CN209416618U - A kind of novel online scan-type ultrasonic gas leak detection system - Google Patents
A kind of novel online scan-type ultrasonic gas leak detection system Download PDFInfo
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- CN209416618U CN209416618U CN201822257106.6U CN201822257106U CN209416618U CN 209416618 U CN209416618 U CN 209416618U CN 201822257106 U CN201822257106 U CN 201822257106U CN 209416618 U CN209416618 U CN 209416618U
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Abstract
The utility model provides a kind of novel online scan-type ultrasonic gas leak detection system, including data processing controller, holder and the ultrasonic receiver being mounted on the holder and laser ranging module；Real-time reception ultrasonic signal is uploaded to the data processing controller in holder rotary course described in the ultrasonic receiver；The data processing controller determines source of leaks direction according to the maximum ultrasonic signal obtained during the holder rotary scanning, controls the holder and rotates to source of leaks direction, and controls the laser ranging module and carry out laser ranging, obtains source of leaks distance；The frequency data of maximum ultrasonic signal and amplitude data and source of leaks distance are substituted into and train neural network model by the data processing controller, source of leaks pressure value and source of leaks leak hole diameter are calculated, and according to source of leaks pressure value and the estimated leakage rate of source of leaks leak hole diameter.
Description
Technical field
The utility model relates to a kind of ultrasonic gas leak detection systems, specifically, relate to a kind of novel online scanning
Formula ultrasonic gas leak detection system.
Background technique
Industry, which neutralizes, largely uses pressure vessel for storing and conveying compressed gas in life, as cylinder, gas tank,
Gas piping etc., wherein only in petrochemical industry, China just possesses all kinds of of thousands of huge air accumulators and tens of thousands of kms or more
Pressure pipeline.Due to many reasons such as the manufacturing quality of equipment and time between overhauls(TBO) length, leakage accident is frequent occurrence.Leakage is not only
The waste that will cause the energy brings great economic loss to society, once and toxic and harmful gas leak, can also be to week
Collarette border and human life's property safety generate threat.Therefore Leakage inspection is of crucial importance.
Main using gas detector industrial at present detects leakage, however gas detector will receive gas kind
Class influences, and needs that gas leakage is waited to assemble when detecting, and consuming time is long, and it is timely cannot to leak early stage progress in gas
Detection, and in gas leakage accumulation process be easy by harsh weather, wind direction, leak position and gas leakage diffusion dilution etc.
The influence of factor, measurement precision also cannot be guaranteed.
Ultrasonic leak detector is the ultrasonic signal generated when being occurred by analysis gas leakage, to determine whether there is leakage
It generates, can effectively avoid disadvantages mentioned above, but existing ultrasonic wave leak hunting instrument, the positioning to source of leaks that can't be done.
In order to solve the above problems, people are seeking always a kind of ideal technical solution.
Summary of the invention
The purpose of this utility model is in view of the deficiencies of the prior art, to provide a kind of novel online scan-type ultrasound
Wave Air leakage detector system.
To achieve the goals above, the technical scheme adopted by the utility model is a kind of novel online scan-type ultrasound
Wave Air leakage detector system including data processing controller, holder and the ultrasonic receiver being mounted on the holder and swashs
Ligh-ranging module, the holder, the ultrasonic receiver and the laser ranging module with the data processing controller
Connection；
The data processing controller controls the rotary scanning that the holder realizes space, and the ultrasonic receiver is in institute
It states real-time reception ultrasonic signal in holder rotary course and is uploaded to the data processing controller；
The data processing controller is determined according to the maximum ultrasonic signal obtained during the holder rotary scanning
Source of leaks direction controls the holder and rotates to source of leaks direction, and controls the laser ranging module and carry out laser ranging, obtains
Obtain source of leaks distance.
Based on above-mentioned, the data processing controller, which controls the holder, to carry out rotation according to different paths and sweeps
It retouches, is horizontal sweep respectively, vertical scanning, panoramic scanning, from coil to coil scanning, progressive scan, helical scanning, apple skin scanning, mixes
Close scanning or rosette scan.
Based on above-mentioned, the holder includes that the upright bar being arranged on the ground, the level being fixed in the upright bar turn
Dynamic pedestal is arranged in the vertical rotating stand horizontally rotated on pedestal, described horizontally rotates the rotation of pedestal level for driving
The horizontal drive motor turned and the vertical driving motor for driving the vertical rotating stand vertical rotary dynamic, the ultrasound
Wave receiver and the laser ranging module are built up in horizontal drive motor and institute described in the vertical rotating stand two sides respectively
Vertical driving motor is stated to connect with the data processing controller respectively.
Based on above-mentioned, signal amplification filtering is additionally provided between the ultrasonic receiver and the data processing controller
Circuit and analog to digital conversion circuit, the signal amplification circuit filter include gain adjustable amplifying circuit and second order active bandpass filtering
Circuit；
The gain adjustable amplifying circuit is connect with the ultrasonic receiver, for increasing to the ultrasonic signal
Benefit amplification；
The second order active bandwidth-limited circuit is connect with the signal amplification circuit, for filtering out the ultrasonic signal
In noise jamming.
The utility model has substantive features and progress compared with the prior art, specifically, the utility model combination cloud
Platform scanning technique can be realized the leakage monitoring of 360 degree of gamuts, and search reception in real time by the ultrasonic receiver
The ultrasonic signal that gas leakage generates, to determine source of leaks direction；After determining source of leaks direction, in conjunction with laser ranging technique,
The distance away from source of leaks is further determined that, to realize the positioning to source of leaks.
The utility model can be suitable for the premature leak early warning of any compressed gas, leakage measurement and leakage point
Positioning, have is not influenced by factors such as harsh weather, wind direction, leak position and gas leakage diffusion dilutions, and it is passive not need
The advantages that waiting the aggregation of hazardous gas, it is good to be highly suitable for outdoor ventilation condition, and especially extreme environment tradition passes
Sensor is easy the Leakage inspection in the case where failure.
Detailed description of the invention
Fig. 1 is the principles of the present invention block diagram.
Fig. 2 is the structural schematic diagram of holder in the utility model.
Fig. 3 is broadband ultrasonic receiver receiving sensitivity/frequency schematic diagram.
Fig. 4 is the circuit diagram of gain adjustable amplifying circuit in the utility model.
Fig. 5 is the circuit diagram of second order active bandwidth-limited circuit in the utility model.
Fig. 6 is the structure chart of BP neural network model in the utility model.
In figure, 1. upright bars；2. ground；3. horizontally rotating pedestal；4. vertical rotating stand；5. explosion-proof bobbin.
Specific embodiment
In order to make it easy to understand, now being done to the part noun occurred in specific embodiment of the present invention explained below:
Horizontal sweep: setting vertical ordinate, and for Derivative limit on the left or on the right, it can be achieved that left and right scans back and forth, rotation angle is 360 °；
Vertical scanning: setting horizontal abscissa, and high-low limit, it can be achieved that scan back and forth up and down, and rotation angle is from downward
90 ° rotate to upward 90 °；
Mixed sweep: it first carries out horizontal sweep and carries out vertical scanning again.
Below by specific embodiment, the technical solution of the utility model is described in further detail.
As shown in Figure 1, a kind of novel online scan-type ultrasonic gas leak detection system, including data processing controller, cloud
Platform and the ultrasonic receiver being mounted on the holder and laser ranging module, the holder, the ultrasonic receiver
It is connect with the data processing controller with the laser ranging module.
As shown in Fig. 2, the holder includes the upright bar 1 being arranged on the ground 2, the water that is fixed in the upright bar 1
Flat rotating base 3 is arranged in the vertical rotating stand 4 horizontally rotated on pedestal 3, described horizontally rotates pedestal for driving
The 3 horizontal drive motors rotated horizontally and the vertical driving motor for driving 4 vertical rotary of vertical rotating stand dynamic,
The ultrasonic receiver and the laser ranging module are built up in 4 two sides of vertical rotating stand, the horizontal drive respectively
Dynamic motor and the vertical driving motor pass through explosion-proof bobbin 5 respectively and connect with the data processing controller.
The data processing controller is by driving the horizontal drive motor and the vertical driving motor to control
The rotary scanning that holder realizes three-dimensional space is stated, specifically, the data processing controller controls the holder according to different
Path carries out rotary scanning, as horizontal sweep, vertical scanning, from coil to coil scanning, progressive scan, helical scanning, apple skin are swept
Retouch, mixed sweep or rosette scan, the path can by host computer according to the demand of different user or different scenes into
Row setting.
The ultrasonic receiver is used for real-time reception ultrasonic signal, and is uploaded to the number by analog to digital conversion circuit
According to processing controller.Preferably, the ultrasonic receiver selects the broadband ultrasonic receiver of U.S. SensComp company,
Its receiving sensitivity and frequency relation schematic diagram are as shown in figure 3, (gas leakage generates in 20KHz-100KHz frequency range
Ultrasonic signal frequency is generally in 20KHz-100KHz), receiving sensitivity decaying is less than 10dB.With traditional 40KHz resonance frequency
Ultrasonic receiver compare, leakage ultrasonic signal can be received in whole frequency range, richer leakage letter can be obtained
Number amplitude-frequency information is handled convenient for follow-up data.
Decay quickly when leaking the ultrasonic wave acoustic pressure very little generated since gas is faint, and propagating in air, so
Although the sensitivity of ultrasonic receiver is very high, the detection of remote faint leakage is still needed super to what is received
Acoustic signals amplify filtering.
So being additionally provided with signal amplification filtered electrical between the ultrasonic receiver and the data processing controller
Road, the signal amplification circuit filter include gain adjustable amplifying circuit and second order active bandwidth-limited circuit；The gain can
Amplifying circuit is adjusted to connect with the ultrasonic receiver, for carrying out gain amplification to the ultrasonic signal；The second order has
Source bandwidth-limited circuit is connect with the signal amplification circuit, for filtering out the noise jamming in the ultrasonic signal.
The gain adjustable amplifying circuit includes amplifier AD620 and digital regulation resistance AD5121, the amplifier AD620
It is a low cost, high-precision meter amplifier, it is only necessary to a non-essential resistance is arranged gain, gain ranging 1--10000,
Cooperate with the adjustable digital regulation resistance AD5121 of a 0-10K resistance value, 0-80dB signal amplification circuit can be formed；Specifically,
As shown in figure 4 ,+IN the pin of the amplifier AD620 and-IN pin are separately connected the output end of the ultrasonic receiver,
- IN the pin of the amplifier AD620 is also directly grounded；It is parallel between two RG pins of the amplifier AD620 described
Digital regulation resistance AD5121, the OUTPUT pin of the amplifier AD620 are connect with the second order active bandwidth-limited circuit, are used
In the amplified ultrasonic signal of output.N number of gain adjustable amplifying circuit is cascaded, that is, is combined into 0-80*n dB gain
Adjustable amplifying circuit signal.
As shown in figure 5, the second order active bandwidth-limited circuit includes low dissipation amplifier ADA4062, the low-power consumption
The OUTPUT that the positive input pin of amplifier ADA4062-A connects the amplifier AD620-A by resistance R1 with resistance R2 draws
The output pin of foot, the low dissipation amplifier ADA4062-A is directly connected to the negative input of low dissipation amplifier ADA4062-A
Pin, the output pin of the low dissipation amplifier ADA4062-A also pass through the capacitor C6 connection resistance R1 and the resistance
The junction of R2, the output pin of the low dissipation amplifier ADA4062-A also pass through capacitor C9 connected with capacitor C10 it is described low
The output pin of the positive input pin of power consumption amplifier ADA4062-B, the low dissipation amplifier ADA4062-B is directly connected to this
The output pin of the negative input pin of low dissipation amplifier ADA4062-B, the low dissipation amplifier ADA4062-B also passes through electricity
Resistance R3 connects the junction of the capacitor C9 and the capacitor C10, and the output pin of the low dissipation amplifier ADA4062-B connects
Analog-digital conversion circuit as described is connect, is exported for filtered ultrasonic signal will to be amplified to analog-digital conversion circuit as described progress mould
Number conversion.
Specifically, the laser ranging module includes laser emitter and laser pickoff, from laser emitter to leakage
Source direction emits a pulse laser, which beats after target object surface, and echo-signal is by laser pickoff
Capture.By laser emitter issue laser signal at the time of and laser pickoff capture echo at the time of between time difference
Source of leaks distance, formulae express can be calculated are as follows: L=C*T/2, L are source of leaks distance, and C is the light velocity, when T is above-mentioned two
The time difference at quarter.
The data processing controller is by the frequency data of maximum ultrasonic signal and amplitude data and the source of leaks
Distance substitutes into trained BP neural network model, calculates source of leaks pressure value and source of leaks leak hole diameter, and according to letting out
Drain-source pressure value and the estimated leakage rate of source of leaks leak hole diameter.
As shown in fig. 6, the neural network model is 5 layers of BP neural network model, first layer is input layer, the input
The neuron vector x of layer=it is { x1, x2, x3, wherein x1For the amplitude data of ultrasonic signal, x2For the frequency of ultrasonic signal
Data, x3For source of leaks distance；Second and third, four layers be middle layer, each middle layer has 4 nodes；Layer 5 is output
Layer, the output layer neuron vector o={ o1, o2, wherein o1For source of leaks pressure, o2For source of leaks leak hole diameter.
After obtaining source of leaks pressure by neural network model, according to source of leaks calculation of pressure gas flow rate V,
,
In formula, p1For source of leaks pressure, P is overpressure, P0For ambient air absolute pressure, T1For absolute temperature, σ is
P0/ P, R are gas constant,, to air, k=1.4, then K=2.646.
After calculating gas flow rate V, leakage rate is calculated according to the calculation formula of leakage rate, the calculation formula of leakage rate is V
* D, wherein D is source of leaks leak hole diameter.
In order to intuitively understand the working principle of the utility model, the utility model by taking holder carries out mixed sweep as an example,
The workflow of the utility model is described in detail:
The data processing controller controls the holder and carries out horizontal sweep, and the ultrasonic receiver is in the holder
During carrying out horizontal sweep, real-time reception ultrasonic signal is sent to the data processing controller；
The data processing controller is determined according to the maximum ultrasonic signal obtained in the PTZ level scanning process
The level orientation of source of leaks；
The data processing controller control holder carries out vertical scanning, the ultrasonic wave in the level orientation of source of leaks
For receiver during the holder carries out vertical scanning, real-time reception ultrasonic signal is sent to the data processing and control
Device；
The data processing controller is determined according to the maximum ultrasonic signal obtained during the holder vertical scanning
The vertical height of source of leaks, to determine source of leaks direction according to the level orientation of source of leaks and vertical height；
After determining source of leaks direction, the data processing controller controls the holder and adjusts to source of leaks direction, and controls
It makes the laser ranging module and carries out laser ranging, obtain source of leaks distance；
The data processing controller will carry out the frequency data and width of the maximum ultrasonic signal obtained in vertical scanning
Degree is accordingly and source of leaks distance substitutes into trained BP neural network model, calculates source of leaks pressure value and leakage
Source and drain bore dia, and according to source of leaks pressure value and the estimated leakage rate of source of leaks leak hole diameter.
The utility model can be suitable for the premature leak early warning of any compressed gas, leakage measurement and leakage point
Positioning, have is not influenced by factors such as harsh weather, wind direction, leak position and gas leakage diffusion dilutions, and it is passive not need
The advantages that waiting the aggregation of hazardous gas, it is good to be highly suitable for outdoor ventilation condition, and especially extreme environment tradition passes
Sensor is easy the Leakage inspection in the case where failure.
Finally it should be noted that: above embodiments are only to illustrate the technical solution of the utility model rather than limit it
System；Although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should
Understand: specific implementation of the utility model can still be modified or is equally replaced to some technical characteristics
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
In range.
Claims (7)
1. a kind of novel online scan-type ultrasonic gas leak detection system, it is characterised in that: including data processing controller, holder
And be mounted on ultrasonic receiver and laser ranging module on the holder, the holder, the ultrasonic receiver and
The laser ranging module is connect with the data processing controller；
The data processing controller controls the holder and realizes rotary scanning, and the ultrasonic receiver is rotated in the holder
Real-time reception ultrasonic signal is uploaded to the data processing controller in the process；
The data processing controller determines leakage according to the maximum ultrasonic signal obtained during the holder rotary scanning
Source direction controls the holder and rotates to source of leaks direction, and controls the laser ranging module and carry out laser ranging, is let out
Drain-source distance.
2. novel online scan-type ultrasonic gas leak detection system according to claim 1, it is characterised in that: the data
Processing controller controls the holder and carries out rotary scanning according to different paths.
3. novel online scan-type ultrasonic gas leak detection system according to claim 1 or 2, it is characterised in that: described
Holder include setting upright bar on the ground, be fixed in the upright bar horizontally rotate pedestal, setting horizontally rotates described
Vertical rotating stand on pedestal, for driving the horizontal drive motor for horizontally rotating pedestal horizontal rotation and for driving
Move the dynamic vertical driving motor of the vertical rotating stand vertical rotary, the ultrasonic receiver and the laser ranging module
Be built up in respectively horizontal drive motor described in the vertical rotating stand two sides and the vertical driving motor respectively with the number
It is connected according to processing controller.
4. novel online scan-type ultrasonic gas leak detection system according to claim 1 or 2, it is characterised in that: described
Signal amplification circuit filter and analog to digital conversion circuit, institute are additionally provided between ultrasonic receiver and the data processing controller
Stating signal amplification circuit filter includes gain adjustable amplifying circuit and second order active bandwidth-limited circuit；
The gain adjustable amplifying circuit is connect with the ultrasonic receiver, is put for carrying out gain to the ultrasonic signal
Greatly；
The second order active bandwidth-limited circuit is connect with the signal amplification circuit, for filtering out in the ultrasonic signal
Noise jamming.
5. novel online scan-type ultrasonic gas leak detection system according to claim 4, it is characterised in that: the gain
Adjustable amplifying circuit includes that+IN the pin of amplifier AD620 and digital regulation resistance AD5121, the amplifier AD620 and-IN draw
Foot is separately connected the output end of the ultrasonic receiver, and-IN the pin of the amplifier AD620 is also directly grounded；It is described to put
It is parallel with the digital regulation resistance AD5121 between two RG pins of big device AD620, the OUTPUT of the amplifier AD620 draws
Foot is connect with the second order active bandwidth-limited circuit, for exporting amplified ultrasonic signal.
6. novel online scan-type ultrasonic gas leak detection system according to claim 4, it is characterised in that: the second order
Active bandpass filiter circuit includes low dissipation amplifier ADA4062, the positive input pin of the low dissipation amplifier ADA4062-A
The OUTPUT pin of the amplifier AD620-A, the low dissipation amplifier ADA4062-A are connected with resistance R2 by resistance R1
Output pin be directly connected to the negative input pin of low dissipation amplifier ADA4062-A, the low dissipation amplifier
The output pin of ADA4062-A also passes through the junction that capacitor C6 connects the resistance R1 and the resistance R2, the low-power consumption
The output pin of amplifier ADA4062-A also passes through capacitor C9 and connects the low dissipation amplifier ADA4062-B's with capacitor C10
Positive input pin, the output pin of the low dissipation amplifier ADA4062-B are directly connected to low dissipation amplifier ADA4062-B
Negative input pin, the output pin of the low dissipation amplifier ADA4062-B also pass through the resistance R3 connection capacitor C9 and
The output pin of the junction of the capacitor C10, the low dissipation amplifier ADA4062-B connects analog-digital conversion circuit as described,
It exports for filtered ultrasonic signal will to be amplified to analog-digital conversion circuit as described progress analog-to-digital conversion.
7. novel online scan-type ultrasonic gas leak detection system according to claim 1 or 2, it is characterised in that: described
Ultrasonic receiver is broadband ultrasonic receiver.
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| CN201822257106.6U CN209416618U (en) | 2018-12-29 | 2018-12-29 | A kind of novel online scan-type ultrasonic gas leak detection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506848A (en) * | 2018-12-29 | 2019-03-22 | 汉威科技集团股份有限公司 | A kind of novel online scan-type ultrasonic gas leak detection system |
| CN112362749A (en) * | 2020-11-18 | 2021-02-12 | 筑友智造科技投资有限公司 | Leakage detection method, device and system for grouting joint filling |
| CN109506848B (en) * | 2018-12-29 | 2024-05-31 | 汉威科技集团股份有限公司 | Novel online scanning ultrasonic gas leakage detection system |
-
2018
- 2018-12-29 CN CN201822257106.6U patent/CN209416618U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506848A (en) * | 2018-12-29 | 2019-03-22 | 汉威科技集团股份有限公司 | A kind of novel online scan-type ultrasonic gas leak detection system |
| CN109506848B (en) * | 2018-12-29 | 2024-05-31 | 汉威科技集团股份有限公司 | Novel online scanning ultrasonic gas leakage detection system |
| CN112362749A (en) * | 2020-11-18 | 2021-02-12 | 筑友智造科技投资有限公司 | Leakage detection method, device and system for grouting joint filling |
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