CN103499388A - System and method for detecting sound transmission characteristics of tunnel multi-section - Google Patents
System and method for detecting sound transmission characteristics of tunnel multi-section Download PDFInfo
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- CN103499388A CN103499388A CN201310495550.0A CN201310495550A CN103499388A CN 103499388 A CN103499388 A CN 103499388A CN 201310495550 A CN201310495550 A CN 201310495550A CN 103499388 A CN103499388 A CN 103499388A
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Abstract
The invention relates to a system and method for detecting sound transmission characteristics of a tunnel multi-section, and belongs to the technical field of measurement of noise transmission characteristics of tunnels. The system for detecting sound transmission characteristics of the tunnel multi-section comprises a host computer, a host controller, section sub-controllers, wireless external synchronization sound wave acquisition modules, wireless access points and the like, wherein the host computer, the host controller, the section sub-controller on each section, and the wireless external synchronization sound wave acquisition module of each acquisition point are sequentially connected, and the wireless access points are respectively connected with the wireless external synchronization sound wave acquisition modules, the host computer and a mobile sound source. The invention also provides a method for detecting sound transmission characteristics of the tunnel multi-section. The sub-section multi-point measuring method is adopted, and the system is flexible and has stronger practicality; a WIFI network is established on the basis of wireless access points, so that the problems of laying difficulty and easiness in interference production of wired cables in tunnel multi-point measurement are solved in the installation work; and the reliability and validity of noise data transmission are ensured.
Description
Technical field
The present invention be more particularly directed to multibreak of a kind of tunnel sound transmission characteristics detection system and method, belong to Tunnel Noise acoustic propagation feature measurement field.
Background technology
Hemi-closure space structure due to existing tunnel arch, circle or rectangle, sound arrives the interface, tunnel can produce acoustic reflection, its direct sound wave can with the sound wave aliasing after the wall Multi reflection, the sound wave that is different frequency, amplitude and time is superposeed or is subdued in zones of different, cause in tunnel boosting and become large, form noise rule special in the tunnel, produced larger noise figure.The noise intensity that the intensity of this noise produces when vehicle passes through free field, brought harmful effect to the driver and conductor.Reduce the harm that Tunnel Noise brings, first will understand the rule that noise is propagated in tunnel, then according to the Characteristics Control noise of acoustic propagation in tunnel.Therefore in tunnel, the research of acoustic propagation characteristic is one of gordian technique of tunnel noise reduction.
In tunnel, noise source mainly contains traffic noise that the engine noise of vehicle and tire and pavement friction bring and the noise of ventilation blower, obtain the sound field structure in tunnel, find out the acoustic propagation characteristic of noise in tunnel, the sound field of diverse location is distributed and is measured, just need in tunnel, install tens even a hundreds of probe measured.Because space in tunnel is large, and require the propagation law of measurement accurate, the impact that simultaneously also needs measuring vehicle to move and bring to the sound field structure, and existing measuring equipment adopts PC control multi-path-apparatus to be measured more, measuring equipment mostly is two-channel or 4 channel devices, can't meet the measurement requirement, even can extend at present 16 or 32 sound channels, measurement mechanism also can't be realized the measurement of the dozens or even hundreds of point in tunnel.Although can adopt a plurality of wireless acoustic wave sensor to carry out sound collecting, with equipment records sound waves such as MP3, can't reach the purpose of synchronous acquisition; And existing measuring equipment adopts wire cable to connect more, but, for multimetering in tunnel, the laying of wire cable not only difficulty is high, and interference is large.Therefore, study the acoustic propagation characteristic in tunnel, with regard to routing motion sound source in a kind of tunnel of needs, carry out the 3-D wireless acoustic propagation Characteristics Detection that the system of Multipoint synchronous sound collecting is carried out outward.(english abbreviation herein: 1, WIFI, referring to can be by each Terminal Type with the interconnected technology of wireless mode; 2, A/D, refer to analog signal conversion is become to digital signal.）
Summary of the invention
The present invention can't the Multipoint synchronous collection for overcoming prior art, and adopts wire cable to carry out the signal transmission more, builds difficulty, and the large deficiency of interference, and multibreak of a kind of tunnel sound transmission characteristics detection system and method are provided.
Multibreak of a kind of tunnel sound transmission characteristics detection system, this system comprises: main control computer, master controller, section sub-controller, wireless outer synchronous sound collecting module, WAP and mobile sound source; Wherein,
Described main control computer, for controlling the overall operation of this system, and coordinate with the isochronous controller in primary controller, section iversion controller and wireless outer synchronous acquisition front end, wireless outer synchronous sound collecting front end work in outer synchronous acquisition module that co-controlling is wireless, send corresponding work order and receive the data that collect, carrying out data analysis;
Described master controller, for receiving the sound collecting order sent from main control computer, give each section sub-controller by netting twine communication synchronized transmission afterwards;
Described section sub-controller, the sound collecting order sent for receiving master controller, control all wireless outer synchronous sound collecting module work in its place section;
Described wireless outer synchronous sound collecting module, comprise infrared transmitter, isochronous controller and wireless outer synchronous sound collecting front end three parts, for the acoustic signals synchronous acquisition on each collection point;
Described WAP, wireless base station used when providing wireless outer synchronous sound collecting front end and main control computer to set up wireless connections, make wireless outer synchronous sound collecting module send the acoustic signals collected to main control computer by wireless network; Wireless base station used when providing mobile sound source and main control computer to set up wireless connections, make main control computer by wireless telecommunications to the mobile sound source transmission order of starting working;
Described mobile sound source, for the noise frequency the sent voice signal identical with amplitude in tunnel at the test process simulating vehicle;
Described main control computer is connected successively with the wireless outer sound collecting module of synchronizeing of section iversion controller on primary controller, cross sections and each collection point;
Described WAP is connected with wireless outer sound collecting module, main control computer and the mobile sound source of synchronizeing respectively.
Described primary controller is comprised of serial communication circuit, Temperature Detector, single-chip microcomputer, A/D reference voltage circuit and a network communication module; Wherein,
A described single-chip microcomputer is connected with serial communication circuit, Temperature Detector, A/D reference voltage circuit and a network communication module respectively;
Described serial communication circuit is connected with main control computer.
Described section iversion controller is comprised of infrared control circuit, No. two single-chip microcomputers, charging circuit, control module and No. two network communication modules; Wherein,
Described No. two single-chip microcomputers are connected with infrared control circuit, charging circuit, control module and No. two network communication modules respectively;
Described No. two network communication modules are connected with a network communication module.
Described wireless outer synchronous sound collecting module is comprised of infrared transmitter, wireless outer synchronous sound collecting front end and isochronous controller; Wherein,
Described wireless outer synchronous sound collecting front end is connected with isochronous controller with WAP respectively;
Described infrared transmitter is connected with infrared control circuit;
Described isochronous controller is comprised of photoelectrical coupler, collection front-end driven circuit and infrared circuit; Wherein, described collection front-end driven circuit is connected with the wireless outer sound collecting front end of synchronizeing with photoelectrical coupler respectively;
Described infrared detection circuit is connected with the wireless outer sound collecting front end of synchronizeing.
All WAPs are set up into a WIFI network together with wireless outer wireless outer synchronous sound collecting front end, main control computer of synchronizeing in the sound collecting module.
Multibreak of a kind of tunnel sound transmission characteristics detection method, the method comprises the following steps:
Step 1: build multibreak of described a kind of tunnel of claim 1 sound transmission characteristics detection system;
Simultaneously, take section as an elementary cell, the wireless outer synchronous sound collecting module of installation that evenly is net distribution on the two dimensional surface of each section, then in a side of each section, corresponding section sub-controller and WAP are installed, again computing machine, master controller and power supply are installed, finally mobile sound source is placed in to the tunnel portal place;
Step 2: main control computer is set up wireless connections with mobile sound source and the wireless outer sound collecting front end of synchronizeing by WAP;
Step 3: main control computer output test acoustic signals, and send to mobile sound source the order of starting working, send the sound collecting order to master controller;
Step 4: master controller feeds back to computing machine after receiving the sound collecting order, afterwards this command synchronization is sent to the section sub-controller of each section; Mobile sound source receives mobile sounding in the backward tunnel of the order of starting working the simulating vehicle various situations in advancing;
Step 5: the section sub-controller feeds back to master controller after receiving order, and the order of sending according to master controller, control each infrared transmitter synchronized transmissions infrared signal in its place section or the control module synchronized transmission sound collecting order by wired connection to isochronous controller;
Step 6: the isochronous controller in wireless outer synchronous sound collecting module detects synchronous infrared signal or receives synchronizable optical electric coupling signal, starts wireless outer synchronous sound collecting front end in wireless outer synchronous sound collecting module and starts the Multipoint synchronous collection signal;
Step 7: wireless outer synchronous sound collecting front end synchronously starts, and gathers the acoustic signals in tunnel, and the acoustic signals collected is temporarily stored in inner storer;
Step 8: main control computer by with the wireless outer wireless connections that the sound collecting front end sets up of synchronizeing, read each and gather temporary data in front end, and be kept in the storer of main control computer;
Step 9: the sonic data that main control computer arrives according to wireless outer synchronous sound collecting front-end collection, the data of each measurement point are analyzed, realize the research to the acoustic propagation characteristic in tunnel.
Beneficial effect of the present invention:
1. the present invention adopts the method for minute section multimetering, from three dimensions to tunnel not in the same time the sound wave of diverse location gathered, not only overcome existing measuring equipment sound channel and can not meet the shortcoming of tunnel multimetering less, and system flexibly teaming method also make system can carry out flexibly the establishment of three-dimensional space measurement system, there is stronger practicality.
2. the present invention uses the WIFI network of setting up based on WAP, and the difficulty and the easy problem of disturbing that produces that make installment work avoid multimetering wire cable in tunnel to lay are more convenient and flexible; Wireless outer synchronous Tunnel Noise acquisition module has the data buffering function, can when the communication jam situation, guarantee reliability and the validity of noise data transmission.
3. the present invention adopts the infrared signal generator to realize the synchronous acquisition of a plurality of Tunnel Noise measurement points, has solved wireless WIFI and has had time delay, can not realize the problem of synchronous acquisition function.
The accompanying drawing explanation
Fig. 1 is topology layout figure of the present invention;
The integrated connection figure that Fig. 2 is the embodiment of the present invention;
Fig. 3 is the wireless outer synchronous sound collecting fore device structural representation of the present invention;
Fig. 4 is work implementation step schematic diagram of the present invention;
Fig. 5 is collecting device workflow diagram of the present invention;
Fig. 6 is mobile sound source workflow diagram of the present invention;
Number in the figure: 1-section; Outer synchronous sound collecting module that 2-is wireless; 3-section sub-controller; The 4-WAP; 5-moves sound source; The 6-power supply; The 7-master controller; The 8-main control computer.
Embodiment
The invention provides multibreak sound transmission characteristics detection system in a kind of tunnel, below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, multibreak of a kind of tunnel sound transmission characteristics detection system, this system comprises: main control computer, master controller, section sub-controller, wireless outer synchronous sound collecting module, WAP and mobile sound source; Wherein,
Described main control computer, for controlling the overall operation of this system, and coordinate with primary controller, section iversion controller and wireless outer isochronous controller of synchronizeing in the sound collecting module, in outer synchronous sound collecting module that co-controlling is wireless, wireless outer synchronous sound collecting front end is started working simultaneously, send corresponding work order and receive the data that collect, carrying out data analysis;
Described master controller, only arrange one in the present invention in whole system, for receiving the sound collecting order sent from main control computer, give each section sub-controller by netting twine communication synchronized transmission afterwards;
Described section sub-controller, measure section at each and arrange one, and the sound collecting order sent for receiving master controller, control all wireless outer synchronous sound collecting module work in its place section;
Described wireless outer synchronous sound collecting module, measure at each the number that section is set this module that needs installation according to the actual needs, synchronous acquisition for acoustic signals in tunnel, comprise infrared transmitter, isochronous controller and wireless outer sound wave synchronous acquisition front end three parts; Gather the acoustic signals in tunnel, adopt infrared signal synchronous, antijamming capability is strong, guarantees the signal of collection synchronously, accurately, the signal analysis work after being convenient to;
Described WAP, wireless base station used when providing wireless outer synchronous sound collecting front end and main control computer to set up wireless connections, make wireless outer synchronous sound collecting module send the acoustic signals collected to main control computer by wireless network; Wireless base station used when providing mobile sound source and main control computer to set up wireless connections, make main control computer by wireless telecommunications to the mobile sound source transmission order of starting working;
Described mobile sound source, for the moving process in tunnel at the test process simulating vehicle, sound source itself has the ability of playing tone burst, realizes the static of sound source or mobile after the installation mobile device, has solved the measurement of the acoustic propagation characteristic in tunnel in dynamic, static two kinds of situations.After system is started working, mobile sound source is sent the voice signal identical with amplitude with the noise frequency sent in the vehicle operating process, communication process with the analogue noise sound wave in tunnel, when measuring the propagation characteristic of noise own, also can measure the impact of Doppler effect for noise transmission;
The wireless outer synchronous sound collecting module of the section iversion controller on described main control computer, primary controller, cross sections and each collection point is connected successively;
Described WAP is set up wireless telecommunications with wireless outer sound collecting module, main control computer and the mobile sound source of synchronizeing in wireless outer synchronous acquisition front end respectively.
Described primary controller is comprised of serial communication circuit, Temperature Detector, single-chip microcomputer, A/D reference voltage circuit and a network communication module.Wherein, a described single-chip microcomputer and serial communication circuit for receiving the order sended over by main control computer, and feed back to main control computer after receiving orders; A described single-chip microcomputer is connected respectively with Temperature Detector, A/D reference voltage circuit, for controlling temperature monitoring and the work of A/D reference voltage circuit; A described single-chip microcomputer is connected with a network communication module, for the section sub-controller, by netting twine, setting up communication; Described serial communication circuit is connected with main control computer.
Described section iversion controller is comprised of infrared control circuit, No. two single-chip microcomputers, charging circuit, control module and No. two network communication modules.Wherein, described No. two single-chip microcomputers are connected with infrared control circuit, by controlling infrared control circuit, make infrared transmitter emission infrared ray; Described No. two single-chip microcomputers are connected with charging circuit, for giving the charging of section sub-controller; Described No. two single-chip microcomputers are connected with control module, the alternative scheme of abnormal conditions occurs as infrared control module; Described No. two single-chip microcomputers are connected with No. two network communication modules, for receiving the order that master controller sends and being fed back; Described No. two network communication modules are connected with a network communication module, with master controller, set up communication.
Described wireless outer synchronous sound collecting module is comprised of infrared transmitter, wireless outer synchronous sound collecting front end and isochronous controller; Wherein, described isochronous controller is connected with the wireless outer sound collecting front end of synchronizeing, for all described single-chip microcomputers and synchronous acquisition sound wave in control section; Described infrared transmitter is connected with infrared control circuit, receives the ultrared order of emission emission infrared signal that the section sub-controller sends; Described wireless outer synchronous sound collecting front end and main control computer are set up wireless telecommunications by WAP, the acoustic signals collected for transmission.
Described isochronous controller is comprised of photoelectrical coupler, collection front-end driven circuit and infrared circuit; Wherein, described infrared detection circuit is connected with the wireless outer sound collecting front end of synchronizeing, for controlling wireless outer synchronous sound collecting front end synchronous acquisition signal; Described photoelectrical coupler is connected with collection front-end driven circuit with the control module of section sub-controller respectively; Described collection front-end driven circuit is connected with the wireless outer sound collecting front end of synchronizeing with photoelectrical coupler respectively, detect for infrared signal the abnormal situation that occurs, the section sub-controller sends the mode of order by the photoelectrical coupler of wired connection, control wireless outer synchronous sound collecting front-end collection acoustic signals.
All WAPs are set up into a WIFI network.
As shown in Figure 2, system divides section, a minute grid to be built to the complete layout of system embodiment, and each section 1 is a fundamental measurement unit, comprises a section sub-controller 3, tens measurement points and WAPs 4 in each fundamental measurement unit.Measurement point becomes on the latticed two dimensional surface that is evenly distributed on section, and each measurement point is installed a set of wireless outer synchronous sound collecting module 2.
Wireless outer synchronous sound collecting front end, isochronous controller and infrared transmitter in the interior all wireless outer synchronous sound collecting modules 2 of section 1 are connected with the section sub-controller 3 in this section respectively;
Master controller 7 is connected with main control computer 8;
As shown in Figure 3, wireless outer synchronous sound collecting fore device comprises digital signal processor, flash chip, audio A/D converter, wireless module, static RAM, infrared receiver module, RS-232 communication interface communication converter, signal amplification circuit, sound collecting Mike's interface and headset output interface; Wherein:
Described digital signal processor is connected with flash chip, audio A/D converter, wireless module, static RAM, infrared receiver module and RS-232 communication interface communication converter respectively;
Described signal amplification circuit is connected with audio A/D converter;
Described signal amplification circuit is connected with headset output interface with sound collecting Mike interface respectively.
As shown in Figure 4, multibreak of a kind of tunnel sound transmission characteristics detection method, the method comprises the following steps:
Step 1: build multibreak of described a kind of tunnel of claim 1 sound transmission characteristics detection system;
Simultaneously, take section as an elementary cell, the wireless outer synchronous sound collecting module of installation that evenly is net distribution on the two dimensional surface of each section, then in a side of each section, corresponding section sub-controller and WAP are installed, again computing machine, master controller and power supply are installed, finally mobile sound source is placed in to the tunnel portal place;
Step 2: main control computer is set up wireless connections with mobile sound source and the wireless outer sound collecting front end of synchronizeing by WAP;
Step 3: after starting working, main control computer output test acoustic signals, and send to mobile sound source the order of starting working, send the sound collecting order to master controller;
Step 4: master controller feeds back to computing machine after receiving the sound collecting order, afterwards this command synchronization is sent to the section sub-controller of each section; Mobile sound source receives mobile sounding in the backward tunnel of the order of starting working the simulating vehicle various situations in advancing;
Step 5: the section sub-controller feeds back to master controller after receiving order, and the order of sending according to master controller, control each infrared transmitter synchronized transmissions infrared signal in its place section or the control module synchronized transmission sound collecting order by wired connection to isochronous controller;
Step 6: the isochronous controller in wireless outer synchronous sound collecting module detects synchronous infrared signal or receives synchronizable optical electric coupling signal, starts wireless outer synchronous sound collecting front end in wireless outer synchronous sound collecting module and starts the Multipoint synchronous collection signal;
Step 7: wireless outer synchronous sound collecting front end synchronously starts, and gathers the acoustic signals in tunnel, and the acoustic signals collected is temporarily stored in inner storer;
Step 8: main control computer by with the wireless outer wireless connections that the sound collecting front end sets up of synchronizeing, read each and gather temporary data in front end, and be kept in the storer of main control computer;
Step 9: the sonic data that main control computer arrives according to wireless outer synchronous sound collecting front-end collection, the data of each measurement point are analyzed, realize the research to the acoustic propagation characteristic in tunnel;
As shown in Figure 5, system is controlled and is started working by main control computer.After beginning, at first main control computer sets up wireless connections with the wireless outer sound collecting front end of synchronizeing, then main control computer sends the sound collecting order to master controller, master controller feeds back to main control computer after receiving order, if main control computer is not received feedback, can again to master controller, send the sound collecting order; After master controller receives this order, then to each section sub-controller synchronized transmission, can be to the master controller feedback signal after the section sub-controller receives orders, if send unsuccessfully, master controller can send this order again to the section sub-controller; After the section sub-controller is received this order, control all infrared transmitter synchronized transmissions infrared signals in its place section or the control module by wired connection sends the sound collecting order, after the infrared signal that infrared circuit in isochronous controller detects or collection front-end driven circuit receive the sound collecting order of photoelectrical coupler transmission, control wireless outer synchronous sound collecting front end and start the synchronous acquisition voice signal; Wireless outer synchronous sound collecting frontal startup, gather the acoustic signals in tunnel, the signal collected is temporarily stored in inner storer after completing sound collecting; Main control computer by with the wireless outer wireless telecommunications that the sound collecting front end sets up of synchronizeing, read one by one the acoustic signals that wireless outer synchronous sound collecting module collects.
As shown in Figure 6, after system is started working, each module receives the order of collection signal, just controls mobile sound and starts working.At first main control computer sets up wireless connections with mobile sound source by WAP, and after successful connection, main control computer sends the order of starting working to mobile sound, and mobile sound source starts to send the sound of simulating vehicle process and starts to move in tunnel.
The present invention adopts the method for minute section multimetering, from three dimensions to tunnel not in the same time the sound wave of diverse location gathered, overcome existing measuring equipment sound channel and can not meet the shortcoming of tunnel multimetering less, system teaming method flexibly also makes system can carry out flexibly the establishment of three-dimensional space measurement system, has stronger practicality.Simultaneously, use the WIFI network of setting up based on WAP, the difficulty and the easy problem of disturbing that produces that make installment work avoid multimetering wire cable in tunnel to lay, more convenient and flexible; Wireless outer synchronous Tunnel Noise acquisition module has the data buffering function, can when the communication jam situation, guarantee reliability and the validity of noise data transmission.System also adopts the infrared signal generator to realize the synchronous acquisition of a plurality of Tunnel Noise measurement points, has solved wireless WIFI and has had time delay, can not realize the problem of synchronous acquisition function.
Claims (6)
1. multibreak of a tunnel sound transmission characteristics detection system, is characterized in that, this system comprises: main control computer, master controller, section sub-controller, wireless outer synchronous sound collecting module, WAP and mobile sound source; Wherein,
Described main control computer, for controlling the overall operation of this system, with primary controller, section iversion controller and wireless outer isochronous controller of synchronizeing in the sound collecting module, coordinate simultaneously, wireless outer synchronous sound collecting front end work in outer synchronous sound collecting module that co-controlling is wireless, send corresponding work order and receive the data that collect, carrying out data analysis;
Described master controller, for receiving the sound collecting order sent from main control computer, give each section sub-controller by netting twine communication synchronized transmission afterwards;
Described section sub-controller, the sound collecting order sent for receiving master controller, control all wireless outer synchronous sound collecting module work in its place section;
Described wireless outer synchronous sound collecting module, comprise infrared transmitter, isochronous controller and wireless outer synchronous sound collecting front end three parts, for the signal synchronous collection on each collection point;
Described WAP, wireless base station used when providing wireless outer synchronous sound collecting front end and main control computer to set up wireless connections, make wireless outer synchronous sound collecting module send the acoustic signals collected to main control computer by wireless network; Wireless base station used when providing mobile sound source and main control computer to set up wireless connections, make main control computer by wireless telecommunications to the mobile sound source transmission order of starting working;
Described mobile sound source, for the noise frequency the sent voice signal identical with amplitude in tunnel at the test process simulating vehicle;
Described main control computer is connected successively with the wireless outer sound collecting module of synchronizeing of section iversion controller on primary controller, cross sections and each collection point;
Described WAP is connected with wireless outer sound collecting module, main control computer and the mobile sound source of synchronizeing respectively.
2. multibreak of a kind of tunnel sound transmission characteristics detection system according to claim 1, is characterized in that, described primary controller is comprised of serial communication circuit, Temperature Detector, single-chip microcomputer, A/D reference voltage circuit and a network communication module; Wherein,
A described single-chip microcomputer is connected with serial communication circuit, Temperature Detector, A/D reference voltage circuit and a network communication module respectively;
Described serial communication circuit is connected with main control computer.
3. multibreak of a kind of tunnel sound transmission characteristics detection system according to claim 1, is characterized in that, described section iversion controller is comprised of infrared control circuit, No. two single-chip microcomputers, charging circuit, control module and No. two network communication modules; Wherein,
Described No. two single-chip microcomputers are connected with infrared control circuit, charging circuit, control module and No. two network communication modules respectively;
Described No. two network communication modules are connected with a network communication module.
4. multibreak of a kind of tunnel sound transmission characteristics detection system according to claim 1, is characterized in that, described wireless outer synchronous sound collecting module is comprised of infrared transmitter, wireless outer synchronous sound collecting front end and isochronous controller; Wherein,
Described wireless outer synchronous sound collecting front end is connected with isochronous controller with WAP respectively;
Described infrared transmitter is connected with infrared control circuit;
Described isochronous controller is comprised of photoelectrical coupler, collection front-end driven circuit and infrared circuit; Wherein, described collection front-end driven circuit is connected with the wireless outer sound collecting front end of synchronizeing with photoelectrical coupler respectively;
Described infrared detection circuit is connected with the wireless outer sound collecting front end of synchronizeing.
5. multibreak of a kind of tunnel sound transmission characteristics detection system according to claim 1, it is characterized in that, described all WAPs are set up into a WIFI network jointly with wireless outer wireless outer synchronous sound collecting front end, main control computer of synchronizeing in the sound collecting module.
6. multibreak of a tunnel sound transmission characteristics detection method, is characterized in that, the method comprises the following steps:
Step 1: build multibreak of described a kind of tunnel of claim 1 sound transmission characteristics detection system;
Simultaneously, take section as an elementary cell, the wireless outer synchronous sound collecting module of installation that evenly is net distribution on the two dimensional surface of each section, then in a side of each section, corresponding section sub-controller and WAP are installed, again computing machine, master controller and power supply are installed, finally mobile sound source is placed in to the tunnel portal place;
Step 2: main control computer and mobile sound source and wireless outer synchronous acquisition front end are set up wireless connections by WAP;
Step 3: main control computer output test acoustic signals, and send to mobile sound source the order of starting working, send the sound collecting order to master controller;
Step 4: master controller feeds back to computing machine after receiving the sound collecting order, afterwards this command synchronization is sent to the section sub-controller of each section; Mobile sound source receives mobile sounding in the backward tunnel of the order of starting working the simulating vehicle situation in advancing;
Step 5: the section sub-controller feeds back to master controller after receiving order, and the order of sending according to master controller, control each infrared transmitter synchronized transmissions infrared signal in its place section or the control module synchronized transmission sound collecting order by wired connection to isochronous controller;
Step 6: the isochronous controller in wireless outer synchronous sound collecting module detects synchronous infrared signal or receives synchronizable optical electric coupling signal, starts wireless outer synchronous sound collecting front end in wireless outer synchronous sound collecting module and starts the Multipoint synchronous collection signal;
Step 7: wireless outer synchronous sound collecting front end synchronously starts, and gathers the acoustic signals in tunnel, and the acoustic signals collected is temporarily stored in inner storer;
Step 8: main control computer by with the wireless outer wireless connections that the sound collecting front end sets up of synchronizeing, read each and gather temporary data in front end, and be kept in the storer of main control computer;
Step 9: the sonic data that main control computer arrives according to wireless outer synchronous sound collecting front-end collection is analyzed the data of each measurement point;
Like this, just realized the research to the acoustic propagation characteristic in tunnel.
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| CN109488328A (en) * | 2018-12-21 | 2019-03-19 | 中铁二十二局集团第三工程有限公司 | A kind of multiple noise reduction composite structure in railway tunnel outlet |
| CN111474380A (en) * | 2020-04-26 | 2020-07-31 | 中煤科工集团重庆研究院有限公司 | Multi-section grid observation method and system for roadway wind speed |
| CN111474380B (en) * | 2020-04-26 | 2021-11-02 | 中煤科工集团重庆研究院有限公司 | Multi-section grid observation method and system for roadway wind speed distribution |
| CN111750979A (en) * | 2020-07-06 | 2020-10-09 | 奥来国信（北京）检测技术有限责任公司 | Multi-point noise detection method, device and system |
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