TWI396145B - Fire alarm device - Google Patents

Description

Fire alarm

The present invention relates to a fire alarm provided with an integrated circuit.

The conventional fire alarm is supplied with power by the power supply unit, and when the fire detection unit detects a fire, the sound unit outputs an alarm sound (see, for example, Patent Document 1).

[Advanced technical literature] [Patent Literature]

(Patent Document 1) Japanese Patent Laid-Open Publication No. 2004-362537

In a conventional fire alarm, a fire detecting unit that detects a physical quantity according to a fire phenomenon is a person who detects smoke or detects heat. Further, the sound unit that outputs the alarm sound is output by a buzzer or by sound. In addition, the power supply unit that supplies the power source that operates the fire alarm includes an AC voltage such as a battery that uses a DC voltage or a commercial power source.

Then, a plurality of models are formed by forming a circuit configuration corresponding to the type of the fire sensing unit, the sound unit, the power source unit, and the like to be used.

On the other hand, it is expected to achieve miniaturization of the fire alarm or a reduction in the number of manufacturing projects by using an integrated circuit (IC: Integrated Circuit) in which the components of the fire alarm are formed into a wafer.

However, the use of a built-in circuit in which a component or the like that constitutes a fire alarm is used is used exclusively for a model in which a circuit corresponding to the type of the fire sensing unit, the sound unit, the power supply unit, and the like is used. The integrated circuit is the status quo.

In addition, in the case of imaginary use of an integrated circuit having a complex function, it is considered that a function of performing an operation by inputting a predetermined identification signal to a terminal (I/O, etc.) provided in the integrated circuit is performed. Switch.

However, it is necessary to provide the dedicated terminal for inputting the identification signal as described above in the integrated circuit, and there is a problem that the number of terminals of the integrated circuit increases.

This problem is more pronounced when the integrated circuit has more functions.

In order to solve the above problems, the present inventors have found a fire alarm device including an integrated circuit that can be used in at least a plurality of types of fire sensing units and acoustic units.

Further, a fire alarm capable of deleting the number of terminals provided in the integrated circuit is obtained.

The fire alarm of the present invention includes an integrated circuit including at least a fire detecting unit for detecting a physical quantity according to a fire phenomenon and an acoustic unit for outputting an alarm sound, and the integrated circuit includes: a light-emitting circuit connection terminal that is a light-emitting circuit that is a smoke detecting unit of the fire detecting unit; a light-receiving circuit connection terminal that is a light-receiving circuit that is a smoke detecting unit of the fire detecting unit; and a fire-sensing circuit connection that can be connected a heat detecting unit connection terminal of the heat detecting unit of the measuring unit; a buzzer circuit connecting terminal as a buzzer circuit of the sound unit; and a speaker connecting terminal constituting a speaker of the speaker unit of the sound unit; The light-receiving circuit connection terminal is connected to form a light-receiving circuit as a smoke detecting unit of the fire detecting unit, and is connected to the speaker connecting terminal to form a sound amplifying circuit as a speaker circuit of the sound unit; and the sound amplifying circuit Connected to form a digital analogy of the speaker circuit as the aforementioned audio unit And a control unit that is connected to the light-emitting circuit connection terminal, the light-receiving amplifying circuit, the heat detecting unit connection terminal, the buzzer circuit connection terminal, and the digital analog conversion circuit, wherein the control unit is connected to The input ID identification signal selects the smoke detecting unit or the heat detecting unit as the fire detecting unit, and selects the buzzer circuit or the speaker circuit as the acoustic portion to correspond to the selected fire sensing unit. The fire sensing operation and the alarm operation corresponding to the selected acoustic portion.

Further, the fire alarm device of the present invention includes an integrated circuit including at least a fire detecting unit for detecting a physical quantity according to a fire phenomenon, an acoustic unit for outputting an alarm sound, and a power supply unit for supplying power. The integrated circuit includes a light-emitting circuit connection terminal that can connect a light-emitting circuit that is a smoke detecting unit of the fire detecting unit, and a light-receiving circuit that is configured to receive a light receiving circuit that is a smoke detecting unit of the fire detecting unit. a connection terminal; a thermal detection unit connection terminal as a heat detecting portion of the fire detecting portion; a buzzer circuit connection terminal as a buzzer circuit of the acoustic portion; and a speaker constituting the acoustic portion a speaker connection terminal of the speaker of the circuit; a power connection terminal connected to the DC voltage source or the AC voltage source of the power supply unit; and a connection terminal connected to the light receiving circuit to form a light-receiving portion of the smoke detecting portion of the fire detecting portion a circuit; connected to the speaker connection terminal to form a sound as the sound portion a sound amplifying circuit of the circuit; connected to the sound amplifying circuit to form a digital analog conversion circuit as a speaker circuit of the sound portion; and connected to the power connection terminal, and being connected to a DC voltage source or an AC voltage source as the power source portion The supplied DC voltage is supplied to the constant voltage circuit of each component as a predetermined constant voltage; and the light-emitting circuit connection terminal, the light-receiving amplifying circuit, the heat detecting unit connection terminal, and the buzzer circuit connection terminal are respectively connected In the digital analog conversion circuit and the control unit of the constant voltage circuit, the control unit selects the smoke detecting unit or the heat detecting unit as the fire sensing unit based on the input ID identification signal, and selects the buzzer. The speaker circuit or the speaker circuit selects the DC voltage source or the AC voltage source as the power source unit as the sound unit, and performs a fire sensing operation corresponding to the selected fire sensing unit and the selected sound Corresponding alarm action, and the aforementioned The predetermined action corresponding to the power supply unit.

Further, in the fire alarm device of the present invention, the control unit sets an input voltage from the buzzer circuit connection terminal as an ID identification signal of the audio unit, and the input voltage of the buzzer circuit connection terminal is pulled up. Alternatively, when the pull-down is performed, the buzzer circuit is selected as the acoustic portion.

Further, in the fire alarm device of the present invention, the control unit uses an input voltage from the connection terminal of the heat detecting unit as an ID identification signal of the fire detecting unit, and an input voltage of the connection terminal of the heat detecting unit is pulled up. Alternatively, when the pull-down is performed, the smoke detecting unit is selected as the fire detecting unit.

Further, in the fire alarm device of the present invention, the control unit sets a temperature sensing signal based on an input voltage from the connection terminal of the heat detecting unit as an ID identification signal of the fire sensing unit when the temperature sensing is performed by the temperature sensing. When the sensing temperature obtained by the signal is within a predetermined temperature range, the heat detecting portion is selected as the fire sensing portion.

Further, in the fire alarm device of the present invention, the integrated circuit includes: input of ID information in which the smoke detecting unit or the heat detecting unit, the buzzer circuit, or the speaker circuit are selected. a memory unit connection terminal, wherein the control unit is configured such that the smoke detecting unit or the heat detecting unit selected by the ID identification signal, the buzzer circuit or the speaker circuit does not match the ID information, that is, Perform a predetermined abnormal output action.

According to the present invention, the smoke detecting unit or the heat detecting unit is selected as the fire detecting unit based on the input ID identifying signal, and the buzzer circuit or the speaker circuit is selected as the sound unit to perform the corresponding fire sensing unit. The fire sensing operation and the alarm action corresponding to the selected sound unit. Therefore, the integrated circuit can be used in a plurality of models corresponding to the types of the fire sensing unit and the sound unit.

Further, based on the input ID identification signal, the smoke detecting unit or the heat detecting unit is selected as the fire detecting unit, and the buzzer circuit or the speaker circuit is selected as the sound unit, and the DC voltage source or the AC voltage source is selected as the power source unit. A fire sensing operation corresponding to the selected fire sensing unit, an alarm operation corresponding to the selected sound unit, and a predetermined operation corresponding to the selected power source unit. Therefore, the integrated circuit can be used in a plurality of types corresponding to the types of the fire sensing unit, the sound unit, and the power source unit.

Further, the input voltage from the buzzer circuit connection terminal is used as the ID identification signal of the audio unit, and when the input voltage of the buzzer circuit connection terminal is pulled up or pulled down, the buzzer circuit is selected as the audio unit. Therefore, the number of terminals provided in the integrated circuit can be reduced.

Further, the input voltage from the connection terminal of the heat detecting unit is used as the ID identification signal of the fire detecting unit, and when the input voltage of the connection terminal of the heat detecting unit is pulled up or pulled down, the smoke detecting unit is selected as the fire detecting unit. Therefore, the number of terminals provided in the integrated circuit can be reduced.

In addition, the temperature sensing signal according to the input voltage from the connection terminal of the heat detecting portion is used as the ID identification signal of the fire sensing portion, when the sensing temperature determined by the temperature sensing signal is within a predetermined temperature range, That is, the heat detecting unit is selected as the fire detecting unit. Therefore, the number of terminals provided in the integrated circuit can be reduced.

Further, when the smoke detecting unit or the heat detecting unit selected by the ID identification signal, and the buzzer circuit or the speaker circuit do not coincide with the ID information, a predetermined abnormal output operation is performed. Therefore, it is possible to sense an erroneous connection to the integrated circuit or an erroneous setting of the ID information.

(Embodiment 1)

Fig. 1 is a block diagram showing a fire alarm of the first embodiment.

As shown in Fig. 1, the fire alarm system includes an integrated circuit 1.

Next, the integrated circuit 1 is selectively connected to the smoke detecting unit 2 or the heat detecting unit 3 as a fire detecting unit.

Further, the integrated circuit 1 is selectively connected to the buzzer circuit 4 or the speaker circuit 5 as an acoustic portion.

Further, a DC voltage source or an AC voltage source is selectively connected to the integrated circuit 1 as the power source unit 8.

Further, the integrated circuit 1 is connected to the EEPROM 6 and the display unit 7.

The fire alarm is operated by the power supply unit 8 to receive power supply, and the fire detecting unit detects the physical quantity according to the fire phenomenon, and outputs an alarm sound by the sound unit.

Further, the fire alarm device is configured in a plurality of models by being selectively connected to the type of the component portion of the integrated circuit 1.

For example, it is possible to detect the smoke caused by a fire by a DC voltage source, output an alarm sound by a buzzer, or operate by an AC voltage source to detect heat caused by a fire, by means of a speaker An operation corresponding to the selected component type such as a warning sound is output.

As described above, the integrated circuit 1 can be used in a plurality of models.

Among them, the type of the component that is selectively connected to the integrated circuit 1 is selected according to the model of the fire alarm, for example, when the fire alarm is manufactured.

In the first drawing, the state in which the smoke detecting unit 2 and the heat detecting unit 3 are simultaneously connected to the integrated circuit 1 is shown.

In addition, in the first figure, the state in which the buzzer circuit 4 and the speaker circuit 5 are simultaneously connected to the integrated circuit 1 is shown.

The integrated circuit 1 includes a control unit 10, an oscillator 11, a reset unit 12, a light receiving amplifier 24 constituting the smoke detecting unit 2, a sound amplifier 52 constituting the speaker circuit 5, a sound DAC&LPF 51 constituting the speaker circuit 5, and confirmation. A lamp driving circuit 70 and a constant voltage circuit 80.

In the integrated circuit 1, a plurality of electronic components constituting each component are wafer-formed and sealed in a semiconductor package of a small package.

Among them, the light receiving amplifier 24 corresponds to the light receiving amplifying circuit in the present invention.

Among them, the sound amplifier 52 corresponds to the sound amplifying circuit in the present invention.

Among them, the DAC & LPF51 for sound corresponds to the digital analog conversion circuit in the present invention.

Further, the integrated circuit 1 is provided with a plurality of connection terminals (埠).

The light-emitting circuit connection terminal 101 is connectable to the infrared LED drive circuit 21 constituting the smoke detecting unit 2.

The light receiving circuit connection terminal 102 is connectable to the PD conversion circuit 23 constituting the smoke detecting unit 2.

The heat detecting unit connection terminals 103 and 104 are connectable to the heat detecting unit 3.

The abnormal signal output terminal 105 outputs an abnormality signal (described later) from the control unit 10.

The EEPROM connection terminal 106 is connected to the EEPROM 6.

The buzzer circuit connection terminal 107 is connectable to the buzzer circuit 4.

The speaker connection terminals 108 and 109 are connectable to the speaker 53 constituting the speaker circuit 5.

The power connection terminal 110 is connectable to a DC voltage source or an AC voltage source as the power supply unit 8.

The power ID terminal 111 is input with an ID identification signal (described later) of the power supply unit 8.

The display unit 7 is connected to the confirmation lamp connection terminals 112 and 113.

Among them, the infrared LED drive circuit 21 corresponds to the light-emitting circuit in the present invention.

Among them, the PD conversion circuit 23 corresponds to the light receiving circuit in the present invention.

The EEPROM connection terminal 106 corresponds to the memory unit connection terminal in the present invention.

The smoke detecting unit 2 is composed of an infrared LED driving circuit 21, an infrared LED 22, and a PD conversion circuit 23.

The infrared LED drive circuit 21 is connected to the control unit 10 via the light-emitting circuit connection terminal 101, and the infrared LED 22 is driven by an instruction from the control unit 10.

The infrared LED 22 emits infrared light. This infrared light is scattered by the smoke flowing into the inside of the smoke detecting unit 2.

The PD conversion circuit 23 is connected to the light receiving amplifier 24 through the light receiving circuit connection terminal 102. The PD conversion circuit 23 receives the scattered light that is emitted by the infrared LED 22 and is scattered by the smoke.

The light receiving amplifier 24 is formed in the integrated circuit 1. The light receiving amplifier 24 is connected to the control unit 10, and amplifies the received light signal of the PD conversion circuit 23 and inputs it to the control unit 10.

In the smoke detecting unit 2 as described above, the control unit 10 intermittently causes the infrared LED 22 to emit light, converts the input received light signal into AD, and determines that smoke is generated to determine the occurrence of a fire.

The heat detecting unit 3 is composed of a resistor 31 and a heat resistor 32.

The resistor 31 is connected to the control unit 10 through the heat detecting unit connection terminal 103.

The thermistor 32 is connected in series with the resistor 31.

Further, a connection point between the resistor 31 and the thermistor 32 is transmitted through the heat detecting portion connection terminal 104 to be connected to the control unit 10.

The heat detecting unit 3 as described above changes the resistance value of the thermistor 32 by the heat caused by the fire, and changes the voltage dividing ratio of the resistor 31 and the thermistor 32.

Then, the control unit 10 intermittently transmits the heat detecting unit connection terminal 103 to the resistor 31 and the thermistor 32, and converts the voltage (temperature sensing signal) input from the heat detecting unit connection terminal 104 into AD. The temperature is measured, and the occurrence of the fire is judged based on the sensed temperature.

Wherein, the sensing of the temperature is performed by making the input voltage range correspond to the sensing temperature range. For example, for an input voltage of 0 to 5 V, set -50 ° C to 100 ° C.

The sensing temperature range can be arbitrarily set, but it is preferably set in the vicinity of the intermediate value of the AD value level by, for example, a imaginary temperature range (for example, 25 ° C ± 10 ° C) in a normal time (when the fire does not occur).

The EEPROM 6 is connected to the control unit 10 via the EEPROM connection terminal 106.

The EEPROM 6 stores at least the ID information selected from the smoke detecting unit 2 or the heat detecting unit 3 as the fire detecting unit, and the buzzer circuit 4 or the speaker circuit 5 as the sound unit, and inputs the ID information to the control. Department 10.

The operation of the control unit 10 based on the ID information will be described in detail later.

In the first embodiment, the case where the ID information is stored in the EEPROM (Electrically Erasable and Programmable Read Only Memory) is described. However, the present invention is not limited thereto, and may be in other non-volatile memory, or Memory ID information such as ROM (Read Only Memory).

The buzzer circuit 4 is composed of a buzzer drive circuit 41 and a buzzer 42.

The buzzer drive circuit 41 is connected to the control unit 10 via the buzzer circuit connection terminal 107.

The buzzer 42 is driven by the buzzer drive circuit 41.

An example of the circuit configuration of the buzzer circuit 4 will be described with reference to FIG.

Fig. 2 is a circuit diagram showing a configuration in which a heat detecting unit 3 as a fire detecting unit is connected and a buzzer circuit 4 as an acoustic unit is connected.

As shown in Fig. 2, the buzzer circuit 4 connects the coil L to the power supply line of the predetermined potential Vbat through the resistor R. A transistor Q is connected in series through the coil L and the diode D. Next, the buzzer 42 is constituted by, for example, a piezoelectric buzzer BZ, one of which is connected to the power supply line and the other of which is grounded through the transistor Q.

Next, the PWM signal from the control unit 10 is supplied to the base of the transistor Q, thereby driving the transistor Q, and the buzzer 42 is driven by generating an induced voltage at the coil L corresponding to the PWM pulse.

Further, as shown in FIG. 2, when the buzzer circuit 4 is connected, the buzzer circuit connection terminal 107 is pulled-down through the resistor RBZ.

However, the circuit configuration of the buzzer circuit 4 is not limited thereto, and may be formed in any circuit configuration. Further, in the first embodiment, the case where the buzzer circuit connection terminal 107 is pulled down when the buzzer circuit 4 is connected will be described, but the present invention is not limited thereto, and may be formed to connect the buzzer. In the case of the circuit 4, the buzzer circuit connection terminal 107 is constituted by a pull-up.

Further, in Fig. 1, the speaker circuit 5 is composed of a sound DAC & LPF 51, a sound amplifier 52, and a speaker 53.

The sound DAC & LPF51 is formed in the integrated circuit 1. The sound is connected to the control unit 10 by the DAC & LPF 51, and the digital audio signal output from the control unit 10 is converted into an analog sound signal.

In addition, the DAC&LPF51 for sound has a low-pass filter that cuts unnecessary bands among the converted analog audio signals.

The sound amplifier 52 is formed in the integrated circuit 1. The sound amplifier 52 is connected to the speaker 53 through the speaker connection terminals 108 and 109. The sound amplifier 52 amplifies the analog sound signal generated by the sound DAC & LPF 51 and inputs it to the speaker 53.

The power supply unit 8 is constituted by a battery 81 as a DC voltage source that generates a DC voltage or an AC voltage source (not shown). The power supply unit 8 is connected to the power supply connection terminal 110.

In the first embodiment, the battery 81 as the power supply unit 8 is connected, but an AC voltage source may be connected instead. The AC voltage source is composed of an AC power source that generates an AC voltage and an AC-DC converter circuit that converts an AC voltage into a DC voltage.

The constant voltage circuit 80 is formed in the integrated circuit 1. The constant voltage circuit 80 is connected to the power supply unit 8 via the power connection terminal 110. Then, the DC voltage supplied from the power supply unit 8 is supplied to each component as a predetermined constant voltage.

The reset unit 12 is formed in the integrated circuit 1. The reset unit 12 detects a voltage output by the constant voltage circuit 80, and when it is formed to be equal to or lower than a predetermined voltage, performs a predetermined reset operation. For example, when the voltage of the constant voltage circuit 80 is lowered, even if the operation of the control unit 10 is stopped, the control unit 10 is not caused to perform an indefinite operation.

The oscillator 11 is formed in the integrated circuit 1. The oscillator 11 is connected to the control unit 10 and supplies a predetermined operation clock to the control unit 10.

The display unit 7 is composed of a green LED 71 and a red LED 72.

The green LED 71 is connected to the confirmation lamp drive circuit 70 via the confirmation lamp connection terminal 112.

The red LED 72 is connected to the confirmation lamp drive circuit 70 via the confirmation lamp connection terminal 113.

It is confirmed that the lamp driving circuit 70 is formed in the integrated circuit 1. The confirmation lamp drive circuit 70 is connected to the control unit 10, and drives the green LED 71 and the red LED 72 by an instruction from the control unit 10.

The control unit 10 controls the entire fire alarm. Further, an operation corresponding to the type of the component that is selectively connected to the integrated circuit 1 is performed based on the input ID identification signal by an operation to be described later.

The detailed configuration of each unit constituting the fire alarm will be described above.

Next, an operation of the fire alarm corresponding to the type of the component that is selectively connected to the integrated circuit 1 will be described.

(fire sensing action)

FIGS. 3 and 4 show a circuit configuration diagram in which the smoke detecting unit 2 as the fire detecting unit is connected and the speaker circuit 5 as the sound unit is connected.

First, the fire sensing operation when the smoke detecting unit 2 or the heat detecting unit 3 as the fire detecting unit is selectively connected will be described with reference to FIGS. 1 to 4 .

(using the heat detecting unit 3)

When the heat caused by the fire is detected as the fire detecting unit, as shown in Fig. 2, the heat detecting unit 3 is connected to the heat detecting unit connecting terminals 103 and 104.

In this case, the infrared LED drive circuit 21 and the PD conversion circuit 23 of the smoke detecting unit 2 shown in FIG. 1 are not connected to the light-emitting circuit connection terminal 101 and the light-receiving circuit connection terminal 102.

In the state as described above, the control unit 10 performs a fire sensing operation corresponding to the connected fire sensing unit by using the temperature sensing signal input from the heat detecting unit connection terminal 104 as an ID identification signal.

First, the control unit 10 is energized by the heat detecting unit connection terminal 103 and the resistor 31 and the resistor 32 by a predetermined timing such as when the power is turned on.

Next, the control unit 10 AD converts the temperature sensing signal (voltage) input from the heat detecting unit connection terminal 104.

At this time, the thermistor 32 is formed to have a resistance value corresponding to the installation environment according to its thermal characteristics. Next, a voltage corresponding to the voltage division ratio of the thermistor 32 and the resistor 31 is input to the control unit 10 as a temperature sensing signal.

Next, the control unit 10 determines whether or not the sensed temperature obtained by the AD-converted temperature sensing signal (AD value level) is within a predetermined temperature range. In this temperature range, the range in which the upper limit value and the lower limit value of the sensing range are not included is set. However, for example, it is set to a temperature range that is assumed to be normal (when the fire does not occur), for example, 25 ° C ± 10 ° C.

When the sensing temperature is within the predetermined temperature range, the control unit 10 selects the heat detecting unit 3 as the fire detecting unit.

Among them, regarding the case where the sensing temperature is not within the predetermined temperature range, the volume is compensated.

The fire sensing operation corresponding to the selected heat detecting unit 3 is performed later.

In other words, the control unit 10 intermittently transmits the resistors 31 and the thermal resistors 32 through the heat detecting unit connection terminal 103, and AD converts the voltage (temperature sensing signal) input from the heat detecting unit connection terminal 104. The occurrence of a fire is judged based on the sensed temperature.

(Use smoke detection unit 2)

When the smoke caused by the fire is detected as the fire detecting unit, as shown in Fig. 1, the infrared LED driving circuit 21 of the smoke detecting unit 2 is connected to the light emitting circuit connecting terminal 101, and the PD converting circuit 23 and the light receiving circuit are connected. The connection terminals 102 are connected.

At this time, as shown in FIG. 3, the heat detecting portion connection terminal 104 is pulled up by the pull-up resistor Rpu. Further, the heat detecting portion 3 is not connected to the heat detecting portion connection terminal 103.

In the state as described above, the control unit 10 performs the fire sensing operation corresponding to the connected fire sensing unit by using the input voltage when the thermal detecting unit connection terminal 104 is pulled up as the ID identification signal.

First, the control unit 10 AD-converts the voltage input by the thermal detecting unit connection terminal 104 by a predetermined timing such as when the power is turned on.

At this time, since the thermal detecting unit connection terminal 104 is pulled up, the Hi level voltage (VDD) is input to the control unit 10. Therefore, the sensed temperature obtained by the AD-converted input voltage (AD value level) becomes the temperature of the upper limit value.

Next, the control unit 10 determines whether or not the sensing temperature is within a predetermined temperature range. In this temperature range, the range in which the upper limit value and the lower limit value of the sensing range are not included is set. For example, it is set to a temperature range assumed to be normal (when the fire does not occur), for example, 25 ° C ± 10 ° C.

As described above, since the sensed temperature becomes the upper limit value, the control unit 10 determines that the sensed temperature is not within the predetermined temperature range. At this time, the control unit 10 selects the smoke detecting unit 2 as the fire detecting unit.

The fire sensing operation corresponding to the selected smoke detecting unit 2 is performed later.

That is, the control unit 10 drives the infrared LED drive circuit 21 to intermittently cause the infrared LED 22 to emit light. Then, the received light signal detected by the PD conversion circuit 23 is transmitted to the control unit 10 through the light receiving amplifier 24. The control unit 10 performs AD conversion on the received light signal to determine that smoke is generated, and determines the occurrence of a fire.

In the third embodiment, the thermal detection unit connection terminal 104 is pulled up. However, as shown in FIG. 4, the thermal detection unit connection terminal 104 may be pulled down by the pull-down resistor Rpd. The input voltage at the time of pulling is used as the ID identification signal, and the smoke detecting unit 2 is selected as the fire sensing unit.

That is, when the thermal detecting unit connection terminal 104 is pulled down, the voltage (GND) of the Low level is input to the control unit 10. At this time, the sensed temperature obtained by the AD-converted input voltage (AD value level) becomes the lower limit temperature. Thereby, the control unit 10 determines that the sensing temperature is not within the predetermined temperature range.

(alarm action)

Next, the alarm operation when the buzzer circuit 4 or the speaker circuit 5 as the acoustic unit is selectively connected will be described with reference to FIGS. 1 to 3 .

(Using the buzzer circuit 4)

When the sound caused by the buzzer as the sound unit is output, as shown in Fig. 2, the buzzer circuit 4 is connected to the buzzer circuit connection terminal 107.

However, at this time, the speaker 53 of the speaker circuit 5 shown in Fig. 1 is not connected to the speaker connection terminals 108 and 109.

In the state as described above, the control unit 10 performs an alarm operation corresponding to the connected acoustic unit by using the input voltage when the buzzer circuit connection terminal 107 is pulled down as an ID identification signal.

First, the control unit 10 detects the voltage value input by the buzzer circuit connection terminal 107 by a predetermined timing such as when the power is turned on.

When the buzzer circuit 4 is connected, as shown in Fig. 2, the buzzer circuit connection terminal 107 is pulled down through the resistor RBZ. Therefore, the voltage (GND) of the Low level is input to the control unit 10.

The control unit 10 determines whether or not the buzzer circuit connection terminal 107 has been pulled down based on the detected voltage value.

Among them, the judgment as to whether or not the pull-down has been made is made by whether or not the voltage value is zero volt or within a predetermined range in the vicinity thereof.

Next, when it is judged that the buzzer circuit connection terminal 107 has been pulled down, the buzzer circuit 4 is selected as the acoustic portion.

The alarm action corresponding to the selected buzzer circuit 4 is performed later.

In other words, the control unit 10 determines the occurrence of a fire by the fire sensing operation as described above, and outputs a PWM signal to the buzzer circuit connection terminal 107 when a fire is sensed.

Thereby, the transistor Q of the buzzer drive circuit 41 is supplied with a PWM signal to drive the transistor Q, and the buzzer 42 is driven by generating an induced voltage at the coil L corresponding to the PWM pulse.

(using speaker circuit 5)

When the sound caused by the speaker as the sound portion is output, as shown in Fig. 1, the speaker 53 of the speaker circuit 5 is connected to the speaker connection terminals 108, 109.

However, at this time, the buzzer circuit 4 is not connected to the buzzer circuit connection terminal 107, and as shown in FIG. 3, it is pulled up by the pull-up resistor Rsp.

In the state as described above, the control unit 10 performs an alarm operation corresponding to the connected acoustic unit by using the input voltage when the buzzer circuit connection terminal 107 is pulled up as the ID identification signal.

First, the control unit 10 detects the voltage value input by the buzzer circuit connection terminal 107 by a predetermined timing such as when the power is turned on.

At this time, since the buzzer circuit connection terminal 107 has been pulled up, the Hi level voltage (VDD) is input to the control unit 10.

The control unit 10 determines whether or not the buzzer circuit connection terminal 107 has been pulled up based on the detected voltage value.

Among them, whether or not the pull-up is judged is determined by whether or not the voltage value is the upper limit value (for example, 5 V) of the input voltage or within a predetermined range in the vicinity thereof.

Next, when it is judged that the buzzer circuit connection terminal 107 has been pulled up, the speaker circuit 5 is selected as the acoustic portion.

An alarm action corresponding to the selected speaker circuit 5 is performed later.

In other words, the control unit 10 determines the occurrence of a fire by the fire sensing operation as described above, and outputs a digital sound signal to the sound DAC&LPF 51 when a fire is sensed.

The sound DAC&LPF 51 converts the digital sound signal from the control unit 10 into an analog sound signal, and the low-pass filter cuts off the unnecessary frequency band.

Next, the sound amplifier 52 amplifies the analog sound signal from the sound DAC & LPF 51 and outputs it to the speaker 53. The speaker 53 emits sound or the like by analog sound signals.

In the above description, when it is determined that the buzzer circuit connection terminal 107 has been pulled down, the buzzer circuit 4 is selected as the acoustic portion, and when it is determined that the buzzer circuit connection terminal 107 has been pulled up, That is, the case where the speaker circuit 5 is selected as the acoustic portion will be described.

The present invention is not limited thereto, and the acoustic portion can be selected by the reverse logic.

In other words, the buzzer circuit 4 may be formed in a connected state to form a circuit in which the buzzer circuit connection terminal 107 is pulled up. When it is determined that the buzzer circuit connection terminal 107 has been pulled up, the buzzer is selected. The speaker circuit 4 serves as an acoustic unit, and when it is determined that the buzzer circuit connection terminal 107 has been pulled down, the speaker circuit 5 is selected as the acoustic portion.

(predetermined action corresponding to the power supply unit 8)

Next, a predetermined operation when the DC voltage source or the AC voltage source is selectively connected as the power source unit 8 will be described using FIG.

In the first diagram, an ID identification signal for identifying which of the DC voltage source or the AC voltage source the power supply unit 8 is used is input to the power source ID terminal 111.

The ID identification signal input to the power supply ID terminal 111 is set to a Hi level voltage (for example, 5 V) when the display power supply unit 8 is a DC voltage source, and when the display power supply unit 8 is an AC voltage source, A voltage that is set to the Low level (eg, zero volts).

In the state as described above, the control unit 10 performs a predetermined operation corresponding to the connected power supply unit 8 based on the ID identification signal input from the power source ID terminal 111.

(using DC voltage source)

When a DC voltage source is used as the power supply unit 8, as shown in Fig. 1, the battery 81 is connected to the power supply connection terminal 110.

Next, an ID identification signal (for example, a Hi level) in which the display power supply unit 8 is a DC voltage source is input to the power source ID terminal 111.

First, the control unit 10 detects the ID identification signal input from the power source ID terminal 111 by a predetermined timing such as when the power is turned on.

The control unit 10 determines which of the DC voltage source or the AC voltage source the power supply unit 8 is based on the detected voltage value of the ID.

Wherein, the determination is made by whether the voltage value is Hi level (for example, 5 V) or within a predetermined range in the vicinity thereof, and the voltage value is a Low level (for example, zero volt) or a predetermined range in the vicinity thereof. .

When the control unit 10 determines that the power supply unit 8 is a DC voltage source, the confirmation lamp driving circuit 70 is driven to turn on only the red LED 72 as a predetermined operation corresponding to the power supply unit 8.

(using an AC voltage source)

When an AC voltage source is used as the power supply unit 8, an AC power supply and an AC-DC conversion circuit (not shown) are connected to the power supply connection terminal 110.

Next, an ID identification signal (for example, a Low level) in which the display power supply unit 8 is an AC voltage source is input to the power source ID terminal 111.

In the state as described above, the control unit 10 determines which of the DC voltage source or the AC voltage source the power supply unit 8 is based on the voltage value of the detected ID identification signal, similarly to the above-described operation.

When the control unit 10 determines that the power supply unit 8 is an AC voltage source, the confirmation lamp driving circuit 70 is driven to turn on both the red LED 72 and the green LED 71 as a predetermined operation corresponding to the power supply unit 8.

Here, the predetermined action corresponding to the power supply unit 8 can be arbitrarily performed, and is not limited thereto. For example, when it is determined that the DC voltage source is used, it is also possible to drive using a circuit or the like that monitors the battery voltage connected to the outside.

The operation of the fire alarm corresponding to the type of the component selectively connected to the integrated circuit 1 will be described above.

Next, an operation in which the state of the component connected to the integrated circuit 1 and the state of operation selected by the control unit 10 do not match will be described.

(abnormal detection)

As described above, the control unit 10 performs an operation corresponding to the model of the fire alarm device depending on the type of the component that is selectively connected to the integrated circuit 1.

Here, for example, in the manufacturing process of the fire alarm, etc., when the component selected in accordance with the model is not connected to the integrated circuit 1 due to a connection failure or the like, the control unit 10 performs a different function from the model. action.

The operation for detecting the inconsistency between the connection state of the component connected to the integrated circuit 1 and the operation state selected by the control unit 10 as described above will be described using FIG.

The abnormality detection is assumed to be performed in, for example, a manufacturing process of a fire alarm, but may be performed by a power-on or a predetermined timing in a fire alarm setting state, and is not limited thereto.

Figure 5 is a flow chart showing the abnormality detecting action.

The steps of Fig. 5 will be described below.

(S1)

When the control unit 10 is powered on, the abnormality detecting operation is started.

(S2)

Then, the control unit 10 selects the smoke detecting unit 2 as the fire detecting unit based on the ID identification signal input corresponding to the type of the component that is selectively connected to the integrated circuit 1 by the above operation. The heat detecting unit 3 and the buzzer circuit 4 or the speaker circuit 5 as an acoustic unit.

(S3)

The control unit 10 reads the ID information from the EEPROM 6 connected via the EEPROM connection terminal 106.

Here, in the EEPROM 6, at least the ID information of the smoke detecting unit 2 or the heat detecting unit 3 as the fire detecting unit and the buzzer circuit 4 or the speaker circuit 5 as the sound unit is selected in advance.

(S4)

The control unit 10 compares the fire sensing unit and the sound unit selected by the input ID identification signal, and the fire sensing unit and the sound unit selected by the ID information to determine whether or not Consistent.

(S5)

When it is determined in step S4 that the coincidence does not coincide, the control unit 10 outputs an abnormal signal to the abnormal signal output terminal 105 as an abnormal output operation.

In the abnormal signal output terminal 105, for example, a test device for setting a diagnosis by a fire alarm is connected.

The output of the abnormal signal is not limited to the abnormal signal output terminal 105, and communication with a test machine or the like may be performed by, for example, a communication means.

The abnormal output operation is not limited thereto, and the abnormal signal output to the abnormal signal output terminal 105 may be replaced, or a predetermined display by the display unit 7 or a predetermined sound or sound may be emitted by the acoustic unit.

For example, each of the LEDs of the display unit 7 is formed in a flashing state different from that in the normal state. Further, for example, the speaker circuit 5 outputs a sound such as "is abnormal."

(S6)

The control unit 10 ends the abnormality detecting operation.

However, the abnormality detecting operation can be ended, and the operation of the control unit 10 can be stopped, and the fire alarm can be prevented from malfunctioning.

(S7)

On the other hand, if it is determined in step S4 that the phases match, the control unit 10 shifts to the normal mode and performs normal operation processing.

(S8)

The control unit 10 ends the abnormality detecting operation.

By the operation as described above, it is possible to detect the inconsistency between the connection state of the component connected to the integrated circuit 1 and the operation state selected by the control unit 10.

As described above, in the present embodiment, the control unit 10 selects the smoke detecting unit 2 or the heat detecting unit 3 as the fire detecting unit based on the input ID identifying signal, and selects the buzzer circuit 4 or the speaker circuit 5. As the sound unit, a fire sensing operation corresponding to the selected fire detecting unit and an alarm operation corresponding to the selected sound unit are performed.

Therefore, the integrated circuit 1 can be used in a plurality of types corresponding to the types of the fire sensing unit and the sound unit.

Further, the control unit 10 selects a DC voltage source or an AC voltage source as the power source unit 8 based on the ID identification signal input from the power source ID terminal 111, and performs a predetermined operation corresponding to the selected power source unit 8.

Therefore, the integrated circuit 1 can be used in a plurality of types corresponding to the type of the power supply unit 8.

Further, a part of the components constituting the fire alarm is formed in the integrated circuit 1. Thereby, the miniaturization of the fire alarm or the reduction of the number of manufacturing projects can be achieved.

Further, the infrared LED drive circuit 21 and the PD conversion circuit 23 are not formed in the integrated circuit 1. Thereby, the accuracy of the integration is not reduced, and the occurrence of smoke can be sensed with high precision.

Further, the buzzer drive circuit 41 is not formed in the integrated circuit 1. Thereby, the buzzer 42 can be driven using a coil having a large capacitance.

Further, the control unit 10 sets the input voltage from the buzzer circuit connection terminal 107 as the ID identification signal of the audio unit, and selects the buzzer circuit when the input voltage of the buzzer circuit connection terminal 107 is pulled up or pulled down. 4 as the sound department.

Therefore, the number of terminals provided in the integrated circuit 1 can be reduced.

Further, the control unit 10 uses the input voltage from the heat detecting unit connection terminal 104 as the ID identification signal of the fire detecting unit, and selects the smoke detecting unit 2 when the input voltage of the heat detecting unit connection terminal 104 is pulled up or pulled down. As a fire sensor.

Therefore, the number of terminals provided in the integrated circuit 1 can be reduced.

Further, the control unit 10 uses the temperature sensing signal based on the input voltage from the thermal detecting unit connection terminal 104 as the ID identification signal of the fire sensing unit, and the sensing temperature obtained by the temperature sensing signal is predetermined. When the temperature is within the range, the heat detecting unit 3 is selected as the fire detecting unit.

Therefore, the number of terminals provided in the integrated circuit 1 can be reduced.

Further, the control unit 10 is incompatible with the smoke detecting unit 2 or the heat detecting unit 3, the buzzer circuit 4 or the speaker circuit 5, and the ID information stored in the EEPROM 6 based on the input ID identification signal. When they match, a predetermined abnormal output action is performed.

Therefore, an erroneous connection to the integrated circuit 1 or an erroneous setting of the ID information can be sensed.

In the present embodiment, the control unit 10 selects the fire sensing unit and the sound unit by the connection state of the components connected to the integrated circuit 1. Further, the control unit 10 determines the type of the power supply unit 8 by the ID identification signal from the power source ID terminal 111.

The present invention is not limited thereto, and the control unit 10 may use the ID information input by the EEPROM 6 as an ID identification signal, and select only the types of the fire sensing unit, the sound unit, and the power source unit 8 by the ID information.

Even in the above-described operation, the integrated circuit 1 can be used in a plurality of models corresponding to the types of the fire sensing unit, the acoustic unit, and the power supply unit 8. In addition, the miniaturization of the fire alarm or the reduction of the number of manufacturing projects can be achieved.

In the present embodiment, the control unit 10 selects the type of the fire sensing unit and the sound unit by the connection state of the components connected to the integrated circuit 1.

The present invention is not limited thereto, and an ID dedicated terminal for selecting a fire sensing portion and an ID dedicated terminal for selecting an acoustic portion may be provided in the integrated circuit 1 to input a cigarette for identifying the fire sensing portion. The ID identification signal of the detection unit 2 or the thermal detection unit 3 and the ID identification signal for identifying which of the buzzer circuit 4 or the speaker circuit 5 the audio unit is.

Even with the configuration as described above, the control unit 10 can select the type of the fire sensing unit and the sound unit based on the ID identification signal input from the ID-dedicated terminals.

Therefore, the integrated circuit 1 can be used in a plurality of types corresponding to the types of the fire sensing unit and the sound unit. In addition, the miniaturization of the fire alarm or the reduction of the number of manufacturing projects can be achieved.

In the present embodiment, the integrated circuit 1 is configured such that the light-receiving amplifier 24 constituting the smoke detecting unit 2 and the sound DAC & LPF 51 and the sound amplifier 52 constituting the speaker circuit 5 are described.

The present invention is not limited thereto, and the devices may be provided outside the integrated circuit 1.

Even in the configuration as described above, the control unit 10 can select the fire sensing unit and the sound unit by the connection state of each component. Therefore, the number of terminals provided in the integrated circuit 1 can be reduced.

In the present embodiment, the ID identification signal or the like may be used when setting various setting information of the fire alarm at the factory. For example, when an operation parameter information or the like suitable for the EEPROM is written, if an ID identification signal or the like is read, and the ID identification signal or the like is compared with the operation parameter information, for example, smoke sensing as a fire sensing portion can be avoided. The Ministry of Information is mistakenly written into the information of the thermal sensing department.

1. . . Integrated circuit

2. . . Smoke detection department

3. . . Thermal detection department

4. . . Buzzer circuit

5. . . Speaker circuit

6. . . EEPROM

7. . . Display department

8. . . Power supply department

10. . . Control department

11. . . Oscillator

12. . . Reset section

twenty one. . . Infrared LED driver circuit

twenty two. . . Infrared LED

twenty three. . . PD conversion circuit

twenty four. . . Optical amplifier

31. . . resistance

32. . . Thermal resistor

41. . . Buzzer drive circuit

42. . . buzzer

51. . . Sound with DAC&LPF

52. . . Sound amplifier

53. . . speaker

70. . . Confirmation lamp drive circuit

71. . . Green LED

72. . . Red LED

80. . . Constant voltage circuit

81. . . battery

101. . . Light-emitting circuit connection terminal

102. . . Light receiving circuit connection terminal

103. . . Thermal detection unit connection terminal

104. . . Thermal detection unit connection terminal

105. . . Abnormal signal output terminal

106. . . EEPROM connection terminal

107. . . Buzzer circuit connection terminal

108. . . Speaker connection terminal

109. . . Speaker connection terminal

110. . . Power connection terminal

111. . . Power ID terminal

112. . . Confirm lamp connection terminal

113. . . Confirm lamp connection terminal

Fig. 1 is a block diagram showing a fire alarm of the first embodiment.

Fig. 2 is a circuit diagram showing a configuration in which a heat detecting unit 3 as a fire detecting unit is connected and a buzzer circuit 4 as an acoustic unit is connected.

Fig. 3 is a circuit configuration diagram when the smoke detecting unit 2 as the fire detecting unit is connected and the speaker circuit 5 as the sound unit is connected.

Fig. 4 is a circuit configuration diagram showing a case where the smoke detecting unit 2 as the fire detecting unit is connected and the speaker circuit 5 as the sound unit is connected.

Figure 5 is a flow chart showing the abnormality detecting action.

1. . . Integrated circuit

2. . . Smoke detection department

3. . . Thermal detection department

4. . . Buzzer circuit

5. . . Speaker circuit

6. . . EEPROM

7. . . Display department

8. . . Power supply department

10. . . Control department

11. . . Oscillator

12. . . Reset section

twenty one. . . Infrared LED driver circuit

twenty two. . . Infrared LED

twenty three. . . PD conversion circuit

twenty four. . . Optical amplifier

31. . . resistance

32. . . Thermal resistor

41. . . Buzzer drive circuit

42. . . buzzer

51. . . Sound with DAC&LPF

52. . . Sound amplifier

53. . . speaker

70. . . Confirmation lamp drive circuit

71. . . Green LED

72. . . Red LED

80. . . Constant voltage circuit

81. . . battery

101. . . Light-emitting circuit connection terminal

102. . . Light receiving circuit connection terminal

103. . . Thermal detection unit connection terminal

104. . . Thermal detection unit connection terminal

105. . . Abnormal signal output terminal

106. . . EEPROM connection terminal

107. . . Buzzer circuit connection terminal

108. . . Speaker connection terminal

109. . . Speaker connection terminal

110. . . Power connection terminal

111. . . Power ID terminal

112. . . Confirm lamp connection terminal

113. . . Confirm lamp connection terminal

Claims (6)

A fire alarm device comprising: a built-in circuit having at least a fire detecting unit for detecting a physical quantity according to a fire phenomenon; and an acoustic unit for outputting an alarm sound, wherein the integrated circuit is provided a light-emitting circuit connection terminal that is a light-emitting circuit that is a smoke detecting unit of the fire detecting unit; and a light-receiving circuit connection terminal that is a light-receiving circuit that is a smoke detecting unit of the fire detecting unit; a thermal detection unit connection terminal of the thermal detection unit of the sensing unit; a buzzer circuit connection terminal as a buzzer circuit of the acoustic unit; and a speaker connection terminal constituting a speaker of the speaker unit of the acoustic unit; a light-receiving circuit that is connected to the light-receiving circuit connection terminal and configured as a smoke detecting unit of the fire sensing unit; and is connected to the speaker connection terminal to form a sound amplifying circuit as a speaker circuit of the sound unit; and the sound amplification The circuits are connected to form a digital position as a speaker circuit of the aforementioned audio unit And a control unit that is connected to the light-emitting circuit connection terminal, the light-receiving amplifying circuit, the heat detecting unit connection terminal, the buzzer circuit connection terminal, and the digital analog conversion circuit, wherein the control unit is connected to the control unit The input ID identification signal selects the smoke detecting unit or the heat detecting unit as the fire detecting unit, and selects the buzzer circuit or the speaker circuit as the sound unit to perform the selected fire detecting unit. Corresponding fire sensing operation and an alarm operation corresponding to the selected acoustic portion. A fire alarm device comprising: a built-in circuit including at least a fire detecting unit for detecting a physical quantity according to a fire phenomenon; an acoustic unit for outputting an alarm sound; and a power supply unit for supplying power. The integrated circuit includes a light-emitting circuit connection terminal that can connect a light-emitting circuit that is a smoke detecting unit of the fire detecting unit, and a light-receiving circuit that is connected to a light-receiving circuit that is a smoke detecting unit of the fire detecting unit. a terminal; a heat detecting unit connection terminal that is a heat detecting unit of the fire detecting unit; a buzzer circuit connecting terminal that is a buzzer circuit of the sound unit; and a speaker circuit that is configured as the sound unit; a speaker connection terminal of the speaker; a power connection terminal that is a DC voltage source or an AC voltage source of the power supply unit; and a light receiving circuit that is connected to the light receiving circuit connection terminal to form a smoke detecting unit of the fire detecting unit Connected to the aforementioned speaker connection terminal to form a speaker as the aforementioned audio unit a sound amplifying circuit of the road; connected to the sound amplifying circuit to form a digital analog conversion circuit as a speaker circuit of the sound portion; and connected to the power connection terminal, and being connected to a DC voltage source or an AC voltage source as the power source portion The supplied DC voltage is supplied to the constant voltage circuit of each component as a predetermined constant voltage; and the light-emitting circuit connection terminal, the light-receiving amplifying circuit, the heat detecting unit connection terminal, and the buzzer circuit connection terminal are respectively connected In the digital analog conversion circuit and the control unit of the constant voltage circuit, the control unit selects the smoke detecting unit or the heat detecting unit as the fire sensing unit based on the input ID identification signal, and selects the buzzer. The speaker circuit or the speaker circuit selects the DC voltage source or the AC voltage source as the power source unit as the sound unit, and performs a fire sensing operation corresponding to the selected fire sensing unit and the selected sound The corresponding alarm action and the selected electricity The predetermined action corresponding to the source. The fire alarm according to claim 1 or 2, wherein the control unit uses an input voltage from the buzzer circuit connection terminal as an ID identification signal of the audio unit, and the buzzer circuit is connected. When the input voltage of the terminal is pulled up or pulled down, the buzzer circuit is selected as the acoustic portion. The fire alarm according to the first or second aspect of the invention, wherein the control unit uses an input voltage from the connection terminal of the heat detecting unit as an ID identification signal of the fire detecting unit, and the heat detecting unit is connected. When the input voltage of the terminal is pulled up or pulled down, the smoke detecting unit is selected as the fire detecting unit. The fire alarm according to claim 1 or 2, wherein the control unit uses a temperature sensing signal based on an input voltage from the connection terminal of the heat detecting unit as an ID identification signal of the fire sensing unit. When the sensing temperature obtained by the temperature sensing signal is within a predetermined temperature range, the heat detecting portion is selected as the fire sensing portion. The fire alarm according to the first or second aspect of the invention, wherein the integrated circuit includes: the smoke detecting unit or the heat detecting unit selected, and the buzzer circuit or a memory unit connection terminal for ID information of the speaker circuit, wherein the control unit is the smoke detecting unit or the heat detecting unit selected by the ID identification signal, the buzzer circuit or the speaker circuit, and the ID When the information does not match, the predetermined abnormal output action is performed.