39results about How to "Quick leak detection" patented technology

A process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators, wherein the polymerization is carried out at temperatures from 100° C. to 350° C. and pressures in the range of from 110 MPa to 500 MPa in a continuously operated polymerization reactor which is controlled by a pressure control valve at the outlet of the polymerization reactor, the process comprising continuously monitoring the pressure within the polymerization reactor, feeding a pressure signal to a controller for controlling the control valve and having the controller altering the opening of the pressure control valve to control the pressure within the polymerization reactor, wherein the controller starts an emergency shutdown program when the pressure control valve closes more than a preset threshold value and the pressure within the polymerization reactor decreases below a preset pressure threshold.

In a calibration mode, an equilibrium period after pressurized gas is sealed in a device under inspection and a reference tank is divided into two periods; pressure-difference changes ΔP1 and ΔP2 are measured when a first-half equilibrium period of duration T1 elapses and when a second-half equilibrium period of duration T1 elapses, respectively; and a pressure-difference change ΔP3 generated in an inspection period of duration T2 is measured. A pressure-difference change CT2 generated for duration T2 from when a period of time in which the influence of an adiabatic change seems to become sufficiently stable elapses is measured. A drift correction coefficient K is calculated from these measured values using K=(ΔP3−CT2) / (ΔP1−ΔP2), is stored in a storage section, and is used in an inspection mode.

The invention discloses a penicillin bottle leakage detection device based on a dual wavelength-TDLAS technology and a measurement method thereof. The device comprises a laser, a laser controller, anoptical fiber coupler, a first collimator, a first detector, a second collimator, a second detector, an acquisition card and a computer, wherein the laser controller is electrically connected with thelaser; the optical fiber coupler is connected with the laser; the first collimator is used for collimating laser beams with a laser intensity ratio to be a; the first detector is fixed on the first collimator; the second collimator and the second detector are fixed at two sides of the penicillin bottle body; the acquisition card is electrically connected with the first detector and the second detector; and the computer is electrically connected with the acquisition card. The method comprises the following steps: the laser is adopted to output two laser beams with different output wavelengths,the two laser beams are divided to two kinds of laser beams with the laser intensity ratios to be a and b by the optical fiber coupler, the collimators are adopted to collimate the split laser beams,the split laser beams are received by the detectors, the beams are acquired by the acquisition card after initial intensity and transmitting intensity are obtained, the optical signals are convertedto electric signals and are then transmitted to the computer for data processing, and the leakage coefficient of the penicillin bottle is obtained.