31results about How to "Test directly" patented technology

The invention provides a method and a system for acquiring diaphragm compliance. The diaphragm compliance is acquired through a sealed space comprising a structural cavity and a diaphragm. The method includes the steps: acquiring the diaphragm compliance according to displacement generated in vibration of a diaphragm and pressure applied to the diaphragm in vibration; converting externally inputted electric signals into acoustic signals and vibrating the diaphragm; acquiring the displacement generated in vibration of the diaphragm and acoustic pressure in the sealed space; multiplying the acquired acoustic pressure by the acoustic pressure covering area of the diaphragm to obtain the pressure applied to the diaphragm in vibration, and dividing the acquired displacement by the pressure applied to the diaphragm in vibration to obtain the diaphragm compliance. According to the method and the system for acquiring the diaphragm compliance, the diaphragm compliance can be independently tested in a sealed environment without being interfered by a surrounding environment or affected by diaphragm quality factors, so that the diaphragm compliance is more directly tested and higher in confidence.

The invention discloses a scanning thermoelectric microscopy device for microimaging of thermoelectric FOM (Figure of Merit) factor behaviors. The device is used for resolution microimaging of sub-surface thermoelectric FOM factor behaviors of a to-be-tested thermoelectric material sample. The device includes a subsurface thermoelectric signal in situ excitation module used for in situ excitationof subsurface thermoelectric Seebeck current signals of the to-be-tested thermoelectric material sample; a thermoelectric signal in situ detection module used for in situ real time detection of the subsurface thermoelectric Seebeck current signals of the to-be-tested thermoelectric material sample; a thermoelectric signal microimaging module used for high resolution microimaging and displaying ofthe subsurface thermoelectric FOM factor signals. The device provided by the invention has unique functions of in situ excitation and in situ synchronous representation of subsurface thermoelectric signals and has advantages of high resolution rate, high flexibility, high signal to noise ratio, testing directness and the like. The device is simple in structure and high in compatibility, is suitable for combination with different commercial scanning electron microscopes and is a novel technique easy to promote and apply.

The invention discloses a soil relaxation rate acquisition method, which belongs to the technical field of geotechnical engineering. The method for obtaining the relaxation rate of the soil body comprises the following steps: soak and wash the soil particles in distilled water and then air-dry to obtain the soil body; prepare the soil body into several samples, and the water contents of several samples are all different; Put the sample into the NMR instrument, apply sequences to several samples, invert the original NMR data, and obtain the pore water NMR relaxation time distribution curve of several samples; find the peak point value on the NMR relaxation time distribution curve, The relaxation rate of the corresponding sample is obtained according to the peak point value; according to the relaxation rate of several samples and the water content of several samples, a relaxation rate-water content diagram is made, and found in the relaxation rate-water content diagram The straight line segment, and the average value of the relaxation rate of the straight line segment is calculated, and the average value is the final relaxation rate of the soil sample. The method for obtaining the relaxation rate of the soil body of the invention can quickly and directly test the relaxation rate of the soil body, and improves the testing efficiency.