117 results about "Laboratory safety" patented technology

The invention discloses a device and a method for detecting total cyanide and sulfide in a water solution by employing direct conversion. The method comprises the following steps: feeding a sample solution of which the pH is greater than or equal to 11 into a six-way valve quantitative loop to quantify through an online filter, feeding excessive sample solution into a liquid waste bottle; switching a six-way valve, pumping a pure water solvent as a carrying current, pushing out the sample solution, and pumping a water solution containing a stabilizer and an exchanger in advance; after mixing with the sample coming from quantitative loop samples, switching a three-way valve, and refluxing into a storage bottle, further pushing the solution to be mixed evenly in a mixing pipe by virtue of the pure water solvent; entering a photolysis device to carry out photolysis until reaching a capture column in the six-way valve in an ion chromatograph; locking a to-be-detected object, feeding a non-to-be-detected object into the liquid waste bottle; rising the capture column by using an eluting solution, and entering a separation post; sequentially discharging the sulfide and cyanide; and respectively detecting the sulfide and the cyanide by virtue of an ampere detector, and then rinsing the separation column in a reinforcing manner. Compared with an existing national standard method, the method disclosed by the invention is green, safe, environment-friendly, and little in interference; the analysis time, the laboratory safety and the cost are obviously improved; and use of a toxic reagent is also reduced.

The invention discloses a laboratory safety management system based on the Internet of Things. The system comprises a sensing layer, a network transmission layer and an application layer, and the sensing layer comprises a data collector which is used for monitoring the environmental parameters of a laboratory and the operation parameters of all laboratory equipment, and the application layer comprises a cloud monitoring platform which receives and processes the operation parameters through the network transmission layer and a remote control center which is in communication connection with thecloud monitoring platform. On the basis of combination of big data, the Internet of Things information technology and traditional electrical fire hazard monitoring, the cloud monitoring platform is provided with multiple sensors for omnibearing real-time monitoring, and early fire hazard potential safety hazards can be quickly and accurately identified on the basis of the neural network model. Inaddition, alarms of different degrees can be processed respectively, so that harm caused by an electrical fire can be reduced, and accident loss can be reduced.

The invention discloses a safe transportation device for high-pressure combustible experimental gas and a gas supply method thereof. The device comprises a combustible experimental gas cylinder, an inert gas cylinder, a filter, a pipeline pressure reducing valve, a manual stop valve, a pneumatic stop valve, a pressure transmitter, a vacuum pump, a pressure gauge, a vacuum gauge, an electromagneticvalve, a combustible gas detector, a combustible gas alarm controller, a metal pipeline and the like. The device can be used for: 1) transporting the combustible gas to experimental equipment safely;2) adjusting the gas pressure in full range during the using process; 3) supplying gas continuously or intermittently for laboratory equipment; 4) conduting air tightness inspection to the equipmentbefore the experiment and supplying gas for cleaning tail gas after the experiment; 5) replacing the high-pressure gas cylinder safely and conveniently; 6) detecting combustible gas concentration in real time to maintain laboratory safety. With good air tightness, high cleanliness, high durability and safety reliability, the transportation device and method provided by the invention can meet the requirements of continuous gas supply and intermittent gas supply for the laboratory equipment.

The present invention relates to controlled airflow and air distribution within a laboratory safety enclosure and in particular, to turbulence-free airflow within a laboratory fume hood. The fume hood of the present invention has a work chamber and an access opening having an upper edge. A horizontal air deflector structure is positioned adjacent to the upper edge of the access opening to divert a portion of air entering the access opening upwardly within the chamber, whereby the diverted air eliminates an airflow eddy current.

The invention discloses a laboratory safety monitoring system and a working method thereof. The system comprises a background server and a monitoring device, wherein the monitoring device is arrangedin a laboratory and comprises a control device and a hazardous gas detection device, the hazardous gas detection device comprises a railway network and a plurality of gas detection modules, the railway network is arranged at the top of the laboratory in a lattice shape, the plurality of gas detection modules are arranged on the railway network and can move along the railway network, each gas detection module comprises a base, a plurality of different gas sensors are arranged on a lower surface of the base, the gas sensors are encircled in a round shape and are arranged along the round shape atequal distance, a moving mechanism is arranged at the top of the base and can move along a guide rail, a microprocessor and a first wireless communication module are further arranged on the base, andthe control device comprises a controller, a warning module and a second wireless communication module. By the system, the safety condition of the laboratory can be effectively monitored, and warningcan be timely given out when that hazardous gas is leaked from the laboratory is detected.

The invention relates to a security access method. An immersive laboratory security access method comprises the following steps: (1) selecting a scene and a level, (2) creating a role, (3) connectinga device, (4) defeating the level, (5) outputting a result, and (6) logging out a system. The method introduces a game mode into teaching, and immerses the user in a three-dimensional laboratory scenethrough VR technology, thereby bringing a real sense of manipulation to the students. Therefore, the learning efficiency of students is improved through hands-on operation, students' interest in learning is stimulated, the drawbacks of traditional teaching modes are tackled, and the quality of students' learning is greatly improved.

The invention provides an automatic face identification safety examination system. The system comprises a monitoring camera and a test device, wherein the monitoring camera and the test device are both in communication connection with a cloud server, the monitoring camera is used for shooting faces of students and acquiring face characteristic data of the students in a fixed time and transmittingthe face characteristic data to the cloud server, the face characteristic data corresponds to the students in a one-to-one correspondence, and the cloud server is used for searching examinee identifiers according to the face characteristic data information, automatically acquiring question keywords according to the examinee identifiers and constructing test questions issued to the students. The system is advantaged in that a problem that the current laboratory safety test can not achieve adequate room conditions, personalization and differentiation in the prior art is solved, targeted and morespecific safety exam training can be organized, and problems of poor monitoring of online security exams, easily-generated surrogate exam-taking phenomena, frauds and other issues are solved.

The invention discloses a laboratory safety monitoring and guidance system comprising a laboratory body, an identity verification module, and an experimental platform. A safety door is arranged at theentrance of the laboratory body. The identity verification module includes a fingerprint inputting unit, a user database and a processing unit; the processing unit controls the safety door to be opened after fingerprint comparison success. The experimental platform includes a reagent bench, a monitoring unit and an early warning unit; the monitoring unit monitors types and usage amounts of used reagents in an experiment; an early warning database, an alarm device and a first camera are arranged inside the early warning unit; the first camera starts shooting to shoot an image in front of the reagent bench when any one of dangerous experimental reagent combination unit or a certain dangerous reagent is used; and the alarm device carries out alarming when the any one of dangerous experimental reagent combination unit is used or the usage amount of the dangerous reagent exceeds a limit. Therefore, the experimental process is monitored; and when any potential hazard occurs, early warning is carried out timely to protect the safety of the personnel and property.