JP4051626B2 - Fire alarm - Google Patents

Description

  The present invention relates to a fire alarm, and more particularly to a residential fire alarm using a battery.

  Residential fire alarms often use batteries as a power source. In general, a fire alarm using this battery is provided with a voltage drop alarm circuit, which monitors the voltage of the battery and sounds a built-in buzzer when the voltage drops to a predetermined value. Alarm.

  By the way, the voltage of the battery as a power source changes due to a temperature change. For example, the battery voltage decreases as the room temperature decreases. For this reason, if the built-in buzzer is sounded immediately when the voltage drops to the specified value, it will sound a low battery warning especially in the winter from the coldest night to the early morning. I want to avoid it if possible.

  Therefore, when there is no need for a voltage drop alarm such as during sleep, the time limit timer is operated for a predetermined time, and during that time, the battery and the voltage drop alarm circuit are shut off, so that the battery low alarm can be used during sleep. Has been proposed (for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-54885

  However, if the time limit timer is operated for a predetermined time and the battery is disconnected from the voltage drop alarm circuit during that time, the power supply voltage drop is detected during the time limit timer operation. There was no problem. Therefore, if the time limit timer is operated at night every day, the discovery of the power supply voltage drop is delayed, and in the worst case, the fire detection circuit may not function normally at night.

  The technical problem of the present invention is to reduce the sound of a battery exhaustion alarm from night to early morning, which is very annoying for residents, and furthermore, power supply voltage monitoring can be performed from night to early morning, The purpose is to make it possible to detect a power supply voltage drop early.

(1) fire alarm according to the present invention includes a power supply, and a speaker, performs power supply voltage monitoring, when the supply voltage drops below a first voltage value to detect a power supply voltage drop, when detecting the power supply voltage drop Monitors the power supply voltage continuously for a predetermined time from the detection point , and detects a power supply voltage drop when the power supply voltage becomes lower than the second voltage value set higher than the first voltage value for a predetermined time. and, upon detecting a power supply voltage drop, in which the battery power alarm and a control means for outputting from the speaker.
(2) The fire alarm device according to the present invention monitors the power supply, the speaker, and the power supply voltage, detects a power supply voltage drop when the power supply voltage falls below the first voltage value, and detects a power supply voltage drop. Monitors the power supply voltage after a lapse of a predetermined time from the detection time, detects a power supply voltage drop when the power supply voltage falls below the second voltage value set higher than the first voltage value, and again drops the power supply voltage And detecting means for outputting a battery exhaustion alarm from the speaker .

( 3 ) In the fire alarm device according to the present invention, the control means does not monitor the power supply voltage while maintaining that the power supply voltage has dropped after outputting a battery exhaustion alarm after a predetermined time has elapsed.
( 4 ) The fire alarm device according to the present invention further includes a test switch, and the control means detects that the power supply voltage has dropped when the test switch is operated before the predetermined time has elapsed. Is output.
( 5 ) In the fire alarm device according to the present invention, the control means monitors the power supply voltage when starting the fire alarm device, and immediately outputs a battery exhaustion alarm when a power supply voltage drop is detected a plurality of times. Let

(1) According to the fire alarm device of the present invention, the power supply voltage is monitored , the power supply voltage drop is detected when the power supply voltage falls below the first voltage value, and the power supply voltage drop is detected when detected. The power supply voltage is continuously monitored for a predetermined time from the time point, and when the power supply voltage becomes lower than the second voltage value set higher than the first voltage value for a predetermined time, the power supply voltage drop is detected, When a drop is detected, a battery exhaustion alarm is output, so the power supply voltage drops from night to early morning due to a decrease in room temperature. It will be output later. Therefore, the output of the battery exhaustion warning from night to early morning is reduced, and the power supply voltage is monitored from night to early morning when the power supply voltage is likely to drop, so that the power supply voltage drop can be detected early. In addition, a battery exhaustion alarm is not output due to a temporary power supply voltage drop, and the reliability is high. Further, in anticipation of an increase in the room temperature when a predetermined time has elapsed, the threshold that is the second voltage value at the time of the subsequent power supply voltage monitoring is set higher than the threshold that is the first voltage value at the time of the first power supply voltage monitoring. By doing so (in other words, by providing hysteresis characteristics for detection of a drop in power supply voltage), it is possible to strictly check for defective power supplies (batteries). In addition, the first voltage value for issuing a battery exhaustion alarm is a value that enables fire detection for a predetermined time after the alarm, and even if the alarm is delayed until morning or daytime after the predetermined time has elapsed, Fire detection is not affected.
(2) The fire alarm device according to the present invention performs power supply voltage monitoring, detects a power supply voltage drop when the power supply voltage falls below the first voltage value, and if a power supply voltage drop is detected, The power supply voltage is monitored after a predetermined time has elapsed. When the power supply voltage falls below the second voltage value set higher than the first voltage value, the power supply voltage drop is detected. When the power supply voltage drop is detected again, the battery runs out. Since the alarm is output , the power supply voltage decreases from night to early morning due to a decrease in the room temperature, and even if a power supply voltage decrease is detected, the battery exhaustion alarm is output after a predetermined time has elapsed. As a result, the output of a battery exhaustion warning from night to early morning is reduced. In addition, a battery exhaustion alarm is not output due to a temporary power supply voltage drop, and the reliability is high. When power supply voltage drop is detected, power supply voltage monitoring is not performed until a predetermined time elapses, so the number of times power is supplied to the power supply monitoring circuit is reduced, power consumption is reduced, and power supply voltage drop is suppressed. And the output time of the battery exhaustion alarm can be maximized. Further, in anticipation of an increase in the room temperature when a predetermined time has elapsed, the threshold that is the second voltage value at the time of the subsequent power supply voltage monitoring is set higher than the threshold that is the first voltage value at the time of the first power supply voltage monitoring. By doing so (in other words, by providing hysteresis characteristics for detection of a drop in power supply voltage), it is possible to strictly check for defective power supplies (batteries). In addition, the first voltage value for issuing a battery exhaustion alarm is a value that enables fire detection for a predetermined time after the alarm, and even if the alarm is delayed until morning or daytime after the predetermined time has elapsed, Fire detection is not affected.

( 3 ) According to the fire alarm device of the present invention, after a battery exhaustion alarm is output after a predetermined time has elapsed, power supply voltage monitoring is not performed while maintaining that the power supply voltage has dropped. Power is not supplied to the monitoring circuit, power consumption is reduced, power supply voltage drop can be suppressed, and the output time of a battery exhaustion alarm can be maximized.
( 4 ) According to the fire alarm device of the present invention, when the test switch is operated before the predetermined time elapses, a battery low alarm is output when a drop in the power supply voltage is detected. Even before the elapse of time, it is possible to confirm whether the power supply voltage has dropped.
( 5 ) According to the fire alarm device of the present invention, the power supply voltage is monitored at the start-up of the fire alarm device, and if a power supply voltage drop is detected continuously several times, a battery exhaustion alarm is output immediately. Since a battery exhaustion alarm is output to a power supply (battery) that is a defective product from the beginning without delaying a predetermined time, a power supply (battery) that is a defective product can be found quickly from the beginning. Therefore, it is possible to avoid a fear that the fire alarm does not operate normally within a predetermined time of delay.

Embodiment 1 FIG.
Figure 1 is a block diagram showing the configuration of a fire alarm according to Embodiment 1 of implementation, FIGS. 2 to 7 are flowcharts showing the operation.

  In the figure, 1 is a power source for driving various circuits and devices, for example, a 6V battery, 2 is a power supply monitoring circuit that monitors the voltage of the battery 1, and 3 is a power supply monitoring circuit 2 that is closed when the power supply 1 is monitored. The power supply switch circuit 4 is a constant voltage circuit, and has a function of supplying a constant voltage (for example, 3 V) that does not vary depending on the voltage of the battery 1 to each of the circuits from here on. Reference numeral 5 denotes a thermal fire detection unit including a thermistor 6 and a resistor 7. Moreover, the fire detection part 5 is utilized also for disconnection detection. Incidentally, there are two types of thermistors 6: a type in which the resistance value increases as the temperature a rises and a type in which the resistance value decreases as the temperature b increases. Here, the b type is used, and the b type thermistor. If the detected voltage value is equal to or greater than a fire detection threshold (for example, 2 V), it is determined that a fire has occurred.

  Reference numeral 8 denotes a switch (corresponding to a test switch of the present invention) in which a current limiting resistor 9 is connected in series. When the switch 8 is turned on, an abnormality monitoring result is output from the speaker 11 and in the event of a fire. In this case, the fire phrase (fire sound) is stopped for a predetermined time, for example, 5 minutes.

  Reference numeral 12 denotes a microcomputer (hereinafter referred to as a microcomputer), which includes a storage unit 13 and a timer unit 14 for performing various processing operations. A voice synthesis circuit 15 has a function of outputting voices of various phrases from the speaker 11 in accordance with instructions from the microcomputer 12. Reference numeral 16 denotes a switch circuit for supplying power to the voice synthesis circuit 15 that is closed when the voice synthesis circuit 15 outputs voice.

  More specifically, in the storage unit 13 of the microcomputer 12, a fire flag 13a that is set when a fire is detected, a disconnection flag 13b that is set when a disconnection is detected, and the voltage of the battery 1 is equal to or lower than a predetermined voltage value. For example, a voltage drop detection flag 13c that is set when it is detected that the voltage has dropped to 5 V or less, and that the voltage of the battery 1 has been lowered to a predetermined voltage value or less, for example, 5 V or less, is detected for a predetermined time, for example, 5 hours. The voltage drop confirmation flag 13d that is set when the fire is detected, and the fire sound stop flag 13e that is set when the switch 8 is detected to be on when a fire is detected are stored. Based on the sound output command signal LM for outputting a sound to the speech synthesis circuit 15, the selection signal L1, L2, L3 of various phrases It is adapted to output with a Re of the selection signal. Here, the selection signal L1 is a signal for selecting a fire sound “Hugh, Hugh, Hugh, Fire. Fire,” and the selection signal L2 is an abnormal sound “flowing every hour when the thermistor is disconnected or when the battery voltage drops”. The alarm signal is abnormal. Replace it. The selection signal L3 is a signal for selecting a beep that sounds every 40 seconds when the thermistor is disconnected or when the battery voltage drops. The signal LB is a signal (back signal) notifying the microcomputer 12 that the commanded selection sound has been output from the voice synthesis circuit 15. At the time of this sound output, the microcomputer 12 turns on the switch circuit 16 to supply power to the speech synthesis circuit 15, and after outputting the sound, turns off the switch circuit 16 to stop the power supply to the speech synthesis circuit 15. , Reducing power consumption. The power supply monitoring circuit 2 and the microcomputer 12 correspond to the control means of the present invention. Similarly, during the battery voltage drop monitoring process, the microcomputer 12 turns on the switch circuit 3 to supply power to the power supply monitoring circuit 2 and inputs the voltage of the battery 1 from the power supply monitoring circuit 2. The power consumption is reduced by turning off and stopping the power supply to the power monitoring circuit 2.

  Next, the operation of the fire alarm device of the present embodiment will be described with reference to FIG. 1 based on FIGS. First, in FIG. 2 showing the main flow chart, when the battery 1 is set (loaded) and the power is turned on, all the flags 13a to 13e of the microcomputer 12 in FIG. The symbol notation is omitted) (step 1), and all counters of each timer of the timer unit 14 are cleared (step 2). Next, in step 3, a switch input determination process is performed to determine whether or not there is an input from the switch 8. In step 4, a fire monitoring process is performed to determine whether or not a fire has occurred. A disconnection monitoring process for determining whether or not there is a disconnection is performed, a battery voltage drop monitoring process is performed in step 6, and then a monitoring result output process is performed in step 7, and then the switch input in step 3 is performed. Return to determination processing. And the process of step 3-step 7 is repeated.

In the switch input determination process (step 3), as shown in FIG. 3, first, it is determined whether or not there is an input from the switch 8 (whether or not the switch 8 is closed) (step 311). (That is, proceed to the fire monitoring process in step 4 of the main flowchart of FIG. 2).
If it is determined in step 311 that there is an input from the switch 8, then it is checked whether or not the fire flag is set (step 312). If the fire flag is set, a fire sound indicating a fire state is displayed. Since the phrase has been output, a fire sound stop flag for stopping the fire sound phrase for 5 minutes, for example, is set (step 313), and the process is terminated (proceed to step 4 in the main flowchart).
If it is determined in step 312 that the fire flag is not set, then it is checked whether or not the disconnection flag is set (step 314). If the disconnection flag is set, the abnormal voice “alarm” is set. The device is abnormal. Please replace it. ”The processing for outputting once is performed (step 315), and the processing ends (proceed to step 4 of the main flowchart).
If it is determined in step 314 that the disconnection flag is not set, then it is checked whether or not the voltage drop confirmation flag is set (step 316). If the voltage drop confirmation flag is set, step The process jumps to 315 to perform processing for outputting an abnormal sound “Alarm is abnormal. Please replace.” Once, and the processing ends (proceed to Step 4 in the main flowchart).
If it is determined in step 316 that the voltage drop confirmation flag has not been set, then it is checked whether or not the voltage drop detection flag is set (step 317), and the voltage drop detection flag is set. If so, the process jumps to step 315 to perform processing for outputting the abnormal sound “alarm is abnormal. Please replace.” Once, and the processing is terminated (proceed to step 4 in the main flowchart).
If it is determined in step 317 that the voltage drop detection flag is not set, it is determined that the fire alarm is in a normal state, and the fire sound “Hugh, Hugh, After processing for outputting “Hugh, fire. Fire is fired” once (step 318), the process returns to step 311. That is, in the case of normality, the normality can be notified as many times as there is an input from the switch 8. Therefore, if it is determined that the fire alarm is in a normal state instead of a fire state, a sound indicating that it is normal is output, and it can be confirmed that the sound is normal by the sound output, so that it is determined as an abnormal state. Then, since a sound indicating abnormality is output, it can be confirmed that the sound is abnormal by the sound output. In addition, you may vary the audio | voice phrase which shows abnormality for every abnormality. Note that the abnormal voice output requires that any one of the disconnection flag, the voltage drop confirmation flag, and the voltage drop detection flag is set, but if you do not want to output the abnormal voice output before the power supply voltage drop is confirmed The condition of the voltage drop detection flag (step 317) may be deleted.

As shown in FIG. 4, the fire monitoring process (step 4) first takes the voltage value of the thermistor 6 and compares this detected voltage value with a fire detection threshold (eg, 2V), that is, the detected voltage value. It is determined whether or not a fire has occurred (step 411) by checking whether or not the fire has exceeded the fire detection threshold (2V). If it is determined that no fire has occurred, the fire flag is cleared. Then, the 5-minute timer for the fire sound stop flag is cleared (step 413), the fire sound stop flag is also cleared (step 414), and the process ends (that is, in the main flowchart of FIG. 2). Proceed with disconnection monitoring processing in step 5).
If it is determined in step 411 that a fire has occurred, after setting the fire flag (step 415), it is checked whether the fire sound stop flag is set (step 416) and the fire sound is stopped. If the flag is not set, the process jumps to step 413, and if it is determined in step 416 that the fire sound stop flag is set, the fire sound should not be sounded, so the timer is counted for 5 minutes ( Step 417) Next, it is checked whether or not 5 minutes have passed (Step 418), and if 5 minutes have not passed, the processing is terminated (Proceed to Step 5 of the main flowchart).
If it is determined in step 418 that 5 minutes have elapsed, it is necessary to be able to emit a fire sound, so the process proceeds to step 413, the timer is cleared for 5 minutes, and the fire sound stop flag is cleared in step 414. Then, the process ends (proceed to step 5 of the main flowchart).

As shown in FIG. 5, the disconnection monitoring process (step 5) first checks whether or not the fire flag is set (step 511), and if the fire flag is set, the fire detection is prioritized. The process ends (that is, the battery voltage drop monitoring process in step 6 of the main flowchart of FIG. 2 is performed).
If it is determined in step 511 that the fire flag is not set, it is next determined whether or not the voltage value of the thermistor 6 is taken in and disconnected (step 512). That is, it is determined whether or not the output of the thermistor 6 is 0V, and it is determined whether or not it is disconnected. If it is not disconnected, the disconnection flag is cleared (step 513), and the process ends (steps of the main flowchart). 6).
If it is determined in step 512 that the circuit is disconnected, a disconnection flag is set (step 514), and the process ends (proceed to step 6 in the main flowchart).

As shown in FIG. 6, the battery voltage drop monitoring process (step 6) first checks whether or not the fire flag is set (step 611). If the fire flag is set, the disconnection monitoring process described above is performed. Similarly, since fire detection has priority, the processing is terminated (that is, the monitoring result output processing in step 7 of the main flowchart in FIG. 2 is performed).
On the other hand, if it is determined in step 611 that the fire flag is not set, whether or not the battery voltage drop confirmation flag is set next is checked (step 612), and the battery voltage drop confirmation flag is set. For example, since the battery voltage is held in that state, the subsequent battery voltage drop monitoring process is not performed, and the process ends (proceed to step 7 in the main flowchart).
If it is determined in step 612 that the battery voltage decrease confirmation flag is not set, whether or not the voltage of the battery 1 has decreased to a predetermined voltage value or less (in this case, a decrease level or less, for example, 5 V or less). (Step 613) If the voltage is not lower than 5V, it is normal, so the 5-hour timer for the battery voltage drop confirmation flag is cleared (step 614), and then the voltage drop detection flag is cleared. (Step 615), the process is terminated (Proceed to Step 7 of the main flowchart).
If it is determined in step 613 that the voltage of the battery 1 has dropped to 5 V or less, the voltage drop detection flag is set (step 616), and then the first or second monitoring process after turning on the power. Whether the monitoring process is the third or subsequent monitoring process (step 617), and if it is the first or second monitoring process, it is checked whether a voltage drop is detected twice consecutively (step 618). If it is the first monitoring process or the like, the process ends (proceed to step 7 in the main flowchart).
If it is determined in step 618 that a voltage drop has been detected twice consecutively, the battery voltage drop confirmation flag is set (step 619), and the process ends (proceeds to step 7 in the main flowchart).
If it is determined in step 617 that the monitoring process is not the first or second monitoring process after the power is turned on but the third and subsequent monitoring processes, the 5-hour timer starts counting (step 620). Next, it is checked whether or not 5 hours have passed (step 621). If 5 hours have not passed, the process is terminated (proceeds to step 7 in the main flowchart). The voltage drop confirmation flag is set and the process ends.
That is, there is a case where a defective battery is attached to the fire alarm device itself and the battery voltage is lowered from the beginning. In that case, since an alarm is issued after 5 hours, fire detection may not be performed normally during that time. Therefore, it is desirable that a voltage drop can be detected immediately if the product is defective at first. Steps 617 to 619 described above are provided so that such a defective product can be checked in the first stage.

As shown in FIG. 7, the monitoring result output process (step 7) first checks whether or not the fire flag is set (step 711). If the fire flag is set, then the fire sound stop flag is set. Check whether it is set (step 712). If the fire sound stop flag is not set, a fire has occurred, so the fire sound “Hugh, Hugh, Hugh. Fire is fire.” Is output. Then, the process ends (that is, the process returns to the switch input determination process in step 3 of the main flowchart of FIG. 2).
If it is determined in step 711 that the fire flag is not set, the process proceeds to step 714.
Further, even if it is determined in step 711 that the fire flag is set, even if it is determined in step 712 that the fire sound stop flag is set, the process proceeds to step 714.
In step 714, it is determined whether or not the disconnection flag is set. If it is determined in step 714 that the disconnection flag is not set, then it is checked whether or not the battery voltage drop confirmation flag is set (step 715). If the battery voltage drop confirmation flag is not set as well. Then, the process ends (returns to step 3 of the main flowchart).
If it is determined in step 714 that the disconnection flag is set, or if it is determined in step 715 that the battery voltage decrease confirmation flag is set, the process proceeds to step 716.
In step 716, it is checked whether or not the count of the hourly timer for abnormal sound output has been started. If it is determined in step 716 that the 1-hour timer has not started, processing is performed to output an abnormal sound “alarm is abnormal. Replace it” twice (step 717). . That is, after inputting the sound output command signal LM and the selection signal L2 from the microcomputer 12 to the voice synthesis circuit 15 and outputting the abnormal sound once, after receiving the back signal LB, the microcomputer 12 again at intervals of 3 seconds, for example. The voice output command signal LM and the selection signal L2 are input to the voice synthesis circuit 15 to output abnormal voice. Next, the timer is counted for 1 hour (step 718).
On the other hand, if it is determined in step 716 that the one-hour timer has been started, the process jumps to step 718 to continue the one-hour timer. Next, it is checked whether or not 1 hour has passed (step 719). If 1 hour has not passed, counting of a 40 second timer for alarm sound output is started (step 720). Next, it is checked whether or not 40 seconds have passed (step 721). If 40 seconds have not passed, the process is terminated (return to step 3 in the main flowchart), and if 40 seconds have passed, the counter of the timer for 40 seconds is set. After clearing (step 722), an alarm sound “beep” is output (step 723), and the process is terminated (returning to step 3 of the main flowchart).
If it is determined in step 719 that one hour has elapsed, the abnormal sound “Alarm is abnormal. Replace it” is output twice as in step 717 (step 724). The counter of the one hour timer is cleared (step 725), and the process ends (returns to step 3 of the main flowchart).

As described above, in the fire alarm device according to the first embodiment, when the power supply voltage is monitored and a drop in the power supply voltage is detected, a battery exhaustion alarm is output after a predetermined time (for example, 5 hours) has elapsed from the detection time point. As a result, the power supply voltage decreases from night to early morning due to a decrease in the room temperature, and even if a power supply voltage decrease is detected, the battery exhaustion alarm is output after a predetermined time has elapsed. Therefore, the output of the battery exhaustion warning from night to early morning is reduced, and the power supply voltage is monitored from night to early morning when the power supply voltage is likely to drop, so that the power supply voltage drop can be detected early. Note that the predetermined voltage value for issuing a battery exhaustion alarm is a value (for example, 5 V) that enables fire detection for a predetermined time after the alarm, and delays the alarm until, for example, morning or daytime after the predetermined time has elapsed. Does not affect fire detection.

  In addition, when a power supply voltage drop is detected by monitoring the power supply voltage, if a power supply voltage drop is further detected for a predetermined time (for example, 5 hours), a battery exhaustion alarm is output. The battery exhaustion alarm is not output due to the decrease, and the reliability can be improved.

  In addition, when the test switch 8 is operated before the predetermined time has elapsed, a battery exhaustion alarm is output when a drop in the power supply voltage is detected. Therefore, even before the predetermined time (for example, 5 hours) has elapsed, It is possible to check whether the voltage has dropped.

  Also, the power supply voltage is monitored when the fire alarm is started up, and if a power supply voltage drop is detected multiple times in succession, a battery exhaustion alarm is output immediately. ), A battery exhaustion alarm can be output without delaying for a predetermined time, and a defective power supply (battery) can be quickly found from the beginning. Therefore, it is possible to avoid the fear that the fire alarm does not operate normally within a predetermined delay time (for example, 5 hours).

In addition, after the battery exhaustion alarm is output after the lapse of a predetermined time, power supply voltage monitoring is not performed while maintaining that the power supply voltage has dropped, so power is not supplied to the power supply monitoring circuit after that, and power consumption is reduced. The power supply voltage drop can be suppressed, and the output time of the battery exhaustion alarm can be maximized.
Note that the abnormal sound output at the time of monitoring result output is repeated twice because the resident cannot recognize the sound content for the unexpected sound output if it is only once. By doing so, the resident can surely recognize the audio content.
Moreover, in the fire alarm device of this Embodiment 1, another effect as shown below can also be show | played.

  That is, since the thermistor 6 serving as a sensor unit is automatically self-diagnosed and the abnormality monitoring result is output by voice, it can be clearly distinguished from the buzzer sound of other home appliances. In addition, when the abnormality monitoring result is abnormal, a sound indicating abnormality is output, so that it is easy to understand whether it is normal or abnormal.

  Further, since the sound corresponding to the abnormality monitoring result is output when the switch 8 for performing the test is operated, that is, when the abnormality monitoring result is abnormal, the sound indicating that it is abnormal. Since the operator (for example, a resident) wants to grasp the abnormality monitoring result, the operator can surely know the result and can also know by voice, so that it is easy to understand. .

  Further, if the audio output is continued, the power consumption is large and the power supply voltage is drastically reduced. Therefore, the abnormal audio output is sounded intermittently every second predetermined time, and every first predetermined time during the audio output. The alarm sound “beep”, which consumes less power than voice output, is output intermittently every 40 seconds. In other words, when the abnormality monitoring result is abnormal, after outputting the sound indicating the abnormality first, the alarm sound is output with a short period, and the period longer than the period of the alarm sound (40 seconds) ( 1 hour), a sound indicating that the abnormality is abnormal is output, so that the resident can surely know that the abnormality monitoring result is abnormal, and the power supply voltage can be reduced by reducing power consumption. . And the output time of an abnormality monitoring result can be lengthened to the maximum. This reduction in power consumption is further reduced by intermittent sounding of sound output and intermittent sounding of alarm sound between sound outputs.

In addition, when the resident notices that the abnormality monitoring result is abnormal with a buzzer sound, the test switch 8 is operated to output a sound indicating abnormality. Residents can quickly and surely know that is abnormal.
Note that the abnormal sound output at the time of monitoring result output is repeated twice because the resident cannot recognize the sound content in response to the unexpected sound output if only once. By doing so, the resident can surely recognize the audio content.

Embodiment 2. FIG.
FIG. 8 is a flowchart showing the battery voltage drop monitoring processing operation of the fire alarm device according to the second embodiment of the present invention, and other switch input determination processing operation, fire monitoring processing operation, disconnection monitoring processing operation, monitoring result Since output processing, hardware configuration, and the like are basically the same as those of the first embodiment, description thereof is omitted. In the description, the block diagram of FIG. 1 and the main flowchart of FIG. 2 will be referred to, and the description will focus on the differences from the battery voltage drop monitoring processing operation of FIG.

The fire alarm of the second embodiment is slightly different from that of the first embodiment in the battery voltage drop monitoring process. In the second embodiment, as shown in FIG. 8, first, it is determined whether or not the fire flag is set (step 811). If the fire flag is not set, the battery voltage drop confirmation flag is set. If the battery voltage drop confirmation flag is not set, it is checked whether the voltage drop detection flag is set (step 813). If the voltage drop detection flag is not set in step 813, the voltage of the battery 1 has dropped to a predetermined voltage value, that is, the first voltage value or lower (in this case, the lower level, for example, 5 V or lower). (Step 814) If the voltage has not dropped below 5V, it is normal, so the voltage drop detection flag is cleared (Step 815), and the battery voltage drop confirmation flag 5-hour timer is cleared. (Step 816), and the process is terminated (Proceed to Step 7 of the main flowchart).
If it is determined in step 814 that the voltage of the battery 1 has dropped to 5 V or less, the voltage drop detection flag is set (step 817), and then the first or second monitoring process after turning on the power. Whether the monitoring process is the third or subsequent monitoring process (step 818), if it is the first monitoring process or the second monitoring process, it is checked whether the voltage drop is detected twice consecutively (step 819). If it is the first monitoring process or the like, the process ends (proceed to step 7 in the main flowchart).
If it is determined in step 819 that a voltage drop has been detected twice consecutively, the battery voltage drop confirmation flag is set (step 820), and the process ends (proceeds to step 7 in the main flowchart).
If it is determined in step 813 that the voltage drop detection flag is set, the voltage of the battery 1 is set to a normal level as a predetermined voltage value, that is, a second voltage value (for example, 5.2 V or more). (Step 823), if the voltage of the battery 1 is at a normal level (5.2 V or more), the voltage drop detection flag is cleared (step 815), and further, a battery voltage drop confirmation flag is set. The 5-hour timer is cleared (step 816), and the process ends (proceeds to step 7 in the main flowchart).
If it is determined in step 823 that the voltage of the battery 1 is not at a normal level, the process jumps to step 818, and in step 818, the first or second monitoring process after power-on is performed, and the third or subsequent monitoring process is performed. If it is determined that there is, a 5-hour timer starts counting (step 821). Next, it is checked whether or not 5 hours have passed (step 822). If 5 hours have not passed, the process is terminated (proceeds to step 7 in the main flowchart). The voltage drop confirmation flag is set and the process ends.

As described above, in the fire alarm device according to the second embodiment, the temperature rise in the room after a predetermined time (for example, 5 hours) is anticipated, and the first power supply voltage monitoring after the first detection of the power supply voltage drop is detected . The threshold value that is the voltage value of 2 is set to be higher (for example, 5.2 V or more) than the threshold value that is the first voltage value (for example, 5 V) at the time of the initial power supply voltage monitoring (for example, 5.2 V or more). In other words, since the hysteresis characteristic is given to the detection of the power supply voltage drop), it is possible to strictly check the defective power supply (battery).

Embodiment 3 FIG.
Figure 9 is a flow chart showing the operation of the battery voltage drop monitoring process fire alarm according to the third implementation, the other switch input determination processing operation, fire monitoring processing operation, disconnection monitor processing operation, the monitoring result output process Since the hardware configuration and the like are basically the same as those of the first embodiment, description thereof is omitted. In this case as well, the block diagram of FIG. 1 and the main flowchart of FIG. 2 are referred to, and the difference from the battery voltage drop monitoring processing operation of FIG. 6 will be mainly described.

The fire alarm of the third embodiment is slightly different from that of the first embodiment in the battery voltage drop monitoring process. In the third embodiment, as shown in FIG. 9, it is first checked whether or not the fire flag is set (step 911). If the fire flag is not set, the battery voltage drop confirmation flag is set. If the battery voltage drop confirmation flag is not set, it is checked whether the voltage drop detection flag is set (step 913). If the voltage drop detection flag is not set in step 913, it is checked whether or not the voltage of the battery 1 has dropped to a predetermined voltage value or lower (in this case, lower level, for example, 5V or lower) (step 913). 914) If the voltage has not decreased to 5 V or less, the process is terminated (proceeds to step 7 in the main flowchart).
If it is determined in step 914 that the voltage of the battery 1 has dropped to 5 V or less, the voltage drop detection flag is set (step 915), and then the first or second monitoring process after the power is turned on. Whether the monitoring process is the third or subsequent monitoring process (step 916), and if it is the first monitoring process or the second monitoring process, it is checked whether a voltage drop is detected twice consecutively (step 917). If it is the first monitoring process or the like, the process ends (proceed to step 7 in the main flowchart).
If it is determined in step 917 that a voltage drop has been detected twice consecutively, the battery voltage drop confirmation flag is set (step 918), and the process ends (proceeds to step 7 in the main flowchart).
If it is determined in step 913 that the voltage drop detection flag is set, the process proceeds to step 916. In step 916, the first or second monitoring process is not performed after the power is turned on. If it is determined that the process is being performed, the 5-hour timer for the battery voltage drop confirmation flag is started (step 919). Next, it is checked whether or not 5 hours have passed (step 920). If 5 hours have not passed, the process is terminated (proceeds to step 7 in the main flowchart), and if 5 hours have passed, the 5-hour timer is cleared. (Step 921), it is checked again whether the voltage of the battery 1 has dropped to 5 V or less (Step 922). If the voltage of the battery 1 has not dropped to 5 V or less, it is normal and the voltage drop is being detected. The flag is cleared (step 923), and the process ends (proceed to step 7 in the main flowchart).
If it is determined again in step 922 that the voltage of the battery 1 has decreased to 5 V or less, the battery voltage decrease confirmation flag is set (step 918), and the process ends (proceed to step 7 in the main flowchart). ).

  As described above, in the fire alarm device according to the third embodiment, when the power supply voltage monitoring is performed and the power supply voltage drop is detected, the power supply voltage monitoring is continued and the power supply is monitored again after a predetermined time (for example, 5 hours). When a drop in power supply voltage is detected and a drop in power supply voltage is detected, an out-of-battery alarm is output, so that no out-of-battery alarm is output due to a temporary drop in power supply voltage, making it easy to ensure reliability. Become. Also, when the power supply voltage drop is detected, the power supply voltage is not detected (judged) until the predetermined time has elapsed, so the number of times power is supplied to the power monitoring circuit is reduced, power consumption is reduced, The voltage drop can be suppressed, and the output time of the battery exhaustion alarm can be maximized.

Embodiment 4 FIG.
FIG. 10 is a flowchart showing the operation of the battery voltage drop monitoring process of the fire alarm device according to the fourth embodiment of the present invention. Other switch input determination processing operation, fire monitoring processing operation, disconnection monitoring processing operation, monitoring result Since output processing, hardware configuration, and the like are basically the same as those of the first embodiment, description thereof is omitted. In this description as well, the block diagram of FIG. 1 and the main flowchart of FIG. 2 are referred to, and the difference from the battery voltage drop monitoring processing operation of the third embodiment (FIG. 9) is mainly described. explain.

As shown in step 122 in FIG. 10, the fire alarm device according to the fourth embodiment performs a predetermined time (for example, 5 hours) while continuing the power supply voltage monitoring when the power supply voltage monitoring is detected by detecting the power supply voltage. ) After the elapse of time, the threshold level that is the second voltage value when the determination of the power supply voltage drop is made again is the threshold value that is the first voltage value when the determination of the first power supply voltage drop is made (as the low level) For example, the above-described implementation is that the power supply voltage is monitored by setting a voltage higher than (for example, 5.2 V as a normal level) (in other words, a hysteresis characteristic is provided for detection of a power supply voltage drop). 9 is different from that of the third embodiment (FIG. 9), and other operations, that is, the operations in steps 111 to 123 excluding step 122, are performed in steps 911 to 911 excluding step 922 in the third embodiment. Is the same as the operation of the step 923.

In the fire alarm device of the fourth embodiment, when power supply voltage monitoring is performed and a power supply voltage drop is detected, the power supply voltage drop is determined again after a predetermined time (5 hours) while continuing the power supply voltage monitoring. When a power supply voltage drop is detected, a battery exhaustion alarm is output, so that a battery exhaustion alarm is not output due to a temporary power supply voltage drop as in the case of the third embodiment described above. It is easy to ensure the property. Also, when the power supply voltage drop is detected, the power supply voltage is not detected (judged) until the predetermined time has elapsed, so the number of times power is supplied to the power monitoring circuit is reduced, power consumption is reduced, The voltage drop can be suppressed, and the output time of the battery exhaustion alarm can be maximized. Further, in anticipation of a rise in room temperature when a predetermined time (5 hours) has elapsed, a threshold value that is a second voltage value at the time of power supply voltage monitoring after first detecting a power supply voltage drop is set at the time of the first power supply voltage monitoring. The power supply voltage is monitored by setting it higher than the first voltage value threshold (for example, 5 V) (5.2 V or more) (in other words, a hysteresis characteristic is provided for detection of power supply voltage drop). Therefore, it is possible to strictly check for defective power supply (battery).

Embodiment 5 FIG.
FIG. 11 is a flowchart showing the operation of the battery voltage drop monitoring process of the fire alarm device according to the fifth embodiment of the present invention, and other switch input determination processing operation, fire monitoring processing operation, disconnection monitoring processing operation, and monitoring result. Since output processing, hardware configuration, and the like are basically the same as those of the first embodiment, description thereof is omitted. In this case as well, the block diagram of FIG. 1 and the main flowchart of FIG. 2 are referred to, and the difference from the battery voltage drop monitoring processing operation of FIG. 6 will be mainly described.

The fire alarm of the fifth embodiment is slightly different from that of the first embodiment in the battery voltage drop monitoring process. In the fifth embodiment, as shown in FIG. 11, first, it is checked whether or not the fire flag is set (step 211). If the fire flag is not set, the battery voltage drop confirmation flag is set. If the battery voltage drop confirmation flag is not set, it is checked whether the voltage drop detection flag is set (step 213). If the voltage drop detection flag is not set in step 213, it is checked whether or not the voltage of the battery 1 has dropped to a predetermined voltage value or less (in this case, a drop level or less, for example, 5 V or less) ( Step 214) If the voltage has not decreased to 5 V or less, the process is terminated (Proceed to Step 7 in the main flowchart).
If it is determined in step 214 that the voltage of the battery 1 has dropped to 5 V or less, a voltage drop detection flag is set (step 215), and the 5-hour timer count for the battery voltage drop confirmation flag is started. (Step 216). Next, it is checked whether or not 5 hours have passed (step 217). If 5 hours have not passed, the process is terminated (proceeds to step 7 in the main flowchart), and if 5 hours have passed, the battery voltage drop confirmation flag is set. Set (step 218), the process ends (proceed to step 7 of the main flowchart).

  Thus, in the fire alarm device of the fifth embodiment, when power supply voltage monitoring is performed and a power supply voltage drop is detected, determination of power supply voltage drop is not performed again, while power supply voltage monitoring continues. Since a battery exhaustion warning is output after a predetermined time (5 hours) has elapsed and no judgment is made as to whether the power supply voltage has dropped within the predetermined time, the number of times power is supplied to the power supply monitoring circuit is reduced and power consumption is reduced. The power supply voltage drop can be suppressed, and the output time of the battery exhaustion alarm can be maximized.

Embodiment 6 FIG.
In addition, although the example of the fire alarm which detects a fire was demonstrated in the above-mentioned embodiment, this invention is applied similarly to what detects a flame and smoke. In the above embodiment, for example, the fire monitoring process in step 4 is performed every 3 seconds, the disconnection monitoring process in step 5 is performed every 3 seconds, and the battery voltage drop monitoring in step 6 is performed every 10 minutes. -Each monitoring process of step 6 may be intermittently performed at arbitrary time intervals.

Is a block diagram showing the configuration of a fire alarm according to the first embodiment. 3 is a flowchart showing an overall operation of the fire alarm device according to the first embodiment. 3 is a flowchart showing a switch input determination operation of the fire alarm device according to the first embodiment. 3 is a flowchart showing a fire monitoring operation of the fire alarm device according to the first embodiment. 4 is a flowchart showing disconnection monitoring operation of the fire alarm device according to the first embodiment. 4 is a flowchart showing a battery voltage monitoring operation of the fire alarm device according to the first embodiment. 4 is a flowchart illustrating a monitoring result output operation of the fire alarm device according to the first embodiment. It is a flowchart which shows the battery voltage monitoring operation | movement of the fire alarm device which concerns on Embodiment 2 of this invention. 10 is a flowchart showing a battery voltage monitoring operation of the fire alarm device according to the third embodiment. It is a flowchart which shows the battery voltage monitoring operation | movement of the fire alarm device which concerns on Embodiment 4 of this invention. It is a flowchart which shows the battery voltage monitoring operation | movement of the fire alarm which concerns on Embodiment 5 of this invention.

Explanation of symbols

1 Battery (Power)
2 Power supply monitoring circuit 6 Thermistor 8 Switch (test switch)
11 Speaker 12 Microcomputer (control means)
15 Speech synthesis circuit

Claims (5)

Power supply,
Speakers,
Power supply voltage monitoring is performed . When the power supply voltage falls below the first voltage value, a power supply voltage drop is detected. When the power supply voltage drop is detected, the power supply voltage is continuously monitored for a predetermined time after the detection. When the power supply voltage becomes lower than the second voltage value set higher than the first voltage value continuously for the predetermined time, a power supply voltage drop is detected. Control means for outputting from a speaker ;
A fire alarm characterized by comprising. Power supply,
Speakers,
The power supply voltage is monitored. When the power supply voltage falls below the first voltage value, the power supply voltage drop is detected. When the power supply voltage drop is detected, the power supply voltage is monitored after a predetermined time has elapsed from the detection time point. Control means for detecting a power supply voltage drop when the voltage falls below a second voltage value set higher than the first voltage value, and outputting a battery exhaustion alarm from the speaker when the power supply voltage drop is detected again. When,
Fire alarm you, comprising the. 3. The fire alarm according to claim 1, wherein after the predetermined time elapses, the control unit outputs a battery exhaustion alarm and does not monitor the power supply voltage while maintaining that the power supply voltage is low. . 2. The apparatus according to claim 1, further comprising a test switch, wherein when the test switch is operated before a predetermined time elapses, a battery low alarm is output when a power supply voltage drop is detected. Or the fire alarm of 2 description. Wherein the control means performs supply voltage monitor at the time of start-up of fire alarm, when detecting the power supply voltage drops in succession a plurality of times, according to claim 1-4 which immediately, characterized in that to output the battery exhaustion alarm A fire alarm according to any of the above.

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