58results about How to "Fast and Accurate Testing" patented technology

Detecting a leak from a site in a sealed system with a source of pressurized gas which is capable of passing through the site, a composition of matter which adheres to the surfaces of the system and which is capable of showing the presence of the gas escaping from the site. The method includes: injecting gas into the system to a pressure in excess of the surrounding pressure, and covering the external surface with the composition to identify the location of the site by the interaction of the escaping gas with the composition. The composition is foam that includes a surfactant which forms a least one bubble in the presence of escaping gas and an indicator which changes color in the presence of the escaping gas. The leak is an opening down to at least the size of a hole 0.001'' in diameter. A gas detector may also be used.

The invention discloses an Ia type diamond color quick grading method based on a spectrum. The Ia type diamond color quick grading method based on the spectrum comprises that balanced compound light is emitted on a to-be detected diamond, and the compound light which is reflected through the to-be detected diamond is collected through an integrating sphere. After the light collected by the integrating sphere is split, a charge coupled device (CCD) detector is used for detecting so as to obtain a reflectance spectrum of the to-be detected diamond. After the reflectance spectrum of the to-be detected diamond is uniformized, a nitrogen absorption band is selected from the uniformized reflectance spectrum, and then the area of the nitrogen absorption band is calculated. Compared the area of the nitrogen absorption band with a standard threshold value file, the color of the to-be detected diamond is graded. According to the Ia type diamond color quick grading method based on the spectrum, the nitrogen absorption band is selected from the reflectance spectrum of the collected to-be detected diamond and the area of the nitrogen absorption band is calculated, then the area of the nitrogen absorption band is compared with the standard threshold value file, and so that the grading of the color of the diamond is achieved. The Ia type diamond color quick grading method based on the spectrum is simple in operation, quick and accurate in testing, high in consistency and capable of being widely used in the jewelry identification industry.

The invention discloses a method for testing S-shaped interference beams based on a frequency control array, comprising the following steps: S1. Selecting a radar test receiver according to the distribution position of a preset S-shaped interference beam in space of a frequency control array radar transmitter The placement point is the test receiving point; S2, make the frequency control array radar transmitter start to transmit signals, and make each test receiving point receive all the transmitted signal data of at least one preset transmission cycle through the test receiving point; S3 1. Determine the test data of each test receiving point according to the received transmission signal data; S4. According to the spatial position and test data of each test receiving point, draw the two-dimensional beam diagram of the frequency control array, that is, fit the S-shaped interference beam. The invention solves the problems of low practicability, low concealment, low test efficiency, high implementation cost and large capital investment existing in the prior art.