摘要:
A measurement apparatus (100), which is arranged on a pipe (101), and is configured to measure the liquid content of a medium within the pipe (101); said apparatus comprises: a light transmission member (210), a light generation device (203), and a light reception device (204); the light generation device (203) is configured to emit emission light toward the light transmission member (210) that passes through an outer boundary wall (214) of the light transmission member (210) and has a preset emission angle, and the light reception device (204) is configured to receive reflection light after the emission light is reflected by an inner boundary wall (215) of the light transmission member (210). The measurement apparatus (100) can directly detect whether liquid is carried in a gaseous refrigerant exiting from an evaporator, as well as measure the amount of carried liquid. The refrigeration system can adjust a throttling apparatus in a timely manner according to a measured result, and prevents the performance of the refrigeration system and a compressor from being affected.
摘要:
Systems and methods for determining the osmolarity of a sample are provided. Aspects of the subject methods include contacting a sensing surface of a sensor with a sample, and generating one or more data sets over a time interval, wherein the data sets are surface plasmon resonance data used to determine the osmolarity of the sample. The subject methods find use in determining the osmolarity of a sample, such as a biological sample (e.g., a tear fluid), and in the diagnosis and/or monitoring of various diseases and disorders, such as, e.g., dry eye disease.
摘要:
Described is a drop detection apparatus (11, 11a) for detecting drops (TR) that exit a metering valve (DV) and move along a path. The drop detection apparatus (11, 11a) comprises an optical waveguide arrangement (L) having a first optical waveguide (L1) and a second optical waveguide (L2). The first optical waveguide (L1) and the second optical waveguide (L2) are arranged across from each other, in a space through which the path of the drop (TR) extends, in such a way that a light beam (LS) emitted by the first optical waveguide (L1) intersects the path (T) of the drop (TR) and is then coupled into the second optical waveguide (L2). The drop detection apparatus (11, 11a) additionally comprises a light signal generation device (70) for coupling a light beam (LS) pulsed at a carrier frequency into the first optical waveguide (L1). The drop detection apparatus (11, 11a) further comprises a light evaluation device (80) for evaluating the light beam (LS) coupled into the second optical waveguide (L2) in order to determine whether a drop (TR) has been dispensed by the metering valve (DV). A method (500) for detecting a drop (TR) is also described.
摘要:
A device (1) for measuring the physical parameters of a liquid, comprising a casing 10 adapted to be placed at least partially to be in contact with the liquid and inside of which there are arranged: a refractometer 20 configured for measuring a value of refractive index of the beverage, and a sonic unit 30 configured for measuring a value of sound propagation speed in the liquid.
摘要:
Embodiments of the invention comprise apparatus and methods for detecting the presence of a substance in a test material using a plurality of wavelength-specific couplers (e.g. tilted fibre gratings) which provide a spatially distributed multi-node all-optical measurement system. Each node of the measurement system can comprise an optical module that is sensitive to the intensity of a limited band of wavelengths. The node is thus capable of detecting the presence of an absorption peak in a spectrum without having to obtain the full spectrum. By providing a plurality of optical modules that are sensitive to different wavelengths, the spectral signature of different substances may be monitored without having to measure full spectra. The measurement system may be particularly useful in a process control environment where it is desirable to take measurements of one or more substances in different locations.
摘要:
The present disclosure provides an easily-miniaturized, conveniently-operated device for measuring a polarization degree and a refractive index of an object simultaneously under an identical measurement condition. The device includes a sample chamber (1) configured to receive the object, a polarization degree measuring member (2) configured to measure the polarization degree of the object received in the sample chamber (1), and a refractive index measuring member (3) configured to measure information corresponding to the refractive index of the object received in the sample chamber (1). The polarization degree measuring member (2) includes a polarization modulation member (11) configured to perform polarization modulation on a light beam (9) for analyzing the object and allow the modulated light beam to enter the sample chamber (1), an intensity detection member (12) configured to detect an intensity of the light beam (5) exiting from the sample chamber, and a polarization degree calculation member (13). The refractive index measuring member (3) includes a position detection member (26) configured to detect position information about a light beam (24) entering a prism (8) that forms a bottom of the sample chamber (1), and a refractive index (concentration) calculation member (13).
摘要:
A system includes a signal source that provides a first signal for measuring a gas content of a liquid sample. The system also includes an analyzer that determines the gas content of the liquid sample using a measurement of a second signal, where the second signal is based on the first signal. The system further includes an apparatus with a walled structure having a cavity. The apparatus also includes a piston that pulls the liquid sample into the cavity and pushes the liquid sample out of the cavity. The apparatus further includes at least one measurement window having at least one inner surface exposed within the cavity. The at least one measurement window receives the first signal from the signal source and provides the second signal to the analyzer. The piston could also clean the at least one inner surface, and the piston can include a reference material for calibrating the analyzer.
摘要:
A liquid detector (1) includes a plurality of optical fibers (11A, 11B, 11C) provided with bent portions, light emitting elements (12A, 12B, 12C) which are respectively provided in the optical fibers (11A, 11B, 11C) and input light according to electrical signals input from the outside to one end of the optical fibers (11A, 11B, 11C), and light receiving elements (13A, 13B, 13C) which are respectively provided in the optical fibers (11A, 11B, 11C) and output electrical signals according to light emitted from the other end of the optical fibers (11A, 11B, 11 C) to the outside. The bend radiuses (Ra, Rb, Rc) of the bent portions of the optical fibers (11A, 11B, 11C) are set in accordance with the refractive indexes of associated liquids to be detected.