JP2007011829A - Alarm unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent inappropriate usage by continuously outputting warning, even when a user exchanges batteries, when a service period for guaranteeing the operation elapses. <P>SOLUTION: When the deterioration of a battery voltage is continuously detected for a predetermined time, a battery capacity monitoring part 66 determines battery failure and outputs the warning. A service period monitoring part 64 stores a passage time 68, from the start of usage in a non-volatile memory 60 so as to output the warning, when determining that the passage time 68 becomes the predetermined service period. When the battery is exchanged for reusing the unit, after a fault warning has been outputted by detecting the end of the service time, the service time monitoring part 64 determines the end of the service period again, based on the passage time 68 held in the nonvolatile memory 60 so as to output the warning. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an alarm device that is installed in a general house or the like and monitors and alarms a fire by battery drive.

  Conventionally, in battery-operated alarms that are installed in ordinary homes and monitor fires, the alarm unit is equipped with a sensor unit and an alarm unit. Compared to the fire alarm system that fires a fire alarm, detects a fire with a fire sensor connected to the sensor line installed in the building or apartment house, and sends a fire signal to the receiver to alarm. Since the alarm can be monitored and alarmed with a single alarm device, it is easy to install and inexpensive, and is expected to be widely used as a fire monitoring device for ordinary houses.

  In recent years, as a result of efforts to reduce power consumption of alarm devices, a long battery life of, for example, five years or more is guaranteed, and no battery replacement is required during that period. When the battery is used for a long time and nears the end of its battery life and a decrease in battery voltage is detected, an alarm for notifying that the battery has run out is issued.

Conventionally, as such a battery exhaustion alarm, in order to reduce the battery exhaustion alarm from night to early morning, a fire alarm device that outputs a battery exhaustion alarm from a speaker after a lapse of a predetermined time after detecting a decrease in battery voltage ( Patent Document 1) or when the battery voltage has dropped below a predetermined voltage, the power lamp is turned on or blinked to notify the battery drop, and the switch operation is performed in this state to prompt battery replacement A battery-type alarm device (Patent Document 2) that outputs a voice message including a message from a speaker is known.
JP 2005-44317 A JP 2004-54356 A

  However, in such a conventional battery-powered alarm device, when the battery life is approached after being used for a long time and a battery exhaustion alarm is issued, the user can replace the battery and perform fire monitoring again. However, dust and dirt are attached to the sensor unit due to long-term use until the battery runs out, and if you replace the battery without using maintenance such as disassembly and cleaning, There is a problem that normal fire monitoring cannot be assured due to the attachment or accumulation of the material.

An object of the present invention is to provide an alarm device that prevents improper use by continuously alarming even when a user replaces a battery when a guaranteed usage period has passed. And

  In order to achieve this object, the present invention is configured as follows. The alarm device of the present invention includes a battery for supplying operating power, a sensor unit for detecting a fire, an inspection switch for confirming an alarm operation, and outputs a warning by judging a fire from a detection signal of the sensor unit. A monitoring control unit that confirms an alarm operation based on an operation signal from a switch, a battery capacity monitoring unit that determines and warns that a battery has run out when a decrease in battery voltage is detected for a predetermined time, and start of use And a usage period monitoring unit that updates and stores the elapsed period from the non-volatile memory, and determines and warns the end of the usage period when the elapsed period reaches a predetermined usage period set in advance. .

  Here, the use period monitoring unit determines the end of the use period again from the elapsed period stored in the nonvolatile memory when the end of the use period is determined and a warning is output and the battery is replaced and reused. Alarm.

  When the battery capacity monitoring unit and the usage period monitoring unit determine that the battery has run out or the usage period has ended, the indicator lamp blinks at a predetermined cycle and outputs an audio message when an operation of the inspection switch is detected. Further, an alarm sound is intermittently output after a predetermined time has elapsed.

The battery capacity monitoring unit and the usage period monitoring unit, when it is determined that the battery has run out or when the usage period has ended, blinks the indicator light at a predetermined cycle and outputs an audio message to notify the operation of the inspection switch. Further, when the operation of the inspection switch is not detected and a predetermined time has elapsed since the detection of the voltage drop, an alarm sound is intermittently output.

  According to the present invention, the elapsed period from the start of use is updated and stored in the non-volatile memory, and the usage period that is an operation guarantee period of, for example, 5 years is monitored. When the user replaces the battery, the elapsed period from the start of use is stored in the non-volatile memory and does not disappear even if the battery is replaced. When the operation is completed, the same alarm as when the low battery level is detected is issued, and it is possible to prevent the dust from being deposited and accumulated due to long-term use and preventing the fire detection operation from being continued without being guaranteed.

In this case, specialized maintenance personnel will either replace the alarm device with a new one, or perform maintenance such as cleaning the alarm device, replace the battery and delete the elapsed time of the non-volatile memory to operate. The reliability of the vessel can be guaranteed.

  FIG. 1 is an explanatory diagram of an embodiment of an alarm device according to the present invention. In FIG. 1, an alarm device 10 of the present invention comprises a main body 11a and a cover 11b, protrudes from the front upper portion of the cover 11b to form a smoke inlet 14, and has a scattered light type smoke detection mechanism therein. Built-in part.

  A two-color LED indicator lamp 15 and a speaker sound opening 16 are provided below the smoke inlet 14. The two-color LED indicator lamp 15 includes a red LED and a green LED, and performs a lighting display necessary in the event of a fire, inspection, failure, or the like. A speaker that outputs an alarm message is built in the speaker sound port 16.

  Further, an inspection operation unit 18 by a ring suspended from a string is provided at the lower part of the cover 11b. If the inspection operation unit 18 is pulled for a certain time during monitoring, an alarm message for confirming the operation is output, and a fire is caused. When an alarm is output at the time of detection, the alarm output can be stopped by continuously pulling the inspection operation unit 18. Further, the inspection operation unit 18 is also used for a release operation for canceling a stop mode that is a low power consumption mode in the present invention.

  The alarm device 10 can be attached to a wall surface of a room in a general house by a mounting bracket 12. The mounting bracket 12 is integrally formed with a hook 26 on the front, and is fixed to the wall surface with two pins. In this state, the hook hole 22 of the mounting portion 20 provided integrally with the upper portion of the main body 11a is hung on the hook 26. Can be attached.

  FIG. 2 is an exploded view of the alarm device 10 of FIG. In FIG. 2, the alarm device 10 of the present invention can be disassembled into a main body 11a and a cover 11b. A printed circuit board 82 including a smoke detector 84 is assembled on the cover 11b side, and the speaker 50 is further assembled.

  A battery 28 is assembled and fixed behind the printed circuit board 82. When the battery 28 is assembled and fixed, its lead terminal is connected to the printed circuit board 82 by soldering. For example, three sponges 86 are arranged inside the main body 11a opposite to the battery 28, and when the cover 11b and the main body 11a are fixed, the battery 28 is pressed so as not to move as a cushioning material.

  A switch fixing contact 52b that constitutes an inspection switch is mounted on the printed circuit board 82, and a switch movable contact piece 52a is attached adjacent thereto by screwing and fixing the screw 88 to the cover 11b of the printed circuit board 82. The switch movable contact piece 52a is connected with a string 18a to which the inspection operation unit 18 is attached. By pulling the string 18a by the inspection operation unit 18, the switch movable contact piece 52a is brought into contact with the switch fixed contact 52b side to check the switch. Can be turned on.

  The main body 11a is assembled to the cover 11b with the printed circuit board 82, the speaker 50, the battery 28, and the sponge 86 interposed therebetween, and is fixed by two screws 88 from the main body 11a side.

  In the alarm device 10 of the present invention having such an assembly / disassembly structure, the battery is assembled and fixed in the assembled state of FIG. 1, and the built-in battery 28 is used unless the alarm device 10 is disassembled. The battery 28 is basically not scheduled to be replaced on the user side.

  FIG. 3 is an exploded view of the smoke detector 84 provided on the printed circuit board 82 of FIG. In FIG. 3, the smoke detector main body 90 is assembled to the printed circuit board 82. A light emitting element 42 and a light receiving element 44 are incorporated in the smoke detector main body 90 with a predetermined scattering angle, and a shield cap 45 for preventing noise is attached to the light receiving element 44 side.

  The space below the smoke detector main body 90 is a smoke detector space, and a smoke detector cover 94 equipped with an insect screen 92 is disposed in the smoke detector space, and a smoke inflow passage opened to the periphery through the insect screen 92 The labyrinth structure that forms is realized.

  For example, dust is deposited on the smoke detector 84 during a period of use of, for example, five years. When the period of use has passed, maintenance for removing dust and dirt from the smoke detector 84 is performed. Necessary. In addition, there is a possibility that the light emitting element 42 and the light receiving element 44 have deteriorated beyond the adjustment range due to long-term use, and the reuse due to maintenance is temporary, and eventually the alarm device needs to be replaced. It is.

  FIG. 4 is a block diagram showing an embodiment of the circuit configuration of the alarm device according to the present invention. In FIG. 4, a battery 28 using a lithium battery or the like is built in the alarm device. As the battery 28, for example, a voltage range of 4.2 volts to 7.0 volts is guaranteed. A power supply line from the battery 28 is supplied to a power supply circuit 30 for CPU, a power supply circuit 32 for audio, and a power supply circuit 34 for sensors, and outputs a predetermined power supply voltage suitable for each load.

  The alarm device is provided with a CPU 36 that functions as a control circuit. A sensor unit 35 is provided for the CPU 36. The sensor unit 35 is provided with a light emitting circuit 38 and a light receiving circuit 40. The light emitting circuit 38 intermittently drives the light emitting element 42 using the LED to emit light in synchronization with the control pulse from the CPU 36, and scatters by the scattered light type smoke detection mechanism, that is, the smoke flowing into the smoke detecting section shown in FIG. The light is received by the light receiving element 44 using a photodiode, amplified by the light receiving circuit 40, and then output to the CPU 36.

  A display circuit 46 is provided for the CPU 36, and the display circuit 46 drives the display of the two-color LED 15 shown in FIG. A voice circuit 48 is provided for the CPU 36 so that a predetermined voice message associated with a fire, inspection, failure or the like is output from the speaker 50.

  Further, a voltage detection circuit 54 is provided for the CPU 36. When the battery voltage from the battery 28 drops below a predetermined voltage, a battery voltage drop detection signal is output to the CPU 36, and a warning is given by determining the battery voltage drop. I try to make it.

  Further, a transfer circuit 55 and a transfer reception circuit 58 are provided for the CPU 36. The transfer circuit 55 outputs a transfer signal to the transfer connector 56 when the CPU 36 detects a fire based on the detection signal from the sensor unit 35. The alarm connector of the present invention installed in another room is interconnected to the message connector 56 by a message signal line.

  Therefore, the transfer signal from the transfer circuit 55 is sent to another alarm device via the transfer connector 56, received by the transfer receiving circuit 58, and causes the CPU 36 to perform a linked alarm. Further, a non-volatile memory 60 using an EEPROM or the like is connected to the CPU 36.

  The CPU 36 is provided with functions of a monitoring control unit 62, a usage period monitoring unit 64, and a battery capacity monitoring unit 66 that are realized by executing the program. The monitoring control unit 62 determines a fire from the light reception detection signal from the light receiving circuit 40 provided in the sensor unit 35, and issues a fire alarm by the display drive of the display circuit 46 and the output of a voice message by the voice circuit 48. Further, when an operation signal is received from the inspection switch 52 in a normal monitoring state, a control function for confirming an alarm operation by the display circuit 46 and the audio circuit 48 is achieved.

  The monitoring control unit 62 also has a switching function between a monitoring mode in which the CPU 36 executes monitoring control and a stop mode in which the monitoring control is stopped to reduce power consumption. Based on this mode switching function, the alarm device 10 Is shipped from the manufacturer side, a stop mode is set in the CPU 36 in a state where power is supplied from the battery 28, and a low power consumption state is set.

  When the CPU 36 is set to the stop mode, the oscillation of the operation clock provided in the CPU 36 is stopped, and the light emission circuit 38 of the sensor unit 35 performs the light emission drive in synchronization with the control pulse from the CPU 36. Stopped and placed in standby state with minimal current consumption.

  Furthermore, the monitoring control unit 62 performs a predetermined switch operation of the inspection switch 52 when the alarm device is installed in the user's dwelling unit in the stop mode setting state of the CPU 36 and starts to be used, for example, continuously switched on for 3 seconds or more. When the operation signal is received, the stop mode that has been set up to that time is canceled, and the monitor mode is switched to the monitor mode that enables the operation of the monitor control.

  Here, the operations of the display circuit 46 and the sound circuit 48 in the alarm device of the present invention are as follows. First, when the CPU 36 receives the operation signal of the inspection switch 52 in the stop mode and starts the operation to be switched to the monitoring mode, the red LED and the green LED of the display circuit 46 blink for a predetermined time, and the audio circuit 48 makes a “beep” sound. Is output a plurality of times, and “soon to start monitoring” is output as a sound a predetermined number of times.

  Thereby, not only the operation start but also the functions of the display circuit 46 and the audio circuit 48 can be confirmed. The display of the display circuit 46 and the output of the audio circuit 48 may be used alone or in combination.

  When a fire is detected, the display circuit 46 repeats the flushing process after the red LED is continuously turned on, and the audio circuit 48 repeats “Woo, it is a fire, it is a fire”.

  On the other hand, at the time of inspection when the inspection switch 52 is operated, the display circuit 46 lights up the red LED, and the sound circuit 48 sounds once after a “pi” sound, “Woooo, it is a fire, it is a fire” End with a “beep” sound.

  The usage period monitoring unit 64 provided in the CPU 36 records an elapsed time 68 from the start of use from the alarm device in a nonvolatile memory 60 using an EEPROM or the like, and the elapsed time 68 is set in a predetermined usage period, for example, an alarm device. It is judged and alarmed that it has reached 5 years to guarantee operation.

  The battery capacity monitoring unit 66 provided in the CPU 36 reads the battery voltage decrease detection signal detected by the voltage detection circuit 54, and when the battery voltage decrease detection signal is detected for a predetermined time, for example, continuously for 16 hours or more, the battery is dead. Judgment and alarm.

  The reason why the battery capacity monitoring unit 66 has a delay time of 16 hours, for example, for determining whether the battery has run out based on the battery voltage drop detection signal is to determine that the battery capacity has fallen quickly due to a temporary voltage drop or temperature fluctuation. This is to prevent this from happening.

  Both the alarm when the usage period monitoring unit 64 determines that the usage period has expired and the alarm when the battery capacity monitoring unit 66 determines that the battery is dead are both required as a fault alarm by the CPU 36 operating the audio circuit 48 from the speaker 50. Output alarm messages and alarm sounds.

  The failure alarm output from the audio circuit 48 and the speaker 50 is to blink the green LED of the two-color LED indicator lamp 15 shown in FIG. If the inspection switch 52 is operated while the two-color LED indicator 15 is blinking, for example, a voice message indicating a failure alarm is output, for example, “Battery has run out. Please contact the dealer.” After outputting the failure warning voice message, the failure warning voice message is automatically output again after a set time of about 12 hours elapses.

  On the other hand, when a failure is determined and the two-color LED indicator lamp 15 blinks in a cycle of about 10 seconds and the inspection switch 52 is not operated for about one week, an alarm sound “beep” is emitted every 50 seconds. It will switch to output and will continue until the battery runs out.

  FIG. 5 is an explanatory view showing the CPU 36 shown in FIG. In FIG. 5, for example, an 8-bit single-chip microcomputer is used as the CPU 36, and a ROM and a RAM are incorporated. Connected to the CPU 36 are a crystal oscillator 75 constituting a clock circuit for transmitting a 32 kHz clock and an crystal oscillator 76 for oscillating an 8 kHz clock as external circuits.

  When the CPU 36 is in a normal monitoring state, the light emitting circuit shown in FIG. 4 is driven to emit light at a cycle of 10 seconds, for example, and fire monitoring is performed. The fire is detected by driving the light emission.

  The CPU 36 has a plurality of general-purpose ports and interrupt ports. In the present invention, mode setting control is performed using one of the general-purpose ports and one of the interrupt ports.

  For example, the CPU 36 can be set to the stop mode by pulling out the stop mode setting terminal 78 from the general-purpose port 68 and grounding the stop mode setting terminal 78 to the L level via the short line 80.

  In setting the stop mode, the L level of the general-purpose port 69 is monitored in the program of the CPU 36, and when the L level of the general-purpose port 69 continues for a predetermined time, the clock oscillation operation by the crystal oscillators 75 and 76 is stopped. When the CPU 36 is switched to the stop mode, the elapsed period 68 recorded in the nonvolatile memory 60 connected to the CPU 36 shown in FIG. 4 is cleared to the initial value.

  The stop mode of the CPU 36 can be canceled by pulling the interrupt port 70 to the L level for a predetermined time or more by turning on the inspection switch 52, and can be switched to the monitoring mode. Further, the CPU 36 is provided with a reset port 74, and a reset signal is added at the time of start-up upon power-on in association with battery installation in the factory stage or user battery replacement during use, so that the CPU 36 can be reset by hardware processing. Executed.

  FIG. 6 is a flowchart of the alarm processing of the present invention in the CPU 36 of FIG. In FIG. 6, when the manufacturer assembles the alarm device 10 of the present invention and puts it in the battery connection state, and inputs a reset signal to the reset port 74 of the CPU 36 shown in FIG. 5, for example, the initial processing of the CPU 36 is performed in step S1. In step S2, the process moves to a normal mode (monitoring mode) in which the function of the monitoring control unit 62 is validated.

  In this state, as shown in the CPU 36 in FIG. 5, the stop mode setting terminal 78 is dropped to the ground using a short line and fixed to the L level. The signal state of the general-purpose port 69 set in step S3 is read, and the stop mode is set in step S4.

  The alarm device of the present invention is shipped to the user in the set state of the stop mode in step S5. After shipment, until the alarm is installed, the CPU 36 determines in step S6 whether or not the interrupt port 70 is at the L level for a predetermined time or more, that is, whether or not the inspection switch 52 is operated for 3 seconds or more, for example. If the inspection switch 52 is at the L level for 3 seconds or longer, the process proceeds to step S6, and the mode is changed to the normal mode (monitoring mode) in which the operation of the monitoring control unit 62 is enabled.

  The transition to the normal mode in step S6 is the use start timing of the alarm device. From this point, the use period monitoring unit 64 shown in the CPU 36 in FIG. 4 obtains the elapsed time using a timer, and the nonvolatile memory 60 updates the timer. The process of recording and saving is started.

  Subsequently, a fire monitoring process is performed in step S7. When a fire is detected in step S8, the process proceeds to step S9, and a fire alarm process is performed. Subsequently, in step S10, a battery capacity monitoring process is performed. If it is determined in step S11 that the battery has run out, the process proceeds to step S14 and a failure alarm process is performed.

  In step S12, the usage period monitoring process is performed. In step S13, when the usage period end is determined, the process proceeds to step S14, and the fault warning process is performed.

  FIG. 7 is a flowchart of the battery capacity monitoring process in step S10 of FIG. In FIG. 7, the battery capacity monitoring process reads the voltage drop detection signal from the voltage detection circuit 54 of FIG. 4 in step S1, and proceeds to step S3 if the voltage drop signal is valid in step S2, and the voltage drop detection signal is It is determined whether or not it continues for a certain time, for example, 16 hours.

  If the voltage drop signal continues for 16 hours, the process proceeds to step S4, where it is determined that the battery has run out, and the determination result is recorded in the nonvolatile memory 60. When the battery capacity monitoring process in FIG. 7 determines that the battery has run out in step S4, a failure alarm process is performed in step S14 of the main routine in FIG.

  FIG. 8 is a flowchart of the usage period monitoring process in step S12 of FIG. In FIG. 8, the usage period monitoring process checks the timer output of, for example, a one-month timer in step S1. If the timer output of the one-month timer is obtained, the process proceeds to step S2, and the elapsed time 68 is read from the nonvolatile memory 60. Then, a new elapsed period is obtained by adding one month, and updated by writing it in the nonvolatile memory 60 again.

  Subsequently, it is determined whether or not the elapsed period updated in step S3 has reached a preset usage period of, for example, five years (60 months). If the usage period has been reached, the usage period end flag is determined in step S4. Is turned on and recorded in the nonvolatile memory 60 for storage. When the usage period end flag is turned on by the usage period monitoring process in FIG. 8, the expiration of the usage period is determined in step S13 of the main routine of FIG. 6, and the failure alarm process based on the determination of the expiration of the usage period in step S14. Will be performed.

  Here, when the alarm is in use, it is determined that the battery has run out by the battery capacity monitoring process shown in FIG. 7, a failure alarm is issued, and the user operates the inspection switch 52 to indicate that the battery has run out. ”, The main body 11a and the cover 11b are disassembled as shown in FIG. 2, and the built-in battery 28 is replaced.

  When the user replaces the battery due to such a failure alarm due to battery exhaustion, a reset signal is applied to the reset port 74 of the CPU 36 shown in FIG. The initial process is performed, the normal mode is entered in step S2, and the fire monitoring operation is started again.

  However, when a failure warning due to battery exhaustion is issued, the usage period is also close to the end, and the usage period monitoring processing unit 64 does not have a one-month timer before the period of time elapses after the battery replacement by the user. The elapsed period 68 of the non-volatile memory 60 that is updated and stored based on the timer output has reached a preset usage period, for example, 5 years (60 months), and it is determined that the usage period has ended. Is issued.

  This is because even if the user replaces the battery, dust and dirt adhere to and accumulate on the smoke detector 84 as shown in FIG. Depending on the situation, the light emitting element 42 and the light receiving element 44 are deteriorated, and an alarm is given that the normal fire monitoring operation cannot be guaranteed.

  For this reason, even if the user replaces the battery with the failure alarm, the same failure alarm is issued after the usage period ends, and the failure alarm continues as long as the battery power is available. Will be contacted for replacement and maintenance of a new alarm device.

  On the other hand, even when the usage period ends before battery exhaustion is determined, the same failure warning as when the battery expires is issued, so the user determines that the battery has expired even when the usage period has expired. An exchange is expected. Also in this case, as in the case of actually determining that the battery has run out, even if the battery is replaced, the non-volatile memory 60 still has an elapsed period 68 exceeding the use period, and the use period monitoring unit 64 remains in the non-volatile memory 60. By comparing the elapsed period 68 with the usage period, the end of the usage period is immediately determined and a failure alarm is issued, and the continuous use of the alarm device in a state where the operation cannot be guaranteed at the end of the usage period. Can be prevented.

  In addition, as the process of the use period monitoring unit 64 in the above embodiment, the end of the use period is determined by obtaining the elapsed period using a one-month timer as shown in the flowchart of FIG. 8, but other than the one-month timer A day timer may be used, and a year timer may be used since the period of use is performed in units of years.

  As for the use period, the use period described in the program for realizing the function of the use period monitoring unit 64 by the CPU 36 can be appropriately set as necessary, for example, 5 years or 7 years.

  In addition, since there is a difference between the period for which the operation is guaranteed and the period during which the alarm can actually be operated, for example, an extension period of 6 months is set for a period of 5 years, and a fault alarm is issued when 5 years and 6 months have passed. You may make it come out. The extension period added to the operation period can be appropriately set as a value on a program that realizes the function of the usage period monitoring processing unit.

  In the above embodiment, the stop mode is set in the CPU 36 at the time of shipment from the manufacturer and the clock oscillation operation is stopped. However, this stop mode is an appropriate means for reducing the power consumption of the alarm device. Can take.

The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

Explanatory drawing of embodiment of the alarm device by this invention Assembly exploded view of FIG. Assembly exploded view of the smoke detector in FIG. The block diagram which showed embodiment of the circuit structure of the alarm device by this invention Explanatory drawing which took out and showed CPU of FIG. Flowchart of alarm device processing by CPU of FIG. Flowchart of battery capacity monitoring process of FIG. Flow chart of usage period monitoring processing of FIG.

Explanation of symbols

10: Alarm 11a: Main body 11b: Cover 12: Mounting bracket 14: Smoke inlet 15: Two-color LED indicator 16: Speaker sound port 18: Inspection operation unit 18a: String 20: Mounting unit 22: Hook hole 26: Hook 28: batteries 30, 32, 34: power supply circuit 35: sensor unit 36: CPU
38: Light emitting circuit 40: Light receiving circuit 42: Light emitting element 44: Light receiving element 45: Shield cap 46: Display circuit 48: Audio circuit 50: Speaker 52: Inspection switch 52a: Switch movable contact piece 52b: Switch fixed contact 54: Voltage detection Circuit 55: Transfer circuit 56: Transfer connector 58: Transfer receiving circuit 60: Non-volatile memory 62: Monitoring control unit 64: Usage period monitoring unit 66: Battery capacity monitoring unit 68: Elapsed time 69: General-purpose port 70: Interrupt Port 74: Reset port 75, 76: Crystal oscillator 78: Stop mode setting terminal 80: Short wire 82: Printed circuit board 84: Smoke detector 86: Sponge 88: Screw 90: Smoke detector main body 92: Insect screen 94: Detection Smoke cover

Claims (4)

A battery for supplying operating power;
A sensor unit for detecting a fire;
An inspection switch to check the alarm action,
A monitoring control unit for judging a fire from a detection signal of the sensor unit and outputting an alarm, and confirming an alarm operation based on an operation signal from the inspection switch;
A battery capacity monitoring unit that determines and warns that the battery has run out when a decrease in the battery voltage is detected for a predetermined time; and
A usage period monitoring unit that updates and stores an elapsed period from the start of use in a nonvolatile memory, and determines and warns the end of the usage period when the elapsed period reaches a predetermined usage period set in advance,
An alarm device characterized by providing.
2. The alarm device according to claim 1, wherein when the battery is replaced and reused after the end of the use period is determined and an alarm is output, the use period monitoring unit is stored in the nonvolatile memory. An alarm device characterized in that the end of the use period is determined again from the elapsed time, and an alarm is given.
2. The sounding device according to claim 1, wherein the battery capacity monitoring unit and the usage period monitoring unit blink the indicator lamp at a predetermined cycle and determine whether the battery has expired or the usage period has ended. An alarm device characterized in that a voice message is output when a switch operation is detected, and an alarm sound is intermittently output after a predetermined time has elapsed.
  2. The alarm device according to claim 1, wherein the battery capacity monitoring unit and the usage period monitoring unit blink the indicator lamp at a predetermined cycle and determine the inspection switch when it is determined that the battery has run out or the usage period has ended. When an operation is detected, a voice message is output for notification, and further, an alarm sound is intermittently output when a predetermined time has elapsed since the detection switch operation was not detected and the voltage drop was detected. An alarm device.

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