CN106855492A - Mine Dust Concentration dynamic detection system and Dust Concentration dynamic monitoring method - Google Patents
Mine Dust Concentration dynamic detection system and Dust Concentration dynamic monitoring method Download PDFInfo
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- CN106855492A CN106855492A CN201611093694.3A CN201611093694A CN106855492A CN 106855492 A CN106855492 A CN 106855492A CN 201611093694 A CN201611093694 A CN 201611093694A CN 106855492 A CN106855492 A CN 106855492A
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- ultrasonic
- dust concentration
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- ultrasonic wave
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N2015/0096—Investigating consistence of powders, dustability, dustiness
Abstract
The invention discloses a kind of mine Dust Concentration dynamic detection system and Dust Concentration dynamic monitoring method based on ultrasonic wave, 16 ultrasonic sensors are angularly fixed on the inwall of inner ring, and each ultrasonic sensor has transmitting ultrasonic wave and receives the function of ultrasonic wave simultaneously；All holding wires are commonly connected to be fixed on the multi-pin connector on outer shroud, multi-pin connector is connected by shielded multiconductor cable with a program control multi-channel switch, program control multi-channel switch respectively with voltage impulse generator, ultrasonic data acquisition device connection, voltage impulse generator and ultrasonic data acquisition device connection, ultrasonic data acquisition device and data processing centre's connection.Current single-shot list is received into detection mode to be improved to receive CT detection patterns circulation single-shot more, is distributed using two kinds of images reflection Dust Concentrations of ultrasonic velocity CT and absorption coefficient CT, improve the accuracy of its detection.
Description
Technical field
The present invention relates to ultrasonic detection instrument, more particularly to a kind of mine Dust Concentration dynamic detection based on ultrasonic wave
System and Dust Concentration dynamic monitoring method.
Background technology
Coal mine down-hole tunnel is tunneled will produce substantial amounts of coal dust with during working face mining, particularly in Gas Outburst mistake
The a large amount of coal dusts produced in journey can cause dust explosion accident reaching certain condition, therefore accurate the real time measure shaft production is empty
Between Dust Concentration to preventing and treating dust explosion accident have great importance.
When the gas that dust or coal dust is distributed with is penetrated, its ultrasonic velocity and the sound intensity can produce larger change to ultrasonic wave
Change.The change of ultrasonic velocity is due to when the presence of Mei Chen Cakes in gas makes ultrasonic wave penetrate path length with without coal dust
Straight path length is different and cause；The change of the ultrasonic wave sound intensity is due to the Cakes suction to ultrasonic energy of coal dirt in gas
Receive what decay was caused.Ultrasonic velocity and the sound intensity can be obtained with the relation of Dust Concentration by the method for laboratory or field calibration
.
Coal dust is extremely uneven in the distribution of the underground space, and is dynamic change.Current various dust and coal dust
Concentration detection apparatus are mainly the mean intensity value of a certain regional extent.Existing ultrasonic wave dust detector is received using single-shot list
Working method, its testing result is the mean intensity value of single ray path, often results in measured concentration value actual less than local
Concentration value, it is impossible to the requirement of accurate detection Dust Concentration spatial distribution in real time is met, when causing regional area Dust Concentration to transfinite
And the phenomenon that can not accurately and timely forecast.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, dense it is an object of the invention to provide a kind of mine coal dust based on ultrasonic wave
Degree dynamic detection system and Dust Concentration dynamic monitoring method, image reconstruction is met by way of being received circulating ultrasonic single-shot more
Detection mode, solve the problems, such as space of mine Dust Concentration distribution real-time detection.
In order to solve the above technical problems, the present invention program includes：
A kind of mine Dust Concentration dynamic detection system based on ultrasonic wave, it includes that Dust Concentration detects cylindrical cavity
Body, wherein, Dust Concentration detection circular cylindrical cavity is made up of inner ring and outer rings, and 16 ultrasonic sensors are angularly fixed
In the inwall of inner ring, each ultrasonic sensor has transmitting ultrasonic wave and receives the function of ultrasonic wave simultaneously；The outer wall of inner ring
On be evenly arranged multiple mounting grooves, the holding wire of ultrasonic sensor is laid in correspondence mounting groove, and all holding wires are common
It is connected on the multi-pin connector being fixed on outer shroud, multi-pin connector passes through shielded multiconductor cable and a program control multi-channel switch phase
Connection, program control multi-channel switch respectively with voltage impulse generator, ultrasonic data acquisition device connection, voltage pulse
Generator and ultrasonic data acquisition device connection, ultrasonic data acquisition device and data processing centre's connection.
Described mine Dust Concentration dynamic detection system, wherein, above-mentioned ultrasonic data acquisition device is gathered including A/D
Plate, charge amplifier, an I/O interfaces, the 2nd I/O interfaces and the 3rd I/O interfaces, A/D collection plates by the 3rd I/O interfaces with
Data processing centre's connection, charge amplifier is amplified by the 2nd I/O interfaces and data processing centre's connection, electric charge
Device and A/D collection plate connections, charge amplifier pass through with program control multi-channel switch connection, voltage impulse generator
Synchronous circuit and A/D collection plate connections, voltage impulse generator is by an I/O interfaces and circuit company of data processing centre
Connect.
Described mine Dust Concentration dynamic detection system, wherein, above-mentioned data processing centre is computer.
A kind of Dust Concentration dynamic monitoring method using the mine Dust Concentration dynamic detection system, it includes following
Step：
A, program control multi-channel switch control a ultrasonic sensor to be in emission state, control and the supersonic sensing
Device radiating surface normal is received with transmitting and is in reception state to other seven ultrasonic sensor of the angle less than 45 ° of line；
Formation meets CT image reconstructions after each ultrasonic sensor in 16 ultrasonic sensors travels through an emission state
Detection pattern；
The high-voltage pulse signal that B, voltage impulse generator are produced is input to correspondence ultrasound by program control multi-channel switch
Wave sensor produces ultrasonic wave analog signal, and corresponding other seven of ultrasonic sensor corresponding with this is in the super of reception state
The ultrasonic wave analog signal that sonic sensor is received is input to ultrasonic data acquisition device by program control multi-channel switch,
Data signal, ultrasonic data acquisition are formed after electric charge amplification, decay, A/D conversions are carried out in ultrasonic data acquisition device
Device goes out to data processing centre the digital data transmission carries out data processing.
Described Dust Concentration dynamic monitoring method, wherein, above-mentioned steps B specifically also includes：
Above-mentioned data processing centre is interval according to the initial value threshold value and analysis time window of setting, at the beginning of automatic identification ultrasonic wave
To time tiAnd peak-peak, Traveltime data file and amplitude data file are formed, then coal dust is obtained by CT image reconstruction algorithms
The VELOCITY DISTRIBUTION of coal dust and absorption coefficient are distributed in Concentration Testing cylindrical cavity body region, finally according to Dust Concentration and ultrasonic wave
The calibration result of speed and absorption coefficient is converted to Dust Concentration distributed image.
A kind of the mine Dust Concentration dynamic detection system and Dust Concentration based on ultrasonic wave that the present invention is provided dynamically are supervised
Survey method, receives current single-shot list detection mode and is improved to receive CT detection patterns circulation single-shot more, using ultrasonic velocity CT
With two kinds of image reflection Dust Concentration distributions of absorption coefficient CT, the accuracy of its detection is improve, by ultrasonic signal
Spectrum analysis, obtains the signal peak of different frequency, can be with to the selectional feature of ultrasonic frequency using different-grain diameter coal dust
The spatial distribution of different-grain diameter coal dust is detected, more accurately Dust Concentration distributed image is obtained, is greatly entering for prior art
Step.
Brief description of the drawings
Fig. 1 is the structural representation of mine Dust Concentration dynamic detection system in the present invention.
Specific embodiment
Dynamically supervised the invention provides a kind of mine Dust Concentration dynamic detection system based on ultrasonic wave and Dust Concentration
Survey method, to make the purpose of the present invention, technical scheme and effect clearer, clear and definite, below to the present invention further specifically
It is bright.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The invention provides a kind of mine Dust Concentration dynamic detection system based on ultrasonic wave, it includes that Dust Concentration is examined
Circular cylindrical cavity 10 is surveyed, as shown in Figure 1, Dust Concentration detection circular cylindrical cavity 10 is made up of inner ring 1 and outer shroud 2,16
Individual ultrasonic sensor 3 is angularly fixed on the inwall of inner ring, and each ultrasonic sensor 3 has transmitting ultrasonic wave and connects simultaneously
Receive the function of ultrasonic wave；Multiple mounting grooves 11 are evenly arranged on the outer wall of inner ring 1, the holding wire 12 of ultrasonic sensor 3 is applied
In correspondence mounting groove 11, all holding wires 12 are commonly connected on the multi-pin connector 4 that is fixed on outer shroud 2, multi-pin connector 4
Be connected with a program control multi-channel switch 6 by shielded multiconductor cable 5, program control multi-channel switch 6 respectively with voltage pulse
Generator 7, the connection of ultrasonic data acquisition device 8, voltage impulse generator 7 and the circuit of ultrasonic data acquisition device 8
Connection, ultrasonic data acquisition device 8 and the connection of data processing centre 9.
In another preferred embodiment of the invention, above-mentioned ultrasonic data acquisition device 8 includes A/D collection plates 13, electricity
Lotus amplifier 14, an I/O interfaces 15, the 2nd I/O interfaces 16 and the 3rd I/O interfaces 17, A/D collection plates 13 pass through the 3rd I/O
Interface 17 and the connection of data processing centre 9, charge amplifier 14 is by the 2nd I/O interfaces 16 and the line of data processing centre 8
Road connection, charge amplifier 14 and the connection of A/D collection plates 13, charge amplifier 14 and the circuit of program control multi-channel switch 6
Connection, voltage impulse generator 7 passes through first by synchronous circuit and the connection of A/D collection plates 13, voltage impulse generator 7
I/O interfaces 15 and the connection of data processing centre 9.And above-mentioned data processing centre 9 is that computer, industry calculating etc. set
It is standby.
Present invention also offers a kind of Dust Concentration dynamic monitoring using the mine Dust Concentration dynamic detection system
Method, it is comprised the following steps：
Step one, program control multi-channel switch 6 controls a ultrasonic sensor 3 to be in emission state, and control surpasses with this
The radiating surface normal of sonic sensor 3 receives with transmitting and other seven ultrasonic sensor of the angle less than 45 ° of line is in
Reception state；Each ultrasonic sensor 3 in 16 ultrasonic sensors 3 forms satisfaction after traveling through an emission state
The detection pattern of CT image reconstructions；
Step 2, it is right that the high-voltage pulse signal that voltage impulse generator 7 is produced is input to by program control multi-channel switch 6
Ultrasonic sensor 3 is answered to produce ultrasonic wave analog signal, corresponding other seven of ultrasonic sensor 3 corresponding with this is in reception
The ultrasonic wave analog signal that the ultrasonic sensor of state is received is input to ultrasound data by program control multi-channel switch 6
Harvester 8, forms data signal, ultrasound after electric charge amplification, decay, A/D conversions are carried out in ultrasonic data acquisition device 8
Ripple data acquisition device 8 goes out to data processing centre 9 digital data transmission carries out data processing.
Further, above-mentioned steps two specifically also include：
Above-mentioned data processing centre 9 is interval according to the initial value threshold value and analysis time window of setting, automatic identification ultrasonic wave
First arrival time ti and peak-peak, form Traveltime data file and amplitude data file, then obtain coal by CT image reconstruction algorithms
The VELOCITY DISTRIBUTION of coal dust and absorption coefficient distribution in dust concentration detection circular cylindrical cavity 10 region, finally according to Dust Concentration with it is super
The calibration result of SVEL and absorption coefficient is converted into obtaining Dust Concentration distributed image.
In order to the present invention is further described, it is exemplified below more detailed embodiment and illustrates.Setting, test chamber
Diameter according to actual needs can in the range of 200-1000mm flexible design, if test chamber maximum detecting distance be 1m, ultrasound
Ripple first-arrival traveltime is about 3ms；If sensor emission frequency is 500KHz, voltage pulse signal generator is set by cycle T=3.5ms
Meter fully meets the requirement to gathering signal, and 400ms is about the time required to so completing one-time detection, that is, realize Dust Concentration
Dynamic detection realize again Dust Concentration spatial distribution detection.It is specific as follows：
16 ultrasonic sensors 3 of data processing centre 9 pair carry out hexadecimal sequential encoding (0#-F#), right respectively
The channel number of Ying Shiliu distance controls multi-channel switch 6；
Data processing centre 9 controls 0# ultrasonic sensors for emission sensor first, with program control multi-channel switch 6
0# passages connect voltage impulse generator 7；Seven high-voltage pulse signals are produced by cycle T, it is defeated by program control multi-channel switch 6
Enter to 0# ultrasonic sensors and produce seven ultrasonic signals, the cycle is T；Seven corresponding with 0# ultrasonic sensors are in
The ultrasonic sensor numbering of reception state is respectively 5#-B#；1st cycle is received by 5# sensors, and the 2nd cycle is passed by 6#
Sensor is received ... ..., and the 7th cycle is received by B# sensors；Receive rear data processing centre 9 and control 1# ultrasonic waves again
Sensor is emission sensor, and the ultrasonic sensor sensor in reception state correspondingly is 6#-C#, with such
Push away, to F# sensor emissions are caused, corresponding 4#-A# is received, and completes once complete data acquisition；
The ultrasonic wave analog signal that all ultrasonic sensors 3 are received is input to super by program control multi-channel switch 6
Sonic data harvester 8, data signal is converted into through electric charge amplification, decay, A/D, is input to data processing centre 9 and is entered line number
According to treatment；Data processing centre 9 is interval according to the initial value threshold value and analysis time window of setting, during automatic identification ultrasonic wave first arrival
Between ti and peak-peak, formed CT imaging formats Traveltime data file and amplitude data file, directly invoke CT treatment software
Real time imagery, finally gives the Dust Concentration distribution results inside Dust Concentration detection circular cylindrical cavity 10, finally according to coal dust
Concentration is converted into obtaining Dust Concentration distributed image with the calibration result of ultrasonic velocity and absorption coefficient.
Certainly, described above is only presently preferred embodiments of the present invention, and the present invention is not limited to enumerate above-described embodiment, should
When explanation, any those of ordinary skill in the art are all equivalent substitutes for being made, bright under the teaching of this specification
Aobvious variant, all falls within the essential scope of this specification, ought to be subject to protection of the invention.
Claims (5)
1. a kind of mine Dust Concentration dynamic detection system based on ultrasonic wave, it includes that Dust Concentration detects circular cylindrical cavity,
Characterized in that, Dust Concentration detection circular cylindrical cavity is made up of inner ring and outer rings, 16 ultrasonic sensors are angularly
The inwall of inner ring is fixed on, each ultrasonic sensor has transmitting ultrasonic wave and receives the function of ultrasonic wave simultaneously；Inner ring
Multiple mounting grooves are evenly arranged on outer wall, the holding wire of ultrasonic sensor is laid in correspondence mounting groove, all holding wires
It is commonly connected to be fixed on the multi-pin connector on outer shroud, multi-pin connector is opened by shielded multiconductor cable with a program control multy-way switching
Pass is connected, program control multi-channel switch respectively with voltage impulse generator, ultrasonic data acquisition device connection, voltage
Impulse generator and ultrasonic data acquisition device connection, ultrasonic data acquisition device and circuit company of data processing centre
Connect.
2. mine Dust Concentration dynamic detection system according to claim 1, it is characterised in that above-mentioned ultrasound data is adopted
Acquisition means include A/D collection plates, charge amplifier, an I/O interfaces, the 2nd I/O interfaces and the 3rd I/O interfaces, A/D collection plates
By the 3rd I/O interfaces and data processing centre's connection, charge amplifier passes through the 2nd I/O interfaces and data processing centre
Connection, charge amplifier and A/D collection plate connections, charge amplifier and program control multi-channel switch connection,
Voltage impulse generator by synchronous circuit and A/D collection plate connections, voltage impulse generator by an I/O interfaces with
Data processing centre's connection.
3. mine Dust Concentration dynamic detection system according to claim 1, it is characterised in that above-mentioned data processing centre
It is computer.
4. a kind of Dust Concentration dynamic monitoring method using mine Dust Concentration dynamic detection system as claimed in claim 1,
It is comprised the following steps：
A, program control multi-channel switch control a ultrasonic sensor to be in emission state, control and the ultrasonic sensor spoke
Penetrate face normal and receive other seven ultrasonic sensors that 45 ° are less than to the angle of line in reception state with transmitting；16
Each ultrasonic sensor in individual ultrasonic sensor forms the inspection for meeting CT image reconstructions after traveling through an emission state
Survey pattern；
The high-voltage pulse signal that B, voltage impulse generator are produced is input to correspondence ultrasonic wave and passes by program control multi-channel switch
Sensor produces ultrasonic wave analog signal, corresponding other seven ultrasonic waves for being in reception state of corresponding with this ultrasonic sensor
The ultrasonic wave analog signal that sensor is received is input to ultrasonic data acquisition device by program control multi-channel switch, super
Data signal, ultrasonic data acquisition device are formed after electric charge amplification, decay, A/D conversions are carried out in sonic data harvester
The digital data transmission is gone out to data processing centre carries out data processing.
5. Dust Concentration dynamic monitoring method according to claim 4, it is characterised in that above-mentioned steps B is specifically also wrapped
Include：
Above-mentioned data processing centre is interval according to the initial value threshold value and analysis time window of setting, during automatic identification ultrasonic wave first arrival
Between tiAnd peak-peak, Traveltime data file and amplitude data file are formed, then Dust Concentration is obtained by CT image reconstruction algorithms
The VELOCITY DISTRIBUTION of coal dust and absorption coefficient distribution in detection cylindrical cavity body region, finally according to Dust Concentration and ultrasonic velocity
Dust Concentration distributed image is converted to the calibration result of absorption coefficient.
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| CN201611093694.3A CN106855492B (en) | 2016-12-02 | 2016-12-02 | Mine Dust Concentration dynamic detection system and Dust Concentration dynamic monitoring method |
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