JP7404094B2 - Alarm sound measuring device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an alarm sound measuring device that measures alarm sounds emitted by speakers installed to call attention to railway crossings, for example.

2. Description of the Related Art Conventionally, functional inspections of speakers installed to alert people at railroad crossings and the like are often carried out through periodic inspection work by maintenance personnel (see, for example, Patent Document 1). In the inspection work described in Patent Document 1, maintenance personnel use a measuring device to measure the alarm sound emitted by the speaker, thereby inspecting the function of the speaker.

Japanese Patent Application Publication No. 2016-175444

Here, in the periodic function inspection, the function of the speaker cannot be confirmed unless the inspection time has come, and there is room for improvement in terms of quick response to a decline in the function of the speaker. Therefore, in order to ensure such quick response, there is a need for a technology that allows maintenance personnel to measure alarm sounds at any time without actually visiting the site where the speakers are installed.

Therefore, the present invention focuses on the room for improvement as described above, and provides an alarm sound measuring device that allows maintenance personnel to measure alarm sounds at any time without actually visiting the speaker installation site. With the goal.

In order to solve the above problems, an alarm sound measuring device is an alarm sound measuring device that measures an alarm sound emitted by a speaker installed for alerting, and includes a sound collecting section installed near the speaker. , whether the sound collected by the sound collection unit is the alarm sound, whether the sound pressure of the sound exceeds a predetermined threshold, and the repetition cycle of the sound within a predetermined cycle range. a determination unit that makes a determination based on both whether or not the sound is a sound that repeatedly changes in strength or not, and a determination unit that makes a determination when the sound collected by the sound collection unit is determined to be the alarm sound. a data generation section that measures the sound pressure and repetition period of the sound that is later collected by the sound collection section and generates measurement data based on the measurement results; and an output section that outputs the measurement data to a predetermined output destination. It is characterized by comprising the following.

According to the above alarm sound measuring device, when an alarm sound is collected by the sound collection unit, measurement data is generated and output based on the measurement results regarding the sound pressure and repetition period of the alarm sound. As a result, the sound pressure and repetition period of the alarm sound, which strongly reflects the influence of the functional decline of the speaker, can be obtained at any time at the output destination of the measurement data. In other words, according to the alarm sound measuring device of the present invention, the alarm sound can be measured at any time without requiring maintenance personnel to actually visit the site where the speaker is installed.

Here, the alarm sound is sounded at a first sound pressure for a first period from the start of the sounding, and a second sound lower than the first sound pressure is sounded for a second period after the first period has elapsed. It is preferable that the data generation section generates the measurement data for the sound collected by the sound collection section in each of the first period and the second period.

Some speakers used to raise awareness emit a loud warning sound for a certain period of time from when the gate starts ringing, which corresponds to when the gate begins to come down, and then switch to a low-pitched warning sound when the gate is completely lowered. be. The influence of the speaker's functional decline may be reflected in both the alarm sound with a high sound pressure at the beginning of ringing and the alarm sound with a low sound pressure thereafter. According to the above configuration, measurement data for the two types of alarm sounds having different sound pressures can be obtained separately, that is, measurement data for the first period at the beginning of the sound and the second period thereafter, which is preferable. It is.

Further, the data generation unit may be configured to generate a first waiting time after a first waiting time corresponding to a determination time in the determination unit has elapsed after the sound pressure of the sound collected by the sound collection unit exceeds a ringing start level. Measurement is performed over one measurement period, and after the first measurement period has elapsed, the measurement is performed over a second measurement period after a second waiting time spanning the transition from the first period to the second period has elapsed. It is also suitable to perform the measurement.

According to this configuration, the measurement timing of the two types of alarm sounds with different sound pressures described above is determined based only on the elapsed time after the sound pressure of the collected sound exceeds the ringing start level, and the measurement is performed. It will be done. This makes it possible to perform measurements with less processing load on the data generation unit, compared to, for example, determining measurement timings for two types of alarm sounds based on changes in the sound pressure of the alarm sounds. .

Further, it is preferable that the output section outputs the measurement data wirelessly.

According to this configuration, measurement data can be output to a desired output destination even at railroad crossings and the like where it is undesirable to have long cables.

Further, the determination section, the data generation section, and the output section are installed in a measurement unit that generates and outputs the measurement data based on the sound collected by the sound collection section, and the sound collection section Preferably, the measuring unit is connected to the measuring unit via a relay cable, and the sound collecting section, the determining section, the data generating section, and the output section are driven by a battery mounted on the measuring unit. be.

In general, in railroad crossing alarms, disaster prevention radios, and the like, the speaker for alerting is often located at a high place or the like that cannot be easily accessed by maintenance personnel. In response to such circumstances, according to the above configuration, the measurement unit can be placed in a location that is easily accessible to maintenance personnel, separate from the sound collection section installed near the speaker. This measurement unit houses elements that tend to require frequent maintenance, such as a judgment section and a data generation section, as well as a battery that needs to be replaced when exhausted. Thereby, maintenance of the judgment section, data generation section, etc., battery replacement, etc. can be performed with good workability. In addition, since the sound collection section and the measurement unit are connected by wire using a relay cable instead of wirelessly, even if the sound collection section is removed from its installation location near the speaker for some reason, the sound collection section dissipation can be suppressed.

Further, the alarm sound is a sound that sounds such that the amplitude of the sound in a predetermined frequency band increases or decreases, and a component corresponding to the sound in the predetermined frequency band is extracted from the sound collection result by the sound collection unit. It is also preferable to further include a signal processing unit that performs signal processing including at least one of filtering processing and amplification processing.

According to this configuration, processing accuracy in the subsequent processing section can be improved by appropriately performing removal of noise sound components other than the alarm sound, amplification processing, etc. for the sound collection result in the sound collection section. . Regarding the amplification process, since the sound pressure measurement results will vary depending on the distance between the speaker and the sound collector, the amplification factor can be adjusted appropriately when the sound collector is installed near the speaker. It is also possible to stabilize the sound pressure measurement results by reducing the variations in the sound pressure.

It is also preferable to further include a sleep control unit that stops the operations of the sound collection unit, the determination unit, the data generation unit, and the output unit during the sleep period when a predetermined sleep period arrives. .

According to this configuration, it is possible to suppress the power consumption of the sound collection section, the judgment section, the data generation section, and the output section during the sleep period, so that a power saving effect can be obtained.

In addition, the data generation section measures the peak value of sound pressure that repeatedly appears in response to the ringing of the sound collected by the sound collection section over a predetermined measurement time, and also measures the peak value of the sound pressure at the measurement time. It is also preferable to measure the appearance interval as the repetition period, and generate data representing the average value of the peak values and the number of appearances of the peak per unit time calculated from the repetition period as the measurement data. It is.

When the speaker function deteriorates, the effect is often reflected in the peak value of the sound pressure in the alarm sound and the number of times the peak appears per unit time. According to the above configuration, since measurement data representing these data is output, it is possible to satisfactorily determine whether there is a functional decline in the speaker at the output destination.

Further, it is preferable that the output section outputs the measurement data after the sound pressure of the sound collected by the sound collection section falls below a ringing end level.

According to this configuration, the output operation at the output section is suppressed, and as a result, the power consumption related to data output is suppressed, so that a power saving effect can be obtained.

According to the above-mentioned alarm sound measuring device, maintenance personnel can measure the alarm sound at any time without actually visiting the site where the speaker is installed.

FIG. 1 is a schematic diagram showing a railroad crossing where an alarm sound measuring device according to an embodiment is installed. FIG. 2 is a block diagram showing the railroad crossing equipment box shown in FIG. 1, focusing on the flow of measurement data. FIG. 3 is an external view of the alarm sound measuring device schematically shown in FIGS. 1 and 2. FIG. FIG. 4 is a diagram showing the measurement unit shown in FIG. 3 in a state where the lid of the resin case is opened and the inside is visible. 5 is a block diagram schematically showing the hardware configuration of the alarm sound measuring device, focusing on the internal configuration of the measurement unit shown in FIG. 4. FIG. 6 is a schematic block diagram showing the hardware configuration of the main body board shown in FIG. 5. FIG. FIG. 5 is a schematic diagram showing, in a table format, an example of on/off combinations of a plurality of switches in the setting switch shown in FIG. 4; 7 is a schematic functional block diagram focusing on the functions of the alarm sound measuring device schematically shown in FIGS. 3 to 7. FIG. FIG. 9 is a diagram schematically showing the waveform of an alarm sound to explain the judgment process performed by the judgment unit shown in FIG. 8; It is a figure which shows the time chart showing the measurement process of an alarm sound. It is a flowchart showing the flow of processing up to generation of measurement data in alarm sound measurement processing. 3 is a flowchart illustrating a process flow from generation of measurement data to completion of output of measurement data in alarm sound measurement processing.

Hereinafter, an alarm sound measuring device according to an embodiment will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing a railroad crossing where an alarm sound measuring device according to an embodiment is installed.

The level crossing 1 shown in FIG. 1 is a facility installed at the intersection of the railway track R11 and the road R12, and includes two gates 11, two alarms 12, and a level crossing equipment box. It is equipped with 13. The barrier 11 and the alarm 12 are arranged in pairs across the road R12, and further in pairs across the track R11.

The barrier 11 includes a barrier 11a and a drive unit 11b that lifts and lowers the barrier 11a to open and close the barrier 11, and lowers the barrier 11a when a train passes, allowing people and vehicles to reach the track R11. control the intrusion of

The alarm device 12 includes a columnar object 12a, a sign board 12b, a speaker 12c, and a warning light 12d. The columnar object 12a is erected beside the track R11 and the road R12, and supports a sign board 12b, a speaker 12c, and a warning light 12d. The signboard 12b indicates that this equipment is the warning device 12 for the level crossing 1. The speaker 12c is arranged on the upper end side of the columnar object 12a, and is used to emit a warning sound before and after the train passes. In this embodiment, the alarm sound is, for example, a sound that sounds such that the amplitude of the sound increases or decreases according to a sound signal that is a combination of oscillation signals of 700 Hz and 750 Hz. The warning light 12d is arranged below the sign plate 12b on the columnar object 12a, and is hung from before the train passes until after the train passes, and repeatedly flashes in response to the above-mentioned warning sound to provide a visual warning.

The level crossing equipment box 13 is installed next to the first crossing gate 11, controls the operation of each crossing gate 11 and each alarm 12, collects various information related to the monitoring of the crossing 1, and transmits it via the network unit 2. This is a facility that houses various devices that communicate with a predetermined command server 3.

Here, in this embodiment, an alarm sound measuring device 100 that measures the alarm sound emitted by the speaker 12c is attached to the columnar object 12a of each alarm device 12. This alarm sound measuring device 100 wirelessly outputs measurement data to a main unit 13a, which will be described later, which is housed in a railroad crossing equipment box 13. Then, the main unit 13a of the railroad crossing equipment box 13 wirelessly outputs the output measurement data to the network unit 2, and the measurement data is sent from the network unit 2 to a predetermined command server 3.

FIG. 2 is a block diagram showing various devices in the railroad crossing instrument box shown in FIG. 1, focusing on the flow of measurement data output from the alarm sound measuring device.

The level crossing equipment box 13 is equipped with an overall control device 13-1, a main unit 13a, a power supply device 13b, a contact input/output device 13c, and a long distance wireless module 13d. Furthermore, a short-range wireless module 13e is externally installed in the railroad crossing equipment box 13.

The overall control device 13-1 is in charge of controlling the entire level crossing, including devices provided at the level crossing 1 such as the barrier 11 and alarm 12, and various devices in the level crossing equipment box.

The main unit 13a receives measurement data from the alarm sound measuring device 100, performs various processing, and wirelessly outputs the measurement data and processing results to the network unit 2 via the long-distance wireless module 13d. The power supply device 13b receives power from a commercial power supply or the like from an external source, converts it into 24V DC power, and supplies the DC power to each device. The contact input/output device 13c exchanges a level crossing operation signal indicating the operating state of each circuit breaker 11 and each warning device 12 with the main unit 13a under the control of the overall control device 13-1. The long-distance wireless module 13d performs wireless communication with the command server 3 via the network unit 2. The wireless communication here is performed in accordance with wireless communication standards such as LoRa (Long Range: registered trademark), which is a type of LPWA (Low Power Wide Area: registered trademark), and LTE (Long Term Evolution: registered trademark). be exposed. The short-range wireless module 13e performs wireless communication with the alarm sound measuring device 100. The wireless communication here is performed in accordance with a wireless communication standard such as Zigbee (registered trademark).

Further, a maintenance PC (Personal Computer) 4 can be connected to the main unit 13a by wire. During maintenance, various parameters are set/changed for the main unit 13a, various data are downloaded from the main unit 13a, etc. via the PC 4. Communication in the wired connection between the main unit 13a and the PC 4 is performed in accordance with a communication standard such as RS232C (Recommended Standard 232C).

The railroad crossing 1 in this embodiment is roughly configured as described above. In addition, the number of installed barriers and alarms at a level crossing, their installation positions, equipment configuration, internal configuration of the level crossing equipment box, connection form and communication standards between the level crossing equipment box and external devices, etc. are all as shown in Figures 1 and 2. The present invention is not limited to the above-mentioned schematic configuration described with reference to it, and can be set as appropriate.

Next, the alarm sound measuring device 100 schematically shown in FIGS. 1 and 2 will be described in detail.

FIG. 3 is an external view of the alarm sound measuring device schematically shown in FIGS. 1 and 2.

The alarm sound measurement device 100 includes a microphone 100a, a measurement unit 100b, and a relay cable 100c. The microphone 100a has a sound pressure sensor 101 (FIG. 5) and a sensor board 102 (FIG. 5) housed inside a resin case 100a-1, and is installed near the speaker 12c of the alarm 12. The measurement unit 100b is a resin case 100b-1 with an opening/closing lid 100b-1a containing various circuit boards, etc., and is located below the speaker 12c on the pillar 12a of the alarm 12 so that maintenance personnel cannot Installed in an easily accessible location. Relay cable 100c is a cable that connects microphone 100a to measurement unit 100b.

FIG. 4 is a diagram showing the measurement unit shown in FIG. 3 with the lid of the resin case opened and the inside visible, and FIG. 5 shows the hardware configuration of the alarm sound measuring device as shown in FIG. FIG. 2 is a block diagram schematically showing the internal configuration of the measurement unit shown in FIG.

As described above, the sound pressure sensor 101 and the sensor board 102 are housed inside the resin case 100a-1 of the microphone 100a. The sound pressure sensor 101 collects sound near the speaker 12c. The sound collection results are sent to the measurement unit 100b via the relay cable 100c.

A metal shield case 103, a main body board 104, a battery 105, a communication board 106, and an antenna 107 are mounted inside the resin case 100b-1 of the measurement unit 100b.

The shield case 103 accommodates the main board 104 and protects the main board 104 so that radio signals transmitted and received by the antenna 107 do not become electromagnetic noise and affect the main board 104.

The main body board 104 is a part that performs various processes related to measurement of the alarm sound emitted by the speaker 12c. The main body board 104 is provided with a sound collection connector 104a, a battery connector 104b, a wireless connector 104c, a wired connector 104d, and a setting switch 104e. One end side of the above-mentioned relay cable 100c is connected to the sound collection connector 104a via the sound collection internal cable 102a. A battery 105 is connected to the battery connector 104b via an internal battery cable 105a. A communication board 106 that performs wireless communication is connected to the wireless connector 104c via a wireless internal cable 106c. A maintenance PC is connected to the wired connector 104d via a predetermined connection cable during maintenance. The setting switch 104e is used to input various settings by turning on/off a plurality of switches.

The battery 105 is replaceably mounted on the resin case 100b-1 and supplies power to the main body board 104. Power from the battery 105 is supplied from the main board 104 to the other communication boards 106 and the sound pressure sensor 101 and sensor board 102 of the microphone 100a.

The communication board 106 performs wireless communication processing in accordance with a wireless communication standard such as Zigbee (registered trademark), and is equipped with a main body connector 106a and an antenna connector 106b. The main body board 104 is connected to the main body connector 106a via a wireless internal cable 106c. An antenna 107 is connected to the antenna connector 106b via an internal antenna cable 107a.

The antenna 107 transmits and receives wireless signals under processing by the communication board 106.

FIG. 6 is a schematic block diagram showing the hardware configuration of the main body board shown in FIG.

The main body board 104 is equipped with an MPU (Micro Processing Unit) 104f, a detection circuit 104g, and a power supply circuit 104h. Furthermore, the main body board 104 is mounted with a wireless communication circuit 104i, a wired communication circuit 104j, an SW circuit 104k, a reset circuit 104m, and a ceramic resonator 104n.

The MPU 104f is an integrated circuit that performs various signal processing.

The detection circuit 104g performs processing such as filtering on the output from the microphone 100a under the control of the MPU 104f.

Under the control of the MPU 104f, the power supply circuit 104h appropriately converts the power from the battery 105 and supplies it to the MPU 104f.

Under the control of the MPU 104f, the wireless communication circuit 104i exchanges signals for wireless communication in accordance with a wireless communication standard such as Zigbee (registered trademark) with the communication board 106.

The wired communication circuit 104j, under the control of the MPU 104f, exchanges wired communication signals conforming to a communication standard such as RS232C with a maintenance PC connected to the main body board 104.

The SW circuit 104k performs various settings based on the on/off combination of a plurality of switches in the setting switch 104e shown in FIG. 4 under the control of the MPU 104f.

FIG. 7 is a schematic diagram showing, in a table format, an example of on/off combinations of a plurality of switches in the setting switch shown in FIG.

In the example of FIG. 7, a unit number for individually identifying the measurement unit 100b is set by the on/off combination of three switches "1" to "3" among the eight switches in the setting switch 104e. Ru. The switch "4" is used to forcefully output maintenance simulation data to the wireless communication circuit 104i instead of actual measurement data during maintenance. When it is on, it outputs simulated data, and when it is off, it stops outputting. The switch "5" is used to set permission/disapproval of communication with the maintenance PC via the wired communication circuit 104j during maintenance. When it is on, it is allowed, and when it is off, it is not allowed. Further, in the example of FIG. 7, three switches "6" to "8" are unused and empty switches.

The reset circuit 104m in FIG. 6 resets the MPU 104f.

The ceramic oscillator 104n supplies the MPU 104f with a reference clock that serves as a reference for circuit operation under the control of the MPU 104f.

The alarm sound measuring device 100 in this embodiment is roughly configured as described above. Note that the case material of the microphone and measurement unit in the alarm sound measuring device must be strong enough to withstand the scattering of ballast when a train passes, when it is installed near the railroad tracks as in the alarm sound measuring device 100 of this embodiment. For example, resin, metal, etc. may be used. Furthermore, the case shape is not limited to the shapes shown in FIGS. 3 and 4. The case material and case shape can be appropriately set depending on the usage environment and the like. Furthermore, the internal configuration of the measurement unit, the connection form of the board, antenna, and battery, the communication standard, the setting status of the setting switch, etc. are not limited to the above-mentioned schematic configuration explained with reference to FIGS. 3 to 7. It can be set as appropriate.

Next, the functions of the alarm sound measuring device 100 schematically shown in FIGS. 3 to 7 will be explained.

FIG. 8 is a schematic functional block diagram of the alarm sound measuring device schematically shown in FIGS. 3 to 7, focusing on its functions.

Focusing on its functions, the alarm sound measurement device 100 includes a sound collection section 111, a relay cable 100c, a signal processing section 112, a judgment section 113, a data generation section 114, an output section 116, and a sleep control section 117. . A sound collection section 111 is mounted on the microphone 100a. The signal processing unit 112, determination unit 113, data generation unit 114, output unit 116, and sleep control unit 117 form a measurement unit that generates and outputs measurement data based on the sound collected by the sound collection unit 111. It is installed in 100b. Further, the determination section 113, the data generation section 114, the output section 116, and the sleep control section 117 are constructed by the MPU 104f on the main body board 104 of the measurement unit 100b.

The sound collection unit 111 is a functional part installed near the speaker 12c, and is constructed by the sound pressure sensor 101 in the microphone 100a.

The signal processing unit 112 is a functional unit that performs signal processing, including both filtering processing and amplification processing, on the sound collected by the sound collecting unit 111. The filtering process is a process of extracting a component corresponding to a sound within a predetermined frequency band corresponding to an alarm sound corresponding to a sound signal obtained by combining oscillation signals of 700 Hz and 750 Hz. In addition, in the filtering process, excessive signals are also cut. The amplification process is a process of amplifying the sound collection result by the sound collection unit 111. This signal processing unit 112 further performs a smoothing process in which the sound collection result, which is a composite waveform of 700 Hz and 750 Hz, is smoothed by passing it through an integrating circuit. This signal processing section 112 is constructed by a detection circuit 104g on the main body board 104 of the measurement unit 100b. In the signal processing unit 112, the sound collection result that has been subjected to filtering processing, amplification processing, and smoothing processing is passed to the subsequent MPU 104f, where it is A/D converted and sent to judgment processing and data generation processing. .

The determining unit 113 is a functional unit that determines whether the sound corresponding to the sound collected by the sound collecting unit 111 and subjected to various signal processing by the signal processing unit 112 is indeed an alarm sound. Here, the determination unit 113 includes a measurement processing unit 113a and a determination processing unit 113b, which are functional parts common to the data generation unit 114. The measurement processing unit 113a is a functional unit that performs measurements, which will be described later, on the sound collection results of the sound collection unit 111. The determination processing unit 113b is a functional unit that determines whether or not the sound is an alarm sound based on the measurement result by the measurement processing unit 113a. This judgment is based on the fact that the sound pressure exceeds a predetermined threshold, and the sound repeats in intensity at a repeating cycle within a predetermined cycle range corresponding to the repeating cycle of the alarm sound. This is done based on whether or not the person is present.

FIG. 9 is a diagram schematically showing the waveform of an alarm sound to explain the judgment process performed by the judgment unit shown in FIG. 8.

As described above and as shown in FIG. 9, the alarm sound S11 is emitted such that the amplitude of the sound increases or decreases at a predetermined repetition period T11 according to a sound signal that is a combination of oscillation signals of 700 Hz and 750 Hz. It has become a sound. In FIG. 9, the horizontal axis represents time [S], and the vertical axis represents sound pressure [dB]. Further, detailed changes in the alarm sound S11 are depicted by a thin line L11, and increases and decreases in its amplitude are depicted by a thick line L12. The alarm sound S11 is a sound in which a peak P11 of a sound pressure exceeding a peak detection threshold TH11 appears at a repetition period T11 within a predetermined period range in a waveform of increasing and decreasing amplitude drawn by a thick line L11.

As described above, in the signal processing unit 112 preceding the determining unit 113, the smoothing process is performed on the sound collection result that has undergone the filtering process and the amplification process. The sound collection result after undergoing the filtering process and the amplification process has a waveform that changes in detail around the frequency of the composite waveform of 700 Hz and 750 Hz. By performing smoothing processing on the sound collection result of such a waveform, the sound collection result of the waveform with detailed changes drawn by the thin line L11 is converted into the sound collection result of the waveform of increase and decrease in amplitude drawn by the thick line L11. Ru.

In the determination unit 113, first, the measurement processing unit 113a performs A/D conversion and decibel conversion processing on the sound collection result that has passed through the signal processing unit 112, and converts the sound collection result into sound pressure information. This sound pressure information is digital information representing a waveform of increase/decrease in amplitude. Then, by comparing the amplified waveform represented by this sound pressure information with the peak detection threshold TH11 described above, the repetition period of the ringing is obtained. Furthermore, the measurement processing unit 113a calculates the number of times a peak appears per unit time based on this repetition period. After such a measurement process by the measurement processing unit 113a, the judgment processing unit 113b compares the number of times the peak appears with the number range that includes the number of times the peak P11 appears in the alarm sound S11. In addition to the pressure determination, it is determined whether the sound collected by the sound collection unit 111 is the alarm sound S11. The above judgment based on the comparison between the number of occurrences and the number range, and the sound pressure judgment that precedes this, determine whether the sound pressure of the sound collected by the sound collection unit 111 exceeds a predetermined threshold, and This corresponds to determining whether or not the sound is the alarm sound S11 based on both whether the sound is a sound that repeatedly changes in strength or weakness at a repetition cycle within a predetermined cycle range. The determination unit 113 having the measurement processing unit 113a and the determination processing unit 113b described above is constructed by the MPU 104f on the main body board 104 as described above.

When it is determined that the sound collected by the sound collection unit 111 is the alarm sound S11, the data generation unit 114 shown in FIG. It is a functional part that measures pressure and repetition period and generates measurement data based on the measurement results. Here, the data generation section 114 includes a measurement processing section 113a and a generation processing section 114a, which are functional parts common to the judgment section 113. The measurement processing unit 113a is a functional part that performs the above-mentioned measurement. The generation processing unit 114a is a functional unit that generates measurement data based on the measurement results in the measurement processing unit 113a. In the data generation unit 114, similarly to the processing in the determination unit 113, the measurement processing unit 113a performs A/D conversion on the sound collection results that have been subjected to various signal processing in the signal processing unit 112 and converts them into decibels. , obtain sound pressure information representing a waveform of increase/decrease in amplitude. Next, the measurement processing unit 113a measures the peak value of the sound pressure that repeatedly appears in response to the ringing of the alarm sound S11 over a predetermined measurement time, regarding the increase/decrease waveform represented by the sound pressure information obtained in this way. , the interval at which the sound pressure peaks appear during the measurement time is measured as a repetition period. Then, the generation processing unit 114a generates, as measurement data, data representing the average value of the peak values and the number of times a peak appears per unit time, which is calculated from the repetition period. The data generation section 114 having the measurement processing section 113a and the generation processing section 114a described above is also constructed by the MPU 104f on the main body board 104 as described above.

The output unit 116 is a functional part that outputs the measurement data generated by the data generation unit 114 to the main unit 13a of the railroad crossing equipment box 13, which is the output destination. In this embodiment, the measurement data generated by the data generation unit 114 is temporarily stored in a memory (not shown) on the main body board 104. Then, the output unit 116 reads the measurement data from the memory after a predetermined standby time has elapsed after the peak value of the sound pressure of the sound collected by the sound collection unit 111 has fallen below a predetermined ringing end level. and output it. After the data generation section 114 generates the measurement data, the output section 116 continues to monitor the increase/decrease waveform of the sound amplitude based on the sound collection result subjected to various signal processing by the signal processing section 112. Then, the output unit 116 recognizes that the generation of the alarm sound S11 by the speaker 12c of the alarm device 12 is about to end when the peak value in the increase/decrease waveform becomes lower than the sound end level. Thereafter, the apparatus waits for a waiting time until the generation of the alarm sound S11 is completely finished, and outputs the measured data after the waiting time has elapsed. The output at this time is performed by wireless communication in accordance with a wireless communication standard such as Zigbee (registered trademark). This output unit 116 is constructed by the MPU 104f in the sense that the MPU 104f in the main body board 104 performs output processing via the wireless communication circuit 104i and the communication board 106 and antenna 107 in the measurement unit 100b.

The sleep control unit 117 is a functional unit that stops the operations of the sound collection unit 111, the signal processing unit 112, the determination unit 113, the data generation unit 114, and the output unit 116 during the sleep period when a predetermined sleep period arrives. be. Examples of the sleep period include a certain period after the measurement data is output, a certain period from when the last train passes the railroad crossing until the first train passes the railroad crossing, and the like. Further, predetermined periodic periods such as a certain time period in one day, a certain time period on a certain day of the week, etc. are also examples of the sleep period.

Next, the measurement process of the alarm sound S11 executed by the alarm sound measurement device 100 described above will be explained with reference to the time chart and flowchart illustrated below.

FIG. 10 is a diagram showing a time chart representing the alarm sound measurement process. FIG. 11 is a flowchart showing the flow of the process from the generation of measurement data in the measurement process of the alarm sound, and FIG. 3 is a flowchart showing the flow of processing until completion.

The time chart TC10 in FIG. 10 shows a train chart TC11, a contact input chart TC12, an event chart TC13, a main unit chart TC14, and an alarm sound measurement chart TC15.

The train chart TC11 shows the progress of the train passing situation at the level crossing 1, such as absence of a train, approaching, passing, and after passing.

The contact input chart TC12 includes an operation instruction R indicating that the overall control device 13-1 of the level crossing equipment box 13 has activated the barrier 11 and the alarm 12, and an overall control device as a signal indicating the lowering state of the barrier 11. The course of the falling signal R output from 13-1 is shown. The operation instruction R and the lowering signal R are sent from the overall control device 13-1 to the main unit 13a via the contact input/output section 13c. When the operation instruction R changes from H to L when a train approaches, the alarm 12 starts sounding the alarm sound S11, and the barrier 11 starts lowering the barrier rod 11a after the lowering waiting time has elapsed. It is recognized by the main unit 13a. After the descent is completed, the descent signal R changes from L to H, and the descent state of the barrier 11 is recognized by the main unit 13a via the contact input/output section 13c of the level crossing equipment box 13. Once the train has passed, the operation instruction R changes from L to H, causing the alarm 12 to stop sounding the alarm sound S11, and the main unit to indicate that the barrier 11 has started raising the barrier rod 11a. 13a. When the descending signal R changes from H to L at the same time as this rising starts, the end of the descending state of the circuit breaker 11 is recognized by the main unit 13a.

The event chart TC13 shows the progress of the various operation events described above that occur in the circuit breaker 11 and the alarm 12 in response to changes in the operation instruction R. That is, the start of the alarm sound S11, the start of the lowering of the cutoff rod 11a, the completion of the cutoff when the lowering amount of the cutoff rod 11a exceeds a certain amount, and the end of the lowering of the cutoff rod 11a are shown. After that, the train waits for the train to pass, and after the train has passed, the warning sound S11 ends, the cutoff rod 11a starts to rise, and the rise ends. After the cutoff rod 11a has finished rising, as will be described later, the alarm sound measurement device 100 finishes measuring the alarm sound S11, and then outputs the measurement results from the alarm sound measurement device 100 to the main unit 13a.

The main unit chart TC14 shows communication events performed from the main unit 13a to the alarm sound measuring device 100 using a communication standard such as Zigbee (registered trademark). In this embodiment, the communication event performed from the main unit 13a to the alarm sound measuring device 100 is only a notification of receipt confirmation of the measurement data output from the alarm sound measuring device 100.

The alarm sound measurement chart TC15 shows a measurement chart TC151 and an output chart TC152.

The measurement chart TC151 depicts the sound pressure change in the alarm sound S11, but the sound pressure change described here is the change in the peak value in the amplitude increase/decrease waveform shown by the thick line L12 in FIG. It is. Hereinafter, this peak value will be simply referred to as sound pressure.

In this embodiment, the alarm sound S11 sounds at a first sound pressure (approximately 80 dB as an example) over a first period TS11 from the start of sounding, and at a second period TS12 after the first period TS11 has elapsed. The sound is generated at a second sound pressure (approximately 60 dB as an example) which is smaller than one sound pressure. The data generation unit 114 shown in FIG. 8 generates measurement data by performing the following measurements on the sounds collected by the sound collection unit 111 during each of the first period TS11 and the second period TS12.

That is, the data generation unit 114 determines whether the sound pressure of the sound collected by the sound collection unit 111 exceeds the ringing start level SL11 and after the first waiting time TS13 corresponding to the determination time by the determination unit 113 has elapsed. The measurement is performed over the first measurement time TS14. After this first measurement time TS14 has elapsed, measurement is performed over a second measurement time TS16 after a second waiting time TS15 spanning the switching from the first period TS11 to the second period TS12 has elapsed.

Processing related to the generation of such measurement data will be described with reference to the flowchart of FIG. 11, although it includes some content that is somewhat redundant with the explanation up to this point.

The process of this flowchart is started when the alarm sound measuring device 100 is activated after the sleep period defined by the sleep control section 117 described above ends. Then, first, each element is initialized (step S11), and then enters a standby state (step S12). During this time, the determining unit 113 determines whether the sound pressure of the sound collected by the sound collecting unit 111 has exceeded the ringing start level SL11 (step S13). If the ringing start level SL11 is lower than the ringing start level SL11 (NO determination in step S13), the process returns to step S12 and enters a standby state.

When the ringing start level SL11 is exceeded (YES determination in step S13), the determination unit 113 determines the sound pressure and The repetition period is measured (step S14). Thereafter, the determination unit 113 continues to determine whether the sound is the alarm sound S11 based on the measurement result (step S15). If it is not the alarm sound S11 (NO determination in step S15), the process returns to step S12 and enters a standby state. If it is the alarm sound S11 (YES determination in step S15), the data generation unit 114 determines whether a first waiting time ST13 corresponding to the determination time has elapsed (step S16).

If the first waiting time ST13 has not elapsed (NO determination in step S16), the determination in step S16 is repeated and the data generation unit 114 enters a state of waiting for the first waiting time ST13 to elapse. When the first waiting time ST13 has elapsed (YES determination in step S16), the peak value of the sound pressure and the repetition period of the peak are generated as data for the sound of the first sound pressure of approximately 80 dB collected by the sound collecting section 11. 114 (step S17). Then, the data generation unit 114 determines whether the first measurement time TS14 regarding the first sound pressure has elapsed (step S18). If the first measurement time TS14 has not elapsed (NO determination in step S18), the process returns to step S17 to continue measuring the first sound pressure sound. If the first measurement time TS14 has elapsed (YES determination in step S18), it is determined whether or not the second waiting time TS15 spanning the transition from the first sound pressure of approximately 80 dB to the second sound pressure of approximately 60 dB has elapsed. It is determined by the data generation unit 114 (step S19).

If the second waiting time ST15 has not elapsed (NO determination in step S19), the determination in step S19 is repeated and the data generation unit 114 enters a state of waiting for the second waiting time ST15 to elapse. When the second waiting time ST15 has elapsed (YES determination in step S19), the peak value of the sound pressure and the repetition period of the peak are generated as data for the second sound pressure sound of approximately 60 dB collected by the sound collecting section 11. 114 (step S20). Then, the data generation unit 114 determines whether the second measurement time TS16 regarding the second sound pressure has elapsed (step S21). If the second measurement time TS16 has not elapsed (NO determination in step S21), the process returns to step S20 and measurement of the second sound pressure sound is continued. When the second measurement time TS16 has elapsed (YES determination in step S21), based on the measurement result of the sound at the first sound pressure in step S17 and the measurement result of the sound at the second sound pressure in step S20, Measurement data is generated and stored in memory (step S22). As described above, as the measurement data, the average value of the sound pressure peak value and the number of times the peak appears per unit time are generated and stored for each of the sound at the first sound pressure and the sound at the second sound pressure. Ru.

Thereafter, the data generation unit 114 determines whether the sound pressure of the sound collected by the sound collection unit 111 has fallen below the ringing end level EL11 (FIG. 10) (step S23). If the ringing end level EL11 or higher (NO determination in step S23), the determination in step S23 is repeated, thereby entering a state of waiting for the sound pressure to decrease due to the end of the ringing. When the sounding end level EL11 is lower than the sounding end level EL11 (YES determination in step S23), the process returns to step S12 and enters a standby state in preparation for sounding the next alarm sound S11.

When the measurement data is generated and stored in this way, the output section 116 outputs the measurement data following the process shown in the output chart TC152 in the alarm sound measurement chart TC15 in FIG. It will be done. First, until the sound pressure of the sound collected by the sound collection section 111 falls below the ringing end level EL11, the output section 116 is in a standby state in which the communication board 106 is powered off. When the sound pressure falls below the ringing end level EL11, the power of the communication board 106 is turned on, and the output section 116 enters a startup standby state. This start-up standby state continues for a start-up standby time TS17 including the time for determining whether the sound pressure has become silent. Thereafter, the output unit 116 reads the measurement data from the memory and outputs it to the main unit 13a in the railroad crossing instrument box 13 by wireless communication in accordance with a wireless communication standard such as Zigbee (registered trademark). After the output, the system waits for a response from the main unit 13a in the railroad crossing equipment box 13.

During this time, the main unit 13a and the short-range wireless module 13e in the railroad crossing instrument box 13 are in a standby state for measurement data from the alarm sound measuring device 100. Then, upon receiving the measurement data from the alarm sound measuring device 100, the main unit 13a returns a response signal SR11 to the alarm sound measuring device 100 via the short-range wireless module 13e. When the output unit 116 receives the response signal SR11, the communication board 106 is powered off and returned to the standby state after a predetermined termination processing time TS18 has elapsed.

The processing executed by the output unit 116 regarding the output of such measurement data will be described with reference to the flowchart in FIG. 12, although it includes some content that overlaps with the description up to this point.

The process of this flowchart is started when the output unit 116 in the alarm sound measuring device 100 is activated after the sleep period defined by the sleep control unit 117 described above ends. Then, first, the output section 116 is initialized (step S31), and then enters a standby state (step S32). This standby state (step S32) ends when the sound pressure of the sound collected by the sound collection unit 111 in the measurement data generation process described above falls below the ringing end level EL11, and the process moves to the next step S33. .

In step S33, the communication board 106 is powered on, and then the communication board 106 is initialized (step S34) and enters a startup standby state. Thereafter, the output unit 116 determines whether the startup standby time TS17 has elapsed (step S35). If the startup standby time TS17 has not elapsed (NO determination in step S35), the determination in step S35 is repeated to enter a state of waiting for the startup wait time TS17 to elapse. When the startup standby time TS17 has elapsed (YES determination in step S35), the output unit 116 reads the measurement data from the memory and outputs it to the main unit 13a by wireless communication (step S36).

Thereafter, the output unit 116 determines whether the response signal SR11 has been returned from the main unit 13a within a predetermined time (step S37). If the response signal SR11 is not returned (NO determination in step S37), the communication board 106 is powered off (step S38), and the output section determines whether or not the number of outputs of measurement data has reached three times. 116 (step S39). If the number of times has reached three times (YES determination in step S39), the process returns to step S32, and the output unit 116 abandons the current data output and prepares for the sounding of the next alarm sound S11. If the number of times has not reached three (NO determination in step S39), it is determined whether a predetermined delay time has elapsed (step S40). If the delay time has not elapsed (NO determination in step S40), the determination in step S40 is repeated, resulting in a state of waiting for the delay time to elapse. If the delay time has elapsed (YES determination in step S40), the process returns to step S33, and the subsequent process is repeated to retry data output.

On the other hand, if the response signal SR11 is returned after the data is output (YES in step S37), the output process in the output unit 116 is completed (step S41), and the communication board 106 is powered off (step S37). S42). After that, the process returns to step S32, and the output unit 116 prepares for the sounding of the next alarm sound S11.

According to the alarm sound measurement device 100 of the embodiment described above, when the alarm sound S11 is collected by the sound collection unit 111, measurement data is generated based on the measurement results regarding the sound pressure and repetition period of the alarm sound S11. is generated and output. Thereby, the sound pressure and repetition period of the alarm sound S11, which strongly reflects the influence of the functional decline of the speaker 12c, can be obtained at any time at the output destination of the measurement data. That is, according to this embodiment, the maintenance personnel can measure the alarm sound S11 at any time without actually visiting the installation site of the alarm device 12.

Further, in the present embodiment, the alarm sound S11 is a sound that sounds at a first sound pressure over a first period TS11 from the start of sounding, and then sounds at a low second sound pressure over a second period TS12. ing. The data generation unit 114 generates measurement data regarding these two types of sounds. The influence when the function of the speaker 12c deteriorates may be reflected in each of the alarm sound S11 with a high sound pressure at the beginning of ringing and the alarm sound S11 with a low sound pressure thereafter. According to the above configuration, it is possible to separately obtain measurement data of the two types of alarm sounds S11 having different sound pressures, and it is possible to determine in detail whether the function of the speaker 12c has deteriorated or the like, which is preferable.

Furthermore, in the present embodiment, the data generation unit 114 performs measurement over a first measurement time TS14 after the first waiting time TS13 has elapsed from the start of sounding the alarm sound S11, and when the second waiting time TS15 has elapsed. The measurement is performed over the second measurement time TS16 after the measurement. According to this configuration, the measurement timing of the two types of alarm sounds S11 having different sound pressures described above is determined based only on the elapsed time after the sound pressure of the collected sound exceeds the ringing start level. will be held. As a result, compared to, for example, a case where the measurement timing of two types of alarm sounds S11 is determined based on the sound pressure change of the alarm sound S11 and measurements are performed, the processing load on the data generation unit 114 is reduced and measurements are performed. be able to.

Furthermore, in this embodiment, the output unit 116 outputs the measurement data wirelessly. According to this configuration, measurement data can be output to the main unit 13a in the level crossing equipment box 13 even at a level crossing 1 where it is not desirable to have long cables.

Further, the alarm sound measuring device 100 of the present embodiment has a structure in which a microphone 100a equipped with a sound collecting section 111 and a measurement unit 100b that generates and outputs measurement data are connected by a relay cable 100c. . The microphone 100a and the measurement unit 100b are driven by a battery 105 mounted on the measurement unit 100b. As shown in FIG. 1, the speaker 12c of the alarm device 12 is installed in a location such as a high place that cannot be easily accessed by maintenance personnel. According to the above configuration, the measurement unit 100b can be placed in a low place that is easily accessible to maintenance personnel, in addition to the microphone 100a installed near the speaker 12c. This measurement unit 100b accommodates elements that tend to require frequent maintenance, such as a determination section 113 and a data generation section 114, and a battery 105 that needs to be replaced when exhausted. Thereby, maintenance of the determination unit 113, data generation unit 114, etc., replacement of the battery 105, etc. can be performed with good workability. Further, the microphone 100a and the measurement unit 100b are not connected wirelessly, but are connected by wire through a relay cable 100c. Therefore, even if the microphone 100a is removed from the installation location near the speaker 12c due to some reason, dissipation of the microphone 100a can be suppressed. Note that the driving of the alarm sound measuring device 100 is not limited to battery driving as in this embodiment, but may be driven by an external power source that is supplied with power from the outside.

Further, in this embodiment, a signal processing section 112 is provided that performs filtering processing and amplification processing on the sound collection result by the sound collection section 111. According to this configuration, by appropriately performing removal and amplification processing of noise sound components other than the alarm sound S11 on the sound collection result by the sound collection unit 111, subsequent stages such as the determination unit 113 and the data generation unit 114 The processing accuracy in the processing section can be improved. Here, depending on the installation situation of the sound collecting section 111, the sound pressure measurement results may also vary depending on the distance between the speaker 12c and the sound collecting section 111. In this embodiment, regarding the amplification process in the signal processing unit 112, when the sound collection unit 111 is installed near the speaker 12c, the amplification factor is adjusted appropriately to reduce the above-mentioned variations in the sound pressure measurement result. It can also be stabilized.

Further, in this embodiment, a sleep control section 117 is provided that stops the operation of the microphone 100a and the measurement unit 100b during the predetermined sleep period when a predetermined sleep period arrives. According to this configuration, power consumption during the sleep period can be suppressed, so that a power saving effect can be obtained.

Further, in this embodiment, the data generation unit 114 generates data representing the average value of the peak values of sound pressure and the number of times the peak appears per unit time as measurement data. When the function of the speaker 12c of the alarm device 12 deteriorates, its influence is often reflected in the peak value of the sound pressure in the alarm sound S11 and the number of times the peak appears per unit time. According to the above configuration, since measurement data representing these items is output, it is possible to satisfactorily determine whether there is a functional decline in the speaker 12c in the main unit 13a in the railroad crossing equipment box 13 or in the command server 3 located beyond it. .

Furthermore, in this embodiment, the output unit 116 outputs the measurement data after the sound pressure of the sound collected by the sound collection unit 111 falls below the ringing end level EL11. According to this configuration, the output operation at the output unit 116 is suppressed, and as a result, the power consumption related to data output is suppressed, so that a power saving effect can be obtained.

Note that the embodiments described above merely show typical forms of the present invention, and the present invention is not limited thereto. That is, various modifications can be made without departing from the gist of the invention. Such modifications are, of course, included within the scope of the present invention as long as they still have the configuration of the alarm sound measuring device of the present invention.

For example, in the above-described embodiment, as an example of an alarm sound measurement device, measurement data is output to the main unit 13a in the railroad crossing equipment box 13, and the detection of abnormalities in the speaker 12c and their signs are left to the main unit 13a. A device 100 is illustrated. However, the alarm sound measuring device is not limited to this, and in addition to generating measurement data, it may also capture abnormalities and symptoms based on the measurement data, and output the capture results along with the measurement data. Furthermore, the capture of abnormalities and symptoms is not limited to being carried out by either the alarm sound measuring device or the output destination of the measurement data, but can be carried out by both the alarm sound measuring device and the output destination. You can also use it as

Here, examples of methods for capturing abnormalities and symptoms include the following methods. That is, a method may be used in which a determination range is determined in advance for each of a plurality of values, such as the average value of peak values of sound pressure represented by measurement data, the number of times a peak appears per unit time, etc., and the determination range is compared with each value. An example of the determination range is to provide a first range for capturing an abnormality and a second range for capturing signs of an abnormality that is set wider than the first range. In addition, an example of determination may include determining that the circuit breaker is abnormal or exhibits signs of abnormality if any one of the multiple values represented by the measurement data is outside the determination range. .

Further, in the above-described embodiment, as an example of the determination unit, whether or not the sound is an alarm sound is determined based on whether the sound pressure exceeds a predetermined threshold value, and repeats the intensity at a repetition period within a predetermined period range. A determining unit 113 that makes a determination based on both whether the sound is ringing or not is illustrated. However, the determination section is not limited to this. If the determination unit makes the determination based on at least one of the sound pressure determination and period determination, the determination unit determines whether or not it is an alarm sound based on only the sound pressure determination or only the period determination. It may be something.

Further, in the above-described embodiment, the main body unit 13a in the railroad crossing equipment box 13 installed next to the warning device 12 is illustrated as an example of the output destination of the measurement data. However, the output destination of the measurement data is not limited to this. For example, the output destination may be a command server connected via a predetermined network, and the measurement data may be output directly to this command server.

Further, in the above embodiment, as an example of the sound collecting section, the sound collecting section 111 is exemplified as a functional part constructed by the sound pressure sensor 101 mounted on the microphone 100a. However, the sound collecting section is not limited to this, and any sound collecting section may be used as long as it is installed near the speaker and exhibits a sound collecting function.

Further, in the above-described embodiment, the alarm sound S11 has two types of sounds, large and small, with different sound pressures, and the alarm sound measuring device 100 is exemplified which measures measurement data for each type of sound individually. . However, the alarm sound measuring device is not limited to this, and may be one that measures measurement data only for alarm sounds that sound at a certain type of sound pressure, for example. However, as described above, by measuring the measurement data for the two types of sounds separately, it is possible to determine in detail the functional deterioration of the speaker 12c.

Moreover, in the above-mentioned embodiment, the alarm sound measuring device 100 is illustrated in which the measurement timings of the above two types of alarm sounds S11 are determined based on the elapsed time from the start of sounding of the alarm sound S11. However, the alarm sound measuring device is not limited to this. For example, the measurement timing of the two types of alarm sounds S11 may be determined based on the change in the sound pressure of the alarm sound S11, and the measurement may be performed. However, as described above, by determining the measurement timing based on the elapsed time, the measurement can be performed while reducing the processing load related to data generation.

Moreover, in the above-mentioned embodiment, the alarm sound measurement device 100 in which the output unit 116 wirelessly outputs measurement data is illustrated. However, the alarm sound measuring device is not limited to this, and may output measurement data by wire, for example. However, as described above, by outputting wirelessly, it is possible to output even at the railroad crossing 1 where it is not desirable to have long cables.

Further, in the above-described embodiment, the alarm sound measuring device 100 is illustrated in which the microphone 100a and the measuring unit 100b are connected by the relay cable 100c, and the alarm sound measuring device 100 is driven by the battery 105 in the measuring unit 100b. However, the alarm sound measuring device is not limited to this, and for example, components such as a sound collection section and a judgment section may be housed in one housing, or the sound collection section and other components may be housed in one housing. The measurement unit equipped with the measurement unit and the measurement unit may be connected wirelessly. However, by connecting with the relay cable 100c and driving with the battery 105 in the measurement unit 100b, maintenance and replacing the battery 105 can be performed with good workability, and dissipation of the microphone 100a can be suppressed. The things that can be done are also as mentioned above.

Further, in the above-described embodiment, the alarm sound measuring device 100 is exemplified, which includes the signal processing unit 112 that performs filtering processing and amplification processing on the sound collection results. However, the alarm sound measurement device is not limited to this, and for example, the judgment section, data generation section, etc. may directly use the sound collection results to perform processing without including the signal processing section. However, filtering processing in the signal processing unit 112 allows selective measurement and processing of specific frequency bands, so processing accuracy can be improved in the judgment unit, data generation unit, etc. without being disturbed by noise other than the alarm sound S11. The points that can be improved are also as described above. As mentioned above, the amplification processing in the signal processing section 112 can also improve the processing accuracy, and furthermore, this amplification processing can stabilize the sound pressure measurement results by appropriately adjusting the amplification factor. That's exactly what I did. Here, in the above-mentioned embodiment, a mode in which the signal processing section 112 is included in the measurement unit 100b is illustrated. However, the position of the signal processing section is not limited to this, and may be inside the microphone. Furthermore, in the above-described embodiment, signal processing in which smoothing processing is added to both filtering processing and amplification processing is exemplified as an example of signal processing executed in the signal processing unit. The processing is not limited to this. The specific processing mode of this signal processing is not limited as long as it includes at least one of filtering processing and amplification processing.

Further, in the above-described embodiment, the alarm sound measuring device 100 including the sleep control section 117 is exemplified. However, the alarm sound measuring device is not limited to this. For example, the alarm sound measuring device may be configured to constantly perform processing such as sound collection, measurement data generation, and data output without providing a sleep control section. However, as mentioned above, the power saving effect can be obtained by providing the sleep control section.

Furthermore, in the above-described embodiment, the alarm sound measurement device 100 is exemplified in which the data generation unit 114 generates data representing the average value of the peak values of sound pressure and the number of times the peak appears per unit time as measurement data. ing. However, the alarm sound measuring device is not limited to this, and the specific form of the data does not matter as long as the data is based on the measurement results of the sound pressure and repetition period of the sound collected by the sound collecting section. However, as mentioned above, by generating data representing the average value of sound pressure peak values and the number of times the peak appears per unit time as measurement data, it is possible to better determine whether there is a functional decline in the speaker. That's exactly what I did.

Furthermore, in the above-described embodiment, the alarm sound measuring device 100 outputs measurement data after the sound pressure of the collected sound falls below the sounding end level EL11, that is, after the sounding of the alarm sound S11 ends. has been done. However, the alarm sound measuring device is not limited to this, and may output measurement data at any time after it is generated, even before the sound ends. However, as described above, by configuring to output the measurement data that has been generated all at once after the end of the ringing, power consumption related to data output can be suppressed and a power saving effect can be obtained.

Further, in the above-described embodiment, the device is used to measure railroad crossing warning sounds, but the measurement target is not limited to railroad crossings. For example, it may be applied to acoustic traffic lights for the visually impaired, broadcast system municipal disaster prevention administrative radio systems, and sirens that notify the release of water from dams. In this way, acoustic/alarm devices that require periodic inspection by maintenance personnel may require inspection in large quantities, work at heights, or locations that are difficult to access, such as mountainous areas. In addition to reducing the burden of inspection and maintenance work, by automatically acquiring acoustic data and transmitting it to the command server, changes in data can be grasped one by one, making it possible to predict and prevent failures.

1 Level crossing 2 Network unit 3 Command server 4 PC
11 Breaker 12 Alarm 12c Speaker 13 Level crossing equipment box 13-1 Overall control device 100 Alarm sound measuring device 100a Microphone 100b Measurement unit 100c Relay cable 101 Sound pressure sensor 102 Sensor board 103 Shield case 104 Main board 105 Battery 106 Communication board 107 Antenna 111 Sound collection section 112 Signal processing section 113 Judgment section 113a Measurement processing section 113b Judgment processing section 114 Data generation section 114a Generation processing section 116 Output section 117 Sleep control section EL11 Ringing end level P11 Peak R11 Railway R12 Road S11 Warning sound SL11 Ringing Start level T11 Repetition period TS11 First period TS12 Second period TS13 First waiting time TS14 First measurement time TS15 Second waiting time TS16 Second measurement time TS17 Startup waiting time TS18 Termination processing time

Claims (9)

An alarm sound measuring device that measures an alarm sound emitted by a speaker installed to call attention,
a sound collection unit installed near the speaker;
Whether or not the sound collected by the sound collection unit is the alarm sound is determined by determining whether the sound pressure of the sound exceeds a predetermined threshold and whether the sound is repeated at a repetition rate within a predetermined cycle range. a determination unit that determines based on both whether or not the sound is a sound that repeats the strength and weakness;
If it is determined that the sound collected by the sound collection unit is the alarm sound, after that determination, the sound pressure and repetition period of the sound collected by the sound collection unit are measured, and based on the measurement results. a data generation unit that generates measurement data;
an output unit that outputs the measurement data to a predetermined output destination;
An alarm sound measuring device comprising: The alarm sounds at a first sound pressure for a first period from the start of sounding, and sounds at a second sound pressure smaller than the first sound pressure for a second period after the first period elapses. It is the sound of
The alarm sound measurement device according to claim 1, wherein the data generation section generates the measurement data for sounds collected by the sound collection section in each of the first period and the second period. The data generation unit performs a first measurement after the sound pressure of the sound collected by the sound collection unit exceeds a ringing start level and a first waiting time corresponding to the determination time by the determination unit has elapsed. Measurement is performed over time, and after the first measurement time has elapsed, the measurement is performed over a second measurement time after a second waiting time that spans the switching from the first period to the second period has elapsed. The alarm sound measuring device according to claim 2, wherein the alarm sound measuring device performs the following. The alarm sound measuring device according to any one of claims 1 to 3, wherein the output section outputs the measurement data wirelessly. The determination unit, the data generation unit, and the output unit are installed in a measurement unit that generates and outputs the measurement data based on the sound collected by the sound collection unit,
The sound collection section is connected to the measurement unit via a relay cable,
According to any one of claims 1 to 4, the sound collection section, the judgment section, the data generation section, and the output section are driven by a battery mounted on the measurement unit. alarm sound measuring device. The alarm sound is a sound that sounds such that the amplitude of the sound in a predetermined frequency band increases or decreases,
Further comprising a signal processing unit that performs signal processing on the sound collection result by the sound collection unit, including at least one of filtering processing for extracting a component corresponding to a sound within the predetermined frequency band, and amplification processing. The alarm sound measuring device according to any one of claims 1 to 5, characterized in that: Claim further comprising: a sleep control unit that stops the operation of the sound collection unit, the determination unit, the data generation unit, and the output unit during the sleep period when a predetermined sleep period arrives. The alarm sound measuring device according to items 1 to 6. The data generation unit measures, over a predetermined measurement time, a peak value of sound pressure that repeatedly appears in response to the ringing of the sound collected by the sound collection unit, and also measures the appearance of the peak of sound pressure at the measurement time. The method is characterized in that an interval is measured as the repetition period, and data representing the average value of the peak values and the number of appearances of the peak per unit time calculated from the repetition period is generated as the measurement data. The alarm sound measuring device according to any one of claims 1 to 7. The alarm according to claim 1, wherein the output section outputs the measurement data after a peak value of the sound pressure of the sound collected by the sound collection section falls below a ringing end level. Sound measurement device.

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