JP2868229B2 - Optical wireless fire alarm - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a fire alarm system, and more particularly to an optical wireless fire alarm system.

[Prior art and its problems] Usually, signal transmission of a fire alarm system is performed by a wired system. However, when the layout of the room is frequently changed, there is a problem that the wired method requires a great deal of trouble and cannot be easily handled. In addition, in order to flexibly respond to the installation environment and to arrange the fire detection sensor at the optimum position taking into account the ventilation flow of air conditioning and the way the room is used, it can be freely located at any position regardless of wiring There is a demand for a cordless transmission system that can be attached to a computer.

In general, the cordless system uses radio waves, but the noise generated by OA equipment (electronic equipment) often seen in recent offices, malfunctions caused by illegal radio, etc.
There was no appropriate countermeasure against transmission failure, and it was difficult to put it to practical use for disaster prevention.

[Means for Solving the Problems] According to the optical transmission system of the present invention, the optical transmission system has high noise resistance, high reliability against transmission failure, and can be used for visibility deterioration due to smoking during a fire. In addition, a fire alarm system is provided in which the degree of freedom of installation by cordless is expanded.

Specifically, according to the present invention, a fire phenomenon detecting means for outputting fire information when a fire is detected, and fire information for converting the fire information obtained by the fire phenomenon detecting means into an optical signal and transmitting the signal spatially. A fire detection unit having a transmission unit and a response unit that receives an optical signal transmitted spatially, converts the requested information into an optical signal, and transmits the optical signal spatially, and an optical signal spatially transmitted from the fire detection unit. A receiving unit comprising: a light receiving unit for receiving light; a request unit for converting a request content into an optical signal to spatially transmit the request to the fire detecting unit; and a determining unit for determining and outputting a signal received by the light receiving unit. A fire alarm system is provided.

According to another aspect of the present invention, a fire phenomenon detecting means for outputting fire information when a fire is detected, and fire information for converting the fire information obtained from the fire phenomenon detecting means into an optical signal and spatially transmitting the light signal. A fire detection unit having a sending unit, a response unit for receiving a spatially transmitted request optical signal, converting the requested information into an optical signal, and spatially transmitting the signal, a light receiving unit for receiving the spatially transmitted optical signal; A requesting unit that converts request content into a request optical signal and spatially transmits the request content to the fire detection unit, and a determination unit that determines and outputs a signal received by the light receiving unit, and an optical signal And a mobile transmission unit for spatially transmitting the converted information to a fire alarm.

In a specific embodiment, the fire detection unit includes a test unit for the fire phenomenon detection unit, and the response unit operates the test unit when the received request optical signal is a test command, and the test result is obtained. Is transmitted.

Preferably, the receiving section is connected to a second receiving section. Further, the receiving section may have a transmitting section for transmitting a signal for transmitting a determination output of the determining section to a second receiving section via a telephone line.

Further, it is preferable that the determination means has a display unit for displaying a determination result.

[Operation] The information signal transmitted from the fire detection unit and the request signal transmitted from the mobile transmission unit are all converted to optical signals and transmitted cordlessly, so that noise resistance and high reliability against poor transmission are achieved. In addition, the degree of freedom of installation by cordless is greatly expanded, and since the degree of freedom of installation is wide, it is possible to install the apparatus so as to minimize the influence of visibility deterioration due to smoking during a fire.

In a combined transmission type fire alarm system that uses a telephone line between a repeater and a fire receiver and sends and receives signals by a telephone transmission device, by connecting a transmission terminal device to the telephone line of the nearest telephone, The wiring work can be largely omitted, and the fire signal can be easily transmitted to remote places by the wide area connection of the telephone.

FIG. 1 is a diagram schematically showing the configuration of a wireless fire alarm system according to the present invention. In the figure, reference numeral 10 denotes a fire detection system based on heat, smoke, and the like, and the detection is performed in the infrared region. This is a wireless fire detector as a fire detection unit that converts a signal into a signal and wirelessly transmits information. In this embodiment, the detection unit itself is a photoelectric smoke detector of a type that detects the presence of smoke by scattered light of smoke. Detector. 20 receives a fire signal or the like from the wireless fire detector 10, makes various judgments, displays the judgment result, etc., and displays the received contents and the judgment result as necessary, such as a telephone transmission terminal and an extension, etc. A controller as a receiving unit for notifying or notifying a monitoring panel by telephone transmission via a telephone line, or for notifying a fire receiver or the like in a disaster prevention center by wire or wirelessly, 30 This is a portable remote controller as a mobile transmission unit capable of transmitting a test command.

In FIG. 1, generally, one or more sensors 10 are arranged in one area, for example, one room, and the controller 20 can receive an optical signal from one or more sensors 10. Only one may be arranged in one area, or one controller 20 may be provided for each sensor. Thus, if only one controller 20 is provided, one or more sensors
The ten light emitting or light emitting parts and the light receiving part of one controller 20 are oriented such that the controller 20 can receive light signals from one or more sensors 10 and each When one controller 20 is provided for each sensor 10, the controller 20 is arranged so that it can receive only the optical signal from the corresponding sensor. Thus, the wireless sensor 10 monitoring the fire at predetermined time intervals (in this embodiment, every 3.5 seconds).
If a fire is detected, the light information of the fire is sent to the corresponding controller 20, and the controller 20 displays the information, issues an alarm, and displays the information as necessary. It is possible to notify the fire receiver which is not used or to notify the monitoring panel by telephone or the like via the telephone transmission terminal.

Therefore, the controller 20, the optical transceiver 22 for sending and receiving light from the wireless sensor 10 in its lower as shown is attached, also nine indicator L ₂₁ ~L ₂₉ When, is provided with seven switches SW ₂₁ to SW ₂₇ including a power supply switch SW _21.

Indicators L ₂₁ ~L ₂₆ is turned on in accordance with the optical information sent from the wireless sensor 10. When the fire indicator lamp L ₂₁ is lit is the case where light information sent from the wireless sensor 10 represents the effect of the fire, when the storage in the indicator L ₂₂ is lit stored for monitoring fire indicating that it is active, it indicates that the test results of the wireless sensor 10 was good when the test indicator L ₂₃ lit, wireless sensor 10 when the optical path blocking indicator L ₂₄ is turned on Indicating that the optical path between the controller and the controller 20 has been interrupted,
When the battery replacement indicator L ₂₅ lights up, wireless sensor 1
Indicates that life came to 0 of the battery, and when the sensor abnormality indicator lamp L ₂₆ is lit indicating that such wireless sensor 10 is dropped, the what like a sensor abnormality occurs.

When pressed, the power switch SW ₂₁ is, the controller 20 is operable power indicator L ₂₇ lights up.

When Utsuriho stop switch SW ₂₂ is not pressed, when receiving a fire signal from the wireless sensor 10, the fire signal from the controller 20, the transfer i.e. Utsuriho to monitoring panel and fire receiver or the like (not shown) performed, Utsuriho stop indicator lamp L ₂₈ when pressed will light, transfers i.e. Utsuriho fire signal from the controller 20 is stopped.

When accumulated release switch SW ₂₃ is depressed lit accumulation release indicator lamp L _29, storage operation for the fire monitoring is not performed. When the accumulating operation is not performed, the controller 20 immediately upon receiving a signal representative of the fire information from the wireless sensor 10, it is determined that the fire lighting the fire indicator lamp L _21. When the accumulation release switch SW ₂₃ is not pressed, an operation known as a so-called accumulation operation for fire monitoring is performed, and when the fire information from the wireless sensor 10 is first received, the accumulation indication is displayed first. lamp L ₂₂ is lit, then if the fire information from the wireless sensor 10 is received over a predetermined number of times, or is determined to fire when it is received over a predetermined time, it is determined that the fire fire indicator light L ₂₁ at the time also lights up.

Command open switch SW ₂₄ is connected to switch SW ₂₂
And / or are operated before operating the SW ₂₃ is used to validate the operation of those switches SW _22, SW _23.
Because, because it has a significant meaning will the switch SW ₂₂ and SW ₂₃ is operated fire alert is changed, the command-open switch SW prior to operation of them switch
By giving one cushion in ₂₄ operations, erroneous operation is prevented.

The inspection switch SW ₂₅ is operated to send an optical signal of the sensor test to the sensor 10 when the sensor 10 is tested, and the recovery switch SW ₂₆ performs a recovery operation after a fire or the like. To operate, and buzzer stop switch SW
₂₇ is operated to stop the sounding buzzer.

The wireless detector 10 is a conventional detector that performs smoke detection.
And a sensor adapter for detachably mounting the sensor unit 12 and converting a detection signal or the like received from the sensor unit 12 into an optical signal and transmitting the optical signal, that is, a sensor receiving unit 14. The transmitter / receiver 14 has a controller 20 or a remote
An optical transmission / reception unit 16 for transmitting / receiving an optical signal to / from the controller 30 is provided. The sensor adapter, that is, the sensor transmitting / receiving unit 14 is installed on the ceiling surface, but has a structure that can be changed if necessary.

In this embodiment, a case will be described in which the wireless sensor 10 is configured such that a normal fire detector main body (a thermal type, an ion type, a photoelectric type, etc.) is detachably attached to the sensor transmitting / receiving unit 14. However, it is also possible to constitute a wireless sensor by integrating the fire detector and the transmitting / receiving unit.

Also, since the wireless sensor 10 is a wireless type, a battery is built in as a power source of the wireless sensor itself, so that the circuit of the wireless sensor 10 has a circuit as described later to extend the life of the battery. Have been devised.

In the present embodiment, the remote controller 30 is for causing the wireless sensor 10 to perform a test operation,
A sensor test switch SW ₃₀ which is operated toward the detector 10 remote controller 30 so as to deliver light signals of detector tested against detector 10 when testing the wireless sensor 10, sensor a transmission confirmation indicator lamp L ₃₁ to be turned on for confirmation when operating the test switch SW _30, an optical transmitter 32 for transmitting a test signal light to the wireless sensor 10
And are provided.

Wireless sensor 10 and controller 2 shown in FIG.
0, and the internal circuit of the remote controller 30 are shown in FIGS. 2, 3 and 4, respectively.

In the circuit diagram of the wireless sensor 10 shown in FIG. 2, the portion excluding the fire detector 12 is provided in a sensor adapter, that is, a sensor transmitting / receiving section 14, an MPU 1 is a microprocessor, and a ROM 11 is a program RAM 11 is a working storage area, 101 is a light receiving circuit for receiving a light receiving signal via a light receiving unit (ie, photodiode) PD10 in the optical transmitting and receiving unit 16, and 102 is a light transmitting circuit in the optical transmitting and receiving unit 16 A light emission control circuit that controls light emission of a signal transmitted through the unit (that is, a light emitting diode) LED10. In this embodiment, the light transmission signal uses a 38 KHz carrier wave, and is pulse-modulated and coded for fire information. Signal with near infrared light around 940 nm
It is to be transmitted three times repeatedly.

103 is a recovery circuit for restoring the fire detector 12 that has been operated once, 104 is a fire alarm detection circuit that detects when the fire detector 12 generates an alarm, and 105 is a fire alarm detection circuit that detects the fire. A detector drop detection circuit that detects when the sensor has dropped from the detector adapter 14, a test circuit 106 that tests the fire detector 12, and a test circuit 107 that detects interruption of an optical path as a transmission path, etc. The first one to periodically emit light from the light emitting unit LED10
Is a first timer circuit for setting a time interval of. The first time interval can be set to an appropriate time interval from about 30 seconds to about 30 minutes, but is set to 8 minutes in the present embodiment.

108, test indicator circuit which performs light emission control of the test indicator L ₁ when sensor test is performed, 109, the battery voltage monitoring circuit for monitoring the internal power supply that is, battery voltage, 110 performs the accumulation operation For this reason, the fire detector 12, which monitors the fire every 3.5 seconds, is activated or set when the first fire is detected, and a second time interval slightly larger than 3.5 seconds (4 seconds in this embodiment). ) When the timer counts up.
The second timer circuit 110 is reset every time the fire detector 12 detects a fire every 3.5 seconds to start counting from 4 seconds from the beginning, but if the fire detector 12 no longer detects a fire. Times out after 4 seconds, which can signal that the fire has ceased.

111, based on the operation signal of the installation test set switch SW ₁ which is operated when installing the wireless sensor 10, installed test setting circuit for emitting or receiving an optical signal for installation testing from the optical transceiver 16, IF 101 IFIF111 is an interface.

In the circuit diagram of the controller 20 shown in FIG. 3, the MPU 2 is a microprocessor, the ROM 21 is a program storage area, the RAM 21 is a work storage area, and 201 is an optical signal transmitting unit (that is, a light emitting unit) in the optical transmitting / receiving unit 22. A light emitting control circuit 202 for controlling light emission of an optical signal transmitted from the LED 20; a light receiving circuit 202 for controlling light reception of an optical signal received by the optical signal receiving unit (ie, photodiode) PD20 in the optical transmitting / receiving unit 22; Reference numeral 203 denotes a light emitting diode L in the optical transmitting / receiving unit 22.
A burst light emitting circuit 204 for controlling light emission of a burst light signal emitted from the ED 21 is used for performing an accumulation operation in cooperation with the second timer circuit 110 of the wireless sensor 10 after a fire is first detected. In addition, a first program timer 205, for example, set at a time interval of one minute, cooperates with the first timer circuit 107 of the wireless sensor 10 to detect a light path interruption, second program timer to be set to a time interval, 206, the display lighting control circuit controlling lighting of the display lamp L ₂₁ ~L ₂₉ which is also shown in Figure 1 ringing, 207, to the buzzer B A circuit 208 for transmitting a fire signal or the like to a fire receiver or a telephone transmission terminal, etc., and a transmission circuit 209 for outputting data to the fire receiver or a telephone transmission terminal or the like. Circuit, 210 is also a fire receiver, telephone transmission terminal, etc. Data input circuit for inputting Luo data, 211 is a switch circuit for inputting control contact signal from the switch SW ₂₂ to SW ₂₇ which is also shown in FIG. 1, 212, also specified command in FIG. 1 timer circuit which is activated by the operation of the open switch SW _24, IF201~IF212 is an interface.

In the circuit diagram of the remote controller 30 shown in FIG. 4, the MPU 3 is a microprocessor, the ROM 31 is a program storage area, the RAM 31 is a work storage area, and 301 is an optical signal transmitting unit ( that transmission light emission control circuit for controlling light emission of the light signal sent from the light-emitting diode) LED 30, 303, the timer circuit used to control the lighting time of the indicator lamp L _31, 304, the switch from the switch SW ₃₀ switch input circuit which controls input of a contact, 305, lighting control of the indicator lamp L _31, and a timer circuit 303
A lighting circuit for controlling the lighting time of the indicator lamps, and IF301 to IF305 are interfaces.

In the above configuration, a signal transmission mode will be described first. As will be described below, in the present embodiment, signals transmitted and received between the wireless sensor 10, the controller 20, and the remote controller 30 are transmitted from the wireless sensor 10 to the controller 20 in a fire. Information, inspection completion information, wireless sensor abnormality information (sensor dropout information, voltage drop information), normal information, installation test information, and command information sent from the remote controller 30 to the wireless sensor 10, There are eight signals: a test command as request information, and a burst signal as a test command sent from the controller 20 to the wireless sensor 10. The transmission directions of these eight signals are shown in the following table. They are shown together.

These eight pieces of information can be identified by transmitting them in the form of a 4-bit digital signal. However,
If one controller 20 receives information from two or more wireless sensors 10, the controller 20 determines which sensor has received the information.
The address information may be added to the information signal so that it can be understood. When address information is added, each information signal includes, for example, 4 bits of address information and 4 bits of information content.
It can be 8-bit information of bits.

Since the wireless sensor 10 operates using the built-in battery as a power source as described above, it is necessary to keep current consumption as low as possible. Therefore, the light receiving circuit 101 (including a preamplifier and a signal identification unit) that receives a test request from the remote controller 30 or the controller 20, that is, a test command, cannot always be operated. For this reason, the following method is used to reduce the power consumption and to always receive the test request.

The sending remote controller 30 sends a strong time-series pulse while the test request switch of the remote controller 30 is pressed. The light receiving section on the sensor side receives the pulse light with a large area light receiving element via a filter and a condenser lens, and directly drives the comparator by the starting force of the element itself.

The comparator activates the reception determination circuit by receiving light at a certain level or more, determines the time series of the pulse, and starts a self-inspection or a self-test if it is a test command.

In this method, the preamplifier section of the light receiving section can be omitted, power consumption can be reduced, and the receiving circuit can be simplified and the cost can be reduced.

The receiving unit activates the reception determination circuit according to the amount of light (infrared light) even when light is received from a light source other than the remote controller 30, but in the case of a signal from the remote controller 30,
This is a predetermined pulse light, and can be identified relatively easily.

Hereinafter, the operation of FIGS. 2 to 4 will be described with reference to the flowcharts of FIGS. 5A, 5B, 6, 6, 7A, 7B, and 8. accumulated release switch SW ₂₃ has not been operated, the system is assumed to perform the fire detection operation by the accumulation type, also Utsuriho stop switch SW ₂₂ of the controller 20 has not been operated,
The description proceeds assuming that the system is in a state where it is possible to notify the fire receiver and the telephone transmission terminal.

FIGS. 5A and 5B are flow charts for explaining the operation of the wireless sensor 10, in which V ₁ and V ₂ of FIG. 5A are connected to V ₁ and V ₂ of FIG. Construct a flowchart.

Initial settings are made first (step 502), and then
The process enters an interrupt waiting state (step 504).

If there is an interrupt input (step 506), it is a fire interrupt (step 508), a drop-out interrupt (step 530), a voltage drop interrupt (step 534), or a first timer interrupt (step 506). 538), light reception interrupt (step 542), second timer interrupt (step 550), installation test interrupt (step 55)
4) is determined, and after the corresponding interrupt content is processed, the process returns to the interrupt standby state.

6, 7A and 7B are flowcharts for explaining the operation of the controller 20. In FIG. 6, first, initial setting is performed (step 601), and thereafter, whether or not there is a switch interrupt (step 602), whether or not there is a light receiving signal (step 604), the first program
Whether there was a timer interrupt (step 606), and whether there was a second program timer interrupt (step 606)
616) is determined.

If there is a light receiving signal (Y in step 604), that is, if it is determined that the light receiving signal is received by the photodiode PD20 and that it is captured via the light receiving circuit 202 and the interface IF 202, FIG. 7A The received light signal processing (step 700) shown in FIG. In the received light signal processing (step 700) in FIG. 7A, the received light signal is a fire signal (step 702) or an abnormal signal (step 72).
4) It is determined whether the signal is a voltage drop signal (step 730), a normal signal (step 734), or an inspection completion signal (step 740), and processing corresponding to each light receiving signal is performed.

If there is a switch interruption (step 602)
(Y), a switch interrupt process (step 701) shown in more detail in FIG. 7B is performed. In the switch interrupt processing in Figure 7B, or an interrupt caused by any of the switches SW ₂₂ to SW ₂₇ is operated it is determined, engineered switch SW
Processing corresponding to _{22 to} SW ₂₇ is performed.

Here, the switch SW ₂₂ and SW ₂₃ are those timer circuit 212 is effective only when it is operated while operating, the timer circuit 212 operates by the operation of the command open switch SW ₂₄ This is automatically cleared after a predetermined time has passed. That is, the transfer stop switch SW
_{Since the} switches of ₂₂ and the accumulation release switch SW ₂₃ change the fire monitoring operation system by their operation, operate these switches so that such system changes are not inadvertently performed. to time by operating the first command open switch SW ₂₄ before that, moreover the after operation of the switch SW _24, the operation only for a predetermined time so as to be effective, so as to have the certainty of the operation It was done.

Therefore, when the first switch interrupt occurs, the timer circuit
212 is not operating (N in step 752), check switch SW ₂₅ (step 770), recovery switch SW ₂₆ (step 7
80), buzzer stop switch SW ₂₇ (step 790), and command open switch SW ₂₄ (step 794),
Is determined only as to whether or not an interrupt has occurred due to operation of the switch, and processing corresponding to the switch determined to have been operated is performed.

Interrupt occurs, (Y in step 794) when it is due to the operation of the command-open switch SW _24, the timer circuit 212 is turned on that is, the operation (step 796),
While the timer circuit 212 is operated again, when the interrupt by the switch operation occurs (Y in step 602), since this time is in the timer operation (Y in step 752), the switches SW ₂₂ and SW ₂₃ Is determined only.

If in the case of interrupt generation by the operation of Utsuriho stop switch SW ₂₂ (Y in step 754), Utsuriho prohibition instruction (step 756). Otherwise (N in step 754),
Utsuriho prohibition cancel command (step 758), is output to Utsuriho circuit 208, and when the interrupt occurs by the operation of the storage release switch SW ₂₃ (Y in step 760), the accumulation flag is cleared (step 762) If not (N in step 760), the accumulation flag is set. afterwards,
The timer circuit 212 is cleared (step 766), and the ringing circuit is operated for a short time (step 768).

FIG. 8 is a flowchart for explaining the operation of the remote controller 30.

After the initial setting is first performed (step 802), the apparatus enters an interrupt standby state (step 804). Since the role of the remote controller 30 is to send test request information to the wireless sensor 10, the sensor test switch SW
_When an interrupt occurs due to operation of ₃₀ (step
806 and Y in step 808), the test signal is set in the interface IF301, and the transmission light emission control circuit 301 is set.
From the light-emitting diode LED30 via the
10) After that, the test request information is sent to the remote controller
Transmission confirmation indicator lamp L ₃₁ to inform the operator that it is indeed sent from the 30 second predetermined time, lit (step 812, 814 and 816).

The operation of the wireless sensor 10, the controller 20, and the remote controller 30 in a state in which any interruption occurs while waiting for the interruption will be described below.

Installation Test First, the operation of the installation test will be described.

When installing the system for the first time,
To artificially adjust the light receiving sensitivity of the optical signal between the controller 10 and the controller 20, the wireless sensor 10 shown in FIG.
Installation test setting switch SW ₁ of is operated manually. The switch operation signal is taken into the microprocessor MPU1 side by the installation test setting circuit 111 via the interface IF111 as an installation test setting signal (Y in step 554), whereby the installation test signal is sent to the light emission control circuit 102 via the interface IF102. Is set, a predetermined light output is emitted from the light emitting diode LED10 (step 556). The wireless sensor 10 and the controller are set so that this optical output is optimally received by the controller 20.
It is possible to artificially adjust the facing relationship with 20,
In this way, the light receiving sensitivity between the controller 20 and the wireless sensor 10 is adjusted. Such an adjustment is complete installation test set switch SW ₁ is opened manually, the was opened in the switch SW ₁ is detected (Step 5
58 Y), light emission control circuit 102 (interface IF102)
Is cleared (step 560), and after the first timer circuit 107 is reset (step 520) for the reason described later, the process returns to the interrupt waiting state (step 52).
2).

System Setting In the present embodiment, an operation will be described in which the system is operated in a storage mode and the fire information received by the controller 20 is transmitted to a fire receiver (not shown), a telephone transmission terminal, or the like. That is, in order to set such an operation condition, both Utsuriho stop switch SW ₂₂ and the storage release switch SW ₂₃ of the controller 20 is left not operated. However, if it is desired to cancel the storage method at the time of initial setting of the system or at other times, and to perform fire monitoring in the transfer prohibited state, first, as described above, Open switch SW
₂₄ is operated, and then, within a predetermined time, the transfer stop switch
The desired one of SW ₂₂ and / or the accumulation release switch SW ₂₃ is operated, and thus the setting of the system can be changed.

Test operation For example, after the light sensitivity adjustment at the time of installation is completed, or when performing an operation test of the wireless sensor 10 such as a periodic inspection,
By pointing the remote controller 30 toward the wireless sensor 10 and operating the sensor test switch SW ₃₀ of the remote controller 30 (Step 808, Y: FIG. 8), the test signal is wirelessly sensed from the optical transmitter 32. The light is emitted from the device 10 (step 810), or the inspection switch SW ₂₅ of the controller 20 is operated (Y in step 770: FIG. 7B), and the burst signal as the test signal is transmitted to the burst emission circuit 203 of the controller 20. Is turned on to emit light from the light emitting diode LED21 to the wireless sensor 10 (step 772).

If there is a light receiving interrupt on the wireless sensor 10 side, that is, a light receiving signal is detected via the photodiode PD10, the light receiving circuit 101, and the interface IF101, and this is a sensor test signal from the remote controller 30 or a sensor test signal from the controller 20. If it is determined that the signal is a burst signal (Y in step 542), a test or check signal is set in the test circuit 106 via the interface IF 106 (step 544), a check flag is set (step 546), and the test is being performed. and turns on the test indicator lamp L ₁ by setting the test indicator circuit 108 via the interface IF108 to indicate that this is (step 548). Then, after resetting the first timer circuit 107 described later (step 520), the process returns to the interrupt waiting state (step 522).

When a test or check signal is set in the test circuit 106 (step 544), the test circuit 106 starts operating and automatically tests its wireless sensor 10. That is, when the fire detector 12 is a scattered light type smoke detector that receives scattered light of smoke and outputs a signal, for example, a scattered light emitted from a test light emitting element (not shown) provided in the smoke detector. In the case of a thermal sensor, a test operation such as automatic heating by a built-in heater is performed. Since these test operations are ordinary techniques, they will not be described in detail here.
108940 and JP-A-59-210347). In this embodiment, a scattered light type smoke detector will be described below as an example. Therefore, pseudo scattered light, that is, light equivalent to scattered light due to smoke is emitted from the test light emitting element by the operation of the test circuit, and if the fire detector 12 normally performs fire detection, the pseudo scattered light is emitted. When the light is received by the light receiving unit (not shown), a fire signal is output, which is detected by the fire alarm detection circuit 104, and a fire interrupt occurs (Y in step 508).

When a fire interrupt occurs, it is determined whether or not the inspection flag is set (step 510). Since the test is currently being performed and the inspection flag is set in step 546, the determination here is “Yes”, ie, It becomes "Y". Therefore, a check completion signal is set to the light emission control circuit 102 via the interface IF 102 (step 512), whereby a light signal indicating that the check or test has been normally completed is transmitted from the light emitting diode LED 10 to the controller 20. Is done.

If an optical signal indicating that the test was completed successfully, that is, a check complete signal, is sent,
Test indicator circuit 108 via the IF108 is with test indicator L ₁ is cleared is turned off (step 514), check flag is cleared (step 516), and in order to recover the fire detector 12 which is fire operation The restoration circuit 103 is set via the interface IF103 (step 518). Finally, the first timer circuit 107, which will be described later, is reset (step 520), and returns to the interrupt waiting state (step 522), whereby the fire detector 12 is tested by the light receiving interrupt (Y in step 542). Ends.

When the check completion signal transmitted from the wireless sensor 10 in step 512 is received by the controller 20 (step
740 Y), Utsuriho injunction to Utsuriho circuit 208 is outputted (step 742), the fire indicator lamp L ₂₁ and test indicator lamp L ₂₃ is turned on (step 744), and the ringing circuit 207 is operated briefly Buzzer B sounds for a short time (step 746).
The operator can know that the test result is good by the series of lighting and sounding operations. Thereafter, the fire indicator lamp L ₂₁ and test indicator lamp L ₂₃ is turned off (Step 74
8), the transfer circuit 208 returns to the state before receiving the inspection completion signal, that is, in the case of the present embodiment, the state in which the transfer prohibition command has been released (step 750).

Fire Operation Next, an operation when an actual fire abnormality occurs will be described. As described above, in the present embodiment, the fire detection method is accumulation-type smoke detection.

That is, the fire detector 12 of the wireless sensor 10 is a scattered light type smoke detector, and includes a light emitting unit and a light receiving unit (not shown).
Light is emitted every 4 seconds (in this embodiment, every 3.5 seconds)
When a predetermined amount or more of smoke is present, a smoke detection signal is output by detecting scattered light scattered by the smoke from the light emitting unit and reaching the light receiving unit. Each time a smoke detection signal is output from the scattered light type smoke detector 12, the wireless sensor 10 converts the smoke detection signal into an optical signal and sends it as a fire signal from the photodiode PD10 to the controller 20.

In this connection, the wireless sensor 10 has a second predetermined time period for monitoring whether the fire abnormality has been eliminated and the fire detector 12 no longer outputs the smoke detection signal, that is, the fire abnormality signal. For example, a second timer circuit 110 is provided which counts 4 to 6 seconds (in this embodiment, 4 seconds) slightly larger than 3.5 seconds and times out. The second timer circuit 110 is reset every time a predetermined amount or more of smoke is detected in the detection operation every 3.5 seconds. If not, the time will be
Up. Due to the time-up of the second timer circuit 110, the wireless sensor 110 sends a normal signal to the controller 20.
It can be known that the smoke detector 12 no longer detects the smoke detection signal.

In the controller 20, when a normal signal is not transmitted for a predetermined time (1 minute in this embodiment) after the smoke detection signal, that is, the fire signal is transmitted from the wireless sensor 10 for the first time, It is determined that a fire abnormality has occurred. That is, the controller 20 is provided with a first program timer 204 which starts a counting operation upon receiving the first smoke detection signal, that is, a fire signal, and times up when one minute is counted. The program timer 204 is cleared when a normal signal transmitted from the wireless sensor 10 is received. Therefore, 1
If the normal signal is not sent to the controller 20 without the time-up of the second timer circuit 110 due to the fire detector 12 continuing to output the smoke detection signal intermittently for a minute. Is the first program timer 20
4 will be timed out and the abnormal fire action will be taken.

As described above, when a normal signal is not generated for one minute after the first fire signal is received, that is, when a fire signal is continuously generated for one minute, a fire abnormal operation is performed. It is possible to avoid false alarms when the first smoke detection signal is transient smoke such as cigarettes.

Hereinafter, the fire abnormal operation will be described in more detail based on the actual operation.

First, the operation of the wireless sensor 10 will be described. A fire alarm detection circuit indicates that the smoke detector 12 has output a smoke detection signal due to the presence of smoke exceeding a specified amount between a light emitting unit and a light receiving unit (not shown). If 104 is detected, a fire interrupt occurs (Y in step 508). When a fire interrupt occurs, it is determined whether or not the inspection flag is on. However, since it is not a test, the inspection flag is off (N in step 510). Therefore, a fire signal is set in the light emission control circuit 102 via the interface IF102 (step 52).
4) Due to this, a light signal indicating a fire abnormality is transmitted from the light emitting diode LED10 to the controller 20.

When a light signal indicating a fire abnormality, that is, a fire signal is transmitted, the recovery circuit 103 is set via the interface IF103 in order to cause the fire detector 12 to perform the fire monitoring operation again after 3.5 seconds (step 526). Then, the fire detector 12 which has operated the fire is restored, and the second timer circuit 110 is set via the interface IF110 (step 528). The second timer circuit 110 starts counting for 4 seconds by being set. Finally, a first timer circuit 107 described later is reset (step 52).
0), and returns to the interrupt waiting state (step 522).

If a fire is abnormal, that is, if smoke exceeding a specified amount persists, the fire alarm detection circuit 104 detects the smoke detection signal from the fire detector 12 again after 3.5 seconds, and a fire interrupt occurs (step 508). Y), a fire signal is sent to the controller 20 (step 524), and the operation of sending the fire signal continues as long as the fire is abnormal, that is, as long as a specified amount of smoke persists. Each time, the second timer circuit 110 is reset (step 528), and when the time is up after the elapse of 4 seconds, the second timer interrupt (step 550) is generated and the controller 20 becomes normal. No signal is sent. Thereafter, a fire signal is continuously transmitted to the controller 20 every 3.5 seconds. As described above, one minute after the first fire signal is received, the controller 20 determines that an actual fire has occurred and issues a fire alarm. An appropriate fire abnormal operation such as performing

However, if the fire abnormal state disappears on the way, no fire interruption by the fire alarm detection circuit 104 occurs, and the second timer circuit 110 is not set or reset, so that the second predetermined time, that is, 4 seconds, When the time has elapsed, the time is up, and a second timer interrupt is generated via the interface IF 110 (Y in step 550). When the second timer interrupt occurs, a normal signal is set in the light emission control circuit 102, and a light signal indicating normal is transmitted from the light emitting diode LED10 (step 552). When the optical signal indicating normality is received, the controller 20 releases the accumulation operation for issuing a fire alarm, that is, the time counting for one minute.

Next, the operation of the controller 20 will be described. In this embodiment, the accumulation flag is set (step 76).
4) Since the case where the apparatus operates in the accumulation mode and is set to the movable state (step 758) is described, a fire abnormal state occurs and the fire signal transmitted from the wireless sensor 10 (step 524) Is first received by the controller 20 (Y in step 702), it is determined whether or not the current mode is the accumulation mode.
704, Y). Therefore, next, the first program timer 2
04 is started (step 708), indicator lamp L ₂₂ indicating that the accumulation
Is turned on (step 710), the second program timer 205 described later is stopped (step 712), and the process returns to step 604 to wait for the next light reception signal while the first program timer 204 and the second program timer 205 are stopped. Program timer 205
Is monitored (steps 606 and 616).

The next light receiving signal is received (Y in step 604), and if it is determined that the signal is a fire signal (Y in step 702), the first program timer 204 is activated (step 706). (Y), simply stopping the second program timer 205 (step 712) returns to the state of waiting for the next light receiving signal (step 60).
4) During this time, the first program timer 204 continues counting time.

In the wireless sensor 10, if the fire abnormal condition continues and sends out the fire signal (step 524) every 3.5 seconds, the first program timer 204 in the controller 20 continues counting the time, and then, When one minute has elapsed, the first program timer 204 outputs a time-up signal, and a first program timer interrupt occurs (Y in step 606). Thus, the fire indicator lamp L ₂₁ is turned together with the accumulated Showing lamp L ₂₂ is turned off (Step 6
08), the buzzer B is caused to sound by operating the sounding circuit 207 (step 610), and in this embodiment, since the transfer is enabled (N in step 612), a fire signal is sent to the transfer circuit 208. For example, a so-called fire operation is performed by adding a self address and outputting the result (step 614), so that a fire notification is performed to a fire receiver or a telephone transmission terminal (not shown). You.

Also, if you first receive a fire signal (step
While the first program timer 204 performs the time counting operation (Y in step 706) while the first program timer 204 is performing the time counting operation (Y in step 706), the fire monitoring is performed every 3.5 seconds if the abnormal condition of the wireless sensor 10 disappears. The sensor 12 does not output the fire abnormality signal (N in Step 508), and the setting of the second timer circuit 110 (Step 528) is not performed. Therefore, after 4 seconds, the interruption of the second timer circuit 110 ( Step 550) occurs, and a normal signal is transmitted (step 552).

When the normal signal transmitted in this way from the wireless sensor 10 is received by the controller 20 (step 73).
4) accumulation in indicator L ₂₂ is turned off (step 736), a second program timer 205 first program timer 204 is cleared and later is set again (step 738), to Thus, the accumulation operation in the controller 20 ends.

In the above description has been described fire operation in the accumulation mode, (N in step 704). If not, the accumulation mode, and the fire indicator lamp L ₂₁ receives the first fire signal is turned on (step 716), The ringing circuit is operated (step 718), and if the transfer is not prohibited (N in step 720), a fire operation of outputting a fire signal to the transfer circuit 208 (step 722) is immediately performed.

Restoring Operation After that, in order to perform a restoring operation such as after a countermeasure against a fire condition is performed, the restoring switch SW ₂₆ of the controller 20 is operated (Y in step 780). When recovery switch SW ₂₆ is operated, the fire indicator lamp L ₂₁ is turned off (step 782), and a first program timer 204 is cleared a second program timer 205 is set again (step 784), The sounding circuit 207 is turned off (step 78
6) Finally, the ringing circuit 207 is operated for a short time to confirm the recovery operation (step 788). As a result, the state is returned to the normal fire monitoring state.

Incidentally, this recovery operation, since the operation also turns off the display lamp L ₂₁ ~L ₂₆ are to be performed, which will be described later optical path blocking abnormal, the voltage drop abnormality of sensor cells, or the falling or the like sensor abnormality Light path cutoff indicator lights when
L ₂₄ , Sensor battery replacement indicator light L ₂₅ , Sensor malfunction indicator light L ₂₆
The recovery switch SW ₂₆ is also used for turning off the indicator light such as
Is operated.

Next, an operation when a dropout abnormality occurs will be described. In the wireless sensor 10, between the fire detector 12 and the sensor adapter 14, for example, an abnormality related to an installation state such as a poor contact or a drop has occurred, and a sensor drop detection circuit 105 Detects this, the falling-off abnormal signal is taken into the microprocessor MPU1 via the interface IF105, thereby causing a falling-off interrupt (step 530).

When a drop interruption occurs (Y in step 530), an abnormal signal is set in the light emission control circuit 102 and the light emitting diode LED
An optical signal indicating an abnormality is transmitted from 10 (step 53).
2). Thereafter, the first timer circuit 107 is reset (step 520), and returns to the interrupt waiting state (step 522).

When the abnormal signal transmitted from the wireless sensor 10 in this way is received by the light receiving circuit 202 of the controller 20 (Y in step 724), the sensor abnormality is displayed via the interface IF 206 and the indicator light lighting control circuit 206. lamp L ₂₆ is turned on (step 726), and ringing circuit 207 is operated briefly (step 728). The lighting of the sensor abnormality indicator lamp L _26, the operator or administrator can know the contact failure between the fire detector 12 and the sensor adapter 14.

Note that detection of sensor dropout is a common technique and will not be described in detail here (for example, see Japanese Utility Model Publication No. Sho 54-24622 and Japanese Utility Model Publication No. Sho 56-47758). When the wireless sensor 10 has an integral structure, dropout detection becomes unnecessary.

Voltage drop abnormality When the battery voltage monitoring circuit 109 detects a voltage drop of the built-in battery used for both the fire detector 12 and the detector adapter 14 in the wireless detector 10, the detection signal is sent to the interface IF109. Is taken into the microprocessor MPU1 via the CPU, a voltage drop interrupt (step 534) occurs. When a voltage drop interrupt occurs (Y in step 534), a voltage drop signal is set in the light emission control circuit 102, and an optical signal indicating a voltage drop is transmitted from the light emitting diode LED10 (step 536). Thereafter, the first timer circuit 107 is reset (step 520),
The process returns to the interrupt waiting state (step 522).

When the voltage drop signal transmitted from the wireless sensor 10 is received by the controller 20 (Y in step 730), sensor battery replacement indicator L ₂₅ is turned on (step 732), ringing circuit 207 is operated briefly (Step 728), whereby the operator can know that the battery of the wireless sensor 10 should be replaced.

Next, an operation in a case where an optical path is interrupted between the wireless sensor 10 and the controller 20, that is, in a case where transmission and reception of a signal between the wireless sensor 10 and the controller 20 cannot be performed will be described.

On the wireless sensor 10 side, a first timer circuit 107 that outputs a first predetermined time lapse signal (eight minute lapse signal) by time-up every time when counting a first predetermined time, for example, eight minutes, is provided. Provided. Each time the first timer circuit 107 outputs the first predetermined time elapsed signal every eight minutes, a first timer interrupt occurs (Y in step 538), and the light emission control circuit 102
Is set to the normal signal, a normal signal is transmitted from the wireless sensor 10 by the light emitting diode LED10 (step 540). When the normal signal is transmitted, the first timer circuit 107 is reset (step 52).
0) Start counting 8 minutes from the beginning again.

On the controller 20 side, when a certain time longer than 8 minutes (first predetermined time) is counted, for example, 17 minutes which is slightly more than twice in this embodiment, the time is up and a second light path cutoff signal is output. A program timer 205 is provided, and the second program timer 205 is reset each time a normal signal from the wireless sensor 10 is received by the controller 20.

Accordingly, when the optical path is not interrupted, the second program timer 20 provided on the controller 20 side is provided.
5 is reset by the normal signal (Y in step 734) received at least every 8 minutes (step 73).
8) There is no time-up, and no second program timer interrupt occurs (N in step 616). If the normal signal is not transmitted from the wireless sensor 10 due to the interruption of the optical path and the second program timer 205 of the controller 20 times out after elapse of 17 minutes, the second program timer an interrupt is generated (Y in step 616), the optical path blocking indicator L ₂₄ is turned on (step 618), ringing circuit 207 operates briefly (step 620), the optical path blocking occurs in this way Let them know.

The setting time of the second program timer 205 is 8
The value of 17 minutes, which is slightly more than twice the value of 17 minutes, is such that when the wireless sensor 10 sends out a normal signal, it is not possible to say that there is an optical path interruption abnormality such as a person just passing between optical paths. This prevents the controller 20 from receiving a normal signal due to such accident, thereby preventing the second program timer 205 from time-up at an early stage and generating an erroneous abnormal signal. It is in.

In order to check the optical path, the first timer circuit 107
Is not limited to the normal signal output from the wireless sensor 10 due to the time-up every eight minutes, the signal emitted from the wireless sensor 10 is surely received by the controller 20 regardless of the type of signal. It is only necessary to be able to confirm that For this reason, each time a light signal is emitted by the light emission control circuit 102 of the wireless sensor 10 (steps 512, 524, 532, 536, 552, 556), the first timer circuit 107 is reset (step 512). 520) In order to transmit a normal signal for checking the optical path, an additional 8 minutes are counted from the signal. As a result, power for transmitting a useless optical signal from the wireless sensor 10 can be omitted, thereby extending the life of the built-in battery.

Buzzer stop When the buzzer stop switch SW ₂₇ of the controller 20 is operated (Y in step 790), the sound circuit 207 is turned off, and if the buzzer B sounds, the sound stops.

In the above embodiment, the wireless sensor 10 is operated by the built-in battery. However, the power may be obtained from a commercial power supply. In this case, a built-in rechargeable battery for backup in the event of a power outage may be incorporated.
It is preferable to replace the battery voltage monitoring circuit 109 with a power failure monitoring circuit. Further, information other than a fire signal such as an abnormal signal, a voltage drop (power failure) signal, an optical path cutoff, a buzzer stop, and a release of accumulation may be output to a receiver or the like via a data output circuit or a transfer circuit. .

[Effects of the Invention] As described above, according to the present invention, all information signals sent from the fire detection unit and request signals sent from the mobile transmission unit are converted into optical signals and transmitted cordlessly, that is, wirelessly. The degree of freedom of installation can be greatly expanded, and since it is an optical signal, there is an effect that noise resistance and high reliability against transmission failure are obtained.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a configuration of an optical wireless fire alarm system according to one embodiment of the present invention, FIG. 2 is a diagram showing an internal circuit of the wireless sensor 10 shown in FIG. Third
FIG. 4 is a diagram showing the internal circuit of the controller 20 shown in FIG. 1, FIG. 4 is a diagram showing the internal circuit of the remote controller 30 shown in FIG. 1, and FIGS. 5A and 5B are 6, 7A and 7B are flowcharts for explaining the operation of the controller 20, and FIG. 8 is a flowchart for explaining the operation of the remote controller 30. 3 is a flowchart for performing the operation. In the figure, 10 is a wireless sensor, 16 is an optical transceiver of the wireless sensor, 20 is a controller, 22
Is an optical transmission / reception unit of the controller, 30 is a remote controller, and 32 is an optical transmission unit of the remote controller.

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI H04B 10/105 10/22 (72) Inventor Kiyotaka Fujii Nomi Disaster Prevention Industry Co., Ltd. 4-73 Kudanminami, Chiyoda-ku, Tokyo (72) Inventor Tatsumi Asano 4-73-3 Kudanminami, Chiyoda-ku, Tokyo Nomi Disaster Prevention Industry Co., Ltd. (56) References JP-A-63-1332 (JP, A) JP-A-56-50495 (JP, A) (58) Field surveyed (Int.Cl. ⁶ , DB name) G08B 25/01

Claims (2)

(57) [Claims] 1. A fire phenomenon detecting means for outputting fire information when a fire is detected, a fire information transmitting means for converting the fire information obtained by the fire phenomenon detecting means into an optical signal and spatially transmitting the signal, and a spatial transmission. Receiving a light signal to be received, a response means for converting the requested information into an optical signal and spatially transmitting the light, and a light receiving means for receiving an optical signal spatially transmitted from the fire detecting part, Requesting means for converting the content of the request into an optical signal and spatially transmitting the signal to the fire detecting section; and a receiving section having a determining section for determining and outputting the signal received by the light receiving section. Fire alarm equipment. 2. Fire information detecting means for outputting fire information when a fire is detected, fire information transmitting means for converting fire information obtained by the fire phenomenon detecting means into an optical signal and spatially transmitting the same, and spatial transmission. A fire detection unit having a response unit for receiving the requested optical signal, converting the requested information into an optical signal, and spatially transmitting the signal, a light receiving unit for receiving the spatially transmitted optical signal, and a request light for requesting the content of the request. A receiving unit having a requesting unit for converting the signal into a signal and spatially transmitting the signal to the fire detecting unit, and a determining unit for determining and outputting the signal received by the light receiving unit; A fire alarm system, comprising: