Capacitor air tightness detection method
Current Statues and Future Development of Air Tightness Detection Technique[J].Machine tools and hydraulic pressure, 2008,36(11): 172-174． Research and Design of Air Leak Testing System Jan 2008 - Download [PDF]
Application of Weighted Fusion Algorithm in Air Tightness Detection …
Current Statues and Future Development of Air Tightness Detection Technique[J].Machine tools and hydraulic pressure, 2008,36(11): 172-174． Research and Design of Air Leak Testing System Jan 2008
Air Leak Test Methods and How They Work
The flow method measures flow rates of air, nitrogen, etc. through the test specimen. Depending on the flow size, it can be a leak rate or a flow measurement of gases. Flow measurement is one of the fastest air leak test methods (cycle times < 2 sec possible). The flow-through method is used when a test part''s continuity must be checked for ...
Acoustic methods for leak detection and tightness testing
Air tightness testing has importance in industrial environments where in compressed air systems leaks account for a high percentage of energy loss. ... M., & Probst, C. (2016). Acoustic methods for leak detection and tightness testing. 19th World Conference on Non-Destructive Testing (WCNDT 2016), 13-17 June 2016 in Munich, Germany. e-Journal ...
An Ultrasonic-Based Detection of Air-Leakage for the Unclosed ...
It is an effective method of detecting the air-leakage of unclosed components at the aircraft assembly stage reducing the testing time, energy consumption, and cost for the air-leakage detection ...
Airtight monitoring
Airtight monitoring. The traditional test piece tightness (also known as leakage) is the use of water immersion or oil immersion visual bubble method, its equipment is simple, the results are intuitive, but the detection accuracy and efficiency are low, the influence of human factors is large, can not achieve automatic quantitative leak detection, at the same time will also bring …
TBK 207 Air Tightness Detector Built-in Vacuum Pump Phone …
TBK 207 Intelligent Air Portable Tightness Detector with Built-in Vacuum Pump for Mobile Phone Screen Repair Automatic Air Tightness Tester.Features: TBK-207 intelligent air tightness detector, lightweight and portable, multi-purpose, easy to use, multi-brand testable pressure limit. In addition to the mini, the performance is also very strong.
A Rail Fastener Tightness Detection Approach Using Multi
Sensors 2020, 20, 1367 3 of 22 limitation of the three‐dimensional information loss in the two‐dimensional image restricts the further development of the detection technology.
Air Tightness Test System for Electric Pneumatic Valve Based on ...
The paper designs an air tightness test system of electric pneumatic valves based on differential pressure method using MSP430 as controlling core and proves that this system can realize quantitative description based on qualitative description for testing leakage rate. Air tightness test is a necessary step in the performance test of electric pneumatic valves.
Air-tightness test device and method
Air tightness detection system and method CN112213054A (en) * 2020-09-29: 2021-01-12 ... Explosion-proof pressure test device for air pressure on capacitor case CN107340101B (en) 2020-09-11: Gas micro-leakage detection device and method for sealing device CN101424581B ...
Capacitance air tightness detection device
The utility model solves the problem of air tightness detection of small-scale production or single capacitor, improves the detection precision, reduces the operation difficulty,...
On-line air-tightness and insertion loss simultaneous detection method ...
The high air-tightness multicore fiber optic penetration connector is a core component for the optical fiber sensing and communication technologies applied in the space environment simulator under the vacuum thermal environment. High air-tightness and insertion loss are the two key indexes of the fiber optic penetration connector. The air-tightness and insertion loss on-line …
A Rail Fastener Tightness Detection Approach Using Multi …
The automatic detection method of rail fastener tightness proposed in this paper is used to analyze the multi-source data collected by the vehicle-mounted equipment. The results of the field test are on a 10-km test line with about 30,000 fasteners, of which 200 anomalies were manually designed as ground truth including 150 bolts loosening and ...
CN106644299A
The air-tightness detection method of airship envelope is one of key technology of guarantee dirigible normal operation.Traditional flies Ship air bag air-tightness detection method is pressure change leak detecting, including voltage drop detection method and pressure differential detection method.They are all resonable On the basis of thinking the gas equation …
(PDF) Study on Gas Leakage Detection and Pressure Difference ...
This paper introduces the common air tightness detection contents, and models the inflation and detection process of the differential pressure method. ... and accurate air tightness detection, but ...
Regression Method for Rail Fastener Tightness Based on Center …
In the railway system, fasteners have the functions of damping, maintaining the track distance, and adjusting the track level. Therefore, routine maintenance and inspection of fasteners are important to ensure the safe operation of track lines. Currently, assessment methods for fastener tightness include manual observation, acoustic wave detection, and …
Acoustic methods for leak detection and tightness testing
Air tightness testing has importance in industrial environments where in compressed air systems leaks account for a high percentage of energy loss. These losses can effectively be reduced by locating and repairing of leaks. Furthermore, tightness is a criterion for the quality of different kinds of seals and joints. For leak detection and tightness testing acoustic methods …
A Mechanism and Method of Leak Detection for ...
An improved pressure vessel air-tightness test mechanism is developed to provide the basic support for leak detection framework and improve test efficiency. Usually, it is subjective, laborious, and inefficient about the traditional water-based air-tightness test. In this article, a mechanism and method of leak detection for a pressure vessel is proposed. First, …
Application of Weighted Fusion Algorithm in Air Tightness Detection ...
Application of Weighted Fusion Algorithm in Air Tightness Detection Device. Yang Liu 1, Jie Gao 1 and Linggai Zhang 1. Published under licence by IOP Publishing Ltd ... The method is applied to leak detection of tracer gas, with high detection accuracy and wide range to meet production demand.
An assembly tightness detection method for bolt-jointed rotor with ...
The assembly tightness detection methods mentioned above mainly focused on whether bolt looseness fault occurs in bolt-jointed rotor system but ignores the effect of assembly tightness degree on rotor vibration. ... ASME Turbo Expo, Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2010 (2010), pp. 389-398. View in Scopus ...
Modeling of Thermoacoustic Frequency Characteristics for the Air ...
The limitation of this method of detection of the air-tightness, caused by the thermoacoustic signal of the air-tight packaging, is also discussed. Similar content being viewed by others Efficiency of the Method of Aspiration Capacitor for the Verification and Calibration of Instruments Aimed at Measuring the Electric Conductivity of Air
Application of Weighted Fusion Algorithm in Air Tightness Detection ...
The method is applied to leak detection of tracer gas, with high detection accuracy and wide range to meet production demand. ... Application of Weighted Fusion Algorithm in Air Tightness Detection Device @article{Liu2019ApplicationOW, title={Application of Weighted Fusion Algorithm in Air Tightness Detection Device}, author={Yang Liu and Jie ...
Air tightness detection method in parallel for aerospace: …
To address the problems of high cost, complex operation, and low efficiency of existing equipment for aerospace, a simple but efficient multichannel air tightness detection …
Air-tightness test device and method | Semantic Scholar
The invention discloses an air-tightness test device and an air-tightness test method. The air-tightness test device comprises an air-tightness test unit, a pneumatic unit and a control unit, wherein the air-tightness test unit is provided with a seal cavity; the pneumatic unit comprises an air source and a sensor; and the control unit calculates the variation quantity of …
7 Methods of Refrigerant Leak Detection
7 Methods of Refrigerant Leak Detection We could detect a refrigerant leak in 7 below ways: 1. Visual Inspection If you find somewhere in the system with oil traces, probably that is the leakage point. This inspection method can''t position precisely because the leakage point is usually very tiny and many parts of the refrigeration
CN107449563A
The invention discloses super capacitor air tight test device and the method for inspection, including support, housing, chassis, first conveyer belt and controller, the motion bar being...
Nano-fiber based self-powered flexible vibration sensor for rail ...
At present, the tightness safety detection methods of rail fasteners mainly include manual detection [2] and computer vision detection [3]. ... it can achieve peak power density of 4.28 W m −2 and can charge a variety of commercial capacitors. In addition, the sensor also exhibits excellent working stability, good environmental adaptability ...
Air tightness detector
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Air tightness detection method in parallel for aerospace: …
Air tightness detection method in parallel for aerospace: mechanical design, system modeling and optimum control. Bo Yang 1,2, Jianhui Yuan 1, Xiaoliang Wang 1, Jianwei Zhang 1, Wei Wu 3 and Mingyang Xie 3. Published under licence by IOP Publishing Ltd
High-fidelity Numerical Study on Air-tightness Detection System of ...
Planning an automatic detection system of the air tightness of medicine box is very necessary for growing demand for storage of pharmaceutical products.
Fast plug-in capacitors polarity detection with morphology and …
Lin et al. [] proposed a method for detecting the existence of capacitors on PCB using the YOLO algorithm.The recognition time of a single component can be as long as 294 milliseconds (219–710ms). Susa et al. [] proposed a method to detect the capacitor on the circuit board using YOLO V3. with the accuracy of (93.33%).Fan et al. [] proposed a three-stage …
How to Choose a Leak Detection Method
In helium sniffer leak detection, the test object is filled with helium overpressure [27], Figure 3.The sniffer sensor is then guided along the joint seam to determine the local leakage rate [28]. ...
Gas Leakage Detection and Pressure Difference Identification by ...
Currently, the measurement methods for pneumatic system leakage include bubbling, ultrasonic, and pressure detection methods. These methods are sensitive to high-precision sensors, long detection times, and stable external environments. The traditional differential pressure method involves severe differential pressure fluctuations caused by …
Airtightness-measurements and measurement methods
The principle of the pressure method is that a powerful fan is employed to create a pressure difference across the building envelope (walls, roof, floor structures etc.), and the resulting air flow through the fan is measured at constant pressure difference. 2.1.1 Tracer gas method The tracer gas method can be used to measure the amount of
Assembly tightness detection of bolt connections using gray-level ...
J. C. Zhang, X. N. Yang and J. Wang, On-line air-tightness and insertion loss simultaneous detection method of high air-tightness fiber optic penetration connector, 2015 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, Beijing, China (2015). S. M. Y. Nikravesh and M. Goudarzi, A review paper on …
Modeling of Thermoacoustic Frequency Characteristics for the Air ...
The limitation of this method of detection of the air-tightness, caused by the thermoacoustic signal of the air-tight packaging, is also discussed. This paper is a description …
CN106768700A
A kind of capacitor air-tightness detection method, the detection means that the method is used includes source of the gas, flowmeter and places the hermetically sealed can of measured...
An Ultrasonic-Based Detection of Air-Leakage for the Unclosed ...
An ultrasonic-based detection method is proposed and designed to detect the air-leakage of unclosed components for aircraft reducing the testing time, energy consumption, and cost for theAir-Leakage detection in the final assembly stage of large aircraft. Air-leakage detection is among the most important processes at the assembly stage of unclosed …