand, as described above, the battery consumption can be reduced by using the battery voltage. [Kappa Mode] Hereinafter, embodiments of the present invention will be described with reference to the drawings. A circuit diagram of the battery type gas leak detector of this example is shown in Fig. 1. Here, this is a configuration example in which the circuit configuration of the conventional gas detector of the present embodiment is easily compared with the circuit diagram of the conventional gas leakage gas detector shown in FIG. example. In addition, it can be applied to other detectors such as fire detectors, not limited to gas leak alarms. However, of course, it is limited to a battery type detector. Among the various components of the circuit of the battery type gas leakage detector 10 of the present example shown in Fig. 1, the components of the circuit of the circuit of the prior art shown in Fig. 8 are substantially the same. The same component symbols are denoted and their description or simplification is omitted. In Fig. 1, the battery unit 1 is the same as the prior art, and the main power source of the gas leak alarm 10 is also a power source of 3 V in this example. Further, the gas sensor 2 has the same configuration as that of the prior art, and has a sensor resistance 2a and a heater resistor 2b. Further, regarding the sensor resistance 2a, the configuration in which the load resistor R1 and the switch SW3 are connected in series is also the same as the prior art. Similarly, the configuration of the series connection switch SW1, the first constant voltage circuit unit 6, and the switch SW2 with respect to the heater resistor 2b is also the same as that of the prior art. In addition, the alarm sound output unit 4a belonging to a buzzer or the like, the alarm display unit 4b belonging to an LED or the like, the alarm unit 4 including an external alarm output unit 4c for interfacing the external signal, and the like The control process of the control circuit unit 11 of the alarm unit 4 can be the same as the prior art. The control processing of the ambient temperature detecting unit 5 and the corresponding ambient temperature may be the same as the conventional technique. However, the control circuit unit 11 performs substantially the same processing as the above-described control circuit unit 3, but also performs the second (a), (b), and fourth (a), (b), and fifth aspects described later. Processing of processes such as (a), (b), 6 (a), (b), and 7 (a) and (b). In this case, the processing of the one or more processes is performed. The control circuit unit 11 is a microcomputer or the like, and a predetermined application stored in the built-in memory in advance is executed by the CPU or the like, thereby achieving substantially the same processing as the above-described conventional technology. Or the processing of the flow of the second diagrams (a), (b), 4 (a), -13-201250632 (b) to 7 (a), (b), and the like. Further, the input/output terminals of the control circuit unit 11 are substantially the same as those of the above-described control circuit unit 3, and the same reference numerals are used, and the conventional output terminal OUT2 and the input terminal AD1 are provided. . The illustrated switch SW4 is turned ON/OFF by the ΟΝ/OFF output from the output terminal OUT2. Further, the input terminal AD 1 is connected to the battery unit 1, and the control circuit unit 11 monitors the voltage (power supply voltage) of the battery unit 1. Here, in the present circuit, the booster circuit unit 12 is provided instead of the second constant voltage circuit unit 7 in the conventional circuit of Fig. 8. However, in the prior art, the booster circuit is also exemplified as the second constant voltage circuit unit 7, and thus can be considered to be the same as the prior art. However, in the conventional technique, the heater resistor 2b is driven by the boosted voltage of the booster circuit unit 12, but in the present circuit, the gas is sensed in the ordinary circuit. The heater resistor 2b of the device 2 supplies the voltage (battery voltage) of the battery unit 1. Next, for example, at the end or the like, the voltage (VDD) boosted by the booster circuit unit 12 is supplied to the heater resistor 2b. The above "supply" does not necessarily mean that the battery voltage or the boost voltage (VDD) is directly applied to the heater resistor 2b as it is. In the example of Fig. 1, the battery voltage or VDD is supplied by the constant voltage circuit unit. 6 is stepped down to become 2.0 V or the like, and the 2.0 V or the like is applied to the heater resistor 2 b. In order to achieve the above, the configuration of the switch SW4 is reset, and the second circuit (a), (b), -14 - .201250632, Fig. 4 (a), (hereinafter), which will be described later, is executed by the control circuit unit 11. b) to the processing of the flowcharts of (a), (b), and the like, that is, 'first, in this circuit', the power supply path to the heater resistor 2b of the gas sensor 2 constitutes: The boosted voltage (VDD) by the booster circuit unit 12 is supplied to the heater resistor 2b through the switch SW1; and the battery voltage of the battery unit 1 is supplied to the heater resistor 2b through the switch SW4. 2 power supply paths for the path. Then, in the same manner as the operation of the control circuit unit 3 described in the prior art, the gas sensing is driven for a predetermined period of time (for example, at the timing shown in FIG. 3) at regular intervals in the control circuit unit 11. When the sensor is driven, the switch SW1 and the switch SW4 are controlled to be ON. The power is supplied to the first constant voltage circuit unit 6 in one of the two paths, and the gas is made substantially 2V. The heater resistor 2b of the sensor 2 is driven. When the switch SW1 and SW4 are turned ON, the switch SW2 is also ON-controlled at the same timing. The ON/OFF control of the switch SW2 is the same as that of the conventional control circuit unit 3. Further, the sensor resistance 2a of the gas sensor 2 is ON/OFF controlled by the switch SW3 in the same manner as the conventional control circuit unit 3, and is not particularly described. Further, among them, as shown, the switches SW1 and SW4 are pnp type transistors, and the switches S W2 and SW3 are npn type transistors. Fig. 2 (a) and (b) are diagrams (1) of the sensor driving flow in the control circuit unit 1 1. Fig. 2(a) shows the start of the sensor drive. Fig. 2(b) shows the flow chart at the end of the drive -15-201250632. As shown in Fig. 3, 'every predetermined sensor drive period T1 (for example, 値 in the range of 20 to 60 seconds; here, set to 60 seconds), that is, driven by a predetermined sensor The gas sensor 2 is driven during a time T2 (here, 100 ms). The processing of Fig. 2(a) is performed for each of the above-described sensor driving periods T1, and is executed immediately before the sensor driving time T2 (100 ms). On the other hand, the processing of Fig. 2(b) is executed immediately after the sensor driving time T2 (100 ms). First, the processing of Fig. 2(b) will be described. The processing waits until the sensor driving of the sensor driving time T2 (100 ms) ends (repeated step S5, NO), and if the sensor driving is finished (step S5, YES), first according to the input terminal The input of AD1 is used to measure the output voltage (battery voltage: power supply voltage) of the battery unit 1 (step S6). Next, it is determined whether or not the battery voltage is less than a predetermined predetermined threshold (predetermined 値) (step S7). However, the predetermined voltage is less than the output voltage (3 V) of the battery unit 1, and a voltage 値 higher than a voltage (for example, 2.2 V) in which the circuit is not normally operated is arbitrarily set in advance. For example, as described in the subject of the prior art, for example, if the voltage of the battery unit 1 is less than 2 · 2 V, the first constant voltage circuit unit 6 is caused even if the "chopper control" is performed. The output becomes unable to maintain 2.0V and becomes unable to operate normally. Then, 'If the output voltage of the battery unit 1 is less than the predetermined threshold 电池 (battery voltage < predetermined 値) (YES in step S7), it is determined that "the battery voltage drop caused by the sensor drive is established" ( Step s 8). From -16 to 201250632, keep the judgment result. For example, 'flags indicating that the battery voltage drop is established/not established' are prepared in advance, and the flag is turned on in accordance with the execution of step S8. Then, the process ends. In addition, the flag is referred to at any time by other processing (not shown), and when the flag is turned on, a warning (notification) of the battery voltage reduction is performed. For example, the control alarm unit 4 performs notification by an audio message indicating a voltage drop or a light-on/off mode of the LED (arbitrarily determined in advance). On the other hand, if the output voltage of the battery unit 1 is equal to or higher than the predetermined threshold ( (the battery voltage 2 is predetermined) (NO in step S7), the processing in step S8 is not performed, that is, the present processing is terminated. Therefore, at this time, for example, the above flag system is kept in the OFF state. After the processing of the second drawing (b) is completed, the processing of the second drawing (a) is executed immediately before the start of the next sensor driving time T2, etc. The processing of the second drawing (a) is as described above. Each sensor drives the period T1 to perform the performer. Therefore, it is first determined whether or not the sensor drive period T1 has elapsed since being driven by the previous sensor, that is, whether it has become the sensor drive start timing. When the sensor drive start timing is reached, the determination NO in step S1 is repeated, and if it is the sensor drive start timing (YES in step S1), it is determined whether or not the battery voltage is decreasing (step S2). For example, referring to the above flag, if the flag is ON, it is determined that the battery voltage is decreasing (step S2, YES). » Next, if it is determined that the battery voltage is not decreasing (for example, when the flag is OFF) (step) S2, NO), the heater resistor 2b is driven by the battery unit 1 (power supply voltage) (step S3). That is, the switch SW4 -17-201250632 is ON-controlled during the above-described sensor drive time Τ2 (1 00 ms). In other words, during the period of the sensor driving time T2, the switch SW4 is ON-controlled and the battery resistor 2b is supplied with the battery voltage. In the same manner as the prior art, the switches SW2 and SW3 are ON-controlled during the period of the sensor driving time T2 (100 ms). On the other hand, when it is determined that the battery voltage is decreasing (for example, when the flag is ON) (YES in step S2), the boosted voltage boosted by the booster circuit unit 12 by the power supply voltage is used to cause the heater. The resistor 2b is driven (step S4). That is, the switch SW1 is ON-controlled during the above-described sensor driving time T2 (1 00 ms). In other words, during the period in which the sensor is driven for the time T2, the switch SW1 is turned ON and the boosted voltage VDD is supplied to the heater resistor 2b. Of course, similarly to the conventional techniques, the switches SW2 and SW3 are ON-controlled during the period of the sensor drive time T2 (100 ms). The timing chart of the sensor drive obtained by the processing of the above Fig. 2 is shown in Fig. 3. As shown, the gas sensor 2 is driven with a predetermined sensor drive period T1, which is set to 100 ms here. Next, at the end of the sensor driving time T2, the processing of the above steps S6, S7 is performed. That is, the power supply voltage of the battery unit 1 is appreciated, and it is checked whether the battery voltage 未 has not reached the predetermined threshold. If the battery voltage 値 is equal to or greater than the predetermined threshold, it is regarded as normal (when the first sensor is driven as shown in Fig. 3), and the processing of step S8 is not performed. -18-201250632 Thus, at the time of the second sensor driving shown in Fig. 3, since the determination of S2 is NO, the sensor is driven by the battery voltage. On the other hand, if the battery voltage 値 is less than the predetermined threshold, the voltage is considered to be lowered (abnormal), and the processing of step S8 (when the second sensor is shown in Fig. 3) is executed. Therefore, in the third-stage driving operation shown in FIG. 3, the determination in step S2 is YES. Therefore, the sensor is driven by the output voltage (boost voltage VDD) of the boosting unit 12, and step S4 is performed. At the time of the processing, the processing of the diagram (b) may not be performed thereafter. Thereby, the flag is maintained in the ON state, and step S2 is determined to be YES, and the processing of step S4 is continuously performed. If the battery is used at the end of the pool and the battery voltage is reduced by a certain level or more, the sensor drive is switched to the boost voltage (VDD), and then it is stopped until it is stopped, and is always formed by the boost voltage (VDD). The device is driven. That is, unnecessary determination processing (second processing) is not performed. However, the present invention is not limited to this example, and even if the processing of step S4 is performed, the processing of Fig. 2(b) can be performed thereafter. Since there is a possibility that the battery voltage temporarily drops abnormally due to some reason, it is also possible to avoid the case where the sensor is driven by the boosted voltage ( ) by the erroneous switching before the end period. However, at this time (set to Modification 1), it is preferable to slightly change the second processing. Fig. 4 (a) and (b) are flowcharts showing the drive of the control circuit unit 1 in the first modification. Figure 4 (a) is the first step of the first step of the sensor drive circuit when the sensor drive starts. The power is sensed by the function sense map (b). 4 Figure-19- 201250632 (b) Flow chart at the end of sensor drive. Here, in the fourth (a) and (b), the same steps as those in the second (a) and (b) are denoted by the same step numbers, and the description thereof will be omitted. Therefore, as shown in the figure, the processing of Fig. 4(a) is the same as that of Fig. 2(a), and the description thereof is omitted. Further, as shown in the figure, the processing of Fig. 4(b) is substantially the same as that of Fig. 2(b) except that the processing of step S9 is added. In other words, in the case of FIG. 2(b), once the process of step S8 is executed, even if the determination of NO is made in step S7, the flag is not turned off, and as a result, the determination of step S2 is performed. The continuation is YES (there is no need to perform the processing of Fig. 2(b). Therefore, as described above, the processing of Fig. 2(b) may not be performed. Therefore, although not shown, steps may be performed, for example. After the processing of S 4 is instantaneous, the processing of step S 1 1 described later is performed). Thereby, the processing load is reduced, so that the power consumption can be suppressed, and the battery life can be prolonged. On the other hand, in the fourth figure (b), the process of step S9 is executed when the determination in step S7 is NO. That is, it is determined that "the battery voltage drop by the sensor drive is not established" (step S9). Then, the determination result is maintained. For example, the flag indicating that the battery voltage drop is established/not established is turned off. According to the processing of FIGS. 4(a) and 4(b), if the battery voltage temporarily drops abnormally for some reason, the voltage reduction step S7 is YES, and step S8 is executed, whereby step S2 becomes YES. The sensor drive is performed by the boost voltage (VDD). In other words, when the sensor unit (including the heater resistor 2b) is driven, the voltage (VDD) boosted by the booster circuit unit 丨2 is supplied by the ON-control -20-201250632 system. It is supplied to the sensor unit (heater resistor 2b, etc.). However, when the battery voltage returns to the normal state due to a temporary abnormality, step S7 is NO and step S9 (flag OFF or the like) is executed. Thereby, step S2 becomes NO' and returns to the sensor driving state (normal state) by the battery voltage. The normal state means that the switch SW4 is ON-controlled when the sensor section (including the heater resistor 2b) is driven, whereby the battery voltage is supplied to the state of the sensor section (heater resistor 2b, etc.). Next, if it is the final stage, the state of step S8 is executed by continuing step S7 to YES. Therefore, the step S2 is continued to the YES state, and thus the state of the sensor driving by the boosted voltage (VDD) is continuously performed, and substantially does not return to the sensor driving state by the battery voltage. . In the battery type alarm device, there is a possibility that the battery voltage temporarily drops abnormally for some reason. However, according to the configuration of the first modification, even if the abnormality is lowered, switching occurs before the end of the period. In the case of the sensor drive caused by the boost voltage (VDD), it is also temporarily terminated, and returns to the sensor drive state by the battery voltage. The first modification is a modification 1 which is one of the modifications. Other variations are also described below. First, the modification 2 will be described below. In the first modification described above, although it is temporary, even if it is before the end of -21 - 201250632, there is a case where the sensor is driven by the boosted voltage (VDD). On the other hand, in the second modification, even in the case where the battery voltage temporarily deteriorates abnormally for some reason, it is possible to avoid erroneous switching to the sensing by the boosted voltage (VDD) before the end period. Driven case. Fig. 5 (a) and (b) are flowcharts showing the sensor driving in the control circuit unit 1 1 of the second modification. Fig. 5(a) shows the flow chart at the end of the sensor drive when the sensor drive starts, and Fig. 5(b) shows the end of the sensor drive. Here, in the fifth embodiment (a) and (b), the same steps as those in the second embodiment (a) and (b) are denoted by the same step numbers, and the description thereof will be omitted. Therefore, as shown in the figure, the processing of Fig. 5(a) is the same as that of Fig. 2(a), and the description thereof is omitted. Further, as shown in the figure, the processing of Fig. 5(b) is substantially the same as that of Fig. 2(b), except that the processing of step S10 is added, that is, in the processing of Fig. 5(b). The process of step S 10 is added between step S7 and step S8. Even in the case where YES in step S7, the processing of step S8 is not immediately performed, but the processing of step S8 is performed only in the case of YES in the determination of step S10. In step S10, it is determined whether or not the determination of YES in step S7 is continuously set a predetermined number of times (N times; if N is an integer of 2 or more, any number may be arbitrarily determined) (step S10) »
此係使用例如計數器，在每次步驟S 7的判定爲Y E S 時即上數（count up) +1，並且在每次步驟S7的判定爲 NO時即重置‘〇’。接著，在步驟S10中係將計數値與上述 預定次數N作比較，來判定是否爲「計數値^預定次數N -22- 201250632 接著’連續預定的複數次以上而步驟S7爲YES時（ 例如「計數値2預定次數N」時），步驟S 1 0的判定成爲 YES而執行步驟S8的處理。若非爲此時（步驟S10，NO )，並未執行步驟S8的處理，即結束本次之本處理。 在該處理中，由於未存在將旗標進行OFF的處理， 因此一旦在步驟S 8中成爲旗標ON之後，之後始終進行 藉由升壓電壓（VDD )所致之感測器驅動。此係基於連續 上述預定複數次以上而使步驟S7成爲YES時，即視爲電 池使用末期之故。 其中，藉此，一旦成爲旗標ON之後，亦可考慮不必 要執行第5圖（b)(或者甚至連第5圖（a)的處理）的處理 。由此，雖未圖示，但是亦可在例如步驟S4的處理的瞬 後，執行後述步驟S11的處理。藉此減輕處理負荷，因而 達成抑制消耗電力，亦可得電池壽命延長的效果。 接著，以下說明變形例3。 變形例3係對應於上述「執行步驟S4的處理時（換 言之，被檢測出電池電壓成爲未達預定値時），之後係未 執行第2圖（b)的處理」等者。 第6圖（a)、（b)係變形例3的控制電路部1 1中的感測 器驅動流程圖。第6圖（a)係感測器驅動開始時，第6圖 (b)係感測器驅動結束時的流程圖。 在此，在第6圖（a)、（b)中，對於與第2圖（a)、（b)大 致相同的處理係標註相同的步驟編號，且省略其說明。由 -23- 201250632 此’如圖所示，第6圖（b)的處理係與第2圖（b)相同，而 省略其說明。此外，如圖所示，第6圖（a)的處理係與第2 圖U)大致相同，不同之處僅在於追加步驟S11的處理。 亦即，在第6圖（a)中，係藉由電池電壓降低中（旗 標ON )的判定（步驟S2，YES )，藉由升壓電壓VDD而 使加熱器電阻2b驅動（步驟S4 )之後，另外進行移至預 定模式的處理（步驟S 1 1 )。該預定模式係例如上述「未 執行第2圖（b)的處理」（未監視電池電壓）的模式。藉 此，旗標係維持ON狀態，步驟 S2的判定係必定成爲 YES，而持續執行步驟S4的處理。接著，由於未執行第2 圖（b)的處理，因而減輕處理負荷。 但是，不限於此例。以上述預定模式而言，例如預先 準備「第2圖（a)、（b)的處理並未執行，加熱器電阻2b的 驅動係經常藉由升壓電壓進行（感測器驅動時係經常將 SW1進行ON)的模式」，在執行步驟S4時，亦可切換 成該預定模式。此時，不僅第2圖（b)，亦可不執行第2 圖（a)的處理，因此因而更加減輕處理負荷。 但是’在上述變形例3中，並無法對應例如上述因某 些原因而電池電壓暫時性異常降低的情況，在發生如上所 示之異常時’即使在異常狀態解除後，亦藉由升壓電壓使 加熱器電阻2b驅動。 相對於此’雖然亦考慮藉由追加上述步驟S10的處理 來對應，但是在以下變形例4中’藉由進行使用下述第1 臨限値與第2臨限値的2種臨限値的判定來對應。 -24 - 201250632 「第1臨限値」；以未達電池部1的輸出電壓（電池 電壓；3V)，比本電路未正常動作的電壓（例如2.2V) 爲更高的電壓値爲條件，而任意設定者。 「第2臨限値」；以未達上述第1臨限値，比本電路 未正常動作的電壓（例如2.2V )爲更高的電壓値爲條件 ’而任意設定者，例如成爲顯示電池使用末期狀態者。 其中，第1臨限値亦可視爲相當於在上述步驟S7的 判定中所使用的「預定値」，但是不限於此例。 第7圖（a)、（b)係變形例4之控制電路部1 1中的感測 器驅動流程圖。第7圖（a)係感測器驅動開始時，第7圖 (b)係感測器驅動結束時的流程圖。 在此，在第7圖（a)、（b)中，對於與第2圖（a)、（b)大 致相同的處理係標註相同的步驟編號，且省略其說明。由 此’如圖所示’第7圖（a)的處理係在第2圖（a)的處理追 加步驟S23、S24的處理。此外，如圖所示，第7圖（b)的 處理係追加步驟S20來取代第2圖（b)的步驟S7，並且另 外追加步驟S21、S22的處理。 首先，說明第7圖（b)。 在第7圖（b)中，若上述步驟S5的判定爲YES而執行 步驟S6，接著’進行「電池電壓 <第i臨限値？」的判定 (步驟S20) ’來取代如上所述第2圖（b)之步驟S7的厂 電池電壓 < 預定値？」的判定。但是，如上所述，第1臨 限値亦可視爲相當於上述「預定値」，此時，步驟s 2 0亦 可實質上視爲與步驟S 7相同。 -25- 201250632 接著’若電池電壓爲未達第1臨限値時（步驟S20， YES)，進行上述步驟S8的處理，接著，進行「電池電 壓 < 第2臨限値？」的判定（步驟S 2 1 )。若電池電壓爲 第2臨限値以上時（步驟S 2 1，Ν Ο )，則直接結束本處理 。另一方面’若電池電壓爲未達第2臨限値時（步驟S2i 1 YES)，判定爲「末期狀態成立」（步驟S22 )。步驟 S 22的處理’具體而言爲將例如表示「末期狀態成立」的 旗標（稱爲第2旗標者）進行ON者，但是不限於此例。 接著，說明第7圖（a)。 在上述步驟S20的判定成爲YES時之後執行第7圖 (a)的處理時，上述步驟S2的判定係成爲YES而進行上述 步驟S4的處理。接著，接續步驟S4的處理，判定是否爲 末期狀態（步驟S23 )。此係例如參照上述第2旗標，若 第2旗標爲ON，即判定爲末期狀態，若第2旗標爲OFF ，則判定爲非爲末期狀態。 若被判定出非爲末期狀態（步驟S23，NO )，則直接 結束本處理。若被判定出爲末期狀態（步驟S23，YES ) ，則移至預定模式（步驟S24 )。在此，該“預定模式，，亦 可與例如上述步驟S 1 1中的“預定模式”大致相同。亦即， “預定模式”亦可爲例如「未執行第7圖（b)的處理」（未 監視電池電壓）的模式。或者“預定模式”亦可爲「並未執 行第7圖（a)、（b)的處理，加熱器電阻2b的驅動係經常藉 由升壓電壓來進行（驅動時係經常將SW1進行ON )的模 式」。 -26- 201250632 其中，雖在第7圖（b)未顯示，若步驟S20的判定爲 NO時，亦可與第4圖（b)大致相同地，執行上述步驟S9 的處理。藉此，即使例如上述成爲電池電壓的暫時性異常 降低而電池電壓成爲未達第1臨限値，亦只要電池電壓非 爲未達第2臨限値，即使一旦被判定爲「電池電壓降低成 立」而成爲使用升壓電壓的狀態，亦使電池電壓一恢復成 正常狀態即再次返回至使用電池電壓的狀態（平常狀態） 〇 如以上說明所示，在變形例4中，若藉由使用：使用 於電池電壓與升壓電壓之切換的第1臨限値、及使用於判 定是否爲電池使用末期的狀態的第2臨限値，而判斷爲電 池使用末期，則自此之後即成爲未監視電池電壓的狀態。 藉此減輕處理負荷，因而可抑制消耗電力而延長正常動作 的時間（電池壽命）。此外，亦可對應因某些原因而電池 電壓暫時性異常降低的情況。亦即，無關於尙未爲末期， 可避免之後紿終藉由升壓電壓使加熱器電阻2b驅動的情 況。即使藉由升壓電壓暫時性使加熱器電阻2b驅動，亦 可再次返回至藉由電池電壓使加熱器電阻2b驅動的狀態 (平常狀態）。藉此，可避免正常動作的時間變短的情況 〇 其中’當然若以升壓電壓驅動時，與以電池電壓驅動 時相比，消耗電力會變大。 此外’其中’上述「藉由升壓電壓使加熱器電阻2b 驅動」係相當於在感測器部（包括加熱器電阻2b )驅動 -27- 201250632 時，將升壓電壓供予至該感測器部（加熱器電阻2b等） 。同樣地，上述「藉由電池電壓使加熱器電阻2b驅動」 係相當於在感測器部（包括加熱器電阻2b )驅動時，將 電池電壓供予至該感測器部（加熱器電阻2b等）。 如上所述，在本手法中，在上述第1圖的構成中進行 第2圖（a)、（b)、第4圖（a)、（b)〜第7圖（a)、（b)的任何 處理，藉此關於氣體感測器2的驅動，在平常時，係可藉 由供予電池部1的電池電壓來減少電池消耗的損失，在電 池使用末期，係以供予升壓電路的升壓電壓的方式進行切 換，因此可延長正常動作的時間。藉此，可達成簦報器的 長薛命化。此外有助於滿足上述規定》 亦即，如習知技術的課題中所述，關於電池式的笤報 器，規定不容許電池替換（因此若藉命一到即替換普報器 本身）而且可進行5年以上正常動作，藉由本手法來實現 長S命化，係有助於充分滿足該規定。 其中，上述第1圖的構成、第2圖（a)、（b)的處理係 顯示一例，並非侷限於該例。此外，本手法之適用對象亦 可爲例如火災普報器等，而非侷限於氣體洩漏昝報器。 藉由本發明之電池式警報器等，關於電池式的瞢報器 ，尤其關於有關感測器驅動的構成，可減少電池消耗的損 失，而且，在電池使用末期，可延長可正常動作的時間， 因而可實現啓報器的長爵命化。 【圖式簡單說明】 -28- 201250632 第1圖係本例之電池式的氣體洩漏警報器的電路圖。 第2圖（a)、（b)係藉由控制電路部所致之感測器驅動 的處理流程圖（其1 )。 第3圖係感測器驅動的時間圖。 第4圖（a)、（b)係藉由控制電路部所致之感測器驅動 的處理流程圖（其2)。 第5圖（a)、（b)係藉由控制電路部所致之感測器驅動 的處理流程圖（其3)。 - 第6圖（a)、（b)係藉由控制電路部所致之感測器驅動 的處理流程圖（其4 )。 第7圖（a)、（b)係藉由控制電路部所致之感測器驅動 的處理流程圖（其5)。 第8圖係習知的電池式的氣體洩漏警報器的電路圖。 【主要元件符號說明】 1 :電池部 2 :氣體感測器 2a :感測器電阻 2b :加熱器電阻 3 :控制電路部 4 :警報部 4a :警報聲輸出部 4b :警報顯示部 4c :外部警報輸出部 -29- 201250632 5 :周圍溫度檢測部 6:第1定電壓電路部 7:第2定電壓電路部 10:氣體洩漏啓報器 1 1 :控制電路部 1 2 :升壓電路部 AD 1、AD2 ' AD3 :輸入端子 OUT5 :輸出端子 OUT1、OUT2、OUT3、OUT4、 R1 :負荷電阻 SW1〜SW4:開關 VDD :升壓電壓 -30-This uses, for example, a counter, which counts up +1 every time the decision of step S7 is Y E S , and resets '〇' every time the decision of step S7 is NO. Next, in step S10, the count 値 is compared with the predetermined number of times N to determine whether it is "counting 预定 ^ predetermined number of times N -22 - 201250632 and then 'continuously predetermined plural times or more and step S7 is YES (for example, " When the count 値2 is a predetermined number of times N", the determination of step S10 is YES, and the processing of step S8 is executed. If it is not at this time (NO in step S10), the processing of step S8 is not executed, that is, the present processing is ended. In this processing, since there is no processing for turning off the flag, once the flag is turned ON in step S8, the sensor driving by the boosted voltage (VDD) is always performed thereafter. If the step S7 is YES based on the above predetermined plurality of times or more, it is regarded as the end of the battery use. In this case, it is also possible to perform the processing of Fig. 5(b) (or even the processing of Fig. 5(a)) once the flag is turned ON. Therefore, although not shown, the processing of step S11 described later may be executed immediately after the processing of step S4, for example. By reducing the processing load, the power consumption can be suppressed, and the battery life can be prolonged. Next, a modification 3 will be described below. The third modification corresponds to the above-mentioned "when the process of step S4 is executed (in other words, when the battery voltage is detected to be less than the predetermined time), and then the process of FIG. 2(b) is not executed. Fig. 6 (a) and (b) are flowcharts showing the sensor driving in the control circuit unit 1 1 of the third modification. Fig. 6(a) shows the flow chart at the end of the sensor drive when the sensor drive starts, and Fig. 6(b) shows the end of the sensor drive. Here, in FIGS. 6(a) and 6(b), the same steps as those in FIGS. 2(a) and 2(b) are denoted by the same step numbers, and the description thereof will be omitted. As shown in Fig. -23-201250632, the processing of Fig. 6(b) is the same as that of Fig. 2(b), and the description thereof is omitted. Further, as shown in the figure, the processing of Fig. 6(a) is substantially the same as that of Fig. 2(i), except that the processing of step S11 is added. That is, in Fig. 6(a), the heater resistance 2b is driven by the boost voltage VDD by the determination of the battery voltage drop (flag ON) (step S2, YES) (step S4) Thereafter, the process of moving to the predetermined mode is additionally performed (step S1 1 ). This predetermined mode is, for example, the above-described mode in which "the processing of Fig. 2 (b) is not performed" (the battery voltage is not monitored). By this, the flag is maintained in the ON state, and the determination in the step S2 is always YES, and the processing of the step S4 is continuously performed. Then, since the processing of FIG. 2(b) is not performed, the processing load is reduced. However, it is not limited to this example. In the predetermined mode described above, for example, the processing of "the second drawing (a) and (b) is not performed in advance, and the driving system of the heater resistor 2b is often performed by the boosting voltage (the sensor is often driven when the sensor is driven) The mode in which SW1 is ON) may be switched to the predetermined mode when step S4 is executed. At this time, not only the processing of FIG. 2(a) but also the processing of FIG. 2(a) is not performed, so that the processing load is further reduced. However, in the above-described Modification 3, for example, the battery voltage transient abnormality may not be lowered for some reasons, and when the abnormality as described above occurs, the boost voltage is applied even after the abnormal state is released. The heater resistor 2b is driven. In contrast to this, it is considered that the processing of the above-described step S10 is added. However, in the following Modification 4, the two types of thresholds using the first threshold and the second threshold are used. The decision is made to correspond. -24 - 201250632 "1st threshold"; the output voltage (battery voltage; 3V) of the battery unit 1 is lower than the voltage (for example, 2.2V) that is not operating normally in this circuit. And any setter. "2nd threshold"; if the voltage is lower than the voltage (for example, 2.2V) that does not operate normally in this circuit, it is arbitrarily set, for example, it is used as a display battery. The final state. Here, the first threshold 値 may be regarded as equivalent to the "predetermined 値" used in the determination of the above-described step S7, but is not limited to this example. Fig. 7 (a) and (b) are flowcharts showing the sensor driving in the control circuit unit 1 1 of the fourth modification. Fig. 7(a) shows the flow chart when the sensor drive is started, and Fig. 7(b) is the flow chart at the end of the sensor drive. Here, in the seventh (a) and (b), the same steps as those in the second (a) and (b) are denoted by the same step numbers, and the description thereof will be omitted. The processing of Fig. 7(a) as shown in Fig. 7 is the processing of steps S23 and S24 in the processing of Fig. 2(a). Further, as shown in the figure, the processing of Fig. 7(b) is added to step S20 instead of step S7 of Fig. 2(b), and the processing of steps S21 and S22 is additionally added. First, Fig. 7(b) will be explained. In the seventh diagram (b), if the determination in the above step S5 is YES, the step S6 is executed, and then the determination of "battery voltage < i th threshold" (step S20)' is performed instead of the above. 2 The battery voltage of the factory in step S7 of Figure (b) < The judgment. However, as described above, the first threshold 値 can also be regarded as equivalent to the above-mentioned "predetermined defect", and in this case, the step s 20 can be substantially regarded as the same as step S7. -25- 201250632 Then, if the battery voltage is less than the first threshold (YES in step S20), the processing in the above step S8 is performed, and then the determination of "battery voltage < second threshold?" is performed ( Step S 2 1 ). If the battery voltage is equal to or greater than the second threshold (step S 2 1, Ν Ο ), the processing is directly terminated. On the other hand, when the battery voltage is less than the second threshold (YES in step S2i1), it is determined that "the final state is established" (step S22). Specifically, the process of the step S22 is performed by, for example, turning on a flag indicating that the "final state is established" (referred to as a second flag). However, the present invention is not limited to this example. Next, Fig. 7(a) will be described. When the process of Fig. 7(a) is executed after the determination in the above step S20 is YES, the process of the above step S2 is YES, and the process of the above step S4 is performed. Next, the processing of step S4 is continued to determine whether or not it is the final state (step S23). For example, referring to the second flag, if the second flag is ON, it is determined to be the final state, and if the second flag is OFF, it is determined that the second flag is not the final state. If it is determined that it is not in the final state (NO in step S23), the processing is directly ended. If it is determined to be the final state (YES in step S23), the mode is shifted to the predetermined mode (step S24). Here, the "predetermined mode" may be substantially the same as, for example, the "predetermined mode" in the above step S1 1. That is, the "predetermined mode" may be, for example, "the processing of FIG. 7(b) is not performed" Mode of (not monitoring battery voltage). Alternatively, the "predetermined mode" may be "the processing of Fig. 7 (a), (b) is not performed, and the driving system of the heater resistor 2b is often performed by the boosted voltage (SW1 is always turned ON during driving) Mode." -26-201250632 However, although not shown in Fig. 7(b), if the determination in step S20 is NO, the processing in the above step S9 can be executed in substantially the same manner as in Fig. 4(b). Therefore, even if, for example, the temporary abnormality of the battery voltage is lowered and the battery voltage is less than the first threshold, the battery voltage is not lower than the second threshold, and even if it is determined that "the battery voltage is lowered" In the state in which the boosted voltage is used, the battery voltage returns to the normal state, that is, returns to the state in which the battery voltage is used (normal state). As described above, in the fourth modification, by using: The first threshold 切换 used for switching between the battery voltage and the boost voltage, and the second threshold 使用 used to determine whether or not the battery is used at the end of the battery, and it is determined that the battery is used at the end, then it becomes unmonitored after that. The state of the battery voltage. Thereby, the processing load is reduced, so that the power consumption can be suppressed and the time (battery life) of the normal operation can be prolonged. In addition, there is a case where the battery voltage temporarily drops abnormally for some reason. That is, regardless of the end period, it is possible to avoid the case where the heater resistor 2b is driven by the boost voltage after the end. Even if the heater resistor 2b is temporarily driven by the boost voltage, it is possible to return to the state (normal state) in which the heater resistor 2b is driven by the battery voltage. Thereby, it is possible to avoid a situation in which the normal operation time is shortened. 〇 Wherein, of course, when the voltage is driven by the boost voltage, the power consumption is larger than when the battery voltage is driven. In addition, 'the above-mentioned 'driving the heater resistor 2b by the boosting voltage' is equivalent to supplying the boosted voltage to the sensing when the sensor section (including the heater resistor 2b) is driven -27-201250632. Device (heater resistor 2b, etc.). Similarly, the above "driving the heater resistor 2b by the battery voltage" corresponds to supplying the battery voltage to the sensor portion (the heater resistor 2b) when the sensor portion (including the heater resistor 2b) is driven. Wait). As described above, in the present method, in the configuration of Fig. 1 described above, Fig. 2(a), (b), Fig. 4(a), (b) to Fig. 7(a), (b) are performed. Any processing, whereby the driving of the gas sensor 2, in normal times, can reduce the loss of battery consumption by the battery voltage supplied to the battery unit 1, and at the end of the battery use, the boosting circuit is provided. The boost voltage is switched in such a way as to extend the normal operation time. In this way, the longevity of the smuggler can be achieved. In addition, it helps to satisfy the above requirements, that is, as described in the subject of the prior art, with regard to the battery type sniffer, it is stipulated that the battery replacement is not allowed (so the repeller itself is replaced if it is delivered) It is necessary to carry out normal operations for more than 5 years, and to achieve long S life by this method is helpful to fully satisfy the regulations. The configuration of the first drawing and the processing of the second drawing (a) and (b) are merely examples, and are not limited to this example. In addition, the application of this method may also be, for example, a fire detector, and is not limited to a gas leak detector. With the battery type alarm device or the like according to the present invention, with respect to the battery type sniffer, especially regarding the configuration of the sensor drive, the loss of battery consumption can be reduced, and at the end of the battery use, the time for normal operation can be prolonged. Therefore, the longevity of the launcher can be realized. [Simple description of the drawing] -28- 201250632 Fig. 1 is a circuit diagram of the battery type gas leakage alarm of this example. Fig. 2 (a) and (b) are flowcharts showing the processing of the sensor drive by the control circuit unit (1). Figure 3 is a time diagram of the sensor drive. Fig. 4 (a) and (b) are flowcharts showing the processing of the sensor drive by the control circuit unit (2). Fig. 5 (a) and (b) are flowcharts showing the processing of the sensor drive by the control circuit unit (3). - Fig. 6 (a) and (b) are flowcharts of the processing of the sensor drive by the control circuit unit (4). Fig. 7 (a) and (b) are flowcharts showing the processing of the sensor drive by the control circuit unit (5). Fig. 8 is a circuit diagram of a conventional battery type gas leakage alarm. [Description of main component symbols] 1 : Battery unit 2 : Gas sensor 2a : Sensor resistance 2b : Heater resistance 3 : Control circuit unit 4 : Alarm unit 4 a : Alarm sound output unit 4 b : Alarm display unit 4 c : External Alarm output unit -29-201250632 5 : Ambient temperature detecting unit 6: First constant voltage circuit unit 7: Second constant voltage circuit unit 10: Gas leak starter 1 1 : Control circuit unit 1 2 : Boost circuit unit AD 1. AD2 'AD3: Input terminal OUT5: Output terminals OUT1, OUT2, OUT3, OUT4, R1: Load resistors SW1 to SW4: Switch VDD: Boost voltage -30-