CN201340258Y

CN201340258Y - Concrete thickness gauge

Info

Publication number: CN201340258Y
Application number: CNU2008201229111U
Authority: CN
Inventors: 赵岩; 蔡友发
Original assignee: BEIJING INST OF ELECTRO-OPTICS
Current assignee: BEIJING INST OF ELECTRO-OPTICS
Priority date: 2008-09-27
Filing date: 2008-09-27
Publication date: 2009-11-04
Anticipated expiration: 2018-09-27

Abstract

The utility model relates to a concrete thickness gauge, comprising a sonic probe which transmits sonic signals to concrete and receives the reflected sonic signals to obtain multiple measurement data, wherein the sonic probe is connected with a microprocessor which receives multiple measurement data and obtains the thickness of concrete through statistic, and the sonic probe comprises a pinger, a sonic receiver and an amplifiltering circuit; the pinger transmits sonic signals to the concrete, and the sonic receiver receives the reflected sonic signals; and the pinger and the sonic receiver are respectively connected with the amplifiltering circuit which is connected with an interface circuit. Through multiple repeated transmission and the statistic of measurements results, the average value of the thickness of the concrete is obtained, so that the measurement results are stable, and the precision is high, and the consistency of measurement is ensured by adopting different transmission frequencies; and further, the sonic transmitter and the sonic receiver are arranged on the same sonic probe so as to simplify the structure and shorten the measurement procedure and time.

Description

The concrete thicknessmeter

Technical field

The utility model relates to a kind of concrete thickness measurement mechanism, relates in particular to a kind of concrete thicknessmeter.

Background technology

In excavation is constructed, because normal existence owes to dig phenomenon or wall rock loosening is out of shape, can cause the tunnel cross-section size to reduce, in order to guarantee the headroom after tunnel-liner is completed, unit in charge of construction tends to reduce the thickness of lining cutting, can cause the deficiency of lining thickness like this.Yet in constructing tunnel, the thickness of tunnel-liner is the key factor that influences the tunnel-liner construction quality, and the lining thickness deficiency will influence the load-bearing capacity in tunnel, and causes water-impervious, freezing tolerance to reduce.Because geology, hydrologic regime complexity in the construction, unpredictable element is more, therefore makes the measurement of thickness of tunnel linings comparatively difficult.

A kind of method of measuring thickness of tunnel linings of prior art is a bore extracting core process, and this method is observed directly, effect comes into plain view, but lining cutting has been brought certain destructiveness, can cause damage to structure if sampling repairs more at most.The another kind of method of measuring thickness of tunnel linings of prior art adopts the acoustic measurement method, promptly utilizes the measured lining cutting of hand hammer hammering to judge the travel-time of sound wave, then utilizes the sound wave receiving transducer to receive.This method can only be carried out 3～5 measurements at most, and along with the quick decay of signal can cause the measurement result instability; Moreover, because the dynamics of each hammering can change with user's difference, can cause the discreteness of measuring numerical value bigger, measuring accuracy is low, and measuring result error is big.

The utility model content

The purpose of this utility model provides a kind of concrete thicknessmeter, effectively solves technical matterss such as existing measuring method measurement result instability, error are big.

For achieving the above object, the utility model provides a kind of concrete thicknessmeter, comprise to concrete emission acoustic signals and receive reflecting the sonic probe that acoustic signals obtains repeatedly measurement data, described sonic probe with receive described repeatedly measurement data and be connected by the microprocessor of adding up the acquisition concrete thickness.

Wherein, described sonic probe can be connected with described microprocessor by interface circuit.

Further, described sonic probe comprises to the pinger of concrete emission acoustic signals, receives the acoustic receiver and the amplification filtering circuit that reflect acoustic signals, described pinger is connected with described amplification filtering circuit respectively with acoustic receiver, and described amplification filtering circuit is connected with described interface circuit.

Described pinger is the HF transmitter of exportable 20 kilo hertzs～40 kilo hertzs of high-frequency pulses.

On the technique scheme basis, described microprocessor comprises control module, is connected with described sonic probe and receives repeatedly the interface module of measurement data and according to the computing module of described repeatedly measurement data by statistics acquisition concrete thickness, described control module is connected with described computing module with described interface module respectively.

Described control module further comprises centralized control unit, be used to control the emission controlling unit of firing order, emitting times and each time Transmission Time Interval and be used for once switching to the frequency switch unit of next transmission frequency after the emission, described emission controlling unit is connected with centralized control unit with described interface module respectively with the frequency switch unit, and described centralized control unit is connected with described computing module.

Further, also comprise LCD and storer, described LCD is connected with described centralized control unit respectively with storer.

The utility model provides a kind of concrete thicknessmeter, adopt microprocessor control sonic probe to transmit and receive acoustic signals to detected concrete, under the situation of known acoustic signals velocity of propagation in concrete, calculate concrete thickness by measuring the travel-time of acoustic signals in concrete.The utility model is by adopting repeatedly repeat its transmission, and each time measurement result is added up the mean value that draws concrete thickness, makes that measurement result is stable, degree of accuracy is high, guaranteed the consistance of measuring by adopting different transmission frequencies.Further, the utility model simplifies the structure by pinger and acoustic receiver are arranged in the same sonic probe, has shortened the program and the time of measuring.

Description of drawings

Fig. 1 is the structural representation of the utility model concrete thicknessmeter embodiment one;

Fig. 2 is the structural representation of the utility model concrete thicknessmeter embodiment two;

Fig. 3 is the structural representation of the utility model concrete thicknessmeter embodiment three;

Fig. 4 is the structural representation of the utility model concrete thicknessmeter embodiment four.

Description of reference numerals:

The 100-sonic probe; The 200-microprocessor; The 300-interface circuit;

The 400-LCD; The 500-storer; The 101-pinger;

The 102-acoustic receiver; 103-amplification filtering circuit; The 201-interface module;

The 202-control module; The 203-computing module; The 2021-emission controlling unit;

2022-frequency switch unit; The 2023-centralized control unit.

Embodiment

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Fig. 1 is the structural representation of the utility model concrete thicknessmeter embodiment one, as shown in Figure 1, present embodiment concrete thicknessmeter comprises sonic probe 100 and microprocessor 200, wherein, sonic probe 100 is used for to concrete emission acoustic signals, and reception reflects acoustic signals, to obtain repeatedly measurement data, microprocessor 200 is connected with sonic probe 100, is used for receiving repeatedly measurement data from sonic probe 100, and obtains concrete thickness by statistics.

When measuring concrete thickness, sonic probe 100 is arranged on a side on detected concrete surface, because sonic probe 100 is connected with microprocessor 200, therefore under the control of microprocessor 200, sonic probe 100 is to detected concrete emission acoustic signals, when arriving the detected concrete surface, acoustic signals is reflected, sonic probe 100 receives first acoustic signals that reflects and sends into microprocessor 200, when acoustic signals arrives the detected concrete back side by secondary reflection again, second acoustic signals that reflects is received and sends into microprocessor 200 by sonic probe 100, microprocessor 200 calculates acquisition detected concrete one-tenth-value thickness 1/10 according to first acoustic signals and second acoustic signals, calculating is specially: at first calculate the time interval between first acoustic signals and second acoustic signals, according to the velocity of propagation of acoustic signals in concrete, can obtain the detected concrete one-tenth-value thickness 1/10 then.After one-shot measurement, under the control of microprocessor 200, to detected concrete emission acoustic signals, process as previously mentioned once more for sonic probe 100, through measurement repeatedly, 200 pairs of data of repeatedly measuring of microprocessor are added up and are drawn the detected concrete average thickness value.

Present embodiment concrete thicknessmeter adopts microprocessor control sonic probe to transmit and receive acoustic signals to detected concrete, under the situation of known acoustic signals velocity of propagation in concrete, calculate concrete thickness by measuring the travel-time of acoustic signals in concrete, and adopted and repeatedly launched acoustic signals, measurement data is added up the mean value that draws concrete thickness, make the result of measurement stable, the degree of accuracy height.

Fig. 2 is the structural representation of the utility model concrete thicknessmeter embodiment two, and as shown in Figure 2, on the basis of the utility model embodiment one, sonic probe 100 can be connected with microprocessor 200 by interface circuit 300.As a preferred embodiment, sonic probe 100 comprises pinger 101, acoustic receiver 102 and amplification filtering circuit 103, pinger 101 is used for to concrete emission acoustic signals, acoustic receiver 102 is used for reception and reflects acoustic signals, amplification filtering circuit 103 is connected with acoustic receiver 102 with pinger 101 respectively, be used for that acoustic signals is carried out amplification filtering and handle, amplification filtering circuit 103 is connected with interface circuit 300 simultaneously.In actual the use, pinger 101 can be the HF transmitter of exportable 20 kilo hertzs～40 kilo hertzs of high-frequency pulses, preferably, and the high-frequency pulse that pinger 101 outputs are 30 kilo hertzs.

The concrete thicknessmeter of present embodiment is by being arranged on pinger and acoustic receiver in the sonic probe, transmitting and receiving in same sonic probe of sound wave carried out, not only have characteristic of simple structure, and simplified the program and the time of measuring, made things convenient for the use of instrument.Because pinger is connected with the amplification filtering circuit respectively with acoustic receiver, changed into digital signal by simulating signal behind the acoustic signals process amplification filtering circuit that makes pinger emitting sound wave signal and acoustic receiver receive, effective like this distorted signals of having avoided simulating signal to cause owing to transmission attenuation, thus make measurement result more accurate.

Fig. 3 is the structural representation of the utility model concrete thicknessmeter embodiment three, as shown in Figure 3, microprocessor 200 comprises interface module 201, control module 202 and computing module 203, wherein, interface module 201 is connected with sonic probe 100 by interface circuit 300, is used to receive repeatedly measurement data; Control module 202 is connected with interface module 201, is used for reflecting acoustic signals by interface module 201 control sonic probes, 100 emission acoustic signals and reception; Computing module 203 is connected with control module 202, is used under the control of control module 202 obtaining concrete thickness according to measurement data repeatedly by statistics.Further, control module 202 comprises emission controlling unit 2021, frequency switch unit 2022 and centralized control unit 2023, emission controlling unit 2021 is used for to sonic probe 100 sending controling instructions, the emitting times of control sonic probe 100 emission acoustic signals, parameters such as each time launch time, frequency switch unit 2022 is used for instructing to sonic probe 100 emission control, control sonic probe 100 is once switching to next transmission frequency after the emission, centralized control unit 2023 respectively with emission controlling unit 2021, frequency switch unit 2022 is connected with computing module 203, is used to control emission controlling unit 2021, the work of frequency switch unit 2022 and computing module 203.

When measuring concrete thickness, because emission controlling unit 2021 is connected with centralized control unit 2023, therefore under the control of centralized control unit 2023, emission controlling unit 2021 sends firing order by interface module 201 to pinger 101, pinger 101 is carried out corresponding firing order and is launched acoustic signals to detected concrete, reflection when acoustic signals arrives the detected concrete surface, acoustic receiver 102 receives first acoustic signals that reflects and sends in the centralized control unit 2023 by interface module 201, secondary reflection again when acoustic signals arrives the detected concrete back side, second acoustic signals that reflects is received by acoustic receiver 102 and sends in the centralized control unit 2023 by interface module 201, under the control of centralized control unit 2023, computing module 203 calculates acquisition detected concrete one-tenth-value thickness 1/10 according to first acoustic signals and second acoustic signals, and concrete computation process is described with embodiment one.Be connected with centralized control unit 2023 owing to frequency switch unit 2022 again, under the control of centralized control unit 2023, after one-shot measurement finishes, frequency switch unit 2022 switches to next transmission frequency, emission controlling unit 2021 sends firing order by interface module 201 to pinger 101 once more, and process as previously mentioned.Through after the repeatedly measurement of different frequency, 203 pairs of computing modules repeatedly measurement data are added up and are drawn the detected concrete average thickness value.

The concrete thicknessmeter of present embodiment, its microprocessor have the function of switching each time transmission frequency, adopt different frequencies like this in each time measured, and have guaranteed the consistance of measuring.

Fig. 4 is the structural representation of the utility model concrete thicknessmeter embodiment four, as shown in Figure 4, on the basis of the foregoing description, the concrete thicknessmeter also comprises LCD 400 and storer 500, LCD 400 is connected with centralized control unit 2023 in the microprocessor 200, be used to show measurement result, storer 500 is connected with centralized control unit 2023 in the microprocessor 200, is used for storage of measurement data and measurement result.

The concrete thicknessmeter of present embodiment has increased LCD again and has shown result of calculation on the basis of previous embodiment, and has data storage function, makes the result of calculation of concrete thicknessmeter more directly perceived, more perfect function.

It should be noted last that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the spirit and scope of technical solutions of the utility model.

Claims

1, a kind of concrete thicknessmeter, it is characterized in that, comprise to concrete emission acoustic signals and receive reflecting the sonic probe that acoustic signals obtains repeatedly measurement data, described sonic probe with receive described repeatedly measurement data and be connected by the microprocessor of adding up the acquisition concrete thickness.

2, concrete thicknessmeter according to claim 1 is characterized in that, described sonic probe is connected with described microprocessor by interface circuit.

3, concrete thicknessmeter according to claim 2, it is characterized in that, described sonic probe comprises to the pinger of concrete emission acoustic signals, receives the acoustic receiver and the amplification filtering circuit that reflect acoustic signals, described pinger is connected with described amplification filtering circuit respectively with acoustic receiver, and described amplification filtering circuit is connected with described interface circuit.

4, concrete thicknessmeter according to claim 3 is characterized in that, described pinger is the HF transmitter of exportable 20 kilo hertzs～40 kilo hertzs of high-frequency pulses.

5, according to the described concrete thicknessmeter of arbitrary claim in the claim 1～4, it is characterized in that, described microprocessor comprises control module, is connected with described sonic probe and receives repeatedly the interface module of measurement data and according to the computing module of described repeatedly measurement data by statistics acquisition concrete thickness, described control module is connected with described computing module with described interface module respectively.

6, concrete thicknessmeter according to claim 5, it is characterized in that, described control module comprises centralized control unit, be used to control the emission controlling unit of firing order, emitting times and each time Transmission Time Interval and be used for once switching to the frequency switch unit of next transmission frequency after the emission, described emission controlling unit is connected with centralized control unit with described interface module respectively with the frequency switch unit, and described centralized control unit is connected with described computing module.

7, concrete thicknessmeter according to claim 6 is characterized in that, also comprises LCD and storer, and described LCD is connected with described centralized control unit respectively with storer.