CN102520069B - 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 the corrugated pipe grouting quality detection method.
Background technology
In recent years, the develop rapidly along with highway in China is built in the highway construction in the 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 affects the science of bridge building quality comprises: the pier stud quality of corrugated pipe grouting quality, concrete quality, supporting bridge and buried underground foundation pile construction quality etc.For Tunnel Engineering and high slope engineering; due 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 affects 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 to before engineering delivery is used, effectively detect the quality of above-mentioned various influence factors.
The existing method that detects above-mentioned various influence factor quality is mainly the stress wave detection method.And, in existing prospection stress wave detection method, focus is generally manually that mode by the hammering testee produces, this focus producing method is owing to being 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 to seismic source energy and frequency spectrum follow-up, thereby affected the precision that above-mentioned various influence factors are detected.
Summary of the invention
Defective for the prior art existence, the invention provides a kind of coded signal detector and stress wave produces and the corrugated pipe grouting quality detection method, by using this detector, not only can be simultaneously the various factors that affect construction quality such as corrugated pipe grouting quality, pile foundation quality, Detection of Bolt Bonding Integrity and pile foundation bottom Karst be detected, 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 solution adopted in the present invention is as follows:
The invention provides a kind of coded signal detector, comprising: handheld terminal, transmitting probe and shockwave sensor; The signal output part of described handheld terminal is connected with described transmitting probe, and the signal input part of described handheld terminal is connected with described shockwave sensor.
Preferably, described handheld terminal comprises: for generation of the central processing unit of the coded signal corresponding with object to be measured, the acquisition module that is connected with described central processing unit.
Preferably, described acquisition module comprises: D/A module, A/D module and signal condition amplifying circuit; The signal input part of described D/A module is connected with the signal output part of described central processing unit, and the signal output part of described D/A module is connected with the input end of described signal condition amplifying circuit; The signal input part of described A/D module is connected with the output terminal of described signal condition amplifying circuit, and the signal output part of described A/D module is connected with the signal input part of described central processing unit.
Preferably, described acquisition module also comprises: at least one signal input interface, each described 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, comprises the following steps:
The described analog signal conversion that step 105, described transmitting probe will receive is vibration signal, then, this vibration signal is sent to described object to be measured.
Preferably, described 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 pipe grouting quality detection method of using above-mentioned coded signal detector, settle first sensor on the end face of the first reinforcing bar of the arbitrary end face of corrugated tube, play measuring point along the route that studs with corrugated tube and settle the second sensor on the beam slab face, described first sensor is connected with first signal input interface on described acquisition module, and described the second sensor is connected with secondary signal input interface on described acquisition module; And, described 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 described corrugated tube; Described corrugated pipe grouting quality detection method comprises the following steps:
Step 201, described transmitting probe sends vibration signal to described reinforcing bar, and then generation stress wave signal, the second reinforcing bar spread out of described stress wave signal in from focus along corrugated tube goes, the smooth interface of while for the closely knit position of slip casting reflects away with certain angle, non-smooth interface for slip casting leakiness position scatters out so that different angles is irregular, and namely stress wave to acceptance point refraction or scattering, forms the stress wave after refraction or scattering according to corrugated tube slip casting compaction rate;
Step 202, at first described first sensor receives the stress wave after described refraction, and trigger described first sensor and described the second sensor begins record simultaneously, then through a time span, described the second sensor receives the stress wave after described refraction or scattering;
Step 203, the described refraction that described first sensor and described the second sensor will collect respectively or the stress wave after scattering send described central processing unit to;
Step 204, described central processing unit carries out spectrum analysis and energy attenuation analysis to described refraction or the stress wave after scattering that described the second sensor receives, thereby determines defect level and position in described corrugated tube.
Preferably, after described the second sensor gathers described refraction or the stress wave of scattering, be specially: described the second sensor gathers stress wave after described refraction or scattering by the surperficial axially movable mode of beam slab described corrugated tube outside.
Preferably, described moving axially as equidistantly moving axially.
Preferably, described spacing is 10cm.
Beneficial effect of the present invention is as follows: coded signal detector provided by the invention and stress wave produce and the corrugated pipe grouting quality detection method, not only can the construction quality of all kinds of objects under test be detected, but also realized the quantitative purpose of controlling of focus, thereby have advantages of that accuracy of detection is high; And coded signal detector provided by the invention has several functions, such as: 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 present invention;
The schematic flow sheet of the production method of the stress wave signal that Fig. 2 provides for the embodiment of the present invention;
The use structural representation of the corrugated pipe grouting quality detection method that Fig. 3 provides for the embodiment of the present invention.
Fig. 4 moves towards structural representation for the measuring point of the corrugated pipe grouting quality detection method that the embodiment of the present invention provides.
Embodiment
Below in conjunction with accompanying drawing, a concrete embodiment of the present invention is described.
As shown in Figure 1, be a kind of coded signal detector provided by the invention, comprise: handheld terminal, transmitting probe and shockwave sensor; The signal output part of described handheld terminal is connected with described transmitting probe, and the signal input part of described handheld terminal is connected with described shockwave sensor.
Concrete, handheld terminal comprises: for generation of the central processing unit of the coded signal corresponding with object to be measured, the acquisition module that is connected with described central processing unit.
Further, described acquisition module comprises: D/A module, A/D module and signal condition amplifying circuit; The signal input part of described D/A module is connected with the signal output part of described central processing unit, and the signal output part of described D/A module is connected with the input end of described signal condition amplifying circuit; The signal input part of described A/D module is connected with the output terminal of described signal condition amplifying circuit, and the signal output part of described A/D module is connected with the signal input part of described 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 coded signal detector provided by the invention, when adopting 4 signal input interfaces, these 4 signal input interfaces connect respectively a shockwave sensor, therefore, 4 shockwave sensors that are placed on diverse location can carry out the collection of stress wave simultaneously to object to be measured, by processing the stress wave signal of 4 passages that 4 shockwave sensors collect, the result that draws from comparative analysis can better find the suitable measuring point of measurand on the one hand, the particular location of defective on the other hand can more objective definite corrugated tube, thereby raising accuracy of detection.
The below introduces the course of work of above-mentioned each module:
At first central processing unit produces the coded signal corresponding with object to be measured, and this coded signal is sent to the D/A module, the D/A module carries out sending to the signal condition amplifying circuit after digital-to-analog conversion to coded signal, after conditioning is amplified, then by transmitting probe, signal is sent to object under test.
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 sample frequency is up to 102.4KHz, and the user can regulate the sample frequency of these two modules according to actual needs.
In the present invention, according to Properties of Objects to be measured, central processing unit produces corresponding coded signal, thereby has realized the quantitative control to focus, and then has improved accuracy of detection.
In the present invention, object to be measured includes but not limited to: corrugated pipe grouting quality, pile foundation quality, Detection of Bolt Bonding Integrity and pile foundation bottom Karst etc.
For easy to use, handheld terminal provided by the invention can also comprise: USB interface, described USB interface is connected with described central processing unit.
Described handheld terminal can also comprise: wireless transport module, described wireless transport module is connected with described central processing unit.Wireless transport module can be the Wi-Fi transport module in actual use, thereby conveniently various information is transmitted.
Described handheld terminal can also comprise: touch screen module, described touch screen module is connected with described central processing unit.
Described handheld terminal can also comprise: the shortcut module, described shortcut module is connected with described central processing unit.Wherein, according to the needs that reality is used, the shortcut module can comprise: signals collecting determine 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, at the outside all right special shortcut that directly coincide with signals collecting that arranges of handheld terminal, that is: signals collecting determine key, on select key, the lower key that selects, wherein: on select key and under select key to be mainly used in signals collecting software that parameter options is set and acquisition channel is selected, the user only need to directly press select key or under select key can complete top selection operation, its function is common to the cursor position that shows in touch-screen simultaneously; Signals collecting determines that key is used for: when detector provided by the invention is operated in vibroseis mode of operation lower time, determine that by 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 lower time, that is: focus produces by direct hammering testee, at this moment, determines that by 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 audio-frequency signal output apparatus.
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 quantitative purpose of controlling of focus, thereby has advantages of that accuracy of detection is high; And coded signal detector provided by the invention has several functions, such as: 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, as shown in Figure 2, comprises the following 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.
The speed that produces digitally encoded signal due to central processing unit is very fast, 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, need the signalization output buffer in central processing unit.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 process other data.Therefore, by the signalization output buffer, can effectively improve the processing power of central processing unit.
The described analog signal conversion that step 105, described transmitting probe will receive is vibration signal, then, this vibration signal is sent to described object to be measured.
The present invention also provides a kind of corrugated pipe grouting quality detection method of using above-mentioned coded signal detector, as shown in Figure 3, use scenes figure for a kind of corrugated pipe grouting quality detection method provided by the invention, wherein, the first corrugated tube 1, the 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 the first reinforcing bar 6 and the second reinforcing bar 7 in the first corrugated tube 1.In corrugated pipe grouting quality detection method provided by the invention, need at first to settle first sensor 8 on the end face of the first reinforcing bar 6 of the arbitrary end face of corrugated tube, play measuring point along the route that studs with corrugated tube and settle the second sensor 9 on the beam slab face, first sensor 8 is connected with first signal input interface on described acquisition module, and the second sensor 9 is connected with secondary signal input interface on described 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 described corrugated tube is stable.
Described corrugated pipe grouting quality detection method comprises the following steps:
Step 201, described transmitting probe sends vibration signal to described the second reinforcing bar, and then generation stress wave signal, the second reinforcing bar spread out of described stress wave signal in from focus along corrugated tube goes, the smooth interface of while for the closely knit position of slip casting reflects away with certain angle, non-smooth interface for slip casting leakiness position scatters out so that different angles is irregular, 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 scattering.
Step 202, at first described first sensor receives the stress wave after described refraction, and trigger described first sensor and described the second sensor begins record simultaneously, then through a time span, described the second sensor receives the stress wave after described refraction or scattering;
The second sensor gathers the stress wave after described refraction or scattering, be specially: described the second sensor gathers stress wave after described refraction or scattering by the axially movable mode in beam slab outside described corrugated tube surface, it moves axially should be for equidistantly moving axially, wherein, the less accuracy of detection of spacing is higher, but strengthening the testing amount, is generally 10cm.
Step 203, the described refraction that described first sensor and described the second sensor will collect respectively or the stress wave after scattering send described central processing unit to;
After the described refraction that step 204, described central processing unit receive described the second sensor or the stress wave of scattering carry out spectrum analysis and energy attenuation analysis, thereby determine defect level and position in described corrugated tube.
In the present invention, near transmitting probe, and in whole corrugated tube testing process, first sensor and transmitting probe are fixed due to first sensor.When second sensor settled stable at a certain measuring point, as shown in Figure 3,11 is the measuring point that marks on 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 slip casting closely knit position 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), first sensor, the second sensor begin record simultaneously at this moment, but only have this moment first sensor can receiving record to stress wave signal, elapsed time T2 again, stress wave propagation is to the second sensor received be recorded to (stress wave signal) simultaneously.The moment T2 that stress wave signal detected by the second sensor deducts the moment T1 that first sensor detects stress wave signal, can obtain the time difference Δ t that stress wave is propagated between two sensors, that is: Δ t=T2-T1; In conjunction with the stress wave propagation distance, namely length L, can ask for velocity of wave V=L/ Δ t simultaneously, so that the aftertreatment data need.
As shown in Figure 4, for the measuring point of a kind of corrugated pipe grouting quality detection method provided by the invention moves towards schematic diagram, wherein, 11 represent that beam slab is positive, and 12 represent the beam slab back side.
Corrugated pipe 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 time difference of two sensors and energy attenuation by signal, is convenient to reprocessing analysis.
(2) according to the architectural feature of beam slab, corrugated tube is very near apart from the distance of beam slab plate face, the 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 irregular scattering second sensor in communication process is very near, the stress wave energy loss that detects from the second sensor so is very little, can the more objective particular location of determining defective in corrugated tube by reprocessing analysis.
In sum, the coded signal detector that the application of the invention provides and stress wave produce and the corrugated pipe grouting quality detection method, not only can be simultaneously the various factors that affect construction quality such as corrugated pipe grouting quality, pile foundation quality, Detection of Bolt Bonding Integrity and pile foundation bottom Karst be detected, 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 is only the preferred embodiment 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 improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
Claims (6)
1. a corrugated pipe grouting quality detection method of using coded signal detector, is characterized in that, described coded signal detector comprises: handheld terminal, transmitting probe, the first shockwave sensor and the second shockwave sensor; The signal output part of described handheld terminal is connected with described transmitting probe, and the signal input part of described handheld terminal is connected with described the second shockwave sensor with described the first shockwave sensor respectively; Described handheld terminal comprises: for generation of the central processing unit of the coded signal corresponding with object to be measured, the acquisition module that is connected with described central processing unit; Wherein, described acquisition module also comprises two signal input interfaces, and each described signal input interface is the independent sample passage;
Settle the first shockwave sensor on the end face of the first reinforcing bar of the arbitrary end face of corrugated tube, play measuring point along the route that studs with corrugated tube and settle the second shockwave sensor on the beam slab face, described the first shockwave sensor is connected with first signal input interface on described acquisition module, and described the second shockwave sensor is connected with secondary signal input interface on described acquisition module; And, described 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 described corrugated tube; Described corrugated pipe grouting quality detection method comprises the following steps:
Step 201, described transmitting probe sends vibration signal to described the second reinforcing bar, and then generation stress wave signal, the second reinforcing bar spread out of described stress wave signal in from focus along corrugated tube goes, the smooth interface of while for the closely knit position of slip casting reflects away with certain angle, non-smooth interface for slip casting leakiness position scatters out so that different angles is irregular, 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 scattering;
Step 202, at first described the first shockwave sensor receives the stress wave after described refraction, and trigger described the first shockwave sensor and described the second shockwave sensor begins record simultaneously, then through a time span, described the second shockwave sensor receives the stress wave after described refraction or scattering;
Step 203, the described refraction that described the first shockwave sensor and described the second shockwave sensor will collect respectively or the stress wave after scattering send described central processing unit to; Wherein, the stress wave that gathers after described refraction or scattering of described the second shockwave sensor is specially: described the second shockwave sensor gathers stress wave after described refraction or scattering by the surperficial axially movable mode of beam slab described corrugated tube outside;
Step 204, described central processing unit carries out spectrum analysis and energy attenuation analysis to described refraction or the stress wave after scattering that described the second shockwave sensor receives, thereby determines defect level and position in described corrugated tube.
2. corrugated pipe grouting quality detection method according to claim 1, is characterized in that, described moving axially as equidistantly moving axially.
3. corrugated pipe grouting quality detection method according to claim 2, is characterized in that, described spacing is 10cm.
4. corrugated pipe grouting quality detection method according to claim 1, is characterized in that, described acquisition module comprises: D/A module, A/D module and signal condition amplifying circuit; The signal input part of described D/A module is connected with the signal output part of described central processing unit, and the signal output part of described D/A module is connected with the input end of described signal condition amplifying circuit; The signal input part of described A/D module is connected with the output terminal of described signal condition amplifying circuit, and the signal output part of described A/D module is connected with the signal input part of described central processing unit.
5. corrugated pipe grouting quality detection method according to claim 1, is characterized in that, step 201, and described transmitting probe sends vibration signal to the second reinforcing bar, and then produces the method for stress wave signal, comprises the following steps:
Step 101 arranges at least two signal output buffers in described central processing unit;
Step 102, described central processing unit receives the coded signal parameter information corresponding with object property to be measured, and produces digitally encoded signal according to described coded signal parameter information;
Step 103 deposits described digitally encoded signal in the described signal output buffer that arranges in step 101;
Step 104 reads described digitally encoded signal from described signal output buffer, and described digitally encoded signal is carried out the D/A conversion, obtains simulating signal, and gives described transmitting probe with this analog signal transmission;
The described analog signal conversion that step 105, described transmitting probe will receive is vibration signal, then, this vibration signal is sent to described object to be measured.
6. corrugated pipe grouting quality detection method according to claim 5, it is characterized in that, described 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.
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| CN104035434A (en) * | 2014-06-13 | 2014-09-10 | 武汉理工大学 | Air leakage monitoring system for diesel engine air valve |
| CN107843652A (en) * | 2017-11-10 | 2018-03-27 | 武汉市工程科学技术研究院 | Portable anchor rod anchoring quality detecting instrument and detection method |
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