Sound equipment and automatic fire alarm systems

Abstract

To obtain an acoustic device and an automatic fire alarm system having an operation test function related to ringing.SOLUTION: An acoustic device has a motor, a bell, and a ringing mechanism, wherein the ringing mechanism is driven by applying a drive voltage to the motor from an outside to ring the bell. The acoustic device also has an operation confirmation circuit which includes: a first circuit for detecting a state where an operation test voltage has been applied from the outside; and a second circuit for detecting whether or not the motor or the ringing mechanism shows a normal behavior corresponding to the operation test voltage when the operation test voltage is applied.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to an acoustic device with an operation test function and an automatic fire alarm system including an acoustic device with an operation test function. [Background technology]

[0002] There is an automatic fire alarm system that is configured with a receiver, a transmitter, a repeater, an acoustic device, a sensor, etc., and protects people inside a building or other object that is subject to fire protection from fire (see, for example, Non-Patent Document 1). In an automatic fire alarm system, the sensor detects heat or smoke and sends a fire signal to the receiver. The receiver that receives the fire signal issues an alarm and activates the acoustic device depending on the location of the fire, thereby notifying people inside the object that a fire has occurred. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Nohmi Bosai Co., Ltd. website, Automatic Fire Alarm System (URL: https: / / www.nohmi.co.jp / product / materiel / fid.html) Summary of the Invention [Problem to be solved by the invention]

[0004] Such automatic fire alarm systems are subject to installation standards set according to the purpose and scale of the fire protection target, and are also required to undergo regular legal inspections.Regarding the emergency bells installed in the sound devices included in the automatic fire alarm systems, legal inspections are required to check their ringing once every six months and their ringing and sound pressure once a year.

[0005] When checking the operation and sound pressure of emergency bells, consideration must be given to facility users, so work that produces noise is often done at night or on holidays. Therefore, in order to ensure a healthy working environment for inspectors and reduce overtime, it is strongly recommended to reduce the amount of work done at night and on holidays.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide an acoustic device and an automatic fire alarm system that are equipped with an operation test function for sounding. [Means for solving the problem]

[0007] The acoustic device according to the present disclosure includes a motor, a bell, and a ringing mechanism, and is configured such that an external drive voltage is applied to the motor to drive the ringing mechanism and ring the bell, During the operational test of the sound equipment, the driving voltage is applied via the same wiring route as that used for fire monitoring. An external voltage for operational testing was applied When Detect whether the motor or sound mechanism behaves normally in response to the operating test voltage Operation check circuit Further When the operation check circuit detects that the current flowing through the motor corresponds to the operation test voltage or that the sound mechanism is driven in accordance with the operation test voltage, it executes a detection process to output a confirmation result indicating normal behavior. It is something.

[0008] The automatic fire alarm system according to the present disclosure includes a plurality of acoustic devices according to the present disclosure, and further includes a fire receiver that applies a drive voltage to each of the plurality of acoustic devices during fire monitoring to ring the bell of the acoustic device, and applies an operational test voltage during an operational test to cause a detection process to be performed by an operational confirmation circuit. [Effects of the Invention]

[0009] According to the present disclosure, it is possible to obtain an acoustic device and an automatic fire alarm system that are equipped with a function for testing the operation of sounds. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is an overall configuration diagram of an automatic fire alarm system including an acoustic device according to a first embodiment of the present disclosure. [Figure 2] 1 is a functional block diagram of an audio device according to a first embodiment of the present disclosure. [Figure 3] 1 is a flowchart showing a series of processes related to a sound confirmation method executed in an automatic fire alarm system according to the first embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, preferred embodiments of the acoustic device and automatic fire alarm system of the present disclosure will be described with reference to the drawings. The acoustic device and automatic fire alarm system disclosed herein have a technical feature in that they are equipped with a function to automatically determine whether the acoustic device has a disconnection or operational abnormality based on an operational test voltage applied from the outside at a desired timing.

[0012] Embodiment 1 First, the overall system will be described. 1 is a diagram illustrating the overall configuration of an automatic fire alarm system including an acoustic device according to a first embodiment of the present disclosure. A fire receiver 10 is connected to an addressable transmitter 20, fire detectors 31 and 32, a detector repeater 40, and a smoke control repeater 50 via a signal line SG1.

[0013] A plurality of fire detectors are connected to the detector repeater 40. Two fire detectors 41 and 42 are shown in Fig. 1. A fire door 51, a smoke exhaust machine 52, a shutter 53, and a hanging wall 54 are connected to the smoke prevention and exhaust control repeater 50.

[0014] The fire control signal receiver 10 is also connected to the audio devices 61 and 62 and the audio device repeater 70 via a signal line SG2. A plurality of audio devices are connected to the audio device repeater 70. In FIG. 1, two audio devices 71 and 72 are shown as an example.

[0015] Here, the fire detectors 31, 32 and the fire detectors 41, 42 correspond to a plurality of fire detectors that detect the occurrence of a fire in each of the preset fire monitoring areas.

[0016] In addition, the fire door 51, smoke exhaust fan 52, shutter 53, and drop wall 54 operate in conjunction with the detection results of each of the multiple fire detectors, and function to prevent the spread of fire, smoke, etc.

[0017] The sound devices 61, 62 and the sound devices 71, 72 correspond to a plurality of local sound devices that notify the occurrence of a fire in each of the predetermined local areas.

[0018] Address information for identifying each individual fire detector is assigned in advance to each of the multiple fire detectors. Each of the multiple fire detectors can transmit fire-related information including the address information assigned to it to the fire control panel 10. Meanwhile, the fire control panel 10 can transmit required information to a desired fire detector by adding address information to the information.

[0019] Furthermore, each of the multiple terminal devices is assigned address information in advance to identify the individual terminal device. Therefore, the fire control device 10 can transmit a command to operate the desired terminal device by adding the address information and transmitting the information.

[0020] Furthermore, each of the multiple audio devices is assigned address information in advance to identify the individual audio device. Therefore, the fire control signal receiver 10 can send a command to activate a desired audio device by adding address information and transmitting the information.

[0021] With this configuration, the fire receiving device 10 collects fire-related information from a plurality of fire detectors installed in various predetermined fire monitoring areas and the addressable transmitter 20. Then, the fire receiving device 10 can issue a fire alarm and activate a group of terminal equipment based on the collected fire-related information.

[0022] Furthermore, the fire receiver 10 can ring the bells of the sound devices installed in areas where an alarm is required based on the collected fire-related information. Each of the multiple sound devices is pre-defined as to which fire detector's detection result it will activate.

[0023] Also, although not shown in the figure, the fire receiver 10 can output an alarm signal based on the collected fire-related information, activate fire extinguishing equipment to begin fire extinguishing operations, issue a fire alarm or provide evacuation guidance using an emergency broadcast device, and transmit fire-related information to a higher-level device via a network.

[0024] In the first embodiment, the operation for performing the sound confirmation function for the local sound device in the automatic fire alarm system will be specifically described with reference to Fig. 1, but the operation test subject according to the present disclosure is not limited to the local sound device. Although not shown in Fig. 1, it is also possible to execute the sound confirmation function at a desired timing for the sound confirmation of the main sound device.

[0025] The sound device included in the automatic fire alarm system with such a configuration is required to undergo a legal inspection to check the sound operation and sound pressure. At present, the legal inspection requires that the bell be rung to be tested.

[0026] However, if it were possible to conduct tests related to the ringing at a desired timing outside of statutory inspections, without ringing the bell or by ringing the bell at a low volume and for a short time, it would be possible to discover abnormalities before the statutory inspection and prepare for repairs before or during the statutory inspection. Furthermore, if it were possible to easily detect whether the sound device has a broken wire or an abnormal operation while suppressing the volume emitted from the sound device during statutory inspections, it is expected that the workload of inspectors could be reduced.

[0027] Therefore, a detailed description will be given of an acoustic device and an automatic fire alarm system having a configuration capable of performing a sound confirmation function at a desired timing. Fig. 2 is a functional block diagram of an acoustic device according to the first embodiment of the present disclosure. The acoustic device 200 shown in Fig. 2 corresponds to the local acoustic device shown in Fig. 1 or a main acoustic device (not shown).

[0028] Acoustic device 200 includes motor 201, ringing mechanism 202, bell 203, and operation confirmation circuit 204. When a drive voltage is applied to motor 201 from the outside, ringing mechanism 202 is driven and rings bell 203. For example, ringing mechanism 202 has a gear and a gong, and the gong is driven by operation of motor 201, and the gong strikes bell 203, causing bell 203 to ring. Furthermore, acoustic device 200 according to the first embodiment includes operation confirmation circuit 204 for implementing a ringing confirmation function.

[0029] The operation check circuit 204 includes a first circuit 204a and a second circuit 204b. The first circuit 204a is a circuit that executes a detection process to detect the state in which an operation test voltage is applied from the outside and output the check result. Specifically, the first circuit 204a checks whether the operation test voltage, which is applied via the same wiring path as the wiring path that receives the drive voltage during fire monitoring, during the operation check has been received within the allowable voltage range and outputs the check result.

[0030] The second circuit 204b is a circuit that executes a detection process to detect whether the motor 201 behaves normally in response to an externally applied operational test voltage, and to output the result of the detection. Specifically, the following methods 1 to 3 are possible.

[0031] As a first method, when a voltage value smaller than the drive voltage applied during normal monitoring operation is applied as the operation test voltage, the second circuit 204b can determine that the motor 201 is behaving normally by detecting that a small current corresponding to the operation test voltage flows through the motor 201.

[0032] As a second method, when a voltage having a predetermined pulse width is applied as an operational test voltage, the second circuit 204b can determine that the motor is behaving normally by detecting that a minute current corresponding to the operational test voltage flows through the motor.

[0033] As a third method, the second circuit 204b is provided with a current-reducing resistor for reducing the voltage value when a voltage value equivalent to the drive voltage is applied as an operational test voltage, and it can be determined that the motor 201 is behaving normally by detecting that a minute current corresponding to the reduced voltage value flows through the motor 201.

[0034] As a fourth method, when a voltage having a predetermined pulse width is applied as an operational test voltage, the second circuit 204b can determine that the ringing mechanism 202 has behaved normally by detecting whether it has been driven very slowly or slightly so as not to ring the bell 203.

[0035] Second circuit 204b can output a confirmation result when an operation test is performed using any of methods 1 to 4. By using a voltage that causes a minute current to flow as the operation test voltage or by using a driving method for ringing mechanism 202 that does not ring bell 203, second circuit 204b can confirm whether or not a current flows through motor 201 or whether or not ringing mechanism 202 operates while suppressing the volume generated by the sound device.

[0036] In the configuration of Fig. 1, when an operation test is performed on audio device 61 or audio device 62, fire control device 10 can apply an operation test voltage to the audio device being tested. Also, in the configuration of Fig. 1, when an operation test is performed on audio device 71 or audio device 72, audio device repeater 70 can apply an operation test voltage to the audio device being tested based on a command from fire control device 10.

[0037] That is, the performance test voltage can be applied to the audio device being tested from the fire control signal receiver 10 or the audio device repeater 70. Then, the fire control signal receiver 10 or the audio device repeater 70 can receive a confirmation result from the audio device being tested in response to the application of the performance test voltage.

[0038] The confirmation results can be stored as a data history in the fire control receiver 10. Furthermore, the fire control receiver 10 can store the data history and confirmation results on a server as needed, or can notify the customer by email or the like.

[0039] Furthermore, the supplier of the automatic fire alarm system can obtain the confirmation result by externally accessing the fire receiver 10. Alternatively, the supplier of the automatic fire alarm system can obtain the confirmation result by externally accessing the fire receiver 10 as needed, and executing the sound confirmation function at a desired timing.

[0040] In addition, the method of activating the alarm confirmation function can be the same as in statutory inspections, by operating the fire receiver 10 on-site, or by having the detector activate a test alarm to operate in conjunction with the alarm, or by manually activating the function remotely via a network or automatically activating the function periodically.

[0041] Next, a series of processes executed in the automatic fire alarm system according to the present disclosure will be described using a flowchart. Fig. 3 is a flowchart showing a series of processes related to the sound confirmation method executed in the automatic fire alarm system according to the first embodiment of the present disclosure. Fig. 3 describes a specific example in which confirmation of the sound of the audio device 200 is performed from the fire receiver 10.

[0042] First, in step S301, the fire control signal receiver 10 applies an operation test voltage to the acoustic device 200, which is the subject of the operation test. During normal fire monitoring, if the fire control signal receiver 10 determines that it is necessary to sound the acoustic device 200 in accordance with the detection result of a sensor or the like, it applies a drive voltage to the acoustic device 200 to sound the bell 203.

[0043] On the other hand, when the fire control signal receiver 10 performs an operation test on the audio device 200 at a desired timing, the fire control signal receiver 10 applies an operation test voltage to the audio device 200 in step S301.

[0044] Next, in step S302, the operation check circuit 204 in the audio device 200 performs the operation check function using the first circuit or the second circuit depending on the operation test voltage, and returns the check result to the fire control signal 10.

[0045] Next, in step S303, the fire receiver 10 receives the confirmation result from the audio device 200 in response to applying the operation test voltage and performing the operation confirmation function, and performs necessary processing such as storage processing and notification processing.

[0046] As described above, according to the first embodiment, the volume generated by the audio device can be suppressed and the audio device operation check function can be executed at a desired timing. By utilizing such a function, an audio-related disconnection or operation abnormality can be detected before a statutory inspection, and repairs can be made before or during the statutory inspection.

[0047] Furthermore, even during statutory inspections where tests involving actual ringing of the bell are required, the operation confirmation function of the acoustic device according to embodiment 1 of the present disclosure can be effectively utilized to discover any disconnections or operational abnormalities related to the acoustics. [Explanation of symbols]

[0048] 10 Fire receiver, 61, 62, 71, 72, 200 Sound device, 70 Repeater for sound device, 201 Motor, 202 Sounding mechanism, 203 Bell, 204 Operation confirmation circuit, 204a First circuit, 204b Second circuit.

Claims

1. An acoustic device having a motor, a bell, and a ringing mechanism, wherein an external drive voltage is applied to the motor to drive the ringing mechanism and ring the bell, an operation confirmation circuit for detecting whether the motor or the sounding mechanism behaves normally in response to an operation test voltage when the operation test voltage is applied from the outside via the same wiring path as the driving voltage during fire monitoring during an operation test of the sound device; and When the operation test voltage is applied, the operation check circuit: a current value flowing through the motor according to the operational test voltage, or driving the sounding mechanism in response to the operational test voltage; If the above is detected, a detection process is executed to output a confirmation result indicating the normal behavior. sound equipment.

2. When a voltage value smaller than the drive voltage is applied as the operation test voltage, the operation confirmation circuit determines that the normal behavior has been demonstrated by detecting that a minute current corresponding to the operation test voltage flows through the motor, or by detecting that the ringing mechanism is driven so slowly or slightly that it does not ring.

2. The acoustic device of claim 1.

3. The operation check circuit determines that the motor has behaved normally by detecting that a minute current corresponding to the operation test voltage flows through the motor when a voltage having a predetermined pulse width is applied as the operation test voltage.

2. The acoustic device of claim 1.

4. The operation check circuit is provided with a current-reducing resistor for reducing the voltage value when a voltage value equivalent to the drive voltage is applied as the operation test voltage, and determines that the normal behavior has been demonstrated by detecting that a minute current corresponding to the reduced voltage value flows through the motor.

2. The acoustic device of claim 1.

5. A plurality of the acoustic devices according to any one of claims 1 to 4 is provided, a fire receiver for applying the driving voltage to each of the plurality of sound devices during fire monitoring to ring the bell of the sound device, and applying the operation test voltage during an operation test to each of the plurality of sound devices to execute the detection process by the operation check circuit; An automatic fire alarm system is also provided.

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