41results about How to "The measurement method is simple and fast" patented technology

The invention provides a method for measuring the eccentricity of a regular hexagonal cross section shaft. The eccentricity of the regular hexagonal cross section shaft can be accurately and conveniently measured by using a flat-folding tappet type detection mechanism. One end of the flat-folding tappet type detection mechanism abuts against the hexagonal shaft and is located below the to-be-detected section of the hexagonal shaft, and m a displacement sensor is placed below the other end of the detection mechanism; the hexagonal shaft is rotated, the detection mechanism swings around the rotation center along with the hexagonal shaft, and the displacement sensor records the swing displacement value of the detection mechanism in real time; and a function relational expression between the predicted eccentricity and deflection angle and known parameters and displacement sensor indication values is deduced according to the geometrical relationship of each part and mathematical transformation. The measuring method is simple and convenient, the measuring precision is high, and an effective solution is provided for engineering problems such as hexagonal shaft straightness measurement andhexagonal shaft straightening.

The embodiment of the invention discloses a cathode protection parameter detection method and device for a buried pipeline and a storage medium, and the method comprises the steps: carrying out the frequency division of a pipeline potential signal of the buried pipeline through a high-pass filter, and obtaining a power frequency AC interference signal; performing frequency division on the pipeline potential signal by adopting a low-pass filter to obtain a composite signal of a direct-current signal and an extremely-low-frequency alternating-current interference signal; frequency division is carried out on the composite signal by adopting a digital filtering technology, so that a direct-current signal and an extremely-low-frequency alternating-current interference signal are obtained through separation; performing frequency division on the composite signal by adopting a power-off measurement method to obtain an effective direct-current protection potential signal; determining a direct-current interference signal according to the difference between the direct-current signal and the effective direct-current protection potential signal; power frequency alternating current interference signals, extremely low frequency alternating current interference signals, effective direct current protection potential signals and direct current interference signals are detected and output at the same time. The method has the advantages of convenience, rapidness, accuracy, comprehensiveness and wide application range, and can be widely applied to the field of buried pipeline protection.

The invention discloses a prism refractive index measurement system, comprising a light source, a measurement mechanism and a collimating member. The measurement mechanism comprises a casing, a gyroscope sensor, a clock module, a central processing module and a display module; the gyroscope sensor, the clock module, the central The processing modules are all arranged inside the casing, and the outer casing is provided with a measuring wall; the gyroscope sensor, the clock module, and the display module are electrically connected to the central processing module, which replaces the tedious measurement of the prism refraction angle and the minimum deflection angle by the spectrometer, and saves the The manual calculation process is simple and fast; the invention discloses a prism refractive index measurement method, which uses a gyroscope and a central processing module to calculate the prism refraction angle and the minimum deflection angle, and uses the central processing module to calculate the refractive index, Thus, the prism-related angle measurement and the calculation of the refractive index are conveniently realized.