2results about How to "Continuous and precise measurement" patented technology

The invention discloses a two-stage ultrafine particulate matter detection device capable of continuously measuring, which belongs to the field of gas particulate matter detection and testing and comprises a first-stage detection device and a second-stage detection device which are connected in sequence, the first-stage detection device is used for collecting first temperature information of the ultrafine particles and carrying out first-stage detection on the ultrafine particles by using different channels according to the first temperature information to obtain a first-stage detection result, and the second-stage detection device is used for collecting second temperature information of the ultrafine particles subjected to the first-stage detection and carrying out second-stage detection on the ultrafine particles subjected to the second-stage detection to obtain a second-stage detection result; and according to the second temperature information, performing second-stage detection on the ultrafine particles subjected to the first-stage detection by using different channels to obtain the quantity and concentration information of the ultrafine particles subjected to the second-stage detection. The detection precision is improved through secondary detection, continuous application detection of high and low temperature scenes can be realized, the environmental temperature adaptability of detection is improved, and meanwhile, the detection efficiency and the detection convenience are also improved.

The present application relates to the technical field of roadbed monitoring, and particularly relates to a roadbed settlement automatic monitoring system and method based on optical fiber sensing technology, comprising a fiber grating demodulator, a plurality of strain optical cables arranged along the longitudinal direction of the roadbed, and a plurality of transverse deformation correction units, the strain optical cables are arranged between the base bed bottom layer and the base bed surface layer and are connected with the fiber grating demodulator; the plurality of transverse deformation correction units are arranged along the longitudinal direction of the roadbed at intervals, and are used for monitoring the actual deformation amount of each strain optical cable at the cross section. The strain optical cables are arranged along the longitudinal direction of the roadbed, so that long-distance continuous measurement and monitoring can be realized; meanwhile, a plurality of transverse deformation correction units are arranged along the longitudinal direction of the roadbed at intervals, the actual deformation amount of the strain optical cables at a plurality of cross sections is monitored, the deformation amount of the strain optical cables in the whole section is corrected, and the monitoring precision of long-distance continuous monitoring of the optical fiber is improved.