6results about How to "High measurement sensitivity" patented technology

This invention discloses an insulating encapsulation structure and connection method for a probe temperature sensor, relating to the field of temperature sensor technology. The insulating connection bracket has an outer insulating and thermally conductive protective layer, and contains insulating adhesive and a temperature-sensing component. The specific implementation is as follows: an insulating layer assembly, a built-in snap-fit ​​structure within the insulating connection bracket, and an eccentric cavity for housing the temperature-sensing component. A thermistor glass body is used as the insulator. In the insulation process, direct contact between the glass body and the inner wall of the bracket reduces one useless insulating layer. The cavity formed by the end of the insulating connection bracket and the insulating layer assembly houses the temperature-sensing component. The cavity contains a clearance structure for the thermistor pins and multiple layers of insulation between the pins and the conductive copper wires. A fluid insulating adhesive is used, and then the insulating connection is cured. Finally, the encapsulation is placed inside a metal shell containing insulating adhesive and cured, thus forming multiple layers of effective insulation and sufficient safe insulation thickness between the thermistor conductive pins and the metal shell.

The present application relates to shear stress detection technical field, especially to a kind of stress detection device, comprising: first mechanical arm, second mechanical arm, detection component and power component, its first mechanical arm and second mechanical arm are respectively with same rotational speed along opposite rotating directions movement, to the part to be measured is applied a pair of equal, opposite force moment, to twist the part to be measured;Detection component is used to detect the torque generated by the part to be measured twisted by first mechanical arm and second mechanical arm.This application is by first mechanical arm and second mechanical arm with same rotational speed, opposite direction to part exert torque load, while with the flexible detection band and the strain matrix on it that adhere to the surface of part, real-time acquisition and processing the multidimensional torsional stress generated by part surface in the process of twisting, realize the directional, real-time detection of torsional stress.

The invention provides an optical microcavity dispersion measurement method based on dispersion linetype real-time calibration, which is applied to the technical field of microcavity dispersion measurement, and comprises the following steps: converting the position extraction of an optical sideband into the position extraction of a dispersion linetype, and demodulating the optical sideband through a frequency mixer to obtain a sideband harmonic peak of a specific dispersion linetype; adjusting the phase difference between a modulation signal and a demodulation signal of the high-stability radio frequency source, identifying the position of a dispersion line type sideband harmonic peak, and extracting the frequency interval of the sideband harmonic peaks on the two sides of each resonance mode; dynamically calibrating the optical fiber Mach-Zehnder interferometer based on the number of sinusoidal signal cycles in the frequency interval of the dispersion line type sideband resonance peaks on the two sides of each resonance mode to obtain a calibrated Mach-Zehnder interferometer; and generating a dispersion measurement result of the optical microcavity according to the calibrated Mach-Zehnder interferometer interference signal. According to the invention, the dispersion measurement precision and the automation level can be improved.

This invention discloses a single-component cantilever beam strain gauge for friction measurement, relating to the field of wind tunnel testing technology. It includes: a model end with a mounting platform that mates with the measurement surface; a single-component torque measuring element connected to the model end via a torque transmission element; and a fixed end at the end of the single-component torque measuring element for connection to a protective cover of the balance. A floating end for torque transmission transition is also provided between the torque transmission element and the single-component torque measuring element. The single-component torque measuring element is spatially located below the floating end, resulting in an eccentric spatial arrangement between the single-component torque measuring element and the measurement surface. This invention innovatively uses a cantilever beam structure in the friction measurement direction, resulting in an eccentric spatial arrangement between the measuring element and the measurement surface, enhancing the balance's measurement sensitivity. Furthermore, the overall structure is simple and easy to manufacture, thus offering the advantage of controllable cost.

The utility model belongs to gas density measurement technical field, especially relates to a kind of anti-explosion gas density gauge. Including: pressure sensing chamber, it is laid in the outside of the shell, and with the inner chamber of the shell is communicated;Pressure sensing diaphragm, its edge end is fixedly sealed with the inner wall of the pressure sensing chamber, axial end bottom is equipped with mandrel, the mandrel is slidably inserted in shaft hole and extends to the lead-through chamber of outside, wherein the shaft hole is opened in the bottom of the pressure sensing chamber, the lead-through chamber is laid in the bottom of the pressure sensing chamber;Spring, it is sleeved on the mandrel, and the upper end of the spring is connected with the pressure sensing chamber, lower end is connected with lead-through plate, the lead-through plate is connected with the lower end of the mandrel, the inner chamber bottom of the lead-through chamber still includes the touch switch of setting. The utility model is pushed by pressure sensing diaphragm and makes lead-through plate and touch switch touch, so that its pressure relief valve opens to carry out timely pressure relief, reach the function of self pressure relief explosion-proof.

This invention discloses a thermometer fixture suitable for transient processes in cryogenic systems, comprising a front guide tube, a rear guide tube, and a temperature measuring block with a temperature sensor mounting interface. The first end of the front guide tube and the first end of the rear guide tube are respectively connected to process piping, and the second ends of the front guide tube and the rear guide tube are respectively connected to the temperature measuring block. A heat exchange channel is formed inside the temperature measuring block, which communicates with the internal channels of the front and rear guide tubes to form a through-flow fluid channel. The fluid being measured can flow through the heat exchange channel and exchange heat with the temperature measuring block. This invention employs a through-flow structural design, combined with a temperature measuring block made of high thermal conductivity material and an optimized flow channel structure, significantly reducing the thermal inertia and thermal resistance of the temperature measuring system and improving the transient thermal response speed. It is particularly suitable for temperature measurement in cryogenic transient conditions such as superconducting cryogenic systems and modular hydrogen liquefaction equipment in the 20–30 K temperature range.