47results about How to "Reliable detection means" patented technology

The invention discloses a subway shield tunnel lining quality high-precision rapid vehicle detection method and apparatus. The detection apparatus comprises an image acquisition module, a ground-penetrating radar module, a multi-sensor fusion positioning module, a laser range-finding module and an industrial personal computer, the image acquisition module comprises a linear array CCD industrial camera and an LED light source, the ground-penetrating radar module comprises a ground-penetrating radar antenna and a ground-penetrating radar host, and the multi-sensor fusion positioning module comprises an inertia measuring apparatus and an encoder. The method and apparatus can be used for automation and normalization detection of the shield tunnel lining quality of existed subway lines, the power failure operation is avoided, a maintenance skylight is not occupied, normal operation of the subway is not influenced, the detection efficiency is substantially improved, the detection time of disease types and positions is greatly shortened, the damage to the tunnel lining can be eliminated in time, and the safety operation of the subway and the life and property safety of people are guaranteed.

The invention discloses a fluorescent whitening agent detector which comprises a detector body, and a display screen and a fluorescent detection module are arranged on the upper surface of the detector body, and the fluorescence detection module comprises a detection main body and a detection cell. The invention also discloses a detection method of the fluorescent whitening agent detector, which comprises the steps of putting to-be-detected samples into the detection cell, then arranging into the detection main body, detecting and reading. The fluorescent whitening agent in products is subjected to quantitative detection by means of the detector disclosed by the invention in a quick, accurate and easily portable manner on the spot; the detection method of the detector is simple, fast and accurate.

The invention provides a method for measuring residual quantity of organic chloride pesticides in traditional Chinese medicinal materials. A GPC-SPE-GC method is established, and the residual quantity of seventeen organic chloride pesticides in traditional Chinese medicinal materials is detected. The method comprises the following steps: extracting, performing preliminary GPC purification, performing solid phase extraction and binary purification, namely combining 200mg/3mL of aminopropyl column NH2SPE and 250mg/3mL of graphitized carbon black column GCB SPE, and sequentially purifying; and eluting according to a volume ratio of 8:2 of normal hexane to acetone solution. Compared with a traditional concentrated sulfuric acid purification method, the method disclosed by the invention has high sensitivity and safety, provides reliable detection means for safety production of traditional Chinese medicinal materials in China and safety supervision of exported foods and drugs and is worthy of popularization and application.

The invention discloses a method for detecting non-anode effect CF4, which comprises a sampling point which is obtained by sampling electrolytic tank flue gas on a gas pipe of the electrolytic tank, a tank cover plate of the electrolytic tank is kept in a sealed state, the gas collection efficiency of the flue gas in the electrolytic tank is not less than 90%, a detection device spectral analysis sensitizing zone is corrected, therefore the volume concentration of the CF4 spectral analysis sensitizing zone is in 0-1ppmv scope; the dust in flue gas is removed before the flue gas is introduced in the detection device, a drying agent is used for absorbing the moisture in flue gas; the detection device is started, the zero point of the device is calibrated, and the flue gas flux in the detection device is regulated, voltage change and anodic current density change of the electrolytic tank are monitored, when the voltage of the electrolytic tank exceeds normal operation voltage by 50 millivolts or anodic current density exceeds normal operation current density by 0.5A/cm<2>, the detection is started, and the volume concentration of CF4 is recorded. The method of the invention can detect the non-anode effect CF4 with extreme low concentration and reach the purpose of quantitative analysis of the non-anode effect CF4.

The invention provides a detection method for an instrument constant test by adopting a standard meter method. The detection method comprises the following steps of connecting a standard meter with adetected electric energy meter, applying reference voltage of the detected electric energy meter to the standard meter, and reading current forward active total electric energy of the detected electric energy meter as an initial electric energy value, applying the maximum current of the detected electric energy meter to the standard meter, setting a phase angle to be 0 degree, and starting the test after the power output of the standard meter is stable, accumulating the electric energy value of the standard meter, and when the accumulated electric energy value of the standard meter is within apreset range, adjusting the phase angle according to a preset phase shift angle, continuing to accumulate the electric energy value of the standard meter, and when the accumulated electric energy value of the standard meter is not less than a preset standard travel threshold, reading the current forward active total electric energy of the detected electric energy meter as a termination electric energy value, calculating the difference between the final electric energy value and the initial electric energy value of the detected electric energy meter, and calculating the error gamma of the detected electric energy meter, and judging qualification if gamma does not exceed the basic error limit, or otherwise, judging disqualification.

The invention relates to a method for rapidly detecting alarm link failure in IP (internal protocol)-RAN (random access network) equipment. The method comprises the steps of: making a quick alarming link detecting protocol including a request message (request) and a reply message (replay); periodically sending the request message (request) to a main control unit through the business interface unit of the IP-RAN equipment; and if the business interface unit receives the reply message (replay) and can correctly fetch field information from the reply message (replay), determining that the link for the message transmission is correct based on physics and logic; otherwise, determining the link as the chain in an abnormal state. By using the method provided by the invention, the defects that the alarming is out of work because the alarming can not be normally transmitted due to abnormal link are prevented during researching, developing, producing, managing and maintaining IP-RAN equipment; and a mechanism for quickly detecting the alarming link fault between boards is provided to achieve efficient, reliable and flexible alarming link detecting means, which has important implications for ensuring the stability of the business.

The invention relates to a method for determining chloramphenicol in freshwater pond sediment by applying a liquid chromatograph/mass spectrometer. The method comprises the following steps of firstly, collecting a sediment sample of an aquaculture pond; secondly, extracting the sample; thirdly, purifying with n-hexane; fourthly, extracting water saturated ethyl acetate solution; fifthly, blowing extracting solution to be dry with nitrogen gas, and dissolving the dry extracting solution with acetonitrile-water (5+95) to obtain standby solution; sixthly, performing solid phase extraction column for eluting; seventhly, extracting the water saturated ethyl acetate solution, and blowing dry with the nitrogen gas; eightly, dissolving methanol water (50+50), whirling, filtering by a microfiltration membrane of 0.22[mu]m and determining by using the liquid chromatograph/mass spectrometer. According to the method disclosed by the invention, by pretreatment for the freshwater pond sediment, a matrix disturbing substance is removed, the sensitivity is improved, and the pretreatment process is optimized; in addition, the sample is prevented from being derivaed, so that the operation step is simplified; a reliable detection means can be provided for checking a pollution source and evaluating the influence of the ecological environment on healthy breeding.

The invention relates to a pollutant interface reaction electrochemical infrared spectroscopy combined in-situ characterization method and device. The electrochemical infrared spectrum combined detection method constructed by the invention can obtain synchronous qualitative/quantitative, macroscopic/microcosmic and other multi-dimensional information of a target reaction, so that the pollutant reaction is more comprehensively understood, the multi-dimensional clarification of a pollutant interface process and a regulation and control mechanism is facilitated, and the pollution problem is effectively solved. The electrochemical infrared spectrum combination device established by the invention is relatively simple to operate, long in service life, relatively wide in infrared wave number application range and relatively multiple in application, and can be widely applied to in-situ characterization of pollutant interface reaction.

The invention discloses a Pediococcus pentosaceus strain which is collected by China General Microbiological Culture Collection Center, and the collection number is CGMCC No.10573. The invention also discloses application of the Pediococcus pentosaceus strain in resisting Listeria monocytogenes. Separation purification and screening of lactobacillus, and primary screening and rescreening of the Listeria monocytogenes strain are performed to obtain the safe and effective Listeria monocytogenes antagonistic strain. When being used in the stage with high tendency to contamination by the Listeria monocytogenes, the Listeria monocytogenes antagonistic strain can enhance the Listeria monocytogenes control level in food, provides a reliable and effective detection means for Listeria monocytogenes examination and quarantine inspection in import and export food, lowers the risk in imports and exports, and promotes the import and export trade and economic development.

The invention discloses a nucleic acid composition and reagent kit for detecting cardiovascular disease medication related genes based on a nucleic acid mass-spectrometric technique, and a detection method, and relates to the technical field of gene detection. The nucleic acid composition disclosed by the invention comprises an amplification primer set for performing multiplex PCR amplification oncardiovascular disease medication related genes, and an extension primer set for performing a single-base extension reaction. When the nucleic acid composition, the reagent kit or the detection method provided by the invention is used, 16-site genotypes of the cardiovascular disease medication related genes can be detected through the nucleic acid mass-spectrometric technique, the characteristicsthat the sensitivity is high, the specificity is high, the result is easy to recognize, the accuracy is increased and the operations are convenient are obtained, a more reliable detection means is provided for detection of the cardiovascular disease medication related genes, and more reasonable medication guidance is also provided for individualization medication of cardiovascular diseases.

The invention discloses an ultrasonic automatic detection system for self-healing discharge of a self-healing parallel capacitor and an ultrasonic automatic detection method. The method comprises thesteps of picking up an ultrasonic signal generated by the self-healing discharge by adopting an acoustic emission sensor; amplifying the weak ultrasonic signal of the self-healing discharge by using apre-amplifier, and performing analog filtering on the signal through a band-pass filtering module; transmitting the signal to an upper computer by using a high-resolution A/D acquisition board card;processing and identifying the ultrasonic signal by the upper computer; judging the number of self-healing discharge times of the capacitor to be detected, judging the current self-healing discharge detection stage of the self-healing parallel capacitor according to the direct-current power supply output voltage value acquired by the voltage sensor in real time; and finally giving a detection report. The method is safe, portable and easy to operate, the discharging process is judged by detecting the ultrasonic signal generated by self-healing discharge of the capacitor, the method is suitablefor self-healing discharging detection occasions of the self-healing parallel capacitor, and a reliable and accurate detection means is provided for the self-healing parallel capacitor for an alternating-current power system.

The invention discloses a high performance liquid chromatography detection method for characteristic chromatograms of sophora flower raw medicinal materials and decoction pieces, and relates to the technical field of medicinal material detection. The method takes octadecylsilane chemically bonded silica as a filler, acetonitrile as a mobile phase A and a 0.1% phosphoric acid solution as a mobile phase B. The method comprises the following steps: step S1, gradient elution time is 0-28 minutes, the mobile phase A accounts for 10-18%, and the mobile phase B accounts for 90-82%; s2, gradient elution time is 28-48 min, the mobile phase A accounts for 18%-35%, and the mobile phase B accounts for 82%-65%; s3, carrying out gradient elution for 48 to 56 minutes, taking 35 to 50 percent of the mobile phase A and 65 to 50 percent of the mobile phase B; s4, gradient elution is carried out for 56-60 min, the mobile phase A accounts for 50%-10%, and the mobile phase B accounts for 50%-90%; and S5, gradient elution is carried out for 60-65 min, the mobile phase A accounts for 10%, and the mobile phase B accounts for 90%. The method effectively makes up the vacancy that no sophora flower raw medicinal material and decoction piece characteristic spectrum detection method exists in the country at present.