CN108693249A - A kind of system and method using boulder in front of ultrasonic phased array technology detection shield - Google Patents
A kind of system and method using boulder in front of ultrasonic phased array technology detection shield Download PDFInfo
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- CN108693249A CN108693249A CN201810371876.5A CN201810371876A CN108693249A CN 108693249 A CN108693249 A CN 108693249A CN 201810371876 A CN201810371876 A CN 201810371876A CN 108693249 A CN108693249 A CN 108693249A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0654—Imaging
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Abstract
The invention discloses a kind of system and method using boulder in front of ultrasonic phased array technology detection shield, this system is included in cutter head of shield machine and drills through two hole paths in position up and down, and ultrasonic wave transmitting probe, receiver equipped with piezoelectric chip array are pressed into duct;It is powered to linear battle array piezoelectric chip, and so that linear battle array piezoelectric chip is generated delay effect by setting, fan-shaped beam carries out pre-detection to front soil layer;It is powered to rectangle battle array piezoelectric chip, the receiver of bottom is laid multichannel and is received, and by the signal received by being transported on the processor of shield machine engine room inside, data that processor is stored by pre-detection, which derive, calculates that intensity is big, the position where boulder with high hardness and boulder particle size;The method of the present invention is easy to operate, and short the time required to boulder detection, imaging effect is more preferable, judges that boulder position is more accurate, and detection is at low cost, can effectively solve the deficiency of boulder detection method employed in existing shield construction.
Description
Technical field
The present invention relates to a kind of system and method using boulder in front of ultrasonic phased array technology detection shield, are applied to tunnel
To whether there is detecting and measuring for the position of boulder and boulder away from shield machine in the soil layer of front when road shield driving, belong to ground
Engineering field.
Background technology
China is in rapid economic development stage, metro construction rapid development, and subterranean tunnel excavation mostly uses shield
Structure development machine is constructed.However the boulder of irregular distribution is frequently run onto in shield machine tunneling process, these boulders are mostly
The product of granite differentiation, fine and close hard, occurrence is different, often results in the edge wear of shield machine, cutterhead reduced service life,
If driving when by cutterhead it is stuck or block shield machine pipeline of slagging tap, need shutdown maintenance, seriously affect driving speed.If
It is improper to huge stone handling, it is also easy to cause the engineering accidents such as gush, cave in, causes serious economic loss.Therefore, it is necessary in shield
Position and the particle size of front boulder are detected before structure machine driving, and is fast and effeciently handled, to ensure shield machine
Safely and efficiently construct.
Currently has the method for many boulder detections, such as seismic CT method, resistivity CT methods are imaged using CT methods, in shield
Exploration hole is drilled through in front of structure machine, detecting devices is positioned in exploration hole, closer to detection stratum.Both methods belongs to ground
Across the hole method of table, high resolution, but need repeatedly drilling, trivial operations.In addition to both methods, also gravimetric prospecting, two
The method for tieing up the detection boulder such as fine motion profile method, geological drilling.Wherein, gravimetric prospecting only when boulder it is sufficiently large cause it is larger
It can just be detected when mass excess, the smaller boulder of grain size can not then be detected;And geological drilling is since cost is higher, by field
Ground condition limitation is larger, is generally rarely employed;Two-dimensional micromotion profile method is generally usually used in the location that probing cannot achieve, by place
Condition limitation is smaller, but precision is inadequate in terms of detection boulder position and size.Therefore, it summarizes present in all kinds of methods not
Foot solves the inconvenience that site condition restriction band is come, simplifies operation sequence, reduces construction cost, is current shield machine driving boulder
The problem solved required for detection method research.
In conclusion for the limitation of the above several method, carry out a kind of boulder spy using ultrasonic phased array technology
Survey method, effectively solution site condition, construction is complicated, economic cost is high, determines the not high problem of boulder position size accuracy.
Invention content
It is an object of the invention to be directed to defect existing for existing Detection Techniques, a kind of utilization ultrasonic phase array skill is provided
The system and method that art detects boulder in front of shield, keep the distance of detection boulder more accurate, imaging precision higher, and operate
Simply, detection time is short, and cost is lower.
In order to achieve the above objectives, concrete scheme provided by the invention is:
A kind of system and method using boulder in front of ultrasonic phased array technology detection shield, including stretch into Tunnel ahead soil layer top
The ultrasonic acquisition system inside ultrasonic wave emission system, feeler lever, the nothing inside feeler lever inside the feeler lever of portion and bottom, feeler lever
Line data pick-up and computer, the ultrasonic wave emission system, acquisition system and wireless data sensor device use bolt
It is fixed on inside feeler lever, is connected with cable between ultrasonic acquisition system and wireless data sensor and is fixed on inside feeler lever,
It is contacted by radio-signal transmitter and receiver between wireless sensor and computer;It is described to bore feeler lever at shield machine
Enter soil layer in front of shield, emit ultrasonic wave using ultrasonic phase array ultrasonic wave emission system, ultrasonic wave after boulder at decaying after
Ultrasonic wave after reflection is acquired information by acquisition system, the wireless sensor inside feeler lever is reached, by sensing by ultrasonic wave
Information is reached computer by device;Described used with computer with the detection system is wirelessly connected, and computer is equipped with ultrasound data
Processing system shows front boulder shape size by secondary wave imaging system.
Further, the ultrasonic phase array ultrasonic wave emission system includes infra-red sensor switch, low-tension supply and ultrasound
Phased array piezoelectric chip passes through cable between the low-tension supply and infra-red sensor switch, ultrasonic phased array piezoelectric chip
Circuit is connected;The infra-red sensor switch installs infrared induction device outside power supply, distant by infrared induction
The circuit system in low-tension supply is controlled, excitation ultrasound wave is controlled by infrared induction switch;The ultrasonic phased array piezoelectricity
Cell array is two-dimensional rectangle array, and each piece of piezoelectric chip is all connected with low-tension supply, and low pressure is remotely controlled by infrared switch
The opening and closing sequential of power supply, it can be achieved that linear array and rectangular array conversion.
Further, the back wave harvester is made of reception energy converter, amplifying circuit, comparator, reception energy converter,
It is connected using cable run between amplifying circuit, comparator and wireless data sensor;The amplifying circuit is transported using three-level
Amplifier is calculated, the faint ultrasonic echo signal that energy converter receives can will be received and be converted into electric signal, and by its amplitude
It is enlarged into 600,000 times.Amplified current signal is sent into comparator, and AC signal, which is converted to square-wave signal, is passed to wireless data
Sensor.
Further, treated that electric signal is transmitted by wireless data output transducer for the acquired device of the ultrasonic echo
To terminal, using wireless transmission connection between sensor and terminal, can solve to be inconvenient to connect up in shield machine
Problem, the sensor use the technology kernel of lossless no compression to realize lossless no-delay transmission;The computer is to receiving
Data handled and be imaged, provide front boulder quantity and specific location.
A kind of system and method using boulder in front of ultrasonic phased array technology detection shield are grasped using above system
Make, it is characterised in that concrete operation step is as follows:
Detection system is installed:Ultrasonic phase array sound wave transmitting probe and signal receiving device are installed on shield machine.Ultrasonic wave connects
It receives lane device and processor is positioned in shield machine cabin, anchor support is placed on shield machine used in transmitting probe scene
Side.The energy converter cell array of two-dimensional rectangle battle array, the firing time of each fritter piezoelectric chip are installed on ultrasonic wave transmitting probe
It can individually adjust, to control beam axis and focus parameter;The transmitting probe of ultrasonic phase array need not do any movement can
Wave beam is set to carry out sector scan detection to front soil layer;By the multi-channel time-delay to activating chipset, wave beam is made to generate movement, hair
The sound wave of different angle range is penetrated, comprehensive detection is carried out;In terms of sound wave processor, using band-wise processing device, common
Ultrasonic wave shows that ultrasonic phased array technology is using the method that mechanical scanning and electron scanning are combined come real using simple sound path
Existing image imaging, secondary wave detect imaging pattern, make imaging results resolution ratio higher, more intuitively, accurately show boulder institute
In position and specific particle size;
Sound wave pre-detection is carried out to soil layer in front of shield:Single piezoelectric chip is excited to carry out pre-detection meter to soil layer in front of shield machine
Ultrasonic wave is calculated in information such as the spread speeds of the soil layer.The spread speed of ultrasonic wave is different in different medium, and also
It is related with environment temperature;Because very short to the time needed for the soil sounding of front, influence of the temperature to ultrasonic wave can be ignored, only examine
Consider the influence brought to ultrasonic wave due to soil layer intensity difference;Before carrying out boulder detection, the linear of ultrasonic phase array is first used
Array piezoelectric chip excitation ultrasound wave carries out rough pre-detection to front soil layer, handles collected information of acoustic wave,
Influence relationship of the soil layer to ultrasonic energy and frequency is analyzed, related effective information is extracted and is stored;
Ultrasonic phase array probe detects front soil layer:Soil layer drills in front of shield machine, and acoustic wave transducer is fixed on
In push rod, it is used in combination press-fit equipment to be pressed into acoustic wave transducer in drilled hole with push rod, activates piezoelectric chip, and by prolonging
When so that chip is generated the sound wave of out of phase, fan-shaped beam of sound is generated, by closely to far being swept to soil layer in 10 meters ~ 20 meters of front
Nose into survey;While sound wave emits, opening signal acquisition channel;
Ultrasonic phase array sound wave processor is to the signal processing that is recovered to:Ultrasonic acquisition system acquisition inside feeler lever receives
Underdamp ultrasonic signal and strong ultrasonic attenuation signal and handled;Using multi-channel signal acquiring system, to reduce
Sound wave propagates the decaying of energy and the change of frequency in figure layer, and the side of deconvolution and inverse Q filtering is used in sonicated
Method is to improve resolution ratio;
The present invention compared with prior art, has following obvious prominent substantive distinguishing features and notable technological progress:
A kind of system and method using boulder in front of ultrasonic phased array technology detection shield of the present invention are advanced in front of shield visit
It surveys boulder and provides a kind of effective detection device, it is more time saving quick compared with traditional across hole detection, and can reduce
Detect cost.
A kind of system and method using boulder in front of ultrasonic phased array technology detection shield of the present invention when in use, use
Person can utilize drilling in front of shield that feeler lever is goed deep into front soil layer, easy for construction, investigative range up at 40 meters in front of shield,
Result of detection compares existing two-dimensional micromotion and detects, precision and investigative range satisfaction construction need more accurate with the method for gravity detection
It wants.
A kind of system and method using boulder in front of ultrasonic phased array technology detection shield of the present invention can will collect
Wave signal be converted into electric signal, computer can be wirelessly connected with wireless data sensor, facilitate the installation of equipment, electric signal
It is handled through computer, produces three-dimensional graph, more intuitively see shield machine front geological condition, pacified for shield-tunneling construction
Provide foundation entirely.
A kind of system and method using boulder in front of ultrasonic phased array technology detection shield of the present invention are not by shield tunnel
The influence of buried depth will not increase acquisition cost compared with conventional method because of the increase of edpth of tunnel, not by edpth of tunnel and ground
The influence of the factors such as lower water.
Description of the drawings
Fig. 1 is the system structure diagram that the present invention detects boulder in front of shield using ultrasonic phased array technology
Fig. 2 is ultrasonic phase array detection system feeler lever interior arrangement scheme of installation of the present invention;
Fig. 3 is that piezoelectric chip group makes wave beam generate mobile figure by delay in the present invention;
Fig. 4 is that wave signal is converted to electric signal outflow figure by ultrasonic phase array sound collecting system of the present invention.
Specific implementation mode
Below in conjunction with the accompanying drawings and preferred embodiment, the use of the present invention is further described below.
Embodiment one:
Referring to Fig. 1 ~ Fig. 4, a kind of system using boulder in front of ultrasonic phased array technology detection shield of the present invention includes before stretching into
Ultrasonic wave emission system 2 inside the feeler lever 1 of square tunnel soil layer top and bottom, feeler lever, the ultrasonic acquisition system inside feeler lever
Wireless data sensor 4 inside system 3, feeler lever and computer 7, the ultrasonic wave emission system 2, acquisition system 3 and no line number
It is bolted to inside feeler lever 1 according to 4 equipment of sensor, cable is used between ultrasonic acquisition system and wireless data sensor
It connects and is fixed on inside feeler lever, joined by radio-signal transmitter and receiver between wireless sensor 4 and computer 7
System;It is described that feeler lever 1 is pierced into soil layer in front of shield at shield machine 6, emitted using ultrasonic phase array ultrasonic wave emission system 2 super
Sound wave 8, ultrasonic wave after boulder 5 at decaying after ultrasonic wave 9, the ultrasonic wave after reflection is acquired information by acquisition system 3,
The wireless sensor 4 inside feeler lever is reached, information is reached into computer 7 by sensor;The described and detection system and computer 7
Using wireless connection, computer 7, which is equipped with ultrasound data processing system, is imaged front boulder shape size by secondary wave, is
System shows.
Embodiment two:
The present embodiment and embodiment one are essentially identical, and special feature is as follows:
The ultrasonic phase array ultrasonic wave emission system includes infra-red sensor switch, low-tension supply and ultrasonic phased array
Piezoelectric chip is connected between the low-tension supply and infra-red sensor switch, ultrasonic phased array piezoelectric chip by cable run
It connects;The infra-red sensor switch installs infrared induction device outside power supply, and low tension is remotely controlled by infrared induction
Circuit system in source controls excitation ultrasound wave by infrared induction switch;The ultrasonic phased array piezoelectric chip array
For two-dimensional rectangle array, each piece of piezoelectric chip is all connected with low-tension supply, and opening for low-tension supply is remotely controlled by infrared switch
Close sequential, it can be achieved that linear array and rectangular array conversion.
The back wave harvester is made of reception energy converter, amplifying circuit, comparator, receives energy converter, amplification electricity
It is connected using cable run between road, comparator and wireless data sensor;The amplifying circuit is amplified using three-stage operational
Device can will receive the faint ultrasonic echo signal that energy converter receives and be converted into electric signal, and its amplitude is enlarged into
600000 times.Amplified current signal is sent into comparator, and AC signal, which is converted to square-wave signal, is passed to wireless data sensor.
Treated that electric signal is transmitted to calculating by wireless data output transducer for the acquired device of ultrasonic echo
Machine terminal can solve the problems, such as to be inconvenient to connect up in shield machine using wireless transmission connection between sensor and terminal, should
Sensor uses the technology kernel of lossless no compression to realize lossless no-delay transmission;The computer to the data that receive into
Row is handled and is imaged, and provides the quantity and specific location of front boulder.
Embodiment three:
The present embodiment is operated using the method for boulder in front of ultrasonic phased array technology detection shield using above system,
It is characterized in that:
Detection system is installed:Ultrasonic phase array sound wave transmitting probe and signal receiving device are installed on shield machine.Ultrasonic wave connects
It receives lane device and processor is positioned in shield machine cabin, anchor support is placed on shield machine used in transmitting probe scene
Side.The energy converter cell array of two-dimensional rectangle battle array, the firing time of each fritter piezoelectric chip are installed on ultrasonic wave transmitting probe
It can individually adjust, to control beam axis and focus parameter;The transmitting probe of ultrasonic phase array need not do any movement can
Wave beam is set to carry out sector scan detection to front soil layer;By the multi-channel time-delay to activating chipset, wave beam is made to generate movement, hair
The sound wave of different angle range is penetrated, comprehensive detection is carried out;In terms of sound wave processor, using band-wise processing device, common
Ultrasonic wave shows that ultrasonic phased array technology is using the method that mechanical scanning and electron scanning are combined come real using simple sound path
Existing image imaging, secondary wave detect imaging pattern, make imaging results resolution ratio higher, more intuitively, accurately show boulder institute
In position and specific particle size;
Sound wave pre-detection is carried out to soil layer in front of shield:Single piezoelectric chip is excited to carry out pre-detection meter to soil layer in front of shield machine
Ultrasonic wave is calculated in information such as the spread speeds of the soil layer.The spread speed of ultrasonic wave is different in different medium, and also
It is related with environment temperature;Because very short to the time needed for the soil sounding of front, influence of the temperature to ultrasonic wave can be ignored, only examine
Consider the influence brought to ultrasonic wave due to soil layer intensity difference;Before carrying out boulder detection, the linear of ultrasonic phase array is first used
Array piezoelectric chip excitation ultrasound wave carries out rough pre-detection to front soil layer, handles collected information of acoustic wave,
Influence relationship of the soil layer to ultrasonic energy and frequency is analyzed, related effective information is extracted and is stored;
Ultrasonic phase array probe detects front soil layer:Soil layer drills in front of shield machine, and acoustic wave transducer is fixed on
In push rod, it is used in combination press-fit equipment to be pressed into acoustic wave transducer in drilled hole with push rod, activates piezoelectric chip, and by prolonging
When so that chip is generated the sound wave of out of phase, fan-shaped beam of sound is generated, by closely to far being swept to soil layer in 10 meters ~ 20 meters of front
Nose into survey;While sound wave emits, opening signal acquisition channel;
Ultrasonic phase array sound wave processor is to the signal processing that is recovered to:Ultrasonic acquisition system acquisition inside feeler lever receives
Underdamp ultrasonic signal and strong ultrasonic attenuation signal and handled;Using multi-channel signal acquiring system, to reduce
Sound wave propagates the decaying of energy and the change of frequency in figure layer, and the side of deconvolution and inverse Q filtering is used in sonicated
Method is to improve resolution ratio;
Example IV:
As shown in Figure 1 and Figure 2, a kind of system and method using boulder in front of ultrasonic phased array technology detection shield, including stretch into
Ultrasonic wave emission system 2 inside the feeler lever 1 of Tunnel ahead soil layer top and bottom, feeler lever, the ultrasonic acquisition inside feeler lever
Wireless data sensor 4 inside system 3, feeler lever, shield machine 6, computer 7, transmitting ultrasonic wave 8, declines at boulder 5 in front of shield
Ultrasonic wave 9, ultrasonic collecting device after subtracting are collected into back wave 10, secondary counter ejected wave 11, before the feeler lever 1 gos deep into shield machine
The top and bottom of necromancer layer, ultrasonic transmission device 2 emits ultrasonic wave 8 and is scanned to soil layer, if detecting boulder, generates
Ultrasonic wave 9 after decaying, ultrasonic collecting device, which is collected into back wave 10 and secondary counter ejected wave 11 and is converted to electric signal, to be passed through
Sensor transmissions;The ultrasonic phase array ultrasonic wave emission system includes infra-red sensor switch 12, low-tension supply 13, ultrasonic phase
Array piezoelectric chip 14 is controlled, the ultrasonic acquisition system 3 is connected with wireless data sensor 4 by data transmission channel, should
Transmission channel is made of several data transmission fibers, realizes lossless no-delay transmission;The ultrasonic acquisition system 3 and low tension
Source 13 is connected using conducting wire, and operating power source is provided for ultrasonic collecting device 3;The low-tension supply 13 and infra-red sensor switch
12 and ultrasonic phase array piezoelectric chip 14 by complicated connection, the delay of piezoelectric chip is supplied with controlling electric power main circuit
Energy.
As shown in figure 3, by taking one row's piezoelectric chip of ultrasonic phase array as an example, in power supply to the delays time to control of each piezoelectric chip
Under, the ultrasonic wave sector corrugated emitted generates movement from left to right, to carry out comprehensive scanning to soil layer in front of shield.
It is spread out of as shown in figure 4, waveform signal is converted to electric signal by ultrasonic acquisition system.
Single boulder present in soil layer in front of shield machine is detected and obtains its specific location and size cases.Dress
It sets using as follows:By drilling machine to drilling respectively at the top and bottom of soil layer in front of shield machine, and feeler lever 1 is stretched into drilling,
Pass through the circuit inside the low-tension supply excitation power source in infra-red remote control ultrasonic transmission device 2, piezo crystals in shield machine
The excitation of piece 14 generates ultrasonic wave 8, and Coarse Acquisition is carried out to soil layer in front of shield, is calculated according to the time difference that ultrasonic reflections are returned
Go out spread speed of the ultrasonic wave under the soil layer and the environment temperature.It is opened again by the delay inside infrared induction excitation power source
14 linear array of dynamic piezoelectric chip generates fan-shaped mobile ultrasonic wave, the flat scanning moved up and down to soil layer in front of shield.
Reflection sound wave is acquired, and it is the ultrasonic wave 9 after decaying to tell which sound wave, analog ultrasonic wave emits X-Y scheme, such as Fig. 1 institutes
Show, obtains decaying wave 9, do not decay(Decaying is weaker)Ultrasonic wave 8, received respectively by the sound collecting system 3 in upper and lower feeler lever
To the four beam waves near decaying wave be crossed to form an external quadrangle for including boulder, further according to sound wave emit and recycle
Time difference, start piezoelectric patches linear array carry out plane scanning, obtain two dimensional model figure, restart piezoelectric patches rectangular array into
Row three-dimensional scanning obtains the three-dimensional simulation figure to boulder group, calculates boulder group shape of size and boulder group at a distance from shield machine
Shape size.
Claims (5)
1. a kind of system using boulder in front of ultrasonic phased array technology detection shield, it is characterised in that:Including stretching into front tunnel
The feeler lever at road soil layer top and bottom(1), ultrasonic wave emission system inside feeler lever(2), ultrasonic acquisition system inside feeler lever
System(3), wireless data sensor inside feeler lever(4)And computer(7), the ultrasonic wave emission system(2), acquisition system
(3)With wireless data sensor(4)Equipment is bolted to feeler lever(1)Inside, ultrasonic acquisition system and wireless data
It is connected and is fixed on inside feeler lever with cable between sensor, wireless sensor(4)With computer(7)Between pass through aerogram
Number transmitter is contacted with receiver;It is described in shield machine(6)Place is by feeler lever(1)Soil layer in front of shield is pierced, ultrasound phase-control is utilized
Battle array ultrasonic wave emission system(2)Emit ultrasonic wave(8), ultrasonic wave is through boulder(5)Afterwards at ultrasonic wave after decaying(9), it is by acquisition
System(3)Ultrasonic wave after reflection is acquired information, reaches the wireless sensor inside feeler lever(4), by sensor by information
Reach computer(7);Described and the detection system and computer(7)Using wireless connection, computer(7)Equipped with ultrasound data
Processing system shows front boulder shape size by secondary wave imaging system.
2. the system according to claim 1 using boulder in front of ultrasonic phased array technology detection shield, it is characterised in that:
The ultrasonic phase array ultrasonic wave emission system(2)Including infra-red sensor switch(12), low-tension supply(13)And ultrasound phase-control
Array piezoelectric chip(14), the low-tension supply(13)With infra-red sensor switch(12), ultrasonic phased array piezoelectric chip
(14)Between be connected by cable run;The infra-red sensor switch(12)Infrared induction dress is installed i.e. outside power supply
It sets, low-tension supply is remotely controlled by infrared induction(13)Interior circuit system controls excitation ultrasound wave by infrared induction switch;
The ultrasonic phased array piezoelectric chip(14)Array be two-dimensional rectangle array, each piece of piezoelectric chip all with low-tension supply
(13)It is connected, passes through infrared switch(12)The opening and closing sequential of low-tension supply is remotely controlled, it can be achieved that linear array and rectangular array
Conversion.
3. the system according to claim 1 using boulder in front of ultrasonic phased array technology detection shield, it is characterised in that:
The back wave harvester(3)By reception energy converter(15), amplifying circuit(16), comparator(17)Composition receives energy converter
(15), amplifying circuit(16), comparator(17)With wireless data sensor(4)Between be connected using cable run;It is described to put
Big circuit(16)Using three-stage operational amplifier, energy converter can will be received(15)The faint ultrasonic echo signal received turns
Electric signal is turned to, and its amplitude is enlarged into 600,000 times.Amplified current signal is sent into comparator(17), by AC signal
It is converted to square-wave signal and is passed to wireless data sensor(4).
4. the system according to claim 3 using boulder in front of ultrasonic phased array technology detection shield, it is characterised in that:
The acquired device of ultrasonic echo(3)Treated electric signal is by wireless data output transducer(4)It is transmitted to computer
(7)Terminal, sensor(4)With computer(7)Terminal room is connected using wireless transmission, can solve to be inconvenient to connect up in shield machine
Problem, the sensor use the technology kernel of lossless no compression to realize lossless no-delay transmission;The computer(7)To receiving
To data handled and be imaged, provide the quantity and specific location of front boulder.
5. a method of using boulder in front of ultrasonic phased array technology detection shield, using profit according to claim 1
It is operated with the system of boulder in front of ultrasonic phased array technology detection shield, it is characterised in that concrete operation step is as follows:
(1)Detection system is installed:Ultrasonic phase array sound wave transmitting probe and signal receiving device are installed on shield machine.Ultrasonic wave
Receiving channel device and processor are positioned in shield machine cabin, and anchor support is placed on shield machine used in transmitting probe scene
Side.The energy converter cell array of two-dimensional rectangle battle array, the firing time of each fritter piezoelectric chip are installed on ultrasonic wave transmitting probe
It can individually adjust, to control beam axis and focus parameter;The transmitting probe of ultrasonic phase array need not do any movement can
Wave beam is set to carry out sector scan detection to front soil layer;By the multi-channel time-delay to activating chipset, wave beam is made to generate movement, hair
The sound wave of different angle range is penetrated, comprehensive detection is carried out;In terms of sound wave processor, using band-wise processing device, common
Ultrasonic wave shows that ultrasonic phased array technology is using the method that mechanical scanning and electron scanning are combined come real using simple sound path
Existing image imaging, secondary wave detect imaging pattern, make imaging results resolution ratio higher, more intuitively, accurately show boulder institute
In position and specific particle size;
(2)Sound wave pre-detection is carried out to soil layer in front of shield:Single piezoelectric chip is excited to carry out sondage to soil layer in front of shield machine
Survey calculates ultrasonic wave in information such as the spread speeds of the soil layer.The spread speed of ultrasonic wave is different in different medium,
And it is also related with environment temperature;Because very short to the time needed for the soil sounding of front, influence of the temperature to ultrasonic wave can be ignored,
Only consider the influence brought to ultrasonic wave due to soil layer intensity difference;Before carrying out boulder detection, ultrasonic phase array is first used
Linear array piezoelectric chip excitation ultrasound wave carries out rough pre-detection to front soil layer, at collected information of acoustic wave
Reason, analysis soil layer extract related effective information and store to the influence relationship of ultrasonic energy and frequency;
(3)Ultrasonic phase array probe detects front soil layer:Soil layer drills in front of shield machine, and acoustic wave transducer is fixed
In push rod, it is used in combination press-fit equipment to be pressed into acoustic wave transducer in drilled hole with push rod, activates piezoelectric chip, and pass through
Delay makes chip generate the sound wave of out of phase, generates fan-shaped beam of sound, by closely to far being carried out to soil layer in 10 meters ~ 20 meters of front
Scanning detects;While sound wave emits, opening signal acquisition channel;
(4)Ultrasonic phase array sound wave processor is to the signal processing that is recovered to:Ultrasonic acquisition system acquisition inside feeler lever connects
The underdamp ultrasonic signal and strong ultrasonic attenuation signal that receive simultaneously are handled;Using multi-channel signal acquiring system, it is
It reduces sound wave and propagates the decaying of energy and the change of frequency in figure layer, deconvolution and inverse Q filtering are used in sonicated
Method to improve resolution ratio.
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| CN110469334A (en) * | 2019-09-06 | 2019-11-19 | 广西大学 | A kind of blasting system for metro shield boulder and prominent rock blasting |
| CN110988980A (en) * | 2019-12-23 | 2020-04-10 | 山东大学 | Phased array sound wave advanced geological detection system and method carried by shield tunneling machine |
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| CN113960653A (en) * | 2021-09-17 | 2022-01-21 | 山东大学 | Phased array sound wave advanced detection instrument and advanced geological prediction method |
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