507results about How to "High detection sensitivity" patented technology

Display device

A highly reliable electrostatic-capacitive-type display device with a touch panel which allows a user to perform finger touch inputting and exhibits excellent detection sensitivity is provided. A transparent conductive film is formed above a back surface of an electrostatic-capacitive-type touch panel so as to block noises generated by a display device. A conductive member is provided to supply a voltage to a transparent conductive film formed above a back surface of the touch panel. An electrode which is formed on the electrostatic-capacitive-type touch panel is divided in accordance with a ratio between the number of X electrodes and the number of Y electrodes. A floating electrode is formed in a gap defined between the electrodes so as to adjust an area of the electrode. Due to the shrinkage of the area of the electrode, it is possible to lower a noise level to a level equal to or lower than a signal level. Accordingly, an S/N ratio is increased thus enhancing detection sensitivity. Further, lines are branched on a flexible printed circuit board and intersecting lines are formed on a back surface of the flexible printed circuit board, and the intersecting lines are made to orthogonally intersect with lines formed on a front surface of the flexible printed circuit board thus lowering line capacitance.

Coupling and focusing ultrasonic detection method and detection device for polyethylene pipe hot melt butt joint

The invention relates to a method for detecting the welding quality of a hot-melt even joint of a polyethylene pipeline and a detection device thereof. The aim of the invention is that the provided detection method and the detection device have the characteristics of high sensitivity, high detection precision, high reliability, high detection efficiency and low misoperation rate. The technical proposal is a method for the coupling focusing ultrasonic detection of the hot-melt even joint of the polyethylene pipeline, which comprises the following steps: (1) a coupling agent liquid is positioned on the outer surface of a pipeline joint fusion region; (2) an ultrasonic probe adopting a spherical curved wafer is immersed into the coupling agent liquid in order that the focus is positioned in the centerline of the pipeline joint fusion region; and (3) the ultrasonic probe does linear scanning motion along the diameter direction of the pipeline and does uniform scanning motion along the circumferential direction of the pipeline; and obtained signal data is processed by a computer to form a C scanning picture. The ultrasonic detection device comprises a coupling receiving device, the ultrasonic probe adopting the spherical curved wafer, a mechanical scanning device, a signal processing and controlling system, and the computer.

Absorbance detection system for lab-on-a-chip

A high-efficiency, high-sensitivity absorbance detection system in a lab-on-a-chip is provided. The absorbance detection system includes detection cells having an optical pathlength ten times and/or much longer than the width of a separation channel to improve detection sensitivity, lens structures for collimating light in the detection cells, and slit structures for preventing scattered light from entering detectors. The detection cells, the lens structures, and the slit structures of the absorbance detection system are fabricated and integrated in a lab-on-a-chip. The absorbance detection system exhibits excellent absorption efficiency, detection limit, and linearity, compared to existing absorbance detection systems, and can be applied for the detection of a variety of samples. The absorbance detection system does not need labeling of the samples which saves time and costs. The absorbance detection system can be used effectively in detecting trace compounds with a high sensitivity. The absorbance detection system in a lab-on-a-chip can be used with wider applications to a variety of samples in diverse research fields, such as the drug screening field dealing with simultaneous synthesis and identification of a number of compounds based on combinatorial chemistry, the life sciences field handling trace bioactive materials such as enzymes, proteins, and amino acids, and the environmental research field which needs rapid field monitoring of contaminants.

Helium mass spectrometer leak detection method for sealing workpiece

The invention discloses a helium mass spectrometer leak detection method for a sealing workpiece. The method includes the steps that a first vacuum box is provided, and the sealing workpiece is placed in the first vacuum box; helium is injected into the first vacuum box, and sealing pressure maintaining is performed on the box; the sealing workpiece to be detected is taken out of the first vacuum box; a second vacuum box is provided, and the sealing workpiece taken out is placed in the second vacuum box; the second vacuum box is vacuumized, and vacuum pressure maintaining is performed on the second vacuum box; helium mass spectrometer leak detection is performed on gas inside the second vacuum box. A helium molecule pressing-in and pumping-out detection method is adopted, the method has the advantages of being high detection flexibility and detection accuracy, and the needed helium-containing pressure value is set according to pressure-resistance requirements of a to-be-detected closed container; the higher the pressure is, the higher the leak detection efficiency is; accordingly, the leakage amount of the to-be-detected closed container can be truly reflected, and special tools and fixtures are not needed; multiple workpieces can be detected at the same time to improve production efficiency, and the method can be widely applied to the temperature control pinger industry and the like.
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