CN103499388B - 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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- CN103499388B CN103499388B CN201310495550.0A CN201310495550A CN103499388B CN 103499388 B CN103499388 B CN 103499388B CN 201310495550 A CN201310495550 A CN 201310495550A CN 103499388 B CN103499388 B CN 103499388B
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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
Due to the hemi-closure space structure of existing tunnel arch, circle or rectangle, sound arrives tunnel interfaces can produce acoustic reflection, its direct sound wave can with the sound wave aliasing after wall multiple reflections, namely different frequency, amplitude and the sound wave of time carry out superposing or cutting down in zones of different, boosting in tunnel is caused to become large, define noise rule special in tunnel, create larger noise figure.The noise intensity that the intensity of this noise produces much larger than vehicle through free field, brings harmful effect to 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 the research of acoustic propagation characteristic is one of gordian technique of tunnel noise reduction in tunnel.
In tunnel, noise source mainly contains the noise of traffic noise that the engine noise of vehicle and tire and pavement friction bring and ventilation blower, obtain the sound field structure in tunnel, find out the acoustic propagation characteristic of noise in tunnel, the sound-filed simulation of diverse location is measured, just need install in tunnel tens even a hundreds of probe measure.Because in tunnel, space is large, and require that the propagation law measured is accurate, also need measuring vehicle to move the impact brought to sound field structure simultaneously, and existing measuring equipment many employings PC control multi-path-apparatus is measured, measuring equipment mostly is two-channel or 4 channel devices, cannot meet measurement requirement, even if current easily extensible to 16 or 32 sound channels, measurement mechanism also cannot realize the measurement of the dozens or even hundreds of point in tunnel.Although multiple wireless acoustic wave sensor can be adopted to carry out sound collecting, with equipment record sound waves such as MP3, the object of synchronous acquisition cannot be reached; And existing measuring equipment many employings wire cable connects, but for multimetering in tunnel, not only difficulty is high in the laying of wire cable, and interference is large.Therefore, the acoustic propagation characteristic in tunnel be studied, the acoustic propagation Characteristics Detection that the system with regard to needing routing motion sound source in a kind of tunnel to carry out the outer Multipoint synchronous sound collecting of 3-D wireless is carried out.(english abbreviation herein: 1, WIFI, refers to the technology that each Terminal Type wirelessly can be connected to each other; 2, A/D, refers to convert simulating signal to digital signal.）
Summary of the invention
The present invention cannot Multipoint synchronous collection for overcoming prior art, and the wire cable that adopts carries out Signal transmissions more, builds difficulty, and the deficiency that interference is large, provide multibreak of a kind of tunnel sound transmission characteristics detection system and method.
A kind of multibreak 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 moving sound; 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 also receive the data collected, carry out data analysis;
Described master controller, for receiving the sound collecting order sent from main control computer, gives each section sub-controller by netting twine communication synchronized transmission afterwards;
Described section sub-controller, for receiving the sound collecting order that master controller sends, controls all wireless outer synchronous sound collecting module work in its place section;
Described wireless outer synchronous sound collecting module, comprises infrared transmitter, isochronous controller and wireless outer synchronous sound collecting front end three part, the acoustic signals synchronous acquisition on each collection point;
Described WAP, wireless base station used when setting up wireless connections for providing wireless outer synchronous sound collecting front end and main control computer, makes wireless outer synchronous sound collecting module send the acoustic signals collected to main control computer by wireless network; Wireless base station used when setting up wireless connections for providing moving sound and main control computer, makes main control computer send order of starting working to moving sound by wireless telecommunications;
Described moving sound, for the voice signal that the noise frequency that send of simulating vehicle in test process in tunnel is identical with amplitude;
Described main control computer is connected successively with the wireless outer synchronous sound collecting module of the section iversion controller on primary controller, cross sections and each collection point;
Described WAP is connected with moving sound with wireless outer synchronous sound collecting module, main control computer respectively.
Described primary controller is made up 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 a network communication module with serial communication circuit, temperature detector, A/D reference voltage circuit respectively;
Described serial communication circuit is connected with main control computer.
Described section iversion controller is made up of infrared control circuit, No. two single-chip microcomputers, charging circuit, control module and No. two network communication module; Wherein,
Described No. two single-chip microcomputers are connected with No. two network communication module with infrared control circuit, charging circuit, control module respectively;
Described No. two network communication module are connected with a network communication module.
Described wireless outer synchronous sound collecting module is made up 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 made up of photoelectrical coupler, collection front-end driven circuit and infrared circuit; Wherein, described collection front-end driven circuit is connected with wireless outer synchronous sound collecting front end with photoelectrical coupler respectively;
Described infrared detection circuit is connected with wireless outer synchronous sound collecting front end.
All WAPs set up into a WIFI network together with the wireless outer synchronous sound collecting front end in wireless outer synchronous sound collecting module, main control computer.
A kind of multibreak of tunnel sound transmission characteristics detection method, the method comprises the following steps:
Step 1: build multibreak of a kind of tunnel described in claim 1 sound transmission characteristics detection system;
Simultaneously, be an elementary cell with section, the wireless outer synchronous sound collecting module of installation evenly in net distribution on the two dimensional surface of each section, then in the side of each section, corresponding section sub-controller and WAP are installed, again computing machine, master controller and power supply are installed, finally moving sound is placed in tunnel portal place;
Step 2: main control computer sets up wireless connections with moving sound and wireless outer synchronous sound collecting front end by WAP;
Step 3: main control computer exports test acoustic signals, and send to moving sound order of starting working, send sound collecting order to master controller;
Step 4: master controller feeds back to computing machine after receiving sound collecting order, afterwards this command synchronization is sent to the section sub-controller of each section; Moving sound receive mobile sounding in the backward tunnel of order of starting working and simulating vehicle advance in various situations;
Step 5: section sub-controller feeds back to master controller after receiving order, and according to the order that master controller is sent, control each infrared transmitter synchronized transmissions infrared signal in its place section or by the control module synchronized transmission sound collecting order of 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 Multipoint synchronous collection signal;
Step 7: wireless outer synchronous sound collecting front end synchronous averaging, gathers the acoustic signals in tunnel, and is temporarily stored in by the acoustic signals collected in inner storer;
Step 8: the wireless connections of main control computer by setting up with wireless outer synchronous sound collecting front end, reads each and gathers the data of keeping 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, realizes the research to the acoustic propagation characteristic in tunnel.
Beneficial effect of the present invention:
1. the present invention adopts the method for point section multimetering, from three dimensions to tunnel not in the same time the sound wave of diverse location gather, not only overcome the shortcoming that existing measuring equipment sound channel can not meet tunnel multimetering less, and system flexibly teaming method also make system can carry out the establishment of three-dimensional space measurement system flexibly, there is stronger practicality.
2. the present invention uses the WIFI network set up based on WAP, makes installment work avoid the difficulty that multimetering wire cable in tunnel is laid and the problem easily producing interference, more convenient and flexible; Wireless outer synchronous Tunnel Noise acquisition module has data buffering function, can ensure reliability and the validity of noise data transmission when communication jam situation.
3. the present invention adopts infrared signal generator to realize the synchronous acquisition of multiple Tunnel Noise measurement point, solves wireless WIFI and there is time delay, can not realize the problem of synchronous acquisition function.
Accompanying drawing explanation
Fig. 1 is topology layout figure of the present invention;
Fig. 2 is the integrated connection figure of 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 moving sound 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; 4-WAP; 5-moving sound; 6-power supply; 7-master controller; 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 moving sound; 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 sound collecting module, in outer synchronous sound collecting module that co-controlling is wireless, start working in wireless outer synchronous sound collecting front end simultaneously, send corresponding work order and also receive the data collected, carry out data analysis;
Described master controller, only arranges one in whole system in the present invention, for receiving the sound collecting order sent from main control computer, gives each section sub-controller afterwards by netting twine communication synchronized transmission;
Described section sub-controller, arranges one at each Measure section, for receiving the sound collecting order that master controller sends, controls all wireless outer synchronous sound collecting module work in its place section;
Described wireless outer synchronous sound collecting module, the number of this module needing to install is set according to the actual needs at each Measure section, for the synchronous acquisition of acoustic signals in tunnel, comprise infrared transmitter, isochronous controller and wireless outer sound wave synchronous acquisition front end three part; Gather the acoustic signals in tunnel, adopt infrared signal synchronously, antijamming capability is strong, ensures that the signal gathered is synchronous, accurate, the signal analysis work after being convenient to;
Described WAP, wireless base station used when setting up wireless connections for providing wireless outer synchronous sound collecting front end and main control computer, makes wireless outer synchronous sound collecting module send the acoustic signals collected to main control computer by wireless network; Wireless base station used when setting up wireless connections for providing moving sound and main control computer, makes main control computer send order of starting working to moving sound by wireless telecommunications;
Described moving sound, for the moving process of simulating vehicle in test process in tunnel, sound source itself has plays the ability of tone burst, realizes the static of sound source or mobile after installing mobile device, solves dynamically, the measurement of acoustic propagation characteristic in static two kinds of situations in tunnel.After system starts, moving sound sends the voice signal identical with amplitude with the noise frequency sent in vehicle operation, with the communication process of analogue noise sound wave in tunnel, while the propagation characteristic of measurement noises 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 sets up wireless telecommunications with outer synchronous sound collecting module wireless in wireless outer synchronous acquisition front end, main control computer and moving sound respectively.
Described primary controller is made up 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 control temperature monitor and the work of A/D reference voltage circuit; A described single-chip microcomputer is connected with a network communication module, for setting up communication with section sub-controller by netting twine; Described serial communication circuit is connected with main control computer.
Described section iversion controller is made up of infrared control circuit, No. two single-chip microcomputers, charging circuit, control module and No. two network communication module.Wherein, described No. two single-chip microcomputers are connected with infrared control circuit, make infrared transmitter launch infrared ray by controlling infrared control circuit; 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, occur the alternative scheme of abnormal conditions as infrared control module; Described No. two single-chip microcomputers are connected with No. two network communication module, for receiving the order of master controller transmission and being fed back; Described No. two network communication module are connected with a network communication module, set up communication with master controller.
Described wireless outer synchronous sound collecting module is made up of infrared transmitter, wireless outer synchronous sound collecting front end and isochronous controller; Wherein, described isochronous controller is connected with wireless outer synchronous sound collecting front end, for described single-chip microcomputers all in control section and synchronous acquisition sound wave; Described infrared transmitter is connected with infrared control circuit, receives the ultrared order of transmitting of section sub-controller transmission and launches infrared signal; Described wireless outer synchronous sound collecting front end and main control computer set up wireless telecommunications by WAP, for transmitting the acoustic signals collected.
Described isochronous controller is made up of photoelectrical coupler, collection front-end driven circuit and infrared circuit; Wherein, described infrared detection circuit is connected with wireless outer synchronous sound collecting front end, for controlling wireless outer synchronous sound collecting front end synchronous acquisition signal; Described photoelectrical coupler is respectively with the control module of section sub-controller with gather front-end driven circuit and be connected; Described collection front-end driven circuit is connected with wireless outer synchronous sound collecting front end with photoelectrical coupler respectively, detect for infrared signal and occur abnormal situation, section sub-controller sends the mode of order by the photoelectrical coupler of wired connection, controls wireless outer synchronous sound collecting front-end collection acoustic signals.
All WAPs set up into a WIFI network.
As shown in Figure 2, system divides section to the complete layout of system embodiment, a point grid is built, and each section 1 is a fundamental measurement unit, comprises a section sub-controller 3, tens measurement points and a WAP 4 in each fundamental measurement unit.Measurement point becomes latticed and is evenly distributed on the two dimensional surface of section, and each measurement point installs a set of wireless outer synchronous sound collecting module 2.
Wireless outer synchronous sound collecting front end in section 1 in all wireless outer synchronous sound collecting modules 2, isochronous controller are connected with the section sub-controller 3 in this section respectively with infrared transmitter;
Section sub-controller 3 is connected with master controller 7;
Master controller 7 is connected with main control computer 8;
Main control computer 8 and moving sound 5 set up wireless connections by WAP 4;
Main control computer 8 sets up wireless connections with the wireless outer synchronous sound collecting front end in wireless outer synchronous sound collecting module 2 by WAP 4.
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 microphone interface and headset output interface; Wherein:
Described digital signal processor is connected with RS-232 communication interface communication converter with flash chip, audio A/D converter, wireless module, static RAM, infrared receiver module 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 microphone 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 a kind of tunnel described in claim 1 sound transmission characteristics detection system;
Simultaneously, be an elementary cell with section, the wireless outer synchronous sound collecting module of installation evenly in net distribution on the two dimensional surface of each section, then in the side of each section, corresponding section sub-controller and WAP are installed, again computing machine, master controller and power supply are installed, finally moving sound is placed in tunnel portal place;
Step 2: main control computer sets up wireless connections with moving sound and wireless outer synchronous sound collecting front end by WAP;
Step 3: after starting working, main control computer exports test acoustic signals, and sends to moving sound order of starting working, and sends sound collecting order to master controller;
Step 4: master controller feeds back to computing machine after receiving sound collecting order, afterwards this command synchronization is sent to the section sub-controller of each section; Moving sound receive mobile sounding in the backward tunnel of order of starting working and simulating vehicle advance in various situations;
Step 5: section sub-controller feeds back to master controller after receiving order, and according to the order that master controller is sent, control each infrared transmitter synchronized transmissions infrared signal in its place section or by the control module synchronized transmission sound collecting order of 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 Multipoint synchronous collection signal;
Step 7: wireless outer synchronous sound collecting front end synchronous averaging, gathers the acoustic signals in tunnel, and is temporarily stored in by the acoustic signals collected in inner storer;
Step 8: the wireless connections of main control computer by setting up with wireless outer synchronous sound collecting front end, reads each and gathers the data of keeping 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, realizes the research to the acoustic propagation characteristic in tunnel;
As shown in Figure 5, system is controlled to start working by main control computer.After beginning, first main control computer sets up wireless connections with wireless outer synchronous sound collecting front end, then main control computer sends sound collecting order to master controller, master controller feeds back to main control computer after receiving order, if main control computer does not receive feedback, again sound collecting order can be sent to master controller; After master controller receives this order, then to each section sub-controller synchronized transmission, can to master controller feedback signal after section sub-controller receives orders, if send unsuccessful, master controller can send this order again to section sub-controller; After section sub-controller receives this order, control all infrared transmitter synchronized transmissions infrared signals in its place section or send sound collecting order by the control module of wired connection, 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 synchronous acquisition voice signal; Wireless outer synchronous sound collecting frontal startup, gathers the acoustic signals in tunnel, is temporarily stored in by the signal collected in inner storer after completing sound collecting; Main control computer, by the wireless telecommunications of setting up with wireless outer synchronous sound collecting front end, reads the acoustic signals that wireless outer synchronous sound collecting module acquires arrives one by one.
As shown in Figure 6, after system starts, each module receives the order of collection signal, just controls mobile sound and starts working.First main control computer sets up wireless connections with moving sound by WAP, and after successful connection, main control computer sends order of starting working to mobile sound, and moving sound starts to send the sound of simulating vehicle process and starts mobile in tunnel.
The present invention adopts the method for point section multimetering, from three dimensions to tunnel not in the same time the sound wave of diverse location gather, overcome the shortcoming that existing measuring equipment sound channel can not meet tunnel multimetering less, system flexibly teaming method also makes system can carry out the establishment of three-dimensional space measurement system flexibly, has stronger practicality.Meanwhile, use the WIFI network set up based on WAP, make installment work avoid the difficulty that multimetering wire cable in tunnel is laid and the problem easily producing interference, more convenient and flexible; Wireless outer synchronous Tunnel Noise acquisition module has data buffering function, can ensure reliability and the validity of noise data transmission when communication jam situation.System also adopts infrared signal generator to realize the synchronous acquisition of multiple Tunnel Noise measurement point, solves wireless WIFI and there is time delay, can not realize the problem of synchronous acquisition function.
Claims (6)
1. multibreak of a tunnel sound transmission characteristics detection system, it is characterized in that, this system comprises: main control computer, master controller, section iversion controller, wireless outer synchronous sound collecting module, WAP and moving sound; Wherein,
Described main control computer, for controlling the overall operation of this system, coordinate with the isochronous controller in master controller, section iversion controller and wireless outer synchronous sound collecting module 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 also receive the data collected, carry out data analysis;
Described master controller, for receiving the sound collecting order sent from main control computer, gives each section iversion controller by netting twine communication synchronized transmission afterwards;
Described section iversion controller, for receiving the sound collecting order that master controller sends, controls all wireless outer synchronous sound collecting module work in its place section;
Described wireless outer synchronous sound collecting module, comprises infrared transmitter, isochronous controller and wireless outer synchronous sound collecting front end three part, the signal synchronous collection on each collection point;
Described WAP, wireless base station used when setting up wireless connections for providing wireless outer synchronous sound collecting front end and main control computer, makes wireless outer synchronous sound collecting module send the acoustic signals collected to main control computer by wireless network; Wireless base station used when setting up wireless connections for providing moving sound and main control computer, makes main control computer send order of starting working to moving sound by wireless telecommunications;
Described moving sound, for the voice signal that the noise frequency that send of simulating vehicle in test process in tunnel is identical with amplitude;
Described main control computer is connected successively with the wireless outer synchronous sound collecting module of the section iversion controller on master controller, cross sections and each collection point;
Described WAP is connected with moving sound with wireless outer synchronous sound collecting module, main control computer respectively.
2. multibreak of a kind of tunnel sound transmission characteristics detection system according to claim 1, it is characterized in that, described master controller is made up 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 a network communication module with serial communication circuit, temperature detector, A/D reference voltage circuit 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 2, it is characterized in that, described section iversion controller is made up of infrared control circuit, No. two single-chip microcomputers, charging circuit, control module and No. two network communication module; Wherein,
Described No. two single-chip microcomputers are connected with No. two network communication module with infrared control circuit, charging circuit, control module respectively;
Described No. two network communication module are connected with a network communication module.
4. multibreak of a kind of tunnel sound transmission characteristics detection system according to claim 1, it is characterized in that, described wireless outer synchronous sound collecting module is made up 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 made up of photoelectrical coupler, collection front-end driven circuit and infrared circuit; Wherein, described collection front-end driven circuit is connected with wireless outer synchronous sound collecting front end with photoelectrical coupler respectively;
Described infrared detection circuit is connected with wireless outer synchronous sound collecting front end.
5. multibreak of a kind of tunnel sound transmission characteristics detection system according to claim 1, it is characterized in that, described all WAPs set up into a WIFI network jointly with the wireless outer synchronous sound collecting front end in wireless outer synchronous sound collecting module, main control computer.
6. multibreak of a tunnel sound transmission characteristics detection method, it is characterized in that, the method comprises the following steps:
Step 1: build multibreak of a kind of tunnel described in claim 1 sound transmission characteristics detection system;
Simultaneously, be an elementary cell with section, the wireless outer synchronous sound collecting module of installation evenly in net distribution on the two dimensional surface of each section, then in the side of each section, corresponding section iversion controller and WAP are installed, again computing machine, master controller and power supply are installed, finally moving sound is placed in tunnel portal place;
Step 2: wireless connections are set up by WAP in main control computer and moving sound and wireless outer synchronous acquisition front end;
Step 3: main control computer exports test acoustic signals, and send to moving sound order of starting working, send sound collecting order to master controller;
Step 4: master controller feeds back to computing machine after receiving sound collecting order, afterwards this command synchronization is sent to the section iversion controller of each section; Moving sound receive mobile sounding in the backward tunnel of order of starting working and simulating vehicle advance in situation;
Step 5: section iversion controller feeds back to master controller after receiving order, and according to the order that master controller is sent, control each infrared transmitter synchronized transmissions infrared signal in its place section or by the control module synchronized transmission sound collecting order of 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 Multipoint synchronous collection signal;
Step 7: wireless outer synchronous sound collecting front end synchronous averaging, gathers the acoustic signals in tunnel, and is temporarily stored in by the acoustic signals collected in inner storer;
Step 8: the wireless connections of main control computer by setting up with wireless outer synchronous sound collecting front end, reads each and gathers the data of keeping 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, the research to the acoustic propagation characteristic in tunnel is just achieved.
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| CN108269470B (en) * | 2018-03-02 | 2024-03-08 | 贺宜琛 | Experimental device and implementation system applied to Doppler effect |
| CN109120816B (en) * | 2018-10-25 | 2021-03-30 | 丰泽智能装备股份有限公司 | Pier-centered intelligent support synchronous data acquisition method and network system |
| 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 |
| 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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| CN201503423U (en) * | 2009-01-23 | 2010-06-09 | 西安西科测控设备有限责任公司 | Device for performing real-time monitoring on dynamic stability of concrete structure |
| CN103309323A (en) * | 2013-06-05 | 2013-09-18 | 广州供电局有限公司 | Method and system for monitoring tunnel environment inspection equipment |
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| CN201503423U (en) * | 2009-01-23 | 2010-06-09 | 西安西科测控设备有限责任公司 | Device for performing real-time monitoring on dynamic stability of concrete structure |
| CN103309323A (en) * | 2013-06-05 | 2013-09-18 | 广州供电局有限公司 | Method and system for monitoring tunnel environment inspection equipment |
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