CN102620783B - Image recognition-based electronic soap film gas flow meter - Google Patents
Image recognition-based electronic soap film gas flow meter Download PDFInfo
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- CN102620783B CN102620783B CN201210120988.6A CN201210120988A CN102620783B CN 102620783 B CN102620783 B CN 102620783B CN 201210120988 A CN201210120988 A CN 201210120988A CN 102620783 B CN102620783 B CN 102620783B
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- soap film
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Abstract
The invention relates to the technical field of gas flow measuring, in particular to an image recognition-based electronic soap film gas flow meter. The image recognition-based electronic soap film gas flow meter comprises a soap film automatic generation device, an image sensor and a computer program controlled image data acquisition circuit, and is characterized by comprising a soap film tube, a soap film recovery tube, a film breaking thermal needle device and an image sensor, wherein the soap film tube and the soap film recovery tube are connected by using a connecting rubber hose; the film breaking thermal needle is fixed above the soap film recovery tube; the image sensor is arranged on the surface of the soap film tube and is provided with an image data acquisition circuit; an air inlet is arranged between the lower part of the soap film tube and one end of the rubber hose; in a measuring state, the soap film automatic generation device is used for generating a soap film in the soap film tube through the air inlet; a signal is transmitted to the image data acquisition circuit by the image sensor; and soap film image data is acquired by the acquisition circuit. The conventional manual operation and manual calculation are substituted by the image recognition-based electronic soap film gas flow meter; manual error is avoided; the image sensor is matched with the image data acquisition circuit; and the instantaneous flow rate of a gas to be measured can be displayed at proper time.
Description
[technical field]
The present invention relates to gas flow measurement technical field, specifically a kind of electronics digital Bubble Flow-meter based on image recognition.
[background technology]
Tradition digital Bubble Flow-meter, measuring principle is that measuring and calculating soap-film or liquid level amass the time used through a segment body in glass tube, calculates gas flow.Wherein the producing method of soap-film is taked artificial manual squeezing latex balloon conventionally, if push improperly, likely produces multiple soap-films, and impact is observed, and therefore extrusion operation stability is not high manually; After soap-film produces, shift length is by manual observation, and accuracy is not high; Timing mode has hand to pinch the mode of stopwatch, also has and utilizes the mode that photoelectric sensor timing is installed, and the part of manual intervention occupies the majority in a word, not only time-consuming taking great energy, and measure and have personal error, the deficiency of its maximum is to be difficult to obtain the instantaneous delivery of gas.
[summary of the invention]
The object of the invention is to solve the deficiencies in the prior art, a kind of digital Bubble Flow-meter that can automatically produce soap-film, self-clocking, can measure instantaneous delivery is provided.
For achieving the above object, design a kind of electronics digital Bubble Flow-meter based on image recognition, comprise soap-film automatic generating apparatus, imageing sensor, the image data acquiring circuit of computer program control, it is characterized in that at least one soap-film pipe (1) is connected rubber hose (6) with a soap-film recovery tube (5) with one and is tightly connected, the hot needle device of rupture of membranes (4) is fixed on the top of soap-film recovery tube (5), the outer surface of soap-film pipe is provided with CIS imageing sensor (2), CIS imageing sensor (2) is provided with image data acquiring circuit, soap-film pipe (1) is taked the parallel assembling that is adjacent to CIS imageing sensor (2), between the bottom of soap-film pipe (1) and one end of rubber hose (6), be provided with air intake opening (3), under measuring state, soap-film automatic generating apparatus produces soap-film by air intake opening (3) in soap-film pipe inside, CIS imageing sensor (2) is transferred to image data acquiring circuit by signal, Acquisition Circuit gathers soap-film view data or blank image data, described soap-film position minimum resolution≤0.05mm, minimum volume resolution is 10uL, gas flow scope 0-60L/min, class of accuracy is 1, repeatability≤0.5, the speed of response is 100ms, described CIS imageing sensor is by the photoelectric sensing array of a platoon leader 216mm (5184 dot matrix), LED light source array and column lens array composition, CIS imageing sensor is by image data acquiring drives, image data acquiring circuit comprises high-speed a/d analog to digital converter, CPLD chip (LCMX0640), memory buffer (2 IS61C1024 chips), CIS imageing sensor is under the control of CPLD chip, the gray-scale value of each pixel is transmitted out (4MHz) with the form of analog voltage by serial-shift mode, to the electric signal of certain pixel in each pixel again after differential amplifier circuit carries out signal condition, by A/D converter by analog voltage converting digital amount, then under the control of CPLD chip, digital signal after conversion is temporarily existed in memory RAM, CPLD chip collects after piece image data, by soap-film image recognition algorithm software, identify the soap-film position data in image-region, according to the internal diameter of the travelling speed of soap-film and soap-film pipe, call the instantaneous delivery that tested gas instantaneous delivery calculating software module calculates tested gas, simultaneously by gas flow rate calibration software module according to the instantaneous delivery of tested gas, atmospheric pressure and environment temperature calculate the corrected flow rate of tested gas, by CPLD chip, be kept in memory RAM again.
Described image data acquiring circuit comprises at least one atmosphere pressure sensor and metering circuit, environment temperature sensor and metering circuit, with atmospheric pressure and the temperature of measurement environment.
The image data acquiring circuit of described computer program control, comprises that at least a set of soap-film image recognition algorithm software module, soap-film travelling speed software for calculation module, tested gas instantaneous delivery calculate software module, atmospheric pressure and environment temperature software algorithm module, gas flow rate calibration software module, show action pane software module and data output interface software module.
The hot needle device of described rupture of membranes adopts 100 ℃ of above special cermacis PTC heating materials to make.
The present invention has substituted Traditional Man operation, has manually calculated, and has avoided personal error; Imageing sensor coordinates with image data acquiring circuit, can show the instantaneous delivery of tested gas in good time; In addition, the present invention also provides and shows that action pane and data output interface can show easily data, be sent to host computer and enter to proofread and correct or countercharge.
[accompanying drawing explanation]
Fig. 1 is embodiment of the present invention structural representation;
Fig. 2 is image data acquiring processing flow chart of the present invention;
Hot needle device 5. soap-film recovery tube 6. rubber hose of 1. soap-film pipe 2.CIS imageing sensor 3. air intake opening 4. rupture of membranes in figure.
[embodiment]
The present invention will be further described by reference to the accompanying drawings, and the structure of this device can be realized for a person skilled in the art.
The present invention, in order to realize the automatic soap-film function of flowmeter, utilizes the automatic generation of soap-film and retracting device to replace Traditional Man and manually squeezes device; In order to realize computing machine, calculate deal with data, increased imageing sensor and image acquisition circuit, finally obtain example structure as shown in Figure 1:
A soap-film pipe 1 is connected the top that rubber hose 6 is tightly connected, the hot needle device 4 of rupture of membranes is fixed on soap-film recovery tube 5, the parallel assembling CIS imageing sensor 2 that is adjacent to of outer surface of soap-film pipe with one of a soap-film recovery tube 5 use, CIS imageing sensor 2 is provided with image data acquiring circuit, between the bottom of soap-film pipe 1 and one end of rubber hose 6, is provided with air intake opening 3.
The gas circuit input pipe that air intake opening 3 is connected is directly immersed in the inner appropriate location of soap lye, along with the outflow of gas will produce soap-film continuously, soap-film arrives soap-film pipe 1 top and enters soap-film recovery tube 5, by the hot needle device 4 of rupture of membranes, vanished, soap lye is back to the recycling of soap-film pipe bottom, and the hot needle device of rupture of membranes is to be made by 100 ℃ of above special cermacis PTC heating materials.
The whole process that soap-film is subjected to displacement is identified by CIS imageing sensor 2, and is transferred to computing in image data acquiring circuit, its concrete treatment scheme as shown in Figure 2:
Existence and the movement of CIS imageing sensor identification soap-film, CIS contact-type image sensor is by the photoelectric sensing array of a platoon leader 216mm (5184 dot matrix), LED light source array and column lens array composition, CIS imageing sensor is by image data acquiring drives, image data acquiring circuit is by high-speed a/d analog to digital converter (3 TLC5510), CPLD chip (LCMX0640), the compositions such as memory buffer (2 IS61C1024 chips), CIS imageing sensor is under the control of CPLD, the gray-scale value of each pixel is transmitted out (4MHz) with the form of analog voltage by serial-shift mode, to the electric signal of certain pixel in each pixel again after differential amplifier circuit carries out signal condition, by A/D converter by analog voltage converting digital amount, and then under the control of CPLD, digital signal after conversion is temporarily existed in memory RAM, CPLD collects after piece image data, by soap-film image recognition algorithm software, identify the soap bubble position data in image-region, according to the internal diameter of the travelling speed of soap-film and soap-film pipe, call the instantaneous delivery that tested gas instantaneous delivery calculating software module calculates tested gas, simultaneously by gas flow rate calibration software module according to the instantaneous delivery of tested gas, atmospheric pressure and environment temperature calculate the corrected flow rate of tested gas, by CPLD, be kept in memory RAM again.
In the present embodiment, CPU selects 8-bit High-Speed Microcontroller (GC89L591A0), and the high speed switch data address bus in CPLD chip makes CPLD chip and CPU shared storage RAM, and the soap-film position data being temporarily stored in memory RAM is read by CPU; In the present invention, adopt composed atmosphere pressure and the temperature-measuring modules such as atmospheric pressure sensor (MPXA6400A), temperature sensor (PT100), high-precision voltage reference source (REF024AU), amplifying circuit, 24 A/D analog to digital converters (ADS1247), atmospheric pressure sensor, the temperature sensor data of 24 A/D analog to digital converter generations have software for calculation to calculate current atmospheric pressure and temperature; Adopt 3.5 cun of very color touch display screens as the demonstration of flowmeter and window is set; Adopt the data output interface of RS232 communication port as flow measured data and instrument running status;
According to above-mentioned principle of work and technical scheme, the electronics digital Bubble Flow-meter based on image recognition of inventor's development, soap-film position minimum resolution≤0.05mm, minimum volume resolution is 10uL, gas flow scope 0-60L/min, class of accuracy is 1, repeatability≤0.5, and the speed of response is 100ms.
Concrete operation step is as follows:
1. completing soap-film produces and recovery operation
By air intake opening 3, input tested gas at the interior generation soap-film of the soap-film pipe 1 that has finite concentration soap lye, soap-film rises to exit and by film breaking unit 4, soap-film is punctured, soap-film falls in the soap-film recovery tube 5 of film breaking unit 4 belows, soap-film recovery tube 5 is tightly connected with the rubber hose 6 of below, rubber hose 6 is tightly connected with soap-film pipe 1, so far steeps liquid and gets back to again in product bubble soap lye.
2. complete the reading of soap-film flow, show, output and countercharge work
By CIS imageing sensor, read soap lye position, signal is transferred to control circuit board pre-procesor, shown in Fig. 2, chip carries out aftertreatment, and inner high speed computing completes demonstration, output and the countercharge work of gas flow.
Claims (4)
1. the electronics digital Bubble Flow-meter based on image recognition, comprise soap-film automatic generating apparatus, imageing sensor, the image data acquiring circuit of computer program control, it is characterized in that at least one soap-film pipe (1) is connected rubber hose (6) with a soap-film recovery tube (5) with one and is tightly connected, the hot needle device of rupture of membranes (4) is fixed on the top of soap-film recovery tube (5), the outer surface of soap-film pipe is provided with CIS imageing sensor (2), CIS imageing sensor (2) is provided with image data acquiring circuit, soap-film pipe (1) is taked the parallel assembling that is adjacent to CIS imageing sensor (2), between the bottom of soap-film pipe (1) and one end of rubber hose (6), be provided with air intake opening (3), under measuring state, soap-film automatic generating apparatus produces soap-film by air intake opening (3) in soap-film pipe inside, CIS imageing sensor (2) is transferred to image data acquiring circuit by signal, Acquisition Circuit gathers soap-film view data or blank image data, described soap-film position minimum resolution≤0.05mm, minimum volume resolution is 10uL, gas flow scope 0-60L/min, class of accuracy is 1, repeatability≤0.5, the speed of response is 100ms, described CIS imageing sensor is the photoelectric sensing array by a platoon leader 216mm, LED light source array and column lens array composition, CIS imageing sensor is by image data acquiring drives, image data acquiring circuit comprises high-speed a/d analog to digital converter, CPLD chip, memory buffer, CIS imageing sensor is under the control of CPLD chip, the gray-scale value of each pixel is transmitted out by serial-shift mode with the form of analog voltage, to the electric signal of certain pixel in each pixel again after differential amplifier circuit carries out signal condition, by A/D converter by analog voltage converting digital amount, then under the control of CPLD chip, digital signal after conversion is temporarily existed in memory RAM, CPLD chip collects after piece image data, by soap-film image recognition algorithm software, identify the soap-film position data in image-region, according to the internal diameter of the travelling speed of soap-film and soap-film pipe, call the instantaneous delivery that tested gas instantaneous delivery calculating software module calculates tested gas, simultaneously by gas flow rate calibration software module according to the instantaneous delivery of tested gas, atmospheric pressure and environment temperature calculate the corrected flow rate of tested gas, by CPLD chip, be kept in memory RAM again.
2. a kind of electronics digital Bubble Flow-meter based on image recognition as claimed in claim 1, it is characterized in that image data acquiring circuit comprises at least one atmosphere pressure sensor and metering circuit, environment temperature sensor and metering circuit, with atmospheric pressure and the temperature of measurement environment.
3. a kind of electronics digital Bubble Flow-meter based on image recognition as claimed in claim 1, it is characterized in that the image data acquiring circuit of computer program control, comprise that at least a set of soap-film image recognition algorithm software module, soap-film travelling speed software for calculation module, tested gas instantaneous delivery calculate software module, atmospheric pressure and environment temperature software algorithm module, gas flow rate calibration software module, show action pane software module and data output interface software module.
4. a kind of electronics digital Bubble Flow-meter based on image recognition as claimed in claim 1, is characterized in that the hot needle device of rupture of membranes adopts 100 ℃ of above special cermacis PTC heating materials to make.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210120988.6A CN102620783B (en) | 2012-04-23 | 2012-04-23 | Image recognition-based electronic soap film gas flow meter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210120988.6A CN102620783B (en) | 2012-04-23 | 2012-04-23 | Image recognition-based electronic soap film gas flow meter |
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| CN102620783B true CN102620783B (en) | 2014-04-23 |
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| DE102014102543A1 (en) * | 2014-02-26 | 2015-08-27 | Krones Ag | Apparatus and method for inspecting containers |
| CN103925957B (en) * | 2014-04-02 | 2017-08-08 | 新疆维吾尔自治区计量测试研究院 | One kind opens membrane type soap film flowmeter automatically |
| CN106768125B (en) * | 2017-02-08 | 2018-12-25 | 北京科技大学 | A kind of electronics soap film flowmeter steeped from movable property |
| CN106768100B (en) * | 2017-03-03 | 2019-01-01 | 北京科技大学 | A kind of the electronics soap film flowmeter and test method of automatic continuous wetting soap pipe |
| CN109410229A (en) * | 2018-08-27 | 2019-03-01 | 南京珂亥韧光电科技有限公司 | Multiple target lens position and male and fomale(M&F) know method for distinguishing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2187781Y (en) * | 1994-03-07 | 1995-01-18 | 李虹杰 | Intelligent electronic soap film type flowmeter |
| CN2767968Y (en) * | 2005-02-01 | 2006-03-29 | 王丕征 | Device for measuring soap film gas flow |
| CN101464169A (en) * | 2007-12-19 | 2009-06-24 | 王丕征 | Soap film flowmeter |
| CN201408034Y (en) * | 2009-05-15 | 2010-02-17 | 武汉铭为电子科技有限公司 | Membrane opening device of soap-membrane flowmeter |
| CN102147272A (en) * | 2009-11-25 | 2011-08-10 | 青岛恒远科技发展有限公司 | Soap film flowmeter |
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