JP6202990B2 - Motor siren system - Google Patents

Description

  The present invention relates to a motor siren system.

  As a motor siren system for remotely operating a motor siren, the one described in Patent Document 1 is conventionally known. In this conventional example, the master station transmits a calling signal (control signal) to the slave station, activates the motor siren on the slave station side, and makes a siren sound.

  For example, when siren sounds are used for dam discharge warning, a plurality of the above slave stations are installed so as to cover a certain section of a river where the amount of water flowing temporarily increases with the discharge from the dam. It is necessary to install a master station that centrally controls these slave stations in a dam management facility.

  However, if the location of the master station and the slave station is separated as described above, it becomes difficult for the master station side to directly hear the siren sound emitted from the slave station side. For this reason, in order to check whether the motor siren is operating normally according to the control of the master station, it is necessary to have a separate worker on the slave station side to check the siren sound, Therefore, it is necessary to make it possible to remotely check the operation state of the slave station on the master station side.

  In this regard, for example, Patent Document 2 proposes that a sound collecting microphone is installed in the vicinity of a speaker that emits a siren sound, and the siren sound is checked on the master station side based on the detection result by the sound collecting microphone. Yes.

JP 11-195185 A Japanese Patent Application Laid-Open No. 11-296664

  However, in the first place, if a siren sound is generated at the time of inspection as described above, there is a risk of being misunderstood as an alarm, and there is also a possibility of causing a noise problem.

  Such a fear can be prevented, for example, by checking only whether a control signal is output to the motor of the motor siren at the slave station when the master station controls the motor siren at the slave station. In this case, the motor siren drive system cannot be checked.

  The present invention has been made to solve the above drawbacks, and it is an object of the present invention to provide a motor siren system that can prevent a misunderstanding of an alarm and the like and can be inspected including a drive system. And

According to the present invention, the object is
A motor siren system for remotely inspecting a motor siren 3 that blows by rotating a sounding body 2 by a motor 1 using an operation terminal 4;
The motor siren 3 is assembled with a rotation sensor 6 that detects the rotation of the transmission drive member 5 that transmits the rotational driving force of the motor 1 to the sounding body 2.
The operation terminal 4 outputs a control signal for rotating the motor 1 at a low speed at the time of inspection, monitors the output from the rotation sensor 6, and determines the number of rotations detected by the rotation sensor 6 based on the control signal. This is achieved by providing a motor siren system that determines whether the operation state of the motor siren 3 is good or bad based on whether or not it is within a predetermined error range compared to the expected rotational speed .

  The motor siren 3 transmits the rotational driving force of the motor 1 to the sounding body 2 via the transmission drive member 5, rotates the sounding body 2 to send air toward the windbreak window, and intermittently transmits the windbreak window. Open and close. When the sounding body 2 is rotated at a high speed, air is intermittently ejected from the wind cut window at a high pressure, thereby causing the air to vibrate strongly and generating a loud sound.

  By incorporating the rotation sensor 6 for detecting the rotation of the transmission drive member 5 into the motor siren 3 described above and remotely monitoring the operation terminal 4, it becomes possible to remotely grasp the operating state of the drive system of the motor siren 3. . If the operation state of the motor siren 3 is determined to be good or bad according to the detection result of the rotation sensor 6, the result of remote inspection can be obtained at the operation terminal 4.

  In the inspection including the drive system of the motor siren 3, whether or not the rotation sensor 6 can detect the rotation of the transmission drive member 5 by outputting a control signal for rotating the motor 1 at a low speed from the operation terminal 4 to the motor siren 3. Can be performed. Thus, by rotating the motor 1 at a low speed at the time of inspection, it is possible to prevent the generation of a blowing sound or to suppress the volume thereof to a low level.

  Therefore, according to the present invention, it is possible to perform remote inspection including the drive system while preventing the possibility of misunderstanding such as alarms caused by sounding sounds.

  As described above, the pass / fail judgment at the time of inspection is not limited to the presence / absence of rotation of the transmission drive member 5, and whether or not a detection result corresponding to the control signal output from the operation terminal 4 is obtained from the rotation sensor 6. In other words, by targeting whether or not the number of rotations corresponding to low-speed rotation is detected, the accuracy can be further increased. That is, the motor siren 3 is generally installed at a well-ventilated high place in order to ensure a long sound distance, and therefore, by targeting the rotation speed of the transmission drive member 5, for example, a sounding body It is possible to prevent erroneous determination when 2 is rotated by the wind. In this case, it is desirable to determine whether the rotational speed is within a predetermined error range in consideration of an operation error due to wind or the like.

  Various sensors can be used for the rotation sensor 6 described above, but the motor siren 3 is often installed in a place where environmental conditions are severe due to its nature. It is desirable to adopt a structure that can be expected to operate stably over a long period under severe conditions. In this case, the opposite magnetic poles are alternately arranged around the rotation shaft as the transmission drive member 5 and the magnets 7 are attached, and the magnetic field of the opposite magnetic poles of the magnets 7 sequentially traverses as the rotation shaft 5 rotates. If the rotational speed is detected based on the frequency of the induced current generated in the sensor conductor 8 by fixing 8 to the rotating shaft support portion 9, the high weather resistance obtained by using the magnet 7 can be utilized to achieve a certain weather resistance Can be secured. Further, by adopting such a structure, the rotation sensor 6 can detect rotation without requiring power supply.

  On the other hand, as described above, the inverter 10 can be used to enable the motor siren 3 to be operated at a low speed rotation other than the high speed rotation at the time of sounding. Thus, when detecting the rotation speed based on the frequency, there is a risk of erroneous detection. In this case, if a low-frequency component is removed and suppressed from the induced current by the low-pass filter 11, such erroneous detection can be prevented. With respect to the induced current from which the low-frequency component has been removed, the frequency can be counted and compared with a predetermined reference rotational speed to determine whether it is acceptable. In this case, the circuit configuration can be simplified if the induced current is converted into a voltage by the FV converter 12 and compared with a predetermined reference voltage to make a pass / fail determination.

  Further, as described above, in the motor siren 3 that is often placed in a well-ventilated high place, that is, in a harsh environment, it is desirable that the rotation sensor 6 be prevented from being exposed to the outside. In this case, the sensor conductor 8 is detachably fixed to the rotary shaft support portion 9 and accommodated in the siren case 13, and the window portion 14 that exposes the periphery of the sensor conductor 8 to the outside is opened and closed by the door 15. If formed in the case 13, the sensor conductor 8 can be easily replaced.

  As is apparent from the above description, according to the present invention, it is possible to provide a motor siren system that can prevent a misunderstanding such as an alarm and the like and that can be inspected including the drive system. Therefore, it is possible to fully prepare for disasters.

It is a functional block diagram which shows a motor siren system. It is a figure which shows a motor siren, and is a half sectional view. It is a principal part enlarged view of a motor siren, (a) is a longitudinal cross-section which shows the rotation sensor vicinity, (b) is a figure for demonstrating the structure of a magnet. It is a figure for demonstrating the process in the sub_station | mobile_unit with respect to the output from a rotation sensor.

  1 to 4 show an embodiment of the present invention. In this embodiment, the motor siren system forms part of a dam discharge warning system. As shown in FIG. 1, the dam discharge alarm system has a master station (operation terminal 4) and a plurality of slave stations 21 that are remotely controlled by the master station and drive an alarm device.

  The master station 4 is installed in a dam management facility, and is specifically configured as an operation console, for example. The slave station 21 is installed in a river basin. Each of the slave stations 21 is installed in the vicinity of the alarm device 22 to be controlled. Specifically, the alarm device 22 is an appropriate combination of the motor siren 3, the speaker 23, and the rotating lamp 24. Consists of. In addition to the above three types of alarm devices 22, other devices such as an electric bulletin board that displays an alarm may be added. In this case, the other devices can be controlled with respect to the slave station 21. 4 may be configured to be able to control the slave station 21 with respect to the other.

  For example, if the alarm device 22 is for issuing an alarm in the vicinity of a river, the alarm device 22 can be constituted by a motor siren 3 and a speaker 23. It is installed at a high place where there are not many obstacles that hinder the propagation of sound to the village in the vicinity and a long sound distance can be secured. In this case, the slave station 21 can be installed on the revetment. If the alarm device 22 is for issuing an alarm on a road around the river, the alarm device 22 includes a motor siren 3, a speaker 23, and a rotating lamp 24, and is installed along with the slave station 21 at the end of the road.

  As shown in FIG. 2, the motor siren 3 includes a sounding body 2 that generates a blowing sound by rotation and a motor 1 that rotationally drives the sounding body 2, and these are covered with a siren case 13. The The motor siren 3 is installed on the installation base 26 by a support base 25 provided at the lower end of the siren case 13.

  The sounding body 2 is a cast product such as aluminum, and is formed by covering the top and bottom of the rotary blades 2a arranged radially in the horizontal direction with a ceiling plate 2b and a bottom plate 2c. Each of the rotary blades 2a is formed in a bowl shape by extending a shielding plate 2d along the rotation direction from the rotation tip. In addition, an air inlet 2e is opened at the center of the ceiling plate 2b, and the sounding body 2 sucks air from the air inlet 2e, that is, the rotation axis direction by rotation, and a gap between the shielding plate 2d and the rotary blade 2a. That is, a flow of radiant wind that exhausts in a direction orthogonal to the rotation axis is generated. In addition, a fitting hole 2f that fits into the rotating shaft 5 described later is formed in the center of the bottom plate 2c.

  The above sounding body 2 is accommodated in the casing 27. The casing 27 is formed by welding a metal plate such as an aluminum plate and has a cylindrical side wall plate 27a and an upper surface plate 27b covering the upper surface of the side wall plate 27a. A vent hole 27c communicating with the intake port 2e described above is opened at the center of the upper surface plate 27b. In addition, the same number of wind-cut windows 27d as the above-described shielding plate 2d are opened in the side wall plate 27a at a size and position that can be closed by the shielding plate 2d.

  The casing 27 described above includes a hollow portion 27e having a size substantially equal to the outer dimension of the sounding body 2, and supplies air from the air inlet 2e into the hollow portion 27e as the sounding body 2 rotates, and the wind cut window 27d. Intermittently exhaust air from The air exhausted at a high pressure intermittently from the wind cut window 27d vibrates strongly and generates a loud sound.

  Further, the above-described siren case 13 has an intermediate cover 28 that covers the outside of the casing 27 at an intermediate portion in the height direction. The inner cover 28 is formed in a substantially hollow cylindrical shape that is slightly larger than the outer shape of the casing 27, the cylindrical peripheral wall is formed by a metal mesh 28a, and the ceiling wall 28b and the bottom wall 28c are formed by a metal plate material. The bottom wall 28c is provided with a shaft insertion hole 28d communicating with the fitting hole described above, and a bearing 28e is held around the shaft insertion hole 28d. When the casing 27 described above is installed with the lower edge portion in close contact with the bottom wall 28c, an appropriate ventilation path is ensured between the ceiling wall 28b and the upper surface plate 27b. The siren case 13 is formed of a metal such as aluminum.

  On the other hand, the motor 1 is an AC motor 1 and is disposed below the sounding body 2. The siren case 13 has a cylindrical lower cover 29 that covers the outside of the motor 1, and the upper end edge of the lower cover 29 is joined to the bottom wall 28c of the middle cover 28 by welding or the like. Further, the lower end of the lower cover 29 is joined to the above-described support base 25 by welding or the like.

  The support base portion 25 is formed by bending a metal plate material or the like, and has a leg piece 25b extending outward from a lower end edge of the side wall portion 25a constituting the truncated conical surface. It is mounted on the installation base 26 described above. Further, the upper surface of the side wall portion 25 a is covered with a ceiling portion (rotating shaft support portion 9), and the above-described lower cover 29 is joined to the ceiling portion 9. A shaft insertion opening 25c is opened at the center of the ceiling portion 9 at the same plane position as the shaft insertion hole 28d described above, and a bearing 25d is held around the shaft insertion opening 25c. In FIG. 2, reference numeral 25e denotes a bolt hole into which an anchor bolt (not shown) for fixing the support base 25 to the installation base 26 is inserted.

  The sounding body 2 and the motor 1 are connected by a rotating shaft 5. The rotating shaft 5 passes through the shaft insertion hole 28d, the motor 1, and the shaft insertion port 25c described above, and the upper and lower end portions thereof are held by the above-described bearings and held in the siren case 13 in a vertical posture. The upper end portion is fitted into the fitting hole 2f described above and connected to the sounding body 2 in a relatively non-rotatable rotation.

  The siren case 13 includes an upper cover 30 above the above-described middle cover 28. The upper cover 30 houses therein a mute mechanism that is not shown in FIG. This silencer mechanism opens and closes the vent 27c of the casing 27 by driving the shielding lid up and down by an actuator controlled by the slave station 21 described above, and closes the vent 27c in the casing 27, that is, the sound generation. The air supply from the outside to the body 2 is cut off, and the sound of blowing is abruptly muted, and the reverberation is prevented to clarify the sounding pattern.

  The motor siren 3 described above transmits the rotational driving force of the motor 1 to the sounding body 2 through the rotating shaft 5 to horizontally rotate the sounding body 2, and this rotation draws air from the wire mesh 28a into the inside cover 28, or Then, air is drawn into the casing 27 from the air inlet 2 e through the upper air passage in the middle cover 28. Moreover, the air in the casing 27 is intermittently discharged from the wind cut window 27d by the shielding plate 2d at a high pressure, and the sound generated by the discharge is emitted to the side through the wire mesh 28a. The motor 1 is driven and stopped at a predetermined time interval, and the shielding cover of the silencer mechanism is driven up and down to blow and stop the blowing sound at predetermined time intervals, and a blowing pattern corresponding to the type of alarm is emitted. .

  Further, in order to detect the rotation of the rotating shaft 5 described above, the rotation sensor 6 is disposed inside the support base 25. As shown in FIG. 3, the rotation sensor 6 includes a detection member attached to the rotation shaft 5 and a detection member for detecting the detection member. The member to be detected is a permanent magnet (magnet 7) in this embodiment, and is configured as a multipolar magnet having magnets 7a and 7b that are alternately different in the circumferential direction of a magnet material formed in an annular shape. In this embodiment, as shown in FIG. 3B, six magnetic poles 7a, 7b,... Are formed in the circumferential direction.

  The above permanent magnet 7 is attached to the rotary shaft 5 via the support 31. As shown in FIG. 3, the support 31 includes a main body portion 31 a to which the permanent magnet 7 is fixed, and a fixing portion 31 b that is fixed to the rotating shaft 5. The support 31 is made of a metal such as aluminum.

  The main body 31a is formed in a ring shape with an opening 31c into which the rotary shaft 5 can be inserted in the center, and an annular recess 31d in which the permanent magnet 7 is accommodated and fixed in the inner peripheral portion of the upper surface thereof. Is recessed. The recess 3d has a depth approximately equal to the thickness of the permanent magnet 7, and an iron plate 31e for increasing the magnetic force of the permanent magnet 7 disposed on the upper surface is laid on the bottom surface thereof. It should be noted that the rust preventive treatment is applied to the permanent magnet 7 when being fixed to the main body 31a.

  The fixing portion 31b is formed in a donut shape by hanging downward around the opening of the main portion 31a, and screw holes 31f penetrating the inside and outside of the fixing portion 31b are opened at equal intervals in the circumferential direction. A set screw 32 for fixing the support 31 to the rotating shaft 5 by pressing the side surface of the rotating shaft 5 is screwed into the screw hole 31f. In FIG. 3A, the set screw 32 includes a head, but it is also possible to omit the head by providing a hexagonal hole or the like at the material end of the screw portion.

  On the other hand, the detection member is formed by winding a coil (sensor conductor 8) around the iron core 33 a plurality of times. This detection member is fixed to the ceiling portion 9 of the support base portion 25 with the bolt 35 via the angle member 34, and the iron core 33 is directed in the vertical direction, and is fixed at a position spaced apart from the upper surface of the permanent magnet 7. .

  In the above rotation sensor 6, when the permanent magnet 7 rotates with the rotating shaft 5 rotated by the motor 1, the S pole and N poles 7a and 7b of the permanent magnet 7 sequentially traverse the vicinity of the coil 8, and by electromagnetic induction. An induced current is generated in the coil 8. Since the direction of the induced current is reversed when the magnetic pole crossing the vicinity of the coil 8 is alternately switched between the S pole and the N pole, an alternating current having a frequency half the number of the magnetic poles of the permanent magnet 7 is generated in the coil 8. . In this embodiment in which the number of magnetic poles of the permanent magnet 7 is 6, assuming that the permanent magnet 7 (rotating shaft 5) makes one revolution per second, for example, an induced current having a frequency of 3 Hz is generated in the coil 8. It will be. The rotation sensor 6 detects the number of rotations of the rotating shaft 5 using such an induced current frequency.

  Further, in order to facilitate replacement of the rotation sensor 6 due to wear of the detection member, a window portion 14 that can be opened and closed by the door 15 is formed on the side wall portion 25a of the support base portion 25 described above. As shown in FIG. 2, the window portion 14 is formed in a position and size that can expose the periphery of the detection member including the bolt 35 described above to the outside. The door 15 can be rotatably connected to the support base portion 25 between an open rotation position for opening the window portion 14 and a closed rotation position for closing the window portion 14 by, for example, a hinge (not shown). .

  On the other hand, the speaker 23 is generally used for this type of alarm, and includes a diaphragm, a coil 8, and a magnet 7 (not shown). Similarly, the rotating lamp 24 is generally used for this type of alarm, and although it is not shown in the figure, for example, it includes a light source such as a light bulb, a reflecting mirror, and a motor.

  As shown in FIG. 1, the slave station 21 that controls the above alarm device 22 includes a siren drive control unit 36, a sensor monitoring unit 37, a speaker drive control unit 38, and a rotating lamp drive control unit 39 controlled by the control unit 46. , And a transmission / reception unit 40 that operates by receiving power from a commercial power source. The siren drive control unit 36 is connected to the motor 1 of the motor siren 3 and supplies power from the trademark power source to the motor 1 by switching a relay (not shown), or stops the supply and controls the rotation of the motor 1. . This siren drive control unit 36 is provided with an inverter circuit (inverter 10), and by rotating the frequency, the motor 1 is driven to rotate at a predetermined high speed for driving an alarm, and the inspection drive that does not generate almost any sound. Rotation drive at low speed rotation. Furthermore, the siren drive control unit 36 supplies power to the actuator of the muffler mechanism described above to drive and control it.

  The sensor monitoring unit 37 is connected to the coil 8 described above and monitors the induced current generated in the coil 8. The sensor monitoring unit 37 removes the high-frequency component of the induced current by the low-pass filter 11, converts the frequency to a voltage by the FV converter 12, and compares the frequency with a predetermined reference voltage by the comparison unit 41. The reference voltage is set in consideration of a predetermined error in the voltage obtained by converting the frequency supplied from the siren drive control unit 36 to the motor 1 by the FV converter 12 during the inspection drive described above.

  More specifically, as shown in FIG. 4, the output from the low-pass filter (LPF) 11 is amplified and waveform-shaped by a signal amplification unit and waveform shaping unit 42 and supplied to the FV converter 12. The output from is supplied to the comparison unit 41 via the buffer amplifier 43. In FIG. 4, reference numeral 44 denotes a power supply adjustment unit including an A / D converter and the like, and the commercial power supply is converted into electric power that can be supplied to the low-pass filter 11 and the like by the power supply adjustment unit 44. The reference voltage described above is created by the reference voltage creation unit 45.

  The speaker drive control unit 38 is connected to the speaker 23 and supplies a predetermined alternating current to the coil of the speaker 23 according to the control of the control unit 46 or stops the supply and controls the sound generation of the speaker 23. Further, the revolving light drive control unit 39 is connected to the revolving light 24 and, like the siren drive control unit 36, supplies the electric power from the trademark power source to the light bulb or the motor of the revolving light 24, or stops the supply. Control the light emission of the light bulb and the like, and control the rotation of the motor.

  When a later-described alarm drive signal is received by the transmission / reception unit 47, the control unit 46 controls the siren drive control unit 36 to supply alarm drive power from the siren drive control unit 36 to the motor 1 of the motor siren 3. Supply. When the inspection drive signal is received by the transmission / reception unit 47, power for inspection drive is supplied from the siren drive control unit 36 to the motor 1, and an output from the sensor monitoring unit 37 is awaited. When a signal corresponding to the comparison result is received from the comparison unit 41 of the sensor monitoring unit 37, the signal is transmitted to the master station 4 via the transmission / reception unit 47 (output unit 47 in FIG. 4).

  The control unit 46 controls the speaker drive control unit 38 to supply the audio signal to the coil of the speaker 23 when a speaker drive signal and an audio signal described later are received by the transmission / reception unit. Further, when a rotating lamp driving signal, which will be described later, is received by the transmission / reception unit, the rotating lamp driving control unit 39 is controlled to supply electric power from the rotating lamp driving control unit 39 to the bulb of the rotating lamp 24 or the motor 1.

  As shown in FIG. 1, the master station 4 that controls the slave station 21 has an input unit 49, a display unit 50, and a transmission / reception unit 51 controlled by a control unit 48, and receives power from a commercial power source. Works. The input unit 49 includes a siren operation unit 52 to which an operation on the motor siren 3 described above is input, a speaker operation unit 53 to which a sound generated from the speaker 23 is input, and a rotation to which an operation on the rotary lamp 24 is input. And a lamp operation unit 54.

  The siren operation unit 52 is formed so as to be able to select and input an alarm drive operation and an inspection drive operation for the motor siren 3, and is configured by a set of operation buttons, for example. The speaker operation unit 53 includes, for example, an operation button for outputting sound from the speaker 23 and a microphone capable of inputting sound. Further, the rotating lamp operation unit 54 is configured by, for example, operation buttons.

  The said display part 50 displays the inspection result of the motor siren 3, for example, is comprised by a set of indicator lamps which show the quality of the inspection result.

  When the control unit 48 detects the pressing of the operation button or the like of the siren operation unit 52, the control unit 48 transmits the alarm drive signal or the inspection drive signal described above according to the type of the pressed operation button or the like via the transmission / reception unit 51. 21 to send. Further, when pressing of an operation button or the like of the speaker operation unit 53 is detected, a speaker drive signal is transmitted to the slave station 21 via the transmission / reception unit 51 together with an audio signal input from the microphone thereafter. Further, when the pressing of the operation button or the like of the rotating lamp operation unit 54 is detected, a rotating lamp driving signal is transmitted to the slave station 21 via the transmission / reception unit 51.

  In addition, when receiving a signal corresponding to the comparison result by the comparison unit 41 of the sensor monitoring unit 37 from the slave station 21, the control unit 48 causes the display unit 50 to display an inspection result corresponding to the type of the signal. Specifically, for example, when a signal indicating that the voltage input to the comparison unit 41 is lower than the reference voltage is received, an indicator lamp indicating that the voltage is abnormal is turned on, and conversely, it is higher than the reference voltage. When a signal indicating the above is received, an indicator lamp indicating normality is turned on.

  Therefore, in this embodiment, the motor siren system can remotely drive the motor siren 3 by the alarm driving operation of the siren operation unit 52 in the master station 4, and the inspection driving operation is performed. In some cases, the motor siren 3 is driven at a predetermined low speed to such an extent that it hardly generates a blowing sound for a predetermined short time. At the time of low speed driving, the number of revolutions detected by the rotation sensor 6 is compared with a predetermined reference value corresponding to the low speed driving at the slave station 21, and the comparison result is transmitted to the master station 4. Displayed as pass / fail.

  Further, by operating the speaker operation unit 53 and the rotating lamp operation unit 54 in the master station 4, it is possible to report an alarm from the speaker 23 or to drive the rotating lamp 24 by remote operation.

  In the above, the case where either one of two types of signals corresponding to the result of the comparison unit 41 is transmitted from the slave station 21 to the master station 4 has been shown. However, by transmitting or not transmitting one type of signal. It is sufficient to show the result of the comparison unit 41. Similarly, the display unit 50 does not display any of the inspection results, and it is sufficient to display only the inspection results. Further, a relay station can be provided between the master station 4 and the slave station 21. In this case, signals can be transmitted and received even if the distance between the master station 4 and the slave station 21 is more remote. become. Further, in the remote inspection of the motor siren 3, in addition to the rotation sensor 6 described above, an appropriate monitoring unit for monitoring the output of the siren drive control unit 36 to the motor 1 is provided in the slave station 21, and monitoring of this monitoring unit is performed. When both the result and the detection result of the rotation sensor 6 described above are appropriate, the master station 4 can display a good result of the inspection.

  In addition, when the stepped portion that can be engaged with the support 31 and the set screw 32 is provided on the side surface of the rotating shaft 5 described above, the permanent magnet 7 can be easily positioned in the longitudinal direction of the rotating shaft 5. . In addition, when a motor siren system having a sound collecting microphone as shown in the above-described conventional example is an existing one, the sound collecting microphone cable is used for the rotation sensor 6 as it is. It can be constructed easily. Furthermore, in the above, the case where the motor siren system is used for the discharge warning of the dam has been shown, but it is also possible to use it for other purposes such as the disaster prevention system of the local government. It is sufficient to install slave stations at various locations in the city.

DESCRIPTION OF SYMBOLS 1 Motor 2 Sounding body 3 Motor siren 4 Operation terminal 5 Transmission drive member 6 Rotation sensor 7 Magnet 8 Sensor conductor 9 Rotation shaft support part 10 Inverter 11 Low pass filter 12 FV converter 13 Silencer case 14 Window part 15 Door

Claims (4)

A motor siren system for remotely inspecting a motor siren that blows by rotating a sounding body by a motor using an operation terminal,
The motor siren is assembled with a rotation sensor that detects the rotation of the transmission drive member that transmits the rotational driving force of the motor to the sounding body,
In addition, at the time of inspection, the operation terminal outputs a control signal for rotating the motor at a low speed, monitors the output from the rotation sensor, and determines the rotation speed detected by the rotation sensor as an expected rotation speed based on the control signal. A motor siren system that determines whether the operation state of the motor siren is good or not by comparing it with a predetermined error range . A magnet is attached to the motor siren by alternately arranging opposite magnetic poles around a rotating shaft connecting the sound generating portion and the motor, and the sensor conductor is arranged such that the magnetic field of the opposite magnetic pole sequentially traverses as the rotating shaft rotates. Is fixed to the rotating shaft support,
The motor siren system according to claim 1 , wherein the rotation sensor detects a rotation speed based on a frequency of an induced current generated in the sensor conductor. The motor siren is variable in rotation speed by an inverter,
The motor siren system according to claim 2 , wherein the operation terminal converts a low frequency component extracted from the induced current into a voltage with an FV converter using a low-pass filter and compares the voltage with a predetermined reference voltage to determine whether the operation is good. The sensor conductor is detachably fixed to the rotating shaft support and is housed in a siren case.
The motor siren system according to claim 2, wherein a window portion that exposes the sensor conductor periphery to the outside is formed in the siren case so as to be opened and closed by a door.

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