3results about How to "Intrinsically safe" patented technology

This invention discloses an improved ratiometric fluorescence temperature sensing device and temperature detection method, belonging to the field of temperature sensing technology. It includes a temperature-sensitive fluorescent material, two excitation sources of different wavelengths, a spectrometer, a spectrometer, and an imaging optical path. The method includes: the two excitation sources of different wavelengths are excited to the temperature-sensitive fluorescent material by the spectrometer through a common optical path; the fluorescence spectral data of fluorescent substance A is compared with the fluorescence spectral data of fluorescent substance B at the same wavelength to obtain new synthetic fluorescence spectral data; the intensity integral ratio of this new fluorescence spectral data is calculated within a specific range to obtain the fluorescence intensity ratio characterizing the temperature; the change of the intensity integral ratio with temperature is fitted to a temperature calibration curve to obtain the measured temperature. This invention can be applied to harsh environments, is unaffected by losses in the optical path, achieves absolutely accurate non-contact temperature measurement, and features high sensitivity, high precision, high temperature resistance, low manufacturing cost, and is unaffected by laser pump power.

The utility model discloses a passive wireless vibration sensing device and system, sensing device includes antenna group, the antenna group includes at least one antenna, antenna group is connected with frequency conversion device and phase modulation device, frequency conversion device is connected with phase modulation device, and phase modulation device is connected with piezoelectric device, sensing system includes read-write device, and read-write device is connected with at least one passive wireless vibration sensing device, the utility model can carry out real -time accurate monitoring to vibration under the condition of passive.

The utility model relates to an intrinsically safe drill box dustproof sealing structure belongs to drill box dustproof sealing technical field, concretely relates to an intrinsically safe drill box dustproof sealing structure. Aims at solving the problems existing in the process of the current coal mine underground anchor rod, in the process, oil seal lip long-term immersion in the mud water, and the friction with the main shaft, causes the main shaft end face to be ground out groove. Further lead to oil seal spring pre-tightening force deficiency, lip cannot hold tightly the main shaft end face. Moreover, when maintaining, need to replace oil seal to disassemble complete machine, the worn main shaft surface will make sealing failure, when maintaining, also need to replace the main shaft. To solve the above problem, now provide an intrinsically safe drill box dustproof sealing structure. The structure is through the design combination of oil seal external installation, friction surface downward, T type stationary cover, can effectively prevent the mud water invasion. Its maintenance is convenient, and oil seal and T type stationary cover are independent structure, and easy to replace. The main shaft is not directly contacted with oil seal, can prolong the service life of main shaft.