TWI427564B - Fire alarm - Google Patents
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- TWI427564B TWI427564B TW98103213A TW98103213A TWI427564B TW I427564 B TWI427564 B TW I427564B TW 98103213 A TW98103213 A TW 98103213A TW 98103213 A TW98103213 A TW 98103213A TW I427564 B TWI427564 B TW I427564B
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Description
本發明係有關於一種設於住宅而可藉電池驅動檢測火災煙霧發出警報之警報器。The present invention relates to an alarm device that is installed in a house and can be used to detect a fire smoke by a battery drive.
本申請係以日本特願2007-188055號為基礎申請,而引用其內容。The application is based on Japanese Patent Application No. 2007-188055, the contents of which are incorporated herein by reference.
住宅用火災警報器已為人熟知之習知警報器(光電式煙霧感知器)具有可在室內煙霧濃度超過預定值時檢測火災,並使警報顯示燈閃爍,同時藉聲響警報通知鄰近已發生火災之警報功能。Residential fire alarms are well-known conventional alarms (photoelectric smoke sensors) that detect fires when the indoor smoke concentration exceeds a predetermined value and cause the alarm display to flash, while notifying the nearby fires by sounding an alarm Alarm function.
上述之住宅用之警報器係以鋰電池為電源而動作,並保證一旦裝設電池,在諸如7年間不需更換電池,而可監控火災。The above-mentioned residential alarms operate with a lithium battery as a power source, and ensure that once the battery is installed, the battery can be monitored without changing the battery for seven years.
上述之警報器之電池電壓為諸如3伏特,在發光驅動LED之電壓上為較低者,故藉升壓電路將電池電壓升壓至諸如2倍之6伏特而使LED發光。藉此,即便微秒級之短時間發光,亦可由LED發出充分光量之光線,而得到已流入檢煙室內之煙霧粒子所致之散射光。The above-mentioned alarm device has a battery voltage of, for example, 3 volts, which is lower in the voltage of the illuminating driving LED, so that the boosting circuit boosts the battery voltage to, for example, 6 volts to make the LED emit light. Thereby, even if the microsecond light is emitted for a short period of time, the LED can emit a sufficient amount of light to obtain the scattered light which has flowed into the smoke detecting chamber.
第5圖係共同顯示有習知之警報器之發光驅動電路及MPU之功能區圖。該圖所示之發光驅動電路100除電池102外並設有恆定電壓電路104,而對容量較大之電容器106進行一定電壓之充電。電容器106則經電晶體及FET等開關元件108而串列連接有容量較大之電容器110及電阻111,進而,連接有與開關元件108及電容器110所構成之串列電路呈並列關係之電阻112。藉以上之連接構造,而構成了電荷幫浦電路。電容器110之2次側則經開關元件114而連接有發光元件之LED116。Fig. 5 is a functional area diagram showing the light-emitting drive circuit and the MPU of the conventional alarm device. The light-emitting drive circuit 100 shown in the figure is provided with a constant voltage circuit 104 in addition to the battery 102, and charges a capacitor having a larger capacity to a certain voltage. The capacitor 106 is connected in series with a capacitor 110 and a resistor 111 having a large capacity via a switching element 108 such as a transistor or an FET, and further connected to a resistor 112 in a parallel relationship with the tandem circuit including the switching element 108 and the capacitor 110. . With the above connection structure, a charge pump circuit is constructed. The secondary side of the capacitor 110 is connected to the LED 116 of the light-emitting element via the switching element 114.
電池102可在開關元件108、114關閉之狀態下,經電阻11而將電容器110充電至恆定電壓。其次,若已屆諸如每10秒一次之火災檢測周期,則由MPU118啟動開關元件108,而對電容器106串列連接電容器110以升壓至2倍之電壓。同時,MPU118將啟動開關元件114,而對LED116施予已藉電容器106、110之串列連接而升壓之電壓以令其發光。The battery 102 can charge the capacitor 110 to a constant voltage via the resistor 11 with the switching elements 108, 114 turned off. Secondly, if a fire detection cycle such as once every 10 seconds has elapsed, the switching element 108 is activated by the MPU 118, and the capacitor 106 is connected in series to the capacitor 110 to boost the voltage by a factor of two. At the same time, the MPU 118 will activate the switching element 114 and apply a voltage boosted by the series connection of the capacitors 106, 110 to the LED 116 to cause it to illuminate.
來自LED116之光線將碰撞已流入檢煙空間之煙霧粒子而散射。該散射光將為受光元件之光二極體120所接收而轉換為微弱之受光訊號,並藉受光放大電路122而與發光驅動同步而放大後,再輸入MPU118,進而藉AD轉換而轉換為受光資料。該受光資料若超過預定之火災程度,則使警報輸出電路124動作而發出火災警報。Light from LED 116 will scatter by colliding with smoke particles that have flowed into the smoke detection space. The scattered light is received by the photodiode 120 of the light receiving element and converted into a weak received light signal, and amplified by the optical amplifying circuit 122 in synchronization with the light emitting driving, and then input to the MPU 118, and then converted into light receiving data by AD conversion. . When the light receiving data exceeds a predetermined degree of fire, the alarm output circuit 124 is operated to generate a fire alarm.
第6圖係共同顯示其它警報器之發光驅動電路及MPU之功能區圖。發光驅動電路100未設有恆定電壓電路,而藉電池102對容量較大之電容器126進行一定電壓之充電。電容器126則經開關元件128而串列連接有容量較小之電容器130,進而,連接有與開關元件128及電容器130之串列電路呈並列關係之逆流防止用二極體132。又,與電容器130串列地連接有開關元件134。Figure 6 is a diagram showing the functional area of the illumination driving circuit and the MPU of the other alarms. The light-emitting drive circuit 100 is not provided with a constant voltage circuit, and the battery 102 is charged with a certain voltage by the battery 102. The capacitor 126 is connected in series with the capacitor 130 having a small capacity via the switching element 128, and further connected to the reverse current preventing diode 132 in parallel with the tandem circuit of the switching element 128 and the capacitor 130. Further, a switching element 134 is connected in series with the capacitor 130.
電容器130之2次側則經逆流防止用二極體136而連接有容量較大之電容器138,進而,經開關元件140及恆定電壓電路142而連接有發光元件之LED116。On the secondary side of the capacitor 130, a capacitor 138 having a large capacity is connected via the reverse current preventing diode 136, and the LED 116 of the light-emitting element is connected via the switching element 140 and the constant voltage circuit 142.
電池102可在開關元件128關閉,且開關元件134啟動之狀態下,經逆流防止用二極體132而對容量較小之電容器130充電。然後,MPU118將開關元件128切換為啟動,並將開關元件134切換為關閉,再對電容器126串列連接電容器130,並藉已升壓之電壓,經逆流防止用二極體136而重複進行對容量較大之電容器138充電之動作。其次,若已屆10秒1次之火災檢測周期,則啟動開關元件140,並對LED116施予升壓電壓以令其發光。The battery 102 can charge the capacitor 130 having a small capacity via the reverse current preventing diode 132 in a state where the switching element 128 is turned off and the switching element 134 is activated. Then, the MPU 118 switches the switching element 128 to start, and switches the switching element 134 to off, and then connects the capacitor 130 to the capacitor 126 in series, and repeats the countercurrent prevention diode 136 by the boosted voltage. The charging operation of the capacitor 138 having a larger capacity. Next, if the fire detection period has been once every 10 seconds, the switching element 140 is activated, and the boosted voltage is applied to the LED 116 to cause it to emit light.
如上所述,藉容量較小之電容器130進行重複充電,即可抑制每次電荷之移動量,而降低開關元件128、134之容量。又,僅於發光動作時使恆定電壓電路142動作。As described above, by repeating the charging by the capacitor 130 having a small capacity, the amount of movement of each charge can be suppressed, and the capacity of the switching elements 128, 134 can be reduced. Further, the constant voltage circuit 142 is operated only during the light-emitting operation.
【專利文獻1】特開2007-011828號公報[Patent Document 1] JP-A-2007-011828
【專利文獻2】特開2006-350412號公報[Patent Document 2] JP-A-2006-350412
【專利文獻3】特開2007-179367號公報[Patent Document 3] JP-A-2007-179367
【專利文獻4】實開平05-008696號公報[Patent Document 4] Shikaiping 05-008696
然而,上述之習知之住宅用警報器之發光驅動電路具有以下問題。However, the above-described conventional light-emitting drive circuit for a residential alarm has the following problems.
首先,第5圖所示之發光驅動電路100須設置恆定電壓電路104,且,恆定電壓電路104之消耗電流亦有縮短電池壽命之問題。進而,為進行升壓動作,使用可流通較大電流之電晶體等之開關元件須設2個,亦有成本增高之問題。First, the light-emitting drive circuit 100 shown in FIG. 5 is required to provide the constant voltage circuit 104, and the current consumption of the constant voltage circuit 104 also has a problem of shortening the battery life. Further, in order to perform the boosting operation, two switching elements such as a transistor capable of circulating a large current are required, and there is also a problem that the cost is increased.
又,第6圖所示之發光驅動電路100中,恆定電壓電路142並未固定消耗電流,升壓所使用之電容器130容量亦較小,故升壓所使用之開關元件128、134可採用小型之電晶體。然而,由於藉開關元件128、134之反覆動作進行升壓,故多餘之基極電流將流過電晶體,且,升壓動作時亦將流通MPU118之動作電流,故有電池102之壽命縮短之問題。進而,電容器130之逆流防止須設二極體136,故亦有零件數量增加而提高成本之問題。Further, in the light-emitting drive circuit 100 shown in Fig. 6, the constant voltage circuit 142 does not have a constant current consumption, and the capacitor 130 used for boosting has a small capacity. Therefore, the switching elements 128 and 134 used for boosting can be small. The transistor. However, since the boosting operation is performed by the reverse operation of the switching elements 128 and 134, the excess base current will flow through the transistor, and the operating current of the MPU 118 will also flow during the boosting operation, so that the life of the battery 102 is shortened. problem. Further, the reverse flow prevention of the capacitor 130 prevents the diode 136 from being provided, so that the number of parts is increased and the cost is increased.
本發明即有鑑於上述問題而設計,目的在提供一種即便必須升壓發光,亦可進而減少消耗電流延長電池壽命,同時降低零件數量與成本之警報器。The present invention has been devised in view of the above problems, and an object of the present invention is to provide an alarm device which can reduce the current consumption and extend the life of the battery while reducing the number of components and cost, even if it is necessary to increase the light emission.
本發明為解決上述問題而達成上述目的,採用了以下方法。The present invention has attained the above object in order to solve the above problems, and employs the following method.
即,(1)本發明之警報器包含有:發光部;電池電源;升壓電路,可使前述電池電源之電壓升壓而生成升壓電壓;發光控制部,可控制前述升壓電路,而在得到前述升壓電壓時對前述發光部供給前述升壓電壓,以使其間歇地發光驅動;受光部,可接受來自前述發光部之光線因煙霧而散射後之散射光照射;轉換電路,可將來自前述受光部之受光訊號轉換為受光資料;火災檢測部,可基於來自前述轉換電路之前述受光資料而檢測火災;警報部,可依據來自前述火災檢測部之火災檢測訊號而發出警報;基準電壓電路,可生成相對前述升壓電路及前述轉換電路之基準電壓;及,時鐘電路,可輸出用以使前述升壓電路、前述發光控制部及前述轉換電路動作之時鐘訊號;而,可藉程式之執行而實現前述發光控制部及前述火災檢測部之功能之處理電路、前述升壓電路、前述轉換電路、前述基準電壓電路、前述時鐘電路、前述各電路部之控制電路係設於已封裝之積體電路上。That is, (1) the alarm device of the present invention includes: a light-emitting portion; a battery power source; and a booster circuit that can boost a voltage of the battery power source to generate a boosted voltage; and the light-emission control unit can control the booster circuit. When the boosted voltage is obtained, the boosted voltage is supplied to the light-emitting portion so as to be intermittently driven to emit light; and the light-receiving portion can receive scattered light that is scattered by the light from the light-emitting portion due to smoke; and the conversion circuit can The light receiving signal from the light receiving unit is converted into light receiving data; the fire detecting unit detects the fire based on the light receiving data from the converting circuit; and the alarm unit can issue an alarm based on the fire detecting signal from the fire detecting unit; a voltage circuit capable of generating a reference voltage relative to the booster circuit and the conversion circuit; and a clock circuit for outputting a clock signal for operating the booster circuit, the light-emitting control unit, and the conversion circuit; a processing circuit for realizing the functions of the light emission control unit and the fire detection unit, and the boosting power , The conversion circuit, the reference voltage circuit, the clock circuit, each control circuit portion of the circuit line disposed on the integrated circuit has been packaged.
(2)本發明中作為對應前述時鐘電路之前述控制電路亦可包含:時鐘產生電路,可輸出低速時鐘訊號及高速時鐘訊號;切換機構,可選擇前述低速時鐘訊號或前述高速時鐘訊號;及,控制部,可於已設定測試模式時,對前述切換機構選擇輸出前述高速時鐘訊號,而於已設定非測試模式時,則對前述切換機構選擇輸出低速時鐘。(2) The control circuit corresponding to the clock circuit of the present invention may further include: a clock generation circuit that outputs a low-speed clock signal and a high-speed clock signal; and a switching mechanism that selects the low-speed clock signal or the high-speed clock signal; and The control unit may select and output the high-speed clock signal to the switching mechanism when the test mode is set, and select a low-speed clock for the switching mechanism when the non-test mode is set.
(3)本發明中作為對應前述時鐘電路之前述控制電路亦可包含:第1切換部,可使由前述時鐘電路對前述處理電路供給之前述時鐘訊號開啟或關閉;第2切換部,可使由前述時鐘電路對前述升壓電路供給之前述時鐘訊號開啟或關閉;升壓設定定時器,可設定前述升壓電路之動作時間;休眠設定定時器,可設定前述處理電路之休眠時間;升壓控制部,可在關閉前述第1切換部而停止對前述處理電路供給前述時鐘訊號之狀態下,啟動前述第2切換部而進行對前述升壓電路供給前述時鐘訊號而令其動作,進而起動前述升壓設定定時器而監視升壓設定時間之經過;處理控制部,可在前述升壓設定定時器之前述升壓設定時間經過時,關閉前述第2切換部而在停止對前述升壓電路供給前述時鐘訊號之狀態下,啟動前述第1切換部而進行對前述處理電路供給前述時鐘訊號而令其動作;及,休眠控制部,可在前述處理電路之動作結束時,關閉前述第1切換部而停止供給前述時鐘訊號,同時起動前述休眠設定定時器而監視前述休眠設定時間之經過,並在前述休眠設定時間經過時轉移至前述升壓控制部之處理。(3) The control circuit corresponding to the clock circuit of the present invention may further include: a first switching unit that turns on or off the clock signal supplied from the clock circuit to the processing circuit; and the second switching unit may The clock signal supplied to the boosting circuit by the clock circuit is turned on or off; the boost setting timer can set the operating time of the boosting circuit; and the sleep setting timer can set the sleep time of the processing circuit; The control unit activates the second switching unit while the first switching unit is turned off, and stops the supply of the clock signal to the processing circuit, and supplies the clock signal to the boosting circuit to operate the clock signal. The boost setting timer monitors the passage of the boost setting time; and the processing control unit turns off the second switching unit and stops supplying the boosting circuit when the boost setting time of the boost setting timer elapses In the state of the clock signal, the first switching unit is activated to supply the clock signal to the processing circuit. And the sleep control unit may stop the supply of the clock signal when the operation of the processing circuit is completed, stop the supply of the clock signal, and start the sleep setting timer to monitor the sleep setting time. When the sleep setting time elapses, the process shifts to the processing of the boosting control unit.
(4)前述控制電路亦可採用包含控制暫存器,其則包含對應前述第1切換部及前述第2切換部之第1控制位元及第2控制位元,對應前述第1控制位元及前述第2控制位元之相對之位元設定及位元重設,則可進行前述第1切換部及前述第2切換部之啟動或關閉而控制前述時鐘訊號之供給及停止之構造。(4) The control circuit may include a control register including a first control bit and a second control bit corresponding to the first switching unit and the second switching unit, and corresponding to the first control bit. And the bit setting and the bit reset of the second control bit, the structure of the supply and stop of the clock signal can be controlled by starting or closing the first switching unit and the second switching unit.
(5)前述升壓電路部亦可輸入由前述基準電壓電路輸出之前述基準電壓而生成約2倍之升壓電壓。(5) The booster circuit unit may input the reference voltage output from the reference voltage circuit to generate a boost voltage of about twice.
依據本發明之警報器,設置可藉程式之執行而實現發光控制部及火災檢測部之功能之處理電路、升壓電路、基準電壓電路於積體電路上,即可將藉升壓電壓而發光驅動之外部電路降至必要最小限度。因此,依據本發明,可實現零件數量及成本之減少。According to the alarm device of the present invention, a processing circuit, a boosting circuit, and a reference voltage circuit that realize the functions of the light-emitting control unit and the fire detecting unit by execution of the program can be provided on the integrated circuit, and the boost voltage can be used to emit light. The external circuitry of the drive is reduced to the necessary minimum. Therefore, according to the present invention, the number of parts and the cost can be reduced.
又,於積體電路設置升壓電路,則可就升壓動作所使用之開關元件使用諸如雙極電晶體等不致流通多餘基極電流之電路。因此,依據本發明,可減少消耗電流而進而延長電池壽命。Further, when a booster circuit is provided in the integrated circuit, a circuit such as a bipolar transistor that does not flow excess base current can be used as the switching element used for the boosting operation. Therefore, according to the present invention, current consumption can be reduced and battery life can be prolonged.
又,在升壓電路動作時停止處理電路之時鐘供給,並於處理電路動作時停止升壓電路之時鐘供給,進而,在諸如10秒周期之火災檢測周期之發光空檔時間內,停止對處理電路及升壓電路雙方之時鐘供給而形成休眠狀態。採用上述構造,則可大幅減少積體電路之消耗電流,而延長電池壽命。Further, when the boosting circuit operates, the clock supply of the processing circuit is stopped, and when the processing circuit operates, the clock supply of the boosting circuit is stopped, and further, the processing is stopped during the lighting neutral time of a fire detection period such as a 10-second period. The clock is supplied to both the circuit and the booster circuit to form a sleep state. With the above configuration, the current consumption of the integrated circuit can be greatly reduced, and the battery life can be prolonged.
尤其,停止處理電路之時鐘供給而進行之升壓電路之動作,若使用低速時鐘而以諸如近300毫秒之時間緩慢升壓,即可以極小之消耗電流進行升壓。因此,依據本發明,可就積體電路整體大幅降低消耗電流,而延長電池壽命。In particular, the operation of the booster circuit, which is performed by stopping the clock supply of the processing circuit, can be boosted with a very small current consumption if the low-speed clock is used to slowly boost, for example, for a period of nearly 300 milliseconds. Therefore, according to the present invention, the current consumption can be greatly reduced as a whole of the integrated circuit, and the battery life can be prolonged.
又,設於積體電路之升壓電路可輸入來自可產生同樣設於積體電路之AD轉換電路之基準電壓之基準電壓電路之基準電壓而升壓。因此,依據本發明,無須設置恆定電壓電路,即可簡易生成穩定之升壓電壓。Further, the booster circuit provided in the integrated circuit can be boosted by inputting a reference voltage from a reference voltage circuit capable of generating a reference voltage of the AD conversion circuit also provided in the integrated circuit. Therefore, according to the present invention, it is possible to easily generate a stable boost voltage without providing a constant voltage circuit.
進而,在製造階段之檢查步驟等中,可藉外部設定而選擇高速時鐘,故亦可使檢查步驟之動作高速化,並縮短檢查所需之作業時間。Further, in the inspection step of the manufacturing stage or the like, the high-speed clock can be selected by external setting, so that the operation of the inspection step can be speeded up, and the work time required for the inspection can be shortened.
第1圖係顯示本發明之警報器之一實施例之電路區塊圖。BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit block diagram showing an embodiment of an alarm device of the present invention.
第2圖係顯示上述實施例之設於積體電路之控制邏輯電路之電路區塊圖。Fig. 2 is a circuit block diagram showing the control logic circuit provided in the integrated circuit of the above embodiment.
第3圖係顯示上述實施例之火災監視控制之時間圖。Fig. 3 is a timing chart showing the fire monitoring control of the above embodiment.
第4圖係上述火災監視控制之流程圖。Figure 4 is a flow chart of the above fire monitoring control.
第5圖係顯示包含習知之恒定電壓電路及發光驅動電路之習知警報器之電路區塊圖。Figure 5 is a circuit block diagram showing a conventional alarm including a conventional constant voltage circuit and an illumination driving circuit.
第6圖係顯示重複充電容量較小之電容器而升壓之習知之警報器之電路區塊圖。Fig. 6 is a circuit block diagram showing a conventional alarm device for boosting a capacitor having a smaller charge capacity.
第1圖係顯示本發明之住宅用警報器(光電式煙霧感知器)之一實施例之電路區塊圖。如該圖所示,本實施例之警報器包含積體電路10。該積體電路10則連接有外部電路。Fig. 1 is a circuit block diagram showing an embodiment of a residential alarm (photoelectric smoke sensor) of the present invention. As shown in the figure, the alarm device of this embodiment includes an integrated circuit 10. The integrated circuit 10 is connected to an external circuit.
積體電路10上設有電源電路12、具處理電路之功能之MPU14、可生成用以發光驅動之升壓電壓之升壓電路20、AD轉換電路22、基準電壓電路24、控制邏輯電路25、時鐘電路26。The integrated circuit 10 is provided with a power supply circuit 12, an MPU 14 having a function of a processing circuit, a boosting circuit 20 capable of generating a boosted voltage for driving light, an AD conversion circuit 22, a reference voltage circuit 24, a control logic circuit 25, Clock circuit 26.
時鐘電路26上設有可產生低速時鐘CLK1及高速時鐘CLK2之2種時鐘訊號之時鐘產生電路28,以及可切換輸出低速時鐘CLK1及高速時鐘CLK2之多工器(切換機構。MUX)30。The clock circuit 26 is provided with a clock generating circuit 28 that can generate two types of clock signals of the low speed clock CLK1 and the high speed clock CLK2, and a multiplexer (switching mechanism MUX) 30 that can switch between the output low speed clock CLK1 and the high speed clock CLK2.
MPU14係所謂單晶片計算機。該MPU14之匯流排設有RAM、ROM及介面部,執行程式之功能則可實現火災監視控制部16及發光控制部18之功能。The MPU 14 is a so-called single-chip computer. The busbar of the MPU 14 is provided with a RAM, a ROM, and a face portion, and the function of the program can realize the functions of the fire monitoring control unit 16 and the light emission control unit 18.
設於積體電路10之升壓電路20則外部連接有升壓所使用之電容器34。又,基準電壓電路24則外部連接有使基準電壓穩定所需之電容器36。The booster circuit 20 provided in the integrated circuit 10 is externally connected to a capacitor 34 used for boosting. Further, the reference voltage circuit 24 is externally connected to a capacitor 36 required to stabilize the reference voltage.
積體電路10連接有作為電源使用之電池38,以作為外部電路。電池38係使用諸如鋰電池等。電池38以外,並連接有電源用電容器40。The integrated circuit 10 is connected to a battery 38 used as a power source as an external circuit. The battery 38 is used such as a lithium battery or the like. A power supply capacitor 40 is connected to the battery 38.
為充電由升壓電路20輸出之升壓電壓,而設有升壓保持用電容器42。該升壓保持用電容器42以外,並設有發光驅動開關44。進而,與發光驅動開關44串列而設有構成發光部之LED46。A boost holding capacitor 42 is provided to charge the boosted voltage output from the booster circuit 20. In addition to the boost holding capacitor 42, a light-emitting drive switch 44 is provided. Further, an LED 46 constituting the light-emitting portion is provided in series with the light-emitting drive switch 44.
發光驅動開關44可藉MPU14之發光控制部18,在諸如預定之發光周期T0(例如T0=10秒間隔)內,於微秒級之短時間內啟動,並對LED46供給已藉升壓電路20而充電之升壓保持用電容器42之升壓電壓以令其發光。The illuminating drive switch 44 can be activated by the illuminating control unit 18 of the MPU 14 in a short time period such as a predetermined lighting period T0 (for example, T0=10 second interval), and supplies the boosted circuit 20 to the LED 46. The boosted booster holds the boosted voltage of the capacitor 42 to cause it to emit light.
LED46發光所發出光線將碰撞已流入未圖示之檢煙部之煙霧粒子而產生散射光。該散射光將為構成外部連接於積體電路10之受光放大電路50之受光部之光二極體48所接收而形成受光電流,並為受光放大電路50所放大。另,受光放大電路50之局部亦可設於積體電路10內。The light emitted by the LED 46 emits light to collide with the smoke particles that have flowed into the smoke detecting portion (not shown) to generate scattered light. This scattered light is received by the photodiode 48 constituting the light receiving portion of the light receiving/amplifying circuit 50 externally connected to the integrated circuit 10 to form a light receiving current, and is amplified by the light receiving amplifying circuit 50. Further, a part of the light receiving amplifying circuit 50 may be provided in the integrated circuit 10.
來自受光放大電路50之受光訊號將於積體電路10之AD轉換電路22內數位轉換為受光資料,再為MPU14所讀取。受光放大電路50可藉MPU14之受光同步開關32之切換而與LED46之發光同步驅動,並放大受光電流。The received light signal from the light-receiving amplifying circuit 50 is digitally converted into light-receiving data in the AD conversion circuit 22 of the integrated circuit 10, and is read by the MPU 14. The light receiving amplifying circuit 50 can be driven in synchronization with the light emission of the LED 46 by the switching of the light receiving synchronous switch 32 of the MPU 14, and amplify the light receiving current.
設於MPU14之火災監視控制部16可將自AD轉換電路22讀取之受光資料與預定之火災程度比較,若超過火災程度,則判斷已發生火災。其次,使第1圖之LED46右側所示之使用LED之告警顯示燈52閃爍或點亮,同時啟動蜂鳴器驅動開關56而藉蜂鳴器54之鳴響發出聲響警報。The fire monitoring control unit 16 provided in the MPU 14 can compare the light receiving data read from the AD conversion circuit 22 with a predetermined degree of fire, and if it exceeds the degree of fire, it is determined that a fire has occurred. Next, the alarm display lamp 52 using the LED shown on the right side of the LED 46 of Fig. 1 is blinked or lit, and the buzzer drive switch 56 is activated to sound an audible alarm by the buzzer 54.
MPU14可啟動傳訊電路58之開關元件,而在傳訊端子60連接有其它機器時,藉流通傳訊電流而輸出傳訊訊號。The MPU 14 can activate the switching elements of the communication circuit 58 and, when the other terminals of the communication terminal 60 are connected, output a communication signal by circulating a communication current.
積體電路10外部可於其製造時之檢查步驟時暫時連接檢查開關62。檢查開關62與積體電路10之控制邏輯電路25連接。若啟動檢查開關62,則控制邏輯電路25將對多工器30輸出高速時鐘CLK2之選擇控制訊號。如此,多工器30將選擇來自時鐘產生電路28之高速時鐘CLK2,並經控制邏輯電路25而對MPU14及升壓電路20供給高速時鐘CLK2。其次,相對於通常之低速時鐘CLK1之動作,檢查時將可選擇可在短時間內檢查MPU14及升壓電路20之高速動作。The outside of the integrated circuit 10 can be temporarily connected to the inspection switch 62 at the inspection step at the time of its manufacture. The check switch 62 is connected to the control logic circuit 25 of the integrated circuit 10. If the check switch 62 is activated, the control logic circuit 25 will output a selection control signal for the high speed clock CLK2 to the multiplexer 30. Thus, the multiplexer 30 selects the high speed clock CLK2 from the clock generating circuit 28, and supplies the high speed clock CLK2 to the MPU 14 and the boosting circuit 20 via the control logic circuit 25. Next, with respect to the operation of the normal low-speed clock CLK1, the high-speed operation of the MPU 14 and the booster circuit 20 can be checked in a short time.
設於積體電路10之控制邏輯電路25可控制對MPU14及升壓電路20之時鐘訊號之供給及停止。本實施例中,在T0=10秒之發光周期內,將先經過升壓設定時間T1,控制邏輯電路25則在停止對MPU14供給時鐘訊號之狀態下,對升壓電路20供給時鐘訊號。其次,上述時鐘訊號之供給則可在T1時間內使升壓電路20動作,並進行使升壓保持用電容器42發光所需之升壓電壓之依序充電。The control logic circuit 25 provided in the integrated circuit 10 controls the supply and stop of the clock signals to the MPU 14 and the booster circuit 20. In the present embodiment, during the lighting period of T0=10 seconds, the boosting setting time T1 is first passed, and the control logic circuit 25 supplies the clock signal to the boosting circuit 20 while stopping the supply of the clock signal to the MPU 14. Next, the supply of the clock signal can operate the booster circuit 20 in the time T1 and sequentially charge the boosted voltage required to cause the boost holding capacitor 42 to emit light.
升壓設定時間T1內之升壓動作結束後,控制邏輯電路25則停止對升壓電路20供給時鐘訊號,而切換成對MPU14供給時鐘訊號。藉此,可使MPU14動作而執行以下作業:發光控制部18之LED46之發光控制;將光二極體48接收上述散射光再經受光放大而成之訊號於AD轉換電路22內轉換成受光資料並加以存入之處理;火災監視控制部16中比較受光資料與火災程度而檢知火災有無發生之處理。After the boosting operation in the boost setting time T1 is completed, the control logic circuit 25 stops supplying the clock signal to the boosting circuit 20, and switches to supply the clock signal to the MPU 14. Thereby, the MPU 14 can be operated to perform the following operations: the illumination control of the LED 46 of the illumination control unit 18; and the signal obtained by the optical diode 48 receiving the scattered light and then being optically amplified is converted into the received light data by the AD conversion circuit 22 and The fire monitoring control unit 16 compares the received light data with the degree of fire to detect whether or not the fire has occurred.
MPU14在發光控制部18及火災監視控制部16之處理結束後,將對控制邏輯電路25輸出控制訊號。其次,維持停止對升壓電路20供給時鐘訊號,並停止對MPU14供給時鐘訊號,而進入對MPU14及升壓電路20之時鐘訊號供給皆停止之休眠模式。After the processing of the light emission control unit 18 and the fire monitoring control unit 16 is completed, the MPU 14 outputs a control signal to the control logic circuit 25. Next, the supply of the clock signal to the booster circuit 20 is stopped, and the supply of the clock signal to the MPU 14 is stopped, and the sleep mode in which the supply of the clock signals to the MPU 14 and the booster circuit 20 is stopped is entered.
上述休眠模式將在休眠設定時間T2內藉定時器監控而繼續維持。一旦經過休眠設定時間T2後,控制邏輯電路25將開始對升壓電路20供給時鐘訊號,而開始次一發光驅動周期之處理,並反覆為之。The sleep mode described above will continue to be maintained by the timer monitoring during the sleep set time T2. Once the sleep set time T2 has elapsed, the control logic circuit 25 will begin to supply the clock signal to the boost circuit 20, and begin the processing of the next illumination drive cycle, and repeats.
第2圖係就本實施例之控制邏輯電路25之細節同時顯示有MPU14、升壓電路20、時鐘產生電路28及多工器30之電路區塊圖。2 is a circuit block diagram showing the MPU 14, the boosting circuit 20, the clock generating circuit 28, and the multiplexer 30 simultaneously with the details of the control logic circuit 25 of the present embodiment.
如上圖所示,控制邏輯電路25包含控制暫存器64、升壓設定定時器72、休眠設定定時器74、OR閘76、反相器78、具第1閘開關功能之AND閘80、具第2閘開關功能之AND閘82。As shown in the above figure, the control logic circuit 25 includes a control register 64, a boost setting timer 72, a sleep setting timer 74, an OR gate 76, an inverter 78, and an AND gate 80 having a first gate switch function. The AND gate 82 of the second gate switch function.
控制暫存器64係諸如8位元暫存器,其中任意3個位元則分成MPU時鐘控制位元66、升壓時鐘控制位元68、時鐘選擇位元70。The control register 64 is, for example, an 8-bit register, wherein any three bits are divided into an MPU clock control bit 66, a boost clock control bit 68, and a clock select bit 70.
控制暫存器64之MPU時鐘控制位元66及升壓時鐘控制位元68可藉升壓設定定時器72、休眠設定定時器74、OR閘76及反相器78所構成之電路部控制位元設定、位元重設。The MPU clock control bit 66 and the boost clock control bit 68 of the control register 64 can be controlled by a boost setting timer 72, a sleep setting timer 74, an OR gate 76, and an inverter 78. Meta-set, bit reset.
升壓設定定時器72中已設定升壓電路20之升壓動作所需之升壓設定時間T1。又,休眠設定定時器74中已設定休眠設定時間T2。本實施例中,一定周期T0=10秒而間歇進行發光驅動,故諸如升壓設定定時器72之升壓設定時間T1即設成約300毫秒。又,休眠設定定時器74之休眠設定時間T2則設成諸如T2=約9.6秒。因此,MPU14之動作時間約分配為100毫秒。當然,MPU14之動作時間係視當時之處理狀況不同,而在某範圍內變動者,並不受定時器設定之控制所影響。The boost setting time T1 required for the boosting operation of the booster circuit 20 is set in the boost setting timer 72. Further, the sleep setting time T2 is set in the sleep setting timer 74. In the present embodiment, since the light-emission driving is intermittently performed with a certain period T0 = 10 seconds, the boost setting time T1 such as the boost setting timer 72 is set to about 300 msec. Further, the sleep setting time T2 of the sleep setting timer 74 is set to, for example, T2 = about 9.6 seconds. Therefore, the action time of the MPU 14 is approximately allocated to 100 milliseconds. Of course, the action time of the MPU 14 is different depending on the processing status at that time, and the change in a certain range is not affected by the control of the timer setting.
控制暫存器64之MPU時鐘控制位元66若設在位元1,則形成AND閘80之許可狀態,而可對MPU14供給多工器30選出之時鐘訊號令其動作。If the MPU clock control bit 66 of the control register 64 is set to bit 1, the permission state of the AND gate 80 is formed, and the clock signal selected by the multiplexer 30 can be supplied to the MPU 14 to operate.
又,控制暫存器64之升壓時鐘控制位元68亦同,若設在位元1,則形成AND閘82之許可狀態,而可對升壓電路20供給來自多工器30之時鐘訊號令其進行升壓動作。Moreover, the boost clock control bit 68 of the control register 64 is also the same. If it is set to the bit 1, the permission state of the AND gate 82 is formed, and the booster circuit 20 can be supplied with the clock signal from the multiplexer 30. Let it perform the boosting action.
第3圖係顯示受第2圖所示之控制邏輯電路25所致之時鐘訊號之供給及停止影響之MPU14及升壓電路20之動作之時間圖。即,第3圖之(A)顯示MPU14之動作,第3圖之(B)則顯示控制暫存器64之MPU時鐘控制位元66,第3圖之(C)則顯示控制暫存器64之升壓時鐘控制位元68。又,第3圖之(D)顯示升壓設定定時器72、第3圖之(E)顯示休眠設定定時器74、進而第3圖之(F)則顯示升壓電路20之動作。Fig. 3 is a timing chart showing the operation of the MPU 14 and the booster circuit 20, which are affected by the supply and stop of the clock signal by the control logic circuit 25 shown in Fig. 2. That is, (A) of Fig. 3 shows the operation of the MPU 14, the (B) of Fig. 3 shows the MPU clock control bit 66 of the control register 64, and (C) of Fig. 3 shows the control register 64. The boost clock controls bit 68. Further, (D) of FIG. 3 shows the boost setting timer 72, (E) of FIG. 3 shows the sleep setting timer 74, and (F) of FIG. 3 shows the operation of the booster circuit 20.
第3圖中,先在時刻t1時對MPU14供給電源。該電源供給係實際上於住宅用之警報器裝設電池38而接頭連接時。In Fig. 3, power is supplied to the MPU 14 at time t1. This power supply is actually installed when the battery is installed in the alarm device for the home.
MPU14一旦藉電源供給而在時刻t1時動作,控制暫存器64之MPU時鐘控制位元66將接收當時之升壓設定定時器72之位元0為反相器78所逆轉換後之位元1之設定,而呈AND閘80之許可狀態,並由多工器30選擇時鐘產生電路28所輸出之通常時之低速時鐘CLK1,對MPU14加以供給而令其動作。Once the MPU 14 is operated by the power supply at time t1, the MPU clock control bit 66 of the control register 64 receives the bit 0 of the current boost setting timer 72 as the bit inverted by the inverter 78. The setting of 1 is in the permission state of the AND gate 80, and the multiplexer 30 selects the normal low speed clock CLK1 output from the clock generating circuit 28, and supplies the MPU 14 to operate.
藉上述時刻t1~t2中MPU14之動作,可進行初期判斷、初期設定,並使MPU呈作業狀態。By the operation of the MPU 14 at the above-mentioned time t1 to t2, the initial judgment and the initial setting can be performed, and the MPU can be placed in the work state.
時刻t2時,MPU14一旦結束伴隨電源投入之自我判斷、初期設定,則經OR閘76而對升壓設定定時器72輸出設定訊號,以起動升壓設定定時器72。At time t2, once the MPU 14 completes the self-determination and initial setting with the power-on, the MPU 14 outputs a setting signal to the boost setting timer 72 via the OR gate 76 to activate the boost setting timer 72.
該升壓設定定時器72藉MPU14而起動,定時器輸出則由先前之位準0上昇至位準1。其次,反相器78所致逆轉換則可使MPU時鐘控制位元66由先前之位元1重設為位元0,升壓時鐘控制位元68則由先前之位元0設定為位元1。The boost setting timer 72 is started by the MPU 14 and the timer output is raised from the previous level 0 to level 1. Second, the inverse conversion caused by the inverter 78 causes the MPU clock control bit 66 to be reset from the previous bit 1 to the bit 0, and the boost clock control bit 68 is set to the bit from the previous bit 0. 1.
因此,AND閘80將呈禁止狀態而停止對MPU14供給時鐘訊號,同時AND閘82則呈許可狀態,而開始對升壓電路20供給時鐘訊號。Therefore, the AND gate 80 will be in the disabled state to stop supplying the clock signal to the MPU 14, and the AND gate 82 is in the permission state, and the supply of the clock signal to the booster circuit 20 is started.
接收時鐘訊號之供給之升壓電路20可輸入第1圖所示之基準電壓電路24所輸出之基準電壓作為電源電壓,並藉使用外部連接之電容器34之充電轉送動作,對升壓保持用電容器42進行升壓電壓之依序充電,而生成諸如基準電壓之2倍之升壓電壓。The booster circuit 20 that receives the supply of the clock signal can input the reference voltage output from the reference voltage circuit 24 shown in FIG. 1 as the power supply voltage, and the boost transfer capacitor is used by the charge transfer operation of the externally connected capacitor 34. 42 performs sequential charging of the boosting voltage to generate a boosting voltage such as twice the reference voltage.
時刻t3時,若升壓設定定時器72得到升壓設定時間T1而定時屆至,升壓設定定時器72之輸出將由先前之位準1降至位準0,MPU時鐘控制位元66則藉反相器78而設為位元1,升壓時鐘控制位元68反而重設為位元0。At time t3, if the boost setting timer 72 obtains the boost setting time T1 and the timing is reached, the output of the boost setting timer 72 will be reduced from the previous level 1 to the level 0, and the MPU clock control bit 66 is borrowed. Inverter 78 is set to bit 1, and boost clock control bit 68 is instead reset to bit 0.
因此,AND閘82將呈禁止狀態而停止對升壓電路20供給時鐘訊號而停止升壓動作,同時AND閘80則呈許可狀態而進行對MPU14供給時鐘訊號而令其動作。Therefore, the AND gate 82 stops the supply of the clock signal to the booster circuit 20 and stops the boosting operation, while the AND gate 80 is in the permission state, and supplies the clock signal to the MPU 14 to operate it.
由該時刻t3起之MPU14受時鐘訊號供給所致之動作,可使第1圖所示之發光控制部18在微秒級之短時間內啟動發光驅動開關44,而對LED46供給升壓保持用電容器42所保持之升壓電壓以使其發光。When the MPU 14 is supplied with the clock signal from the time t3, the light-emission control unit 18 shown in Fig. 1 can activate the light-emission drive switch 44 for a short period of time in the microsecond range, and supply the boost-holding for the LED 46. The boosted voltage held by the capacitor 42 causes it to emit light.
LED46發光之光線將因已流入檢煙部之煙霧粒子而散射,進而為光二極體48所接收而得到受光電流。此時之MPU14則使受光同步開關32與發光驅動同步而暫時啟動,以對受光放大電路50供給電源而令其動作。藉此,受光放大電路50可放大光二極體48之受光訊號而加以輸出,受光訊號則輸入於AD轉換電路22而轉換為受光資料,並存入MPU14。The light emitted by the LED 46 is scattered by the smoke particles that have flowed into the smoke detecting portion, and is received by the photodiode 48 to obtain a light receiving current. At this time, the MPU 14 temporarily activates the light receiving synchronous switch 32 in synchronization with the light emission driving, and supplies power to the light receiving amplifying circuit 50 to operate it. Thereby, the light-receiving amplifying circuit 50 can amplify the received light signal of the optical diode 48 and output it, and the received light signal is input to the AD conversion circuit 22 to be converted into light-receiving data, and stored in the MPU 14.
MPU14之火災監視控制部16可比較自AD轉換電路22讀取之受光資料與預定之火災程度,若在火災程度以下,則結束連續之處理。其次,第3圖之時刻t4時,設於控制邏輯電路25之控制暫存器64之MPU時鐘控制位元66將由位元1重設為位元0,同時將重設休眠設定定時器74再予以啟動。The fire monitoring control unit 16 of the MPU 14 compares the received light data read from the AD conversion circuit 22 with a predetermined degree of fire, and if it is below the fire level, the continuous processing is terminated. Next, at time t4 of FIG. 3, the MPU clock control bit 66 of the control register 64 provided in the control logic circuit 25 will be reset from bit 1 to bit 0, and the sleep setting timer 74 will be reset. Start it.
藉此,可使控制暫存器64之MPU時鐘控制位元66及升壓時鐘控制位元68雙方皆為位元0而使AND閘80、82呈禁止狀態,進入對MPU14及升壓電路20雙方皆停止供給時鐘訊號之休眠狀態。Thereby, both the MPU clock control bit 66 and the boost clock control bit 68 of the control register 64 can be made to bit 0, and the AND gates 80 and 82 are in a disabled state, and enter the pair MPU 14 and the booster circuit 20 Both sides stop supplying the sleep state of the clock signal.
其後,在時刻t5時若休眠設定定時器74屆至休眠設定時間T2,則定時屆至而使定時器輸出由位準1降為位準0。此因已係逆轉換輸出,故經OR閘76而對升壓設定定時器72設定位準1而由時刻t5起予以重設再啟動。Thereafter, if the sleep setting timer 74 is reached to the sleep set time T2 at time t5, the timer output is reduced from level 1 to level 0. Since the cause is the inverse conversion output, the boost setting timer 72 is set to the level 1 via the OR gate 76, and is reset and restarted from the time t5.
一旦重設升壓設定定時器72再予以啟動,則將升壓時鐘控制位元68設為位元1,而使AND閘82呈許可狀態。其次,對升壓電路20供給時鐘訊號,而使其在升壓設定時間T1內再進行升壓動作。Once the boost set-up timer 72 is reset and then enabled, the boost clock control bit 68 is set to bit 1 and the AND gate 82 is asserted. Next, the booster circuit 20 is supplied with a clock signal, and the boosting operation is performed again during the boost set time T1.
接著,T1時間後若升壓設定定時器72定時屆至,則在時刻t6時將升壓時鐘控制位元68重設為位元0,同時將MPU時鐘控制位元66設成位元1。結果,將停止經AND閘82對升壓電路20供給時鐘訊號,同時將開始經AND閘82對MPU14供給時鐘訊號。其次,在時刻t6~t7內,將進行第1圖之MPU14所致之發光控制部18及火災監視控制部16之處理動作,以下,則就預定周期T0重複為之。Then, if the boost setting timer 72 is timed after the T1 time, the boost clock control bit 68 is reset to the bit 0 at time t6, and the MPU clock control bit 66 is set to the bit 1. As a result, the supply of the clock signal to the booster circuit 20 via the AND gate 82 will cease, and the supply of the clock signal to the MPU 14 via the AND gate 82 will begin. Then, in the time t6 to t7, the processing operation of the light emission control unit 18 and the fire monitoring control unit 16 by the MPU 14 in Fig. 1 is performed, and the predetermined period T0 is repeated.
第4圖係顯示本實施例之火災監視控制之流程圖,以下一併參照第2圖進行說明。Fig. 4 is a flow chart showing the fire monitoring control of the present embodiment, which will be described below with reference to Fig. 2.
第4圖中,電源投入,即,一旦藉電池38之裝設而供給電源,則於步驟S1中執行MPU起動處理。In Fig. 4, the power is turned on, that is, once the power is supplied by the installation of the battery 38, the MPU start processing is executed in step S1.
接著,步驟S2中,MPU14將控制暫存器64之MPU時鐘控制位元66重設為位元0,同時於步驟S3中將升壓時鐘控制位元68設為位元1。進而,步驟S4中則重設升壓設定定時器72再予以啟動。Next, in step S2, the MPU 14 resets the MPU clock control bit 66 of the control register 64 to bit 0, and sets the boost clock control bit 68 to bit 1 in step S3. Further, in step S4, the boost setting timer 72 is reset and then activated.
因此,步驟S5中,將停止由AND閘80對MPU14供給時鐘訊號,同時將開始由AND閘82對升壓電路20供給時鐘訊號,而進行升壓電路20之升壓動作。Therefore, in step S5, the clock signal is supplied to the MPU 14 by the AND gate 80, and the clock signal is supplied to the booster circuit 20 by the AND gate 82, and the boosting operation of the booster circuit 20 is performed.
接著,步驟S6中,將監視升壓設定定時器72之定時屆至,若經升壓設定時間T1而定時屆至,則轉移至步驟S7。步驟S7中,則將MPU時鐘控制位元66設為位元1,同時將升壓時鐘控制位元68重設為位元0。Next, in step S6, the timing of monitoring the boost setting timer 72 is reached until the timing of the boost setting time T1 is reached, and the process proceeds to step S7. In step S7, the MPU clock control bit 66 is set to bit 1, and the boost clock control bit 68 is reset to bit 0.
結果,步驟S8中,MPU14將動作而進行發光控制與火災監視控制。步驟S8中一旦結束MPU14之處理,則在步驟S9中將MPU時鐘控制位元66重設為位元0,藉此而停止由AND閘80對MPU14供給時鐘訊號。As a result, in step S8, the MPU 14 operates to perform lighting control and fire monitoring control. When the processing of the MPU 14 is completed in step S8, the MPU clock control bit 66 is reset to the bit 0 in step S9, whereby the supply of the clock signal to the MPU 14 by the AND gate 80 is stopped.
同時,步驟S10中,將重設休眠設定定時器74再予以啟動。藉此,休眠設定定時器之設定時間T2內,將停止對MPU14及升壓電路20供給時鐘訊號,而形成可抑制耗電之休眠狀態。At the same time, in step S10, the reset sleep setting timer 74 is restarted. Thereby, in the set time T2 of the sleep setting timer, the supply of the clock signal to the MPU 14 and the boosting circuit 20 is stopped, and a sleep state in which power consumption can be suppressed is formed.
接著,步驟S11中,一旦判別升壓設定定時器72之定時屆至,則再返回步驟S3,將升壓時鐘控制位元68設為位元1,而由升壓電路20之升壓動作開始重複相同之處理。Next, in step S11, when it is determined that the timing of the boost setting timer 72 has expired, the process returns to step S3, and the boosting clock control bit 68 is set to bit 1, and the boosting operation of the boosting circuit 20 is started. Repeat the same process.
另,若參照第1圖而說明,則在工廠之製造階段之檢查步驟時,對積體電路10由外部連接檢查開關62而加以啟動,即可藉高速時鐘CLK2使MPU14及升壓電路20動作。Further, as will be described with reference to Fig. 1, when the integrated circuit 10 is activated by the external connection check switch 62 at the inspection step of the manufacturing stage of the factory, the MPU 14 and the booster circuit 20 can be operated by the high-speed clock CLK2. .
亦即,在第2圖之控制邏輯電路25中,一旦啟動第1圖之檢查開關62,則控制暫存器64之時鐘選擇位元70將設成諸如位元1。若設成位元1,則多工器30將由時鐘產生電路28所輸出之高速時鐘CLK2與低速時鐘CLK1中,選擇高速時鐘CLK2加以輸出。That is, in the control logic circuit 25 of Fig. 2, once the check switch 62 of Fig. 1 is activated, the clock selection bit 70 of the control register 64 is set to be, for example, bit 1. When the bit 1 is set, the multiplexer 30 selects the high-speed clock CLK2 and the low-speed clock CLK1 output from the clock generating circuit 28, and outputs the high-speed clock CLK2.
因此,檢查步驟中使本實施例之警報器動作時,多工器30所選出之高速時鐘CLK2將供入升壓電路20及MPU14。結果,第3圖之時間圖所示之預定周期T0=10秒將因高速時鐘CLK2之供給而切換為較短之周期,而在較短周期內重複進行升壓動作、發光驅動及火災監視控制之動作。Therefore, when the alarm of this embodiment is operated in the checking step, the high speed clock CLK2 selected by the multiplexer 30 is supplied to the boosting circuit 20 and the MPU 14. As a result, the predetermined period T0=10 seconds shown in the timing chart of FIG. 3 is switched to a shorter period due to the supply of the high-speed clock CLK2, and the boosting operation, the illuminating driving, and the fire monitoring control are repeated in a short period. The action.
此時之動作時間則為對應高速時鐘CLK2對低速時鐘CLK1之一定倍數之較短周期,而可就檢查步驟所進行之各種檢查項目,在短時間內執行各項目而得到檢查結果。The operation time at this time is a short period corresponding to a certain multiple of the high-speed clock CLK2 to the low-speed clock CLK1, and the inspection results can be obtained by executing each item in a short time for various inspection items performed in the inspection step.
檢查步驟結束後,第1圖所示之檢查開關62則由外部連接脫離而開放。卸除檢查開關62而開放後,第2圖之控制暫存器64之時鐘選擇位元70將固定為諸如位元0。因此,多工器30將選擇輸出時鐘產生電路28之低速時鐘CLK1之通常狀態之時鐘訊號。After the inspection step is completed, the inspection switch 62 shown in Fig. 1 is opened by the external connection. After the check switch 62 is removed and opened, the clock select bit 70 of the control register 64 of FIG. 2 will be fixed to, for example, bit 0. Therefore, the multiplexer 30 will select the clock signal of the normal state of the low speed clock CLK1 of the output clock generating circuit 28.
另,上述實施例中,設於第1圖之積體電路10之基準電壓電路24可於內部產出基準電壓,但該基準電壓亦可藉暫存器控制而選擇性地輸入來自外部之外部設定電壓而產生。Further, in the above embodiment, the reference voltage circuit 24 provided in the integrated circuit 10 of Fig. 1 can internally generate the reference voltage, but the reference voltage can also be selectively input from the outside by the register control. Generated by setting the voltage.
又,上述實施例所示之控制邏輯電路25僅屬一例,凡可實現相同功能之電路,則可由適當之電路構成之,進而,不限於邏輯電路,亦可以韌體(控制程式)之執行所致功能之形態實現之。Moreover, the control logic circuit 25 shown in the above embodiment is only an example. Any circuit that can achieve the same function can be configured by a suitable circuit, and further, not limited to the logic circuit, can also be implemented by a firmware (control program). The form of function is realized.
又,本發明不限於上述之實施例,亦包含不損及其目的及優點之適當變形實施。進而,本發明非僅受限於上述實施例所示之數值。Further, the present invention is not limited to the embodiments described above, and includes appropriate modifications without departing from the scope and advantages thereof. Further, the present invention is not limited only by the numerical values shown in the above embodiments.
依據本發明,即便必須升壓發光,亦可進而降低消耗電流延長電池壽命,同時降低零件數量及成本。According to the present invention, even if it is necessary to boost the light emission, the current consumption can be further reduced to extend the battery life while reducing the number of parts and cost.
10...積體電路10. . . Integrated circuit
12...電源電路12. . . Power circuit
14...MPU14. . . MPU
16...火災監視控制部16. . . Fire monitoring and control department
18...發光控制部18. . . Illumination control unit
20...升壓電路20. . . Boost circuit
22...AD轉換電路twenty two. . . AD conversion circuit
24...基準電壓電路twenty four. . . Reference voltage circuit
25...控制邏輯電路25. . . Control logic
26...時鐘電路26. . . Clock circuit
28...時鐘產生電路28. . . Clock generation circuit
30...多工器30. . . Multiplexer
32...受光同步開關32. . . Optical synchronous switch
34...電容器34. . . Capacitor
36...電容器36. . . Capacitor
38...電池38. . . battery
40...電源用電容器40. . . Power supply capacitor
42...升壓保持用電容器42. . . Boost holding capacitor
44...發光驅動開關44. . . Illuminated drive switch
46...LED46. . . led
48...光二極體48. . . Light diode
50...受光放大電路50. . . Light-receiving circuit
52...告警顯示燈52. . . Alarm display light
54...蜂鳴器54. . . buzzer
56...蜂鳴器驅動開關56. . . Buzzer drive switch
58...傳訊電路58. . . Communication circuit
60...傳訊端子60. . . Communication terminal
62...檢查開關62. . . Check switch
64...控制暫存器64. . . Control register
66...MPU時鐘控制位元66. . . MPU clock control bit
68...升壓時鐘控制位元68. . . Boost clock control bit
70...時鐘選擇位元70. . . Clock selection bit
72...升壓設定定時器72. . . Boost setting timer
74...休眠設定定時器74. . . Sleep setting timer
76...OR閘76. . . OR gate
78...反相器78. . . inverter
80...AND閘80. . . AND gate
82...AND閘82. . . AND gate
100...發光驅動電路100. . . Illumination drive circuit
102...電池102. . . battery
104...恒定電壓電路104. . . Constant voltage circuit
106...電容器106. . . Capacitor
108...開關元件108. . . Switching element
110...電容器110. . . Capacitor
111...電阻111. . . resistance
112...電阻112. . . resistance
114...開關元件114. . . Switching element
116...LED116. . . led
118...MPU118. . . MPU
120...光二極體120. . . Light diode
122...受光放大電路122. . . Light-receiving circuit
126...電容器126. . . Capacitor
128...開關元件128. . . Switching element
130...電容器130. . . Capacitor
132...逆流防止用二極體132. . . Countercurrent prevention diode
134...開關元件134. . . Switching element
136...逆流防止用二極體136. . . Countercurrent prevention diode
138...電容器138. . . Capacitor
140...開關元件140. . . Switching element
142...恒定電壓電路142. . . Constant voltage circuit
CLK1...低速時鐘CLK1. . . Low speed clock
CLK2...高速時鐘CLK2. . . High speed clock
S1~S11...步驟S1~S11. . . step
T0...發光周期、一定周期、預定周期T0. . . Luminous period, certain period, predetermined period
T1...升壓設定時間T1. . . Boost set time
T2...休眠設定時間T2. . . Sleep setting time
t1~t7...時刻T1~t7. . . time
第1圖係顯示本發明之警報器之一實施例之電路區塊圖。BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit block diagram showing an embodiment of an alarm device of the present invention.
第2圖係顯示上述實施例之設於積體電路之控制邏輯電路之電路區塊圖。Fig. 2 is a circuit block diagram showing the control logic circuit provided in the integrated circuit of the above embodiment.
第3圖係顯示上述實施例之火災監視控制之時間圖。Fig. 3 is a timing chart showing the fire monitoring control of the above embodiment.
第4圖係上述火災監視控制之流程圖。Figure 4 is a flow chart of the above fire monitoring control.
第5圖係顯示包含習知之恒定電壓電路及發光驅動電路之習知警報器之電路區塊圖。Figure 5 is a circuit block diagram showing a conventional alarm including a conventional constant voltage circuit and an illumination driving circuit.
第6圖係顯示重複充電容量較小之電容器而升壓之習知之警報器之電路區塊圖。Fig. 6 is a circuit block diagram showing a conventional alarm device for boosting a capacitor having a smaller charge capacity.
10...積體電路10. . . Integrated circuit
12...電源電路12. . . Power circuit
14...MPU14. . . MPU
16...火災監視控制部16. . . Fire monitoring and control department
18...發光控制部18. . . Illumination control unit
20...升壓電路20. . . Boost circuit
22...AD轉換電路twenty two. . . AD conversion circuit
24...基準電壓電路twenty four. . . Reference voltage circuit
25...控制邏輯電路25. . . Control logic
26...時鐘電路26. . . Clock circuit
28...時鐘產生電路28. . . Clock generation circuit
30...多工器30. . . Multiplexer
32...受光同步開關32. . . Optical synchronous switch
34...電容器34. . . Capacitor
36...電容器36. . . Capacitor
38...電池38. . . battery
40...電源用電容器40. . . Power supply capacitor
42...升壓保持用電容器42. . . Boost holding capacitor
44...發光驅動開關44. . . Illuminated drive switch
46...LED46. . . led
48...光二極體48. . . Light diode
50...受光放大電路50. . . Light-receiving circuit
52...告警顯示燈52. . . Alarm display light
54...蜂鳴器54. . . buzzer
56...蜂鳴器驅動開關56. . . Buzzer drive switch
58...傳訊電路58. . . Communication circuit
60...傳訊端子60. . . Communication terminal
62...檢查開關62. . . Check switch
CLK1...低速時鐘CLK1. . . Low speed clock
CLK2...高速時鐘CLK2. . . High speed clock
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