CN102520069A - Coded signal detector and method for detecting stress wave generation and corrugated pipe grouting quality - Google Patents
Coded signal detector and method for detecting stress wave generation and corrugated pipe grouting quality Download PDFInfo
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Abstract
The invention discloses a coded signal detector and a method for detecting stress wave generation and corrugated pipe grouting quality. The coded signal detector comprises a handheld terminal, an emission probe and a stress wave sensor, a signal output end of the handheld terminal is connected with the emission probe, and a signal input end of the handheld terminal is connected with the stress wave sensor. By using the coded signal detector and the method for detecting stress wave generation and corrugated pipe grouting quality, various factors affecting construction quality such as the corrugated pipe grouting quality, pile foundation quality, anchoring quality of an anchor rod, karst at the bottom of a pile foundation and the like can be simultaneously detected, the difference of focus energy can be fully considered, and a focus can be quantitatively controlled, so that detection precision is further improved.
Description
Technical field
The invention belongs to construction quality detection technique field, be specifically related to a kind of coded signal detector and stress wave and produce and corrugated tube grouting quality detection method.
Background technology
In recent years, the develop rapidly along with highway in China is built in the highway construction in special areas such as Duo Shan, Duo Gu, many rivers, can relate to science of bridge building, Tunnel Engineering and high slope engineering usually.Wherein, for science of bridge building, the principal element that influences the science of bridge building quality comprises: corrugated tube grouting quality, concrete pouring quality, the pier stud quality that supports bridge and buried underground foundation pile construction quality etc.For Tunnel Engineering and high slope engineering; Because in current Tunnel Engineering and high slope engineering; Usually can use anchor pole, anchor cable to carry out active and reinforce, therefore, the principal element that influences Tunnel Engineering and high slope construction quality comprises: bolt grouting quality, anchor pole and anchor cable length etc.
Therefore, for guaranteeing the construction quality of science of bridge building, Tunnel Engineering and high slope engineering, need, engineering delivery effectively detect the quality of above-mentioned various influence factors before using.
The above-mentioned various influence factor method for quality of existing detection are mainly the stress wave detection method.And; In the existing prospection stress wave detection method, focus is generally that artificial mode through the hammering testee produces, and this focus producing method is owing to be artificial the generation; So the size of seismic source energy is difficult to accurate control; And when focus is analyzed, also can't carry out quantitative test, thereby influenced the precision that above-mentioned various influence factors are detected to seismic source energy and frequency spectrum follow-up.
Summary of the invention
Defective to the prior art existence; The present invention provides a kind of coded signal detector and stress wave to produce and corrugated tube grouting quality detection method; Through using this detector, not only can detect various factors that influence construction quality such as corrugated tube grouting quality, pile foundation quality, anchor rod anchored quality and the karst detections of pile foundation bottom simultaneously, and can take into full account the difference of seismic source energy; Can quantitatively control focus, thereby further improve the precision that detects.
The technical scheme that the present invention adopted is following:
The present invention provides a kind of coded signal detector, comprising: handheld terminal, transmitting probe and shockwave sensor; The signal output part of said handheld terminal is connected with said transmitting probe, and the signal input part of said handheld terminal is connected with said shockwave sensor.
Preferably, said handheld terminal comprises: be used to produce and the central processing unit of object corresponding codes signal to be measured, the acquisition module that is connected with said central processing unit.
Preferably, said acquisition module comprises: D/A module, A/D module and signal condition amplifying circuit; The signal input part of said D/A module is connected with the signal output part of said central processing unit, and the signal output part of said D/A module is connected with the input end of said signal condition amplifying circuit; The signal input part of said A/D module is connected with the output terminal of said signal condition amplifying circuit, and the signal output part of said A/D module is connected with the signal input part of said central processing unit.
Preferably, said acquisition module also comprises: at least one signal input interface, each said signal input interface is the independent sample passage.
The present invention also provides a kind of production method of using the stress wave signal of above-mentioned coded signal detector, may further comprise the steps:
The said analog signal conversion that step 105, said transmitting probe will receive is a vibration signal, then, this vibration signal is sent to said object to be measured.
Preferably, said coded signal parameter information comprises: signal band constant interval information, signal sampling frequency information, signal record length information, signal amplitude information and voltage output information.
The present invention also provides a kind of corrugated tube grouting quality detection method of using above-mentioned coded signal detector; On the end face of first reinforcing bar of the arbitrary end face of corrugated tube, settle first sensor; On the beam slab face, play measuring point and settle second sensor along the route that studs with corrugated tube; Said first sensor is connected with first signal input interface on the said acquisition module, and said second sensor is connected with secondary signal input interface on the said acquisition module; And, said transmitting probe also with positive stable contact the in center of the end face of second reinforcing bar that is positioned at the center of the arbitrary end face of said corrugated tube; Said corrugated tube grouting quality detection method may further comprise the steps:
Step 201; Said transmitting probe sends vibration signal to said reinforcing bar, and then produces stress wave signal, and the second reinforcing bar spread out of said stress wave signal in from focus along corrugated tube goes; Smooth interface for the closely knit position of slip casting reflects away with certain angle simultaneously; Non-smooth interface for slip casting leakiness position scatters out so that different angles is irregular, and promptly stress wave reflects or scattering to acceptance point according to corrugated tube slip casting compaction rate, the stress wave after formation refraction or the scattering;
Step 202; Said first sensor at first receives the stress wave after the said refraction; And trigger said first sensor and said second sensor while opening entry, then through a time span, said second sensor receives the stress wave after said refraction or the scattering;
Step 203, said refraction that said first sensor and said second sensor will collect respectively or the stress wave after the scattering send said central processing unit to;
Step 204, said central processing unit carries out spectrum analysis and energy attenuation analysis to said refraction or the stress wave after the scattering that said second sensor receives, thereby confirms defect level and position in the said corrugated tube.
Preferably, the stress wave of said refraction back of said second sensor acquisition or scattering is specially: said second sensor is gathered the stress wave after said refraction or the scattering through the surperficial axially movable mode of beam slab said corrugated tube outside.
Preferably, said moving axially to equidistantly moving axially.
Preferably, said spacing is 10cm.
Beneficial effect of the present invention is following: coded signal detector provided by the invention and stress wave produce and corrugated tube grouting quality detection method; Not only can the construction quality of all kinds of objects under test be detected; But also realized purpose, thereby has the high advantage of accuracy of detection to the quantitative control of focus; And coded signal detector provided by the invention has multiple function, for example: shortcut, touch-screen etc., thus convenient for users to use.
Description of drawings
The structural representation of the coded signal detector that Fig. 1 provides for the embodiment of the invention;
The schematic flow sheet of the production method of the stress wave signal that Fig. 2 provides for the embodiment of the invention;
The utilization structure synoptic diagram of the corrugated tube grouting quality detection method that Fig. 3 provides for the embodiment of the invention.
Fig. 4 moves towards structural representation for the measuring point of the corrugated tube grouting quality detection method that the embodiment of the invention provides.
Embodiment
Below in conjunction with accompanying drawing a concrete embodiment of the present invention is described.
As shown in Figure 1, for a kind of coded signal detector provided by the invention, comprising: handheld terminal, transmitting probe and shockwave sensor; The signal output part of said handheld terminal is connected with said transmitting probe, and the signal input part of said handheld terminal is connected with said shockwave sensor.
Concrete, handheld terminal comprises: be used to produce and the central processing unit of object corresponding codes signal to be measured, the acquisition module that is connected with said central processing unit.
Further, said acquisition module comprises: D/A module, A/D module and signal condition amplifying circuit; The signal input part of said D/A module is connected with the signal output part of said central processing unit, and the signal output part of said D/A module is connected with the input end of said signal condition amplifying circuit; The signal input part of said A/D module is connected with the output terminal of said signal condition amplifying circuit, and the signal output part of said A/D module is connected with the signal input part of said central processing unit.In addition, acquisition module also comprises: at least one signal input interface, each signal input interface are the independent sample passage.Wherein, the quantity of signal input interface is adjusted according to actual needs, is preferably 4.Because each signal input interface is the independent sample passage, so, in the coded signal detector provided by the invention; When adopting 4 signal input interfaces; These 4 signal input interfaces connect a shockwave sensor respectively, and therefore, 4 shockwave sensors that are placed on diverse location can carry out the collection of stress wave simultaneously to object to be measured; Through handling the stress wave signal of 4 passages that 4 shockwave sensors collect; The result who draws from comparative analysis can better find the suitable measuring point of measurand on the one hand, on the other hand can more objective definite corrugated tube in the particular location of defective, thereby improve accuracy of detection.
Introduce the course of work of above-mentioned each module below:
Central processing unit at first produces and object corresponding codes signal to be measured; And this coded signal sent to the D/A module; The D/A module carries out sending to the signal condition amplifying circuit after the digital-to-analog conversion to coded signal, after conditioning is amplified, through transmitting probe signal is sent to object under test again.
Shockwave sensor sends to signal condition amplifying circuit, A/D module and central processing unit successively from the stress wave signal that testee collects, and is analyzed to the received signal by central processing unit.
Wherein, the A/D module, the conversion accuracy of D/A module is 24, and SF is up to 102.4KHz, and the user can regulate the SF of these two modules according to actual needs.
Among the present invention, according to Properties of Objects to be measured, central processing unit produces the corresponding codes signal, thereby has realized the quantitative control to focus, and then has improved accuracy of detection.
Among the present invention, object to be measured includes but not limited to: corrugated tube grouting quality, pile foundation quality, anchor rod anchored quality and the karst detection of pile foundation bottom etc.
For easy to use, handheld terminal provided by the invention can also comprise: USB interface, said USB interface is connected with said central processing unit.
Said handheld terminal can also comprise: wireless transport module, said wireless transport module is connected with said central processing unit.Wireless transport module can be the Wi-Fi transport module in actual use, thereby conveniently various information is transmitted.
Said handheld terminal can also comprise: touch screen module, said touch screen module is connected with said central processing unit.
Said handheld terminal can also comprise: the shortcut module, said shortcut module is connected with said central processing unit.Wherein, according to the needs that reality is used, the shortcut module can comprise: signals collecting confirm key and/or on select key and/or under select key.Because handheld terminal provided by the invention can be touch-screen; So; Use for further facilitating the user; The shortcut that directly coincide with signals collecting can also be set especially in that handheld terminal is outside, that is: signals collecting confirm key, on select key, select key down, wherein: on select key and select key to be mainly used in the signals collecting software parameter options setting and acquisition channel down to select; The user only need directly press and select key or select key can accomplish top selection operation down, and its function is common to the cursor position that shows in the touch-screen simultaneously; Signals collecting confirms that key is used for: when detector provided by the invention is operated in vibroseis mode of operation following time, confirm that through pressing signals collecting key reaches following two effects simultaneously: the first, to the testee transmit coded signals; The second, gather the stress wave signal that reflects through testee.When detector provided by the invention is operated in uncontrollable focus mode of operation following time, that is: focus produces through direct hammering testee, at this moment, confirms that through pressing signals collecting key can directly gather stress wave signal.
In addition, coded signal detector provided by the invention can also comprise: loudspeaker and/or microphone.Wherein, microphone is the equipment of received audio signal, and loudspeaker is an audio signal output equipment.
In sum, the detector of coded signal provided by the invention not only can detect the construction quality of all kinds of objects under test, but also has realized the purpose to the quantitative control of focus, thereby has the high advantage of accuracy of detection; And coded signal detector provided by the invention has multiple function, for example: shortcut, touch-screen etc., thus convenient for users to use.
The present invention also provides a kind of production method of using the stress wave signal of above-mentioned coded signal detector, and is as shown in Figure 2, may further comprise the steps:
Wherein, the coded signal parameter information comprises: signal band constant interval information, signal sampling frequency information, signal record length information, signal amplitude information and voltage output information.
Because it is very fast that central processing unit produces the speed of digitally encoded signal; And the D/A modular converter is slower to the speed that digitally encoded signal carries out digital-to-analog conversion; Therefore, for coordinating the work of central processing unit and D/A modular converter, avoid the D/A modular converter to take central processing unit; So, in central processing unit, need the signalization output buffer.After central processing unit produces digitally encoded signal at a high speed, this digitally encoded signal is deposited in the signal output buffer fast, then, central processing unit just can go to handle other data.Therefore, through the signalization output buffer, can effectively improve the processing power of central processing unit.
The said analog signal conversion that step 105, said transmitting probe will receive is a vibration signal, then, this vibration signal is sent to said object to be measured.
The present invention also provides a kind of corrugated tube grouting quality detection method of using above-mentioned coded signal detector; As shown in Figure 3; Be the use scene graph of a kind of corrugated tube grouting quality detection method provided by the invention, wherein, first corrugated tube 1, second corrugated tube 2, the 3rd corrugated tube 3 and the 4th corrugated tube 4 are positioned at the inside of beam slab 5; 5 reinforcing bars are all arranged in each corrugated tube, and Fig. 3 shows first reinforcing bar 6 and second reinforcing bar 7 in first corrugated tube 1.In the corrugated tube grouting quality detection method provided by the invention; Need at first on the end face of first reinforcing bar 6 of the arbitrary end face of corrugated tube, to settle first sensor 8; On the beam slab face, play measuring point and settle second sensor 9 along the route that studs with corrugated tube; First sensor 8 is connected with first signal input interface on the said acquisition module, and second sensor 9 is connected with secondary signal input interface on the said acquisition module; And transmitting probe 10 also contacts with the end face of second reinforcing bar 7 that is positioned at the center of the arbitrary end face of said corrugated tube is stable.
Said corrugated tube grouting quality detection method may further comprise the steps:
Step 201; Said transmitting probe sends vibration signal to said second reinforcing bar; And then generation stress wave signal; The second reinforcing bar spread out of said stress wave signal in from focus along corrugated tube goes, and the smooth interface for the closely knit position of slip casting reflects away with certain angle simultaneously, scatters out so that different angles is irregular for the non-smooth interface at slip casting leakiness position; Be that stress wave reflects or scattering to acceptance point according to corrugated tube slip casting compaction rate, the stress wave after formation refraction or the scattering.
Step 202; Said first sensor at first receives the stress wave after the said refraction; And trigger said first sensor and said second sensor while opening entry, then through a time span, said second sensor receives the stress wave after said refraction or the scattering;
Stress wave after said refraction of second sensor acquisition or the scattering; Be specially: said second sensor is gathered the stress wave after said refraction or the scattering through the axially movable mode in beam slab outside said corrugated tube surface; It moves axially should be for equidistantly moving axially, and wherein, the more little accuracy of detection of spacing is high more; But strengthening the testing amount, generally is 10cm.
Step 203, said refraction that said first sensor and said second sensor will collect respectively or the stress wave after the scattering send said central processing unit to;
Step 204, said central processing unit carries out spectrum analysis and energy attenuation analysis to the said stress wave that reflects back or scattering that said second sensor receives, thereby confirms defect level and position in the said corrugated tube.
Among the present invention, because first sensor is near transmitting probe, and in whole corrugated tube testing process, first sensor and transmitting probe are fixed.Stable, as shown in Figure 3 in a certain measuring point arrangement when second sensor, 11 is the measuring point that marks on the beam slab; When this signal is detected; At first transmitting probe sends vibration over against reinforcing bar, and then produces stress wave, and spread out goes forward in reinforcing bar; Simultaneously the smooth interface for the closely knit position of slip casting reflects away with certain angle, scatters out so that different angles is irregular for the rough interface at slip casting leakiness position.When elapsed time T1 first sensor detects stress wave signal (Mintrop wave); This moment first sensor, second sensor opening entry simultaneously; But have only this moment first sensor can receiving record to stress wave signal; Elapsed time T2 again, stress wave propagation is received simultaneously to second sensor and records (stress wave signal).Deduct the moment T1 that first sensor detects stress wave signal through second sensor to the moment T2 of stress wave signal, can obtain the time difference Δ t that stress wave is propagated between two sensors, that is: Δ t=T2-T1; The propagation distance that combines stress wave simultaneously, promptly length L can be asked for velocity of wave V=L/ Δ t, so that the aftertreatment data need.
As shown in Figure 4, for the measuring point of a kind of corrugated tube grouting quality detection method provided by the invention moves towards synoptic diagram, wherein, 11 represent beam slab positive, and 12 represent the beam slab back side.
Corrugated tube grouting quality detection method provided by the invention has the following advantages:
(1) the first sensor fixed in position is on a reinforcing bar of corrugated tube epicenter excitation end, as the triggering timing sensor, arrives the information such as the time difference and energy attenuation of two sensors through signal, is convenient to reprocessing analysis.
(2) according to the architectural feature of beam slab; Corrugated tube is apart from the close of beam slab plate face; Second sensor is placed on beam slab plate face equal intervals moves detection; The stress wave distance of the stress wave after the regular refraction of medium towards periphery or the irregular scattering second sensor in communication process is very near, so from second sensor to the stress wave energy loss very little, can more objectively confirm the particular location of defective in the corrugated tube through reprocessing analysis.
In sum; Coded signal detector that the application of the invention provides and stress wave produce and corrugated tube grouting quality detection method; Not only can detect various factors that influence construction quality such as corrugated tube grouting quality, pile foundation quality, anchor rod anchored quality and the karst detections of pile foundation bottom simultaneously; And can take into full account the difference of seismic source energy, can quantitatively control focus, thereby further improve the precision that detects.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be looked protection scope of the present invention.
Claims (10)
1. a coded signal detector is characterized in that, comprising: handheld terminal, transmitting probe and shockwave sensor; The signal output part of said handheld terminal is connected with said transmitting probe, and the signal input part of said handheld terminal is connected with said shockwave sensor.
2. coded signal detector according to claim 1 is characterized in that, said handheld terminal comprises: be used to produce and the central processing unit of object corresponding codes signal to be measured, the acquisition module that is connected with said central processing unit.
3. coded signal detector according to claim 2 is characterized in that, said acquisition module comprises: D/A module, A/D module and signal condition amplifying circuit; The signal input part of said D/A module is connected with the signal output part of said central processing unit, and the signal output part of said D/A module is connected with the input end of said signal condition amplifying circuit; The signal input part of said A/D module is connected with the output terminal of said signal condition amplifying circuit, and the signal output part of said A/D module is connected with the signal input part of said central processing unit.
4. coded signal detector according to claim 2 is characterized in that, said acquisition module also comprises: at least one signal input interface, each said signal input interface is the independent sample passage.
5. the production method of the stress wave signal of each said coded signal detector of application rights requirement 1-4 is characterized in that, may further comprise the steps:
Step 101 is provided with at least two signal output buffers in said central processing unit;
Step 102, said central processing unit receives and object property corresponding codes signal parameter information to be measured, and produces digitally encoded signal according to said coded signal parameter information;
Step 103 deposits said digitally encoded signal in the said signal output buffer that is provided with in the step 101 in;
Step 104 reads said digitally encoded signal from said signal output buffer, and said digitally encoded signal is carried out the D/A conversion, obtains simulating signal, and gives said transmitting probe with this analog signal transmission;
The said analog signal conversion that step 105, said transmitting probe will receive is a vibration signal, then, this vibration signal is sent to said object to be measured.
6. the production method of stress wave signal according to claim 5; It is characterized in that said coded signal parameter information comprises: signal band constant interval information, signal sampling frequency information, signal record length information, signal amplitude information and voltage output information.
7. an application rights requires the corrugated tube grouting quality detection method of each said coded signal detector of 1-4; It is characterized in that; On the end face of first reinforcing bar of the arbitrary end face of corrugated tube, settle first sensor; On the beam slab face, play measuring point along the route that studs with corrugated tube and settle second sensor, said first sensor is connected with first signal input interface on the said acquisition module, and said second sensor is connected with secondary signal input interface on the said acquisition module; And, said transmitting probe also with positive stable contact the in center of the end face of second reinforcing bar that is positioned at the center of the arbitrary end face of said corrugated tube; Said corrugated tube grouting quality detection method may further comprise the steps:
Step 201; Said transmitting probe sends vibration signal to said reinforcing bar, and then produces stress wave signal, and the second reinforcing bar spread out of said stress wave signal in from focus along corrugated tube goes; Smooth interface for the closely knit position of slip casting reflects away with certain angle simultaneously; Non-smooth interface for slip casting leakiness position scatters out so that different angles is irregular, and promptly stress wave reflects or scattering to acceptance point according to corrugated tube slip casting compaction rate, the stress wave after formation refraction or the scattering;
Step 202; Said first sensor at first receives the stress wave after the said refraction; And trigger said first sensor and said second sensor while opening entry, then through a time span, said second sensor receives the stress wave after said refraction or the scattering;
Step 203, said refraction that said first sensor and said second sensor will collect respectively or the stress wave after the scattering send said central processing unit to;
Step 204, said central processing unit carries out spectrum analysis and energy attenuation analysis to said refraction or the stress wave after the scattering that said second sensor receives, thereby confirms defect level and position in the said corrugated tube.
8. corrugated tube grouting quality detection method according to claim 7; It is characterized in that; The stress wave of said refraction back of said second sensor acquisition or scattering is specially: said second sensor is gathered the stress wave after said refraction or the scattering through the surperficial axially movable mode of beam slab said corrugated tube outside.
9. corrugated tube grouting quality detection method according to claim 8 is characterized in that, said moving axially to equidistantly moving axially.
10. corrugated tube grouting quality detection method according to claim 9 is characterized in that said spacing is 10cm.
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