5 results about "White Cell" patented technology

The invention belongs to the technical field of gas detection, and particularly relates to a sulfur hexafluoride (SF) concentration detection method and device based on a dual-band tunable diode laser absorption spectrum (TDLAS) and electronic equipment. In order to solve the problems that in an existing SFdetection technology, quantification and positioning functions are separated, the anti-interference capability is poor, and high sensitivity and rapid imaging cannot be synchronously achieved, the invention provides a method combining dual-band differential absorption and TDLAS. According to the scheme, a detection device in which an open type backward reflection path is combined with a built-in White cell (a multi-reflection cell) is adopted, 10.55 microns are selected as a measurement wave band, and 9 microns are selected as a reference wave band; through synchronous or alternate acquisition of dual-band signals, wavelet denoising preprocessing, differential absorption concentration inversion, Kalman filtering gas cloud tracking and Gaussian plume model leakage source inversion, rapid imaging positioning and accurate concentration quantification of an SFleakage point are realized. The system has the advantages of high detection sensitivity, strong anti-interference capability and integrated quantitative positioning function, and is suitable for efficient inspection and accurate diagnosis of the SFleakage of the power equipment.

The invention discloses a device capable of being used for detecting the concentration of various gases based on the White cell principle, and a plurality of light splitting reflectors plated with different light splitting films are sequentially arranged on an emergent light path of a White cell, so that the different light splitting reflectors can reflect laser in a specific wave band and transmit and reflect laser outside the wave band; a photodiode matched with the reflection wave band of the corresponding light splitting reflector is arranged on the reflection light path of each light splitting reflector, so that the same gas cell can be correspondingly matched and provided with a plurality of photodiodes suitable for different wave bands, and therefore, the purpose that multiple photodiodes are matched and mounted in one gas absorption cell can be realized; and the body concentration of various gases with large absorption wavelength difference is detected, so that the use of a plurality of gas absorption pools is avoided, the volume of the detection system is reduced, and the cost is saved.

The present application relates to the technical field of optical reflection cavities. Provided are an optical reflection cavity, an optical multi-pass cell system, and an optical resonant cavity system. In the optical reflection cavity provided in the embodiments of the present application, a first sub-plane mirror is introduced into a plano-concave cavity, the first sub-plane mirror is disposed in an edge region of a main plane mirror in a y-axis direction and is inclined relative to the main plane mirror in the y-axis direction, and the length of the first sub-plane mirror in an x-axis direction is at least one times the width of a trajectory of a light beam on the main plane mirror in the x-axis direction, so that the light beam can be reflected by the first sub-plane mirror at least once, and the translation direction of the trajectory is continuously changed after the light beam is reflected by the first sub-plane mirror, so as to increase the number of reflections of the light beam within a limited volume, thereby increasing an optical path length and the distribution density of reflected light spots. Compared with a Herriot cell and a White cell, more reflections, a larger optical-path-length-to-volume ratio and a higher distribution density of the light spots can be achieved.

A spectral gas sensor (1) comprising a multi-path absorption cell (4) is described. The multi-path absorption cell (4) comprises: a component reflector unit (5) defining a concave first surface (6 ') having a first center of curvature (19) and comprising at least one first reflector (6); and a main reflector unit (7) comprising a concave second reflector (8) defining a second center of curvature (17) and a concave third reflector (9) defining a third center of curvature (18). The component reflector unit (5), the second reflector (8) and the third reflector (9) are arranged in a White cell configuration. The light source (11) is configured to emit and direct light towards the concave second reflector (8). A first detector (15) is arranged in the component reflector unit (5) such that the first detector is illuminated by a light spot during operation of the gas sensor (1). The component reflector unit (5) comprises an optical return unit (20) comprising a light input (LI) at a first distance from the longitudinal optical plane (C).

The present invention relates to the field of trace element detection, and in particular to a system for detecting trace element concentrations in water, comprising an atomizing device; an air chamber connected to the atomizing device, the interior of which is provided with a dynamically adjustable White cell optical path for enhancing spectral absorption signals of low-concentration trace elements; an optical path modulation module installed on the side wall of the air chamber; a temperature control module for adjusting the temperature of the optical element and the air chamber; a spectral detection module arranged behind the light outlet of the air chamber for detecting spectral signals after absorbing aerosol; an ionization and mass spectrometry module comprising an ionization source and a mass spectrometer, the ionization source being used to ionize the aerosol in the air chamber into ions, and the mass spectrometer being used to separate the ions according to the mass-to-charge ratio and perform detection. The present invention adopts a spectral and mass spectrometry-combined technology to atomize a water sample to be tested into aerosol droplets, and by enhancing the spectral absorption signals of low-concentration trace elements, achieves high-sensitivity detection of trace elements in water.