Float flowmeter detection device for small visual imaging oxygen generator

Abstract

The invention belongs to the technical field of float flowmeter detection, and particularly relates to a float flowmeter detection device for a visual imaging small oxygenerator, which comprises a detection bin, a test board is fixed on the left side of the interior of the detection bin, a float flowmeter is arranged above the test board, a pressing cylinder is fixed on one side of the test board, and the pressing cylinder is fixed on the other side of the test board. The output end of the pressing air cylinder makes contact with the upper end of the float flowmeter and presses the float flowmeter. An air pressure valve is fixed to the left side of the upper portion of the detection bin, the lower portion of the float flowmeter is connected with an air inlet pipe, the air inlet pipe is connected with an external air source pipeline, the external air source pipeline is connected with the air pressure valve, the upper portion of the float flowmeter is connected with an exhaust pipe, and the air pressure valve is manually adjusted. In the prior art, the position of the floater is manually identified by naked eyes, the precision is poor, and the pressure on the upper side and the lower side of the floater cannot be kept constant, so that the test quality is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of float flowmeter detection, and in particular relates to a float flowmeter detection device for a visual imaging small oxygen concentrator. Background Art

[0002] ‌The measurement principle of the float flowmeter is based on the buoyancy of the float in the airflow. ‌ When the airflow flows from bottom to top through the tube of the float flowmeter, the float is subject to an upward buoyancy, which is proportional to the density of the airflow and the volume of the float. As the flow rate increases, the buoyancy of the float also increases, and the float rises. When the buoyancy of the float is balanced with its own gravity, the float will stabilize at a certain height. This height position directly reflects the flow rate of the current airflow. Therefore, by observing the position of the float, we can read the flow value and thus detect the float flowmeter. At present, the flow value of the float flowmeter is detected by observing the position scale of the float with the naked eye. This detection method has errors, and the pressure above and below the float is unstable. Affected by the friction of the float and the pressure above the float, the float position accuracy is poor, which greatly reduces the accuracy of the test. This phenomenon has become a problem that people in this field need to solve urgently. Summary of the invention

[0003] The object of the present invention is to provide a visual imaging float flowmeter detection device for a small oxygen concentrator to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a visual imaging float flowmeter detection device for a small oxygen concentrator, comprising a detection chamber, a test bench is fixed on the left side of the detection chamber, a float flowmeter is placed above the test bench, a clamping cylinder is fixed on one side of the test bench, the output end of the clamping cylinder contacts the upper end of the float flowmeter and clamps the float flowmeter; an air pressure valve is fixed on the left side above the detection chamber, an air intake pipe is connected below the float flowmeter, and the air intake pipe is connected to an external air source pipeline, and the pipeline is connected to the air pressure valve, an exhaust pipe is connected above the float flowmeter, the air pressure valve is manually adjusted, and a knob is connected to one side, the outer ring of the knob is provided with a dial for adjusting the air pressure by rotating the knob, a shaft rod is installed in the middle of the float flowmeter, and a float is slidably connected to the outer side of the shaft rod; a visual imager is fixed on the right side of the detection chamber, the visual imager is connected to a computer display screen, and a visual imaging system is provided in the computer display screen.

[0005] Preferably, the visual imaging system includes a pressure regulating module, an image recognition module, a visual imaging module and a computer computing module; the pressure regulating module and the image recognition module are both electrically connected to the visual imaging module, the visual imaging module is electrically connected to the computer computing module, the pressure regulating module is used to adjust the air pressure of the air pressure valve by rotating the knob, the image recognition module is used to photograph the float flowmeter through the visual imager, and transmit the image of the float flowmeter to the visual imaging module, the visual imaging module is used to perform visual imaging on the photographed float flowmeter, and compare the set scale value with the scale value presented by the image, so as to test the detection parameters of the float flowmeter, the visual imaging module is also used to present the rotation angle of the knob, and the computer computing module is used to calculate the detection parameters of the tested float flowmeter, so as to determine whether the float flowmeter is qualified.

[0006] Preferably, the pressure regulating module includes a temperature setting unit, a friction force measuring unit, a pressure regulating unit and an angle measuring unit; the temperature setting unit, the friction force measuring unit, the pressure regulating unit and the angle measuring unit are electrically connected to each other, the temperature setting unit is used to set the ambient temperature detected by the float flowmeter, the friction force measuring unit is used to measure the friction between the float and the shaft of the float flowmeter, the pressure regulating unit is used to calculate the pressure adjustment value of the air pressure valve according to the ambient temperature and the friction force, and the angle measuring unit is used to calculate the rotation angle of the knob according to the pressure adjustment value of the air pressure valve.

[0007] Preferably, the operation steps of the visual imaging system include: step S1, gas enters the float flowmeter through the air inlet pipe, and the air pressure valve adjusts the pressure of the gas; step S2, the ambient temperature detected by the float flowmeter is set by the temperature setting unit, and the change of the ambient temperature causes the pressure above the float to change, thereby adjusting the pressure value of the air pressure valve according to the ambient temperature; step S3, the friction between the float and the shaft of the float flowmeter is measured by the friction force measuring unit, the increased pressure value of the air pressure valve is calculated by the friction force, and the pressure value of the air pressure valve is adjusted once, and when the ambient temperature is greater than the system setting value, step S4 is entered, otherwise step S6 is entered; step S4, the high temperature leads to high pressure above the float, at this time the pressure value adjusted by the air pressure valve is large, the airflow enters from between the float and the shaft, the airflow between the shaft and the float is accelerated, and the friction is relatively reduced, thereby adjusting the air pressure valve The pressure value is adjusted twice; step S5, after the airflow passes through the shaft and the float and enters the top of the float, the pressure above the float is relatively increased, so that the pressure value above is increased, and then the pressure value of the air pressure valve is adjusted three times; step S6, according to the pressure value adjustment amount of the air pressure valve, and the rotation angle of the knob is presented by the visual imaging module, the knob is turned to adjust the pressure of the air pressure valve; step S7, the float flowmeter is photographed by the visual imaging device, and the image of the float flowmeter is transmitted to the visual imaging module, the visual imaging module performs visual imaging on the photographed float flowmeter, and compares the set scale value with the scale value presented by the image, so as to test the detection parameters of the float flowmeter, and then calculate whether the float flowmeter is qualified through the computer calculation module; step S8, the gas entering the float flowmeter is discharged through the exhaust pipe, and the detection work of the float flowmeter is completed.

[0008] Preferably, in step S2, , is the pressure value of the air pressure valve, is the maximum pressure value of the air pressure valve, is the detected ambient temperature, It is the highest ambient temperature on the inspection side; that is, when the ambient temperature is higher, the pressure above the float is greater, and the pressure value of the air pressure valve is adjusted higher, so that the pressure value of the air pressure valve is equal to the pressure value above the float.

[0009] Preferably, in step S3, the pressure value of the air pressure valve is adjusted once: ,Right now , is the friction between the float and the shaft, is the maximum friction between the float and the shaft, The air valve pressure value increased by the friction between the float and the shaft. It is the pressure value of the air pressure valve after one adjustment.

[0010] Preferably, in step S3 and step S4: hour, The ambient temperature set for the system: At this time, the ambient temperature is high, so the pressure value of the air pressure valve is adjusted twice, that is, , , The friction force reduced when the gas passes through the shaft and the float. is the flow rate of gas passing between the shaft and the float, is the fastest flow rate of gas passing through the shaft and the float; that is, the gas flow rate between the shaft and the float makes the pressure value of the air pressure valve relatively lower; when hour: .

[0011] Preferably, in step S3, step S4 and step S5: hour: , It is the air pressure after the gas passes through the space between the shaft and the float and enters the top of the float. is the pressure value after the air pressure valve is adjusted three times, where: ; That is, the increase in air pressure above the float is proportional to the flow rate of gas passing between the float and the shaft; when hour: .

[0012] Preferably, in step S6: When: The knob rotates through To calculate; when When: The knob rotates through Make calculations.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention uses a visual imaging system to perform imaging, thereby detecting the float flowmeter, the detection process is automated, the operation is convenient and efficient, and compared with traditional manual identification, the scale position accuracy of the float is higher through imaging identification, the detection accuracy is high and the detection quality is high, and the rotation angle of the knob is intelligently measured, so that the pressure above and below the float can be kept constant, so that the float remains stable, when the position of the float movement is not at the scale position set by the system, it indicates that the float flowmeter is defective and is a defective product, and for high temperature, the pressure of the air pressure valve is increased, and vice versa, the pressure of the air pressure valve is reduced, so that the small oxygen generator can be simulated in a high temperature environment, the simulation quality is improved, the detection quality is enhanced, and the detection accuracy is improved, and the friction between the shaft rod and the float generates resistance when the float rises, and at this time, by further increasing the pressure of the air pressure valve, the thrust of the float is strengthened, and the position accuracy of the float after movement can be further improved, and the detection accuracy of the float flowmeter can be further improved; When the temperature rises, the pressure adjustment of the air pressure valve is large, which increases the air pressure emitted by the float, and the flow rate of the gas through the shaft and the float is accelerated, thereby relatively reducing the friction between the two, and the resistance of the float to rise is reduced. At this time, by reducing the pressure of the air pressure valve, it is possible to avoid excessive pressure at the bottom of the float causing inaccurate test data, thereby improving the accuracy of the float flowmeter detection and ensuring the stability of the air pressure above and below the float. At the same time, the pressure at the bottom of the float is high, and the flow rate of the gas through the float and the shaft is high, which makes the pressure above the float relatively increased. At this time, further increasing the pressure value of the air pressure valve will increase the pressure below the float, thereby ensuring the stability of the air pressure above and below the float, and the detected float flowmeter data is more accurate, and the detection quality is greatly enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the detection chamber of the present invention; Figure 3 It is a schematic diagram of the pipeline connection mode between the float flowmeter and the air pressure valve of the present invention; Figure 4 is a plan view of a float flowmeter of the present invention; Figure 5 is a schematic diagram of the module connection relationship of the visual imaging system of the present invention; In the figure: 1. inspection chamber; 11. test bench; 12. clamping cylinder; 13. air pressure valve; 131. knob; 14. air intake pipe; 15. exhaust pipe; 16. visual imager. DETAILED DESCRIPTION

[0015] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1-5 The present invention provides a technical solution: a float flowmeter detection device for a visual imaging small oxygen concentrator, comprising a detection chamber 1, a test bench 11 is fixed on the left side of the detection chamber 1, a float flowmeter is placed above the test bench 11, a pressing cylinder 12 is fixed on one side of the test bench 11, and the output end of the pressing cylinder 12 contacts the upper end of the float flowmeter and presses the float flowmeter; An air pressure valve 13 is fixed on the upper left side of the detection chamber 1, an air inlet pipe 14 is connected to the lower part of the float flowmeter, and the air inlet pipe 14 is connected to the external air source pipeline, and the pipeline is connected to the air pressure valve 13, an exhaust pipe 15 is connected to the upper part of the float flowmeter, the air pressure valve 13 is manually adjusted, and a knob 131 is connected to one side, and a dial is provided on the outer ring of the knob 131 for adjusting the air pressure by rotating the knob 131, and a shaft rod is installed in the middle of the inner part of the float flowmeter, and a float is slidably connected to the outer side of the shaft rod; A visual imager 16 is fixed on the right side of the interior of the inspection chamber 1, and the visual imager 16 is connected to a computer display screen, and a visual imaging system is arranged in the computer display screen; The gas enters the float flowmeter through the air inlet pipe 14, and the air pressure valve 13 adjusts the gas pressure. After the gas enters the float flowmeter, the air pressure pushes the float to slide upward along the inner wall of the float flowmeter and slide along the shaft rod at the same time. At the same time, the float is kept stable by its own weight, and the pressure above the float exerts resistance on the float. After the float is stable, the float flowmeter is photographed by the visual imager 16 and transmitted to the computer display screen. The image is formed by the visual imaging system, so as to detect the float flowmeter. The detection process is automated, the operation is convenient and efficient, and compared with traditional manual identification, the scale position accuracy of the float is higher through imaging identification, and the detection accuracy and quality are high.

[0017] The visual imaging system includes a pressure regulating module, an image recognition module, a visual imaging module and a computer calculation module; The pressure regulating module and the image recognition module are both electrically connected to the visual imaging module, and the visual imaging module is electrically connected to the computer computing module. The pressure regulating module is used to adjust the air pressure of the air pressure valve 13 by rotating the knob 131. The image recognition module is used to photograph the float flowmeter through the visual imager 16, and transmit the image of the float flowmeter to the visual imaging module. The visual imaging module is used to perform visual imaging on the photographed float flowmeter, and compare the set scale value with the scale value presented by the image, so as to test the detection parameters of the float flowmeter. The visual imaging module is also used to present the rotation angle of the knob 131. The computer computing module is used to calculate the detection parameters of the tested float flowmeter, so as to determine whether the float flowmeter is qualified. The pressure regulating module and the image recognition module are both electrically connected to the visual imaging module. The pressure regulating module is used to adjust the air pressure of the air pressure valve 13 by rotating the knob 131. The image recognition module is used to photograph the float flowmeter through the visual imager 16 and transmit the image of the float flowmeter to the visual imaging module. The visual imaging module is used to perform visual imaging on the photographed float flowmeter and compare the set scale value with the scale value presented by the image to test the detection parameters of the float flowmeter. The visual imaging module is also used to present the rotation angle of the knob 131.

[0018] The pressure regulating module includes a temperature setting unit, a friction force measuring unit, a pressure regulating unit and an angle measuring unit; The temperature setting unit, the friction force measuring unit, the pressure regulating unit and the angle measuring unit are electrically connected to each other. The temperature setting unit is used to set the ambient temperature detected by the float flowmeter. The friction force measuring unit is used to measure the friction between the float and the shaft of the float flowmeter. The pressure regulating unit is used to calculate the pressure adjustment value of the air pressure valve 13 according to the ambient temperature and the friction force. The angle measuring unit is used to calculate the rotation angle of the knob 131 according to the pressure adjustment value of the air pressure valve 13.

[0019] The operation steps of the visual imaging system include: Step S1, gas enters the float flowmeter through the air inlet pipe 14, and the air pressure valve 13 adjusts the pressure of the gas; Step S2, setting the ambient temperature detected by the float flowmeter through the temperature setting unit, the change of the ambient temperature causes the pressure above the float to change, thereby adjusting the pressure value of the air pressure valve 13 according to the ambient temperature; Step S3, the friction force between the float and the shaft of the float flowmeter is measured by the friction force measuring unit, the increased pressure value of the air pressure valve 13 is measured by the friction force, and the pressure value of the air pressure valve 13 is adjusted once. When the ambient temperature is greater than the system set value, step S4 is entered, otherwise step S6 is entered; Step S4, the high temperature leads to high pressure above the float. At this time, the pressure value adjusted by the air pressure valve 13 is large, and the air flow enters the float from between the float and the shaft rod. The air flow between the shaft rod and the float is accelerated, and the friction is relatively reduced, thereby performing a secondary adjustment on the pressure value of the air pressure valve 13; Step S5, after the airflow passes through the space between the shaft and the float and enters the upper part of the float, the pressure above the float is relatively increased, so that the upper pressure value increases, and then the pressure value of the air pressure valve 13 is adjusted three times; Step S6, adjusting the pressure value of the air pressure valve 13 according to the amount, and presenting the rotation angle of the knob 131 through the visual imaging module, rotating the knob 131 to adjust the pressure of the air pressure valve 13; Step S7, photographing the float flowmeter through the visual imaging device 16, and transmitting the image of the float flowmeter to the visual imaging module, the visual imaging module visually images the photographed float flowmeter, and compares the set scale value with the scale value presented by the image, so as to test the detection parameters of the float flowmeter, and then calculate whether the float flowmeter is qualified through the computer calculation module; Step S8: The gas entering the float flowmeter is discharged through the exhaust pipe 15, and the detection work of the float flowmeter is completed.

[0020] In step S2, , is the pressure value of the air pressure valve 13, is the maximum pressure value of the air pressure valve 13, is the detected ambient temperature, is the maximum ambient temperature of the inspection side; That is, when the ambient temperature is higher, the pressure above the float is greater, and the pressure value of the air pressure valve 13 is adjusted higher, so that the pressure value of the air pressure valve 13 is equal to the pressure value above the float; The pressure above and below the float can be kept constant, so that the float remains stable. When the position of the float movement is not at the scale position set by the system, it means that the float flowmeter is defective and is a defective product. If the temperature is high, the pressure of the air pressure valve 13 is increased, otherwise the pressure of the air pressure valve 13 is reduced. This can simulate the small oxygen concentrator in a high temperature environment, improve the simulation quality, enhance the detection quality, and improve the detection accuracy.

[0021] In step S3, the pressure value of the air pressure valve 13 is adjusted once: ,Right now , is the friction between the float and the shaft, is the maximum friction between the float and the shaft, The pressure value of the air pressure valve 13 increased by the friction between the float and the shaft, is the pressure value of the air pressure valve 13 after one adjustment; The friction between the shaft and the float creates resistance when the float rises. At this time, by further increasing the pressure of the air pressure valve 13, the thrust on the float is strengthened, which can further improve the position accuracy of the float after movement and further improve the detection accuracy of the float flowmeter.

[0022] In step S3 and step S4: when hour, The ambient temperature set for the system: At this time, the ambient temperature is high, so the pressure value of the air pressure valve 13 is adjusted twice, that is, , , The friction force reduced when the gas passes through the shaft and the float. is the flow rate of gas passing between the shaft and the float, It is the fastest flow rate of gas passing between the shaft and the float; That is, the gas flow rate between the shaft and the float causes the pressure value of the air pressure valve 13 to be relatively reduced; when hour: ; When the temperature rises, the pressure of the air pressure valve 13 is adjusted to a large value, which increases the air pressure emitted by the float, and accelerates the flow rate of the gas through the shaft and the float, thereby relatively reducing the friction between the two, and reducing the resistance of the float to rise. At this time, by reducing the pressure of the air pressure valve 13, it is possible to avoid excessive pressure at the bottom of the float causing inaccurate test data, thereby improving the accuracy of the float flowmeter and ensuring the stability of the air pressure above and below the float.

[0023] In step S3, step S4 and step S5: when hour: , It is the air pressure after the gas passes through the space between the shaft and the float and enters the top of the float. is the pressure value after the air pressure valve 13 is adjusted three times, where ; That is, the increase in air pressure above the float is proportional to the flow rate of gas through the float and the shaft; when hour: ; When the ambient temperature rises, the pressure at the bottom of the float is high, and the flow rate of the gas through the float and the shaft is high, which makes the pressure above the float relatively increase. At this time, the pressure value of the air pressure valve 13 is further increased, so that the pressure below the float also increases, thereby ensuring the stability of the air pressure above and below the float, and the detected float flowmeter data is more accurate, and the detection quality is greatly enhanced.

[0024] In step S6: when When: the rotation angle of the knob 131 passes Carry out calculations; when When: the rotation angle of the knob 131 passes Carry out calculations; Regardless of the temperature of the detection environment, the float flowmeter can be detected with high precision, thereby improving the detection accuracy.

[0025] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0026] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A visual imaging float flowmeter detection device for a small oxygen concentrator, comprising a detection chamber (1), characterized in that: A test bench (11) is fixed on the left side of the interior of the detection chamber (1), a float flow meter is placed above the test bench (11), and a pressing cylinder (12) is fixed on one side of the test bench (11), the output end of the pressing cylinder (12) contacts the upper end of the float flow meter and presses the float flow meter; A pressure valve (13) is fixed on the upper left side of the detection chamber (1); an air inlet pipe (14) is connected to the lower side of the float flowmeter, and the air inlet pipe (14) is connected to an external air source pipeline, and the pipeline is connected to the pressure valve (13); an exhaust pipe (15) is connected to the upper side of the float flowmeter; the pressure valve (13) is manually adjustable, and a knob (131) is connected to one side; a dial is provided on the outer ring of the knob (131) for adjusting the air pressure by rotating the knob (131); a shaft is installed in the middle of the float flowmeter, and a float is slidably connected to the outer side of the shaft; A visual imager (16) is fixed on the right side of the interior of the detection chamber (1), the visual imager (16) is connected to a computer display screen, and a visual imaging system is arranged in the computer display screen.

2. According to claim 1, a float flowmeter detection device for a small-scale oxygen concentrator with visual imaging, characterized in that: The visual imaging system includes a pressure adjustment module, an image recognition module, a visual imaging module and a computer calculation module; The pressure regulating module and the image recognition module are both electrically connected to the visual imaging module, and the visual imaging module is electrically connected to the computer calculation module. The pressure regulating module is used to adjust the air pressure of the air pressure valve (13) by rotating the knob (131). The image recognition module is used to photograph the float flowmeter through the visual imaging device (16) and transmit the image of the float flowmeter to the visual imaging module. The visual imaging module is used to perform visual imaging on the photographed float flowmeter and compare the set scale value with the scale value presented by the image, thereby testing the detection parameters of the float flowmeter. The visual imaging module is also used to present the rotation angle of the knob (131). The computer calculation module is used to calculate the detection parameters of the tested float flowmeter, thereby judging whether the float flowmeter is qualified.

3. According to claim 2, a float flowmeter detection device for a small-scale oxygen concentrator with visual imaging, characterized in that: The pressure regulating module includes a temperature setting unit, a friction force measuring unit, a pressure regulating unit and an angle measuring unit; The temperature setting unit, the friction force measuring unit, the pressure regulating unit and the angle measuring unit are electrically connected to each other; the temperature setting unit is used to set the ambient temperature detected by the float flowmeter; the friction force measuring unit is used to measure the friction between the float and the shaft of the float flowmeter; the pressure regulating unit is used to measure the pressure regulating value of the air pressure valve (13) according to the ambient temperature and the friction force; and the angle measuring unit is used to measure the rotation angle of the knob (131) according to the pressure regulating value of the air pressure valve (13).

4. According to claim 3, a float flowmeter detection device for a small-scale oxygen concentrator with visual imaging, characterized in that: The operation steps of the visual imaging system include: Step S1, gas enters the float flowmeter through the air inlet pipe (14), and the air pressure valve (13) adjusts the pressure of the gas; Step S2, setting the ambient temperature detected by the float flowmeter through the temperature setting unit, so that the pressure above the float changes due to the change of the ambient temperature, thereby adjusting the pressure value of the air pressure valve (13) according to the ambient temperature; Step S3, measuring the friction between the float and the shaft of the float flowmeter by means of a friction force measuring unit, measuring the increased pressure value of the air pressure valve (13) by means of the friction force, adjusting the pressure value of the air pressure valve (13), and entering step S4 when the ambient temperature is greater than the system set value, otherwise entering step S6; Step S4, the high temperature leads to a high pressure above the float. At this time, the pressure value adjusted by the air pressure valve (13) is large, and the air flow enters the float from between the float and the shaft rod. The air flow between the shaft rod and the float is accelerated, and the friction is relatively reduced, thereby performing a secondary adjustment on the pressure value of the air pressure valve (13); Step S5, after the airflow passes through the space between the shaft and the float and enters the upper part of the float, the pressure above the float is relatively increased, so that the upper pressure value increases, and then the pressure value of the air pressure valve (13) is adjusted three times; Step S6, adjusting the amount according to the pressure value of the air pressure valve (13), and presenting the rotation angle of the knob (131) through the visual imaging module, and rotating the knob (131) to adjust the pressure of the air pressure valve (13); Step S7, photographing the float flowmeter through the visual imaging device (16), and transmitting the image of the float flowmeter to the visual imaging module, the visual imaging module visually images the photographed float flowmeter, and compares the set scale value with the scale value presented by the image, thereby testing the detection parameters of the float flowmeter, and then calculating whether the float flowmeter is qualified through the computer calculation module; Step S8: The gas entering the float flowmeter is discharged through the exhaust pipe (15), thereby completing the detection work of the float flowmeter.

5. According to claim 4, a float flowmeter detection device for a small-scale oxygen concentrator with visual imaging is characterized in that: In the step S2, , is the pressure value of the air pressure valve (13), is the maximum pressure value of the air pressure valve (13), is the detected ambient temperature, is the maximum ambient temperature of the inspection side; That is, when the ambient temperature is higher, the pressure above the float is greater, and the pressure value of the air pressure valve (13) is adjusted higher, so that the pressure value of the air pressure valve (13) is equal to the pressure value above the float.

6. A visual imaging float flowmeter detection device for a small oxygen concentrator according to claim 5, characterized in that: In step S3, the pressure value of the air pressure valve (13) is adjusted once: ,Right now , is the friction between the float and the shaft, is the maximum friction between the float and the shaft, The pressure value of the air pressure valve (13) increased by the friction between the float and the shaft, is the pressure value of the air pressure valve (13) after the first adjustment.

7. A float flowmeter detection device for a small-scale oxygen concentrator with visual imaging according to claim 6, characterized in that: In the steps S3 and S4: when hour, The ambient temperature is set for the system: At this time, the ambient temperature is high, so the pressure value of the air pressure valve (13) is adjusted twice, that is, , , The friction force reduced when the gas passes through the shaft and the float. is the flow rate of gas passing between the shaft and the float, It is the fastest flow rate of gas passing between the shaft and the float; That is, the gas flow rate between the shaft and the float causes the pressure value of the air pressure valve (13) to be relatively reduced; when hour: .

8. The visual imaging float flowmeter detection device for a small oxygen concentrator according to claim 7 is characterized in that: In the steps S3, S4 and S5: when hour: , It is the air pressure after the gas passes through the space between the shaft and the float and enters the top of the float. is the pressure value after the air pressure valve (13) is adjusted three times, where: ; That is, the increase in air pressure above the float is proportional to the flow rate of gas through the float and the shaft; when hour: .

9. A visual imaging float flowmeter detection device for a small oxygen concentrator according to claim 8, characterized in that: In step S6: when When: the rotation angle of the knob (131) is Carry out calculations; when When: the rotation angle of the knob (131) is Carry out calculation.

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