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35results about How to "Concentration real-time detection" patented technology

Intelligent fresh air control device

The invention discloses an intelligent fresh air control device, which relates to a fresh air conditioning device of an air conditioning system. The intelligent fresh air control device mainly comprises a temperature humidity sensor, a carbon dioxide concentration sensor, a computer controller, an electrically operated valve and the like. The intelligent fresh air control device has the characteristics of intelligent control, convenient use, accurate control, energy-saving operation, small volume and low cost. And the intelligent fresh air control device also has the characteristics of improving the indoor air quality and meeting requirements of people for the indoor comfort and health. The intelligent fresh air control device can be widely applied to the air conditioning systems of various buildings such as residences, hotels, public buildings and the like and is the fresh air device which is controlled intelligently and saves energy.
Owner:CHONGQING UNIV

Ultrasonic array detection method for multi-phase liquid density and concentration

The invention aims to provide an ultrasonic array detection method for multi-phase liquid density and concentration. The method is applied to detecting the properties of density and concentration of multi-phase liquid in real time, and can be widely applied to a plurality of fields such as the flight and aviation field, the industrial machinery field, the chemicals field, the water conservation field and the biomedicine field and the like. The ultrasonic array detection method for the multi-phase liquid density and the concentration comprises the following steps: vertically emitting an ultrasonic wave beam into a multi-phase liquid; receiving reflected or projected ultrasonic signals from the inside of the multi-phase liquid through an ultrasonic transducer array; and calculating the acoustic impedance of the multi-phase liquid and the spreading speed of the sound wave in the multi-phase liquid, as well as obtaining and displaying the property parameters of the multi-phase liquid in real time such as density and concentration and the like.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Complex air mixing device for subway air conditioner

The invention discloses a complex air mixing device for a subway air conditioner. The complex air mixing device comprises a shell and a filter system, the shell is provided with a fresh air port, an air return port and an air outlet, and the filter system comprises a primary filter section, a secondary filter section, an electret filter section and an electrostatic filter section. The primary filter section and the secondary filter section are arranged at the fresh air port, the electret filter section is arranged at the air return port, and the electrostatic filter section is arranged at the air outlet. A power supply module is arranged on the top wall of the shell, and a particulate matter concentration detector is arranged in the shell, electrically connected with the power supply module and positioned between the electret filter section and the electrostatic filter section. The complex air mixing device is capable of efficiently filtering fine particulate matters in fresh air and returned air and has bactericidal, sterilizing and odor eliminating functions to truly guarantee physical health of passengers in carriages. In addition, the complex air mixing device has a synchronous detection function, electric energy distribution and energy saving are realized, completeness of an air conditioner set can be guaranteed, and convenience in assembly and utilization is achieved.
Owner:CHONGQING JIAOTONG UNIVERSITY

Stirring device and urea machine with same

The invention provides a stirring device and a urea machine with the same. The stirring device comprises a stirring tank and a concentration detection pipeline, wherein the stirring tank is provided with a solution outlet part and a solution recycling opening; one end of the concentration detection pipeline is connected with the solution outlet part; the other end of the concentration detection pipeline is connected with the solution recycling opening, and is used for detecting the concentration of a solution in the concentration detection pipeline in order to judge the concentration of the solution in the stirring tank, and conveying the solution in the concentration detection pipeline back into the stirring tank through the solution recycling opening. By adopting the stirring device, theproblem of difficulty in controlling the concentration of a urea solution in the prior art is solved.
Owner:ZHUHAI GREE INTELLIGENT EQUIP CO LTD +1

Positive pressure explosion-proof system control method

The invention discloses a positive pressure explosion-proof system control method and belongs to the technical field of explosion prevention. After a first air source fan and a first electric valve are started, only when the concentration detected by each first gas detector is smaller than a first preset concentration, the concentration detected by the second gas detector is smaller than a secondpreset concentration, the pressure detected by the first pressure detector is smaller than a first preset pressure and / or the pressure detected by the second pressure detector is smaller than a secondpreset pressure, the concentration detected by the second gas detector is smaller than the second preset concentration; if not, a second air source fan is started, and a second electric valve is started; when the concentration detected by the at least one first gas detector is greater than or equal to a first preset concentration or the concentration detected by the second gas detector is greaterthan or equal to a second preset concentration, an alarm is given and the working device is turned off. According to the method, air can be supplemented through the second air source fan, continuousair supply of the air supply unit is ensured, the explosive gas concentration of air inlets of the two air source fans and the explosive gas concentration in the positive-pressure explosion-proof cavity are detected, and potential safety hazards are eliminated.
Owner:ESURGING TIANJIN TECH CO LTD

Grouting device for hydraulic engineering construction

The invention discloses a grouting device for hydraulic engineering construction. The grouting device comprises a pulping device, wherein an up-down reciprocating device is arranged in the pulping device. Through the pulping device, the grouting device can prefabricate slurry in advance, the concentration of the slurry is convenient to change, the situation that the grouting process is interrupted due to the change of the concentration of the slurry is avoided, and the grouting efficiency is improved; through the cooperation of the pulping device, the up-down reciprocating device, a weighing device, an accommodating device and a linkage device, the grouting device can detect the concentration of the prefabricated slurry in real time, water and aggregate with specified proportional quantity do not need to be manually measured, the workload is small, the accuracy is high, and the grouting efficiency and quality are improved; and through a discharging device, the prefabricated slurry can be put into grouting operation; through the cooperation of the pulping device, a beating device and a transmission device, the aggregate can be gradually scattered into water in a waterfall mode, the water and the aggregate can form homogeneous slurry, and the practicability of the grouting device for hydraulic engineering construction is improved.
Owner:付建利

Vibration alarming-based in-car CO concentration monitoring system

The invention discloses a vibration alarming-based in-car CO concentration monitoring system. The vibration alarming-based in-car CO concentration monitoring system comprises a car-mounted computer for integrally controlling and analyzing processing signals, a CO detecting module for detecting in-car CO concentration, a power module for supplying power for every module, a car frequency converter for outputting variable frequency voltage, a vibration alarming module for issue vibration alarm, and a car air-conditioner, wherein the CO detecting module transmits signals to the car-mounted computer through a CAN (controller area network) bus; the car-mounted computer controls and is connected with the car frequency converter, the vibration alarming module and the car air-conditioner; the poweroutput end of the power module is connected with the input ends of the car-mounted computer and the car frequency converter; the output end of the car frequency converter is connected with the inputend of the vibration alarming module.
Owner:成都纽扣互动科技有限公司

Preventing system based on in-vehicle CO concentration monitoring

The invention discloses a preventing system based on in-vehicle CO concentration monitoring. The preventing system comprises a vehicular computer, a CO detecting module, a power module, an automobilefrequency converter, a vehicular air conditioner, an automobile window regulating module and a seat regulating module, wherein the CO detecting module transmits data signals to the vehicle computer through CAN bus; the control output end of the power module is connected with the input ends of the automobile frequency converter, the vehicular air conditioner, the automobile window regulating moduleand the automobile seat regulating module; the power output end of the power module is connected with the power input ends of the vehicular computer and the automobile frequency converter; the outputend of the automobile frequency converter is connected with the power input end of the vehicular air conditioner. The preventing system has the advantages that in-vehicle CO concentration can be detected in real time, an intelligent automobile window controller is controlled to open automobile windows when the in-vehicle CO concentration reaches a preset value, the air blowing intensity of the vehicular air conditioner is controlled to increase at the same time to achieve air convection between the in-vehicle air and the air of an external environment, and the in-vehicle CO concentration is kept lower than a lowest CO poisoning threshold.
Owner:成都纽扣互动科技有限公司

Desulfurization, denitrification and white smoke elimination device for ultralow emission of sintering machine flue gas and process thereof

The invention provides a desulfurization, denitrification and white smoke elimination device for ultralow emission of flue gas of a sintering machine and a process thereof. The device and the processare high in desulfurization, denitrification and dust removal efficiency and stable in long-term operation, reduce energy consumption and satisfy ultra-low emission requirements of sintering machinesand sintering agglomerates in the iron and steel industry. A double-tower device in a desulfurization system is subjected to desulfurization efficiency improvement and transformation, so that the ultra-low emission index of SO2 is achieved; a spiral-flow type efficient dust-removing demister and a wet type electric dust remover are arranged at the upper part of the secondary absorption tower, so that pollutants such as smoke dust, slurry fog drops, SO3 and heavy metals in the flue gas are effectively removed, and the ultralow emission index of the smoke dust is achieved; the denitration systemadopts a medium-low temperature SCR (Selective Catalytic Reduction) process, ammonia gas and NOx are subjected to a redox reaction under the action of a catalyst, NOx is reduced into N2 and H2O, andthe ultralow emission index of NOx is achieved.
Owner:YANGCHUN NEW STEEL CO LTD

Novel permeable reactive barrier device for acidic mineral water treatment and filler

The invention belongs to the technical field of permeable reaction devices, and particularly relates to a novel permeable reactive barrier device with a multi-section spliced structure for acid mine water treatment and filler. The reactive barrier device is formed by connecting a plurality of sections of barrier bodies, an inverted trapezoidal water channel is arranged in the middle of each barrier body, a plurality of slots are evenly formed in the wall in each water channel, and filtering plates are movably arranged in the slots. The filler is novel composite filler composed of fly ash, nanoferroferric oxide and quartz sand. The novel permeable reactive barrier filler is used for treating acidic mineral water, and the novel permeable reactive barrier device with a multi-section splicedstructure can be used for treating various types of water pollution.
Owner:SHANXI UNIV

Highly selective catalytic fuel cell based on mixed liquid and application thereof

The invention relates to the technical field of fuel cells, and in particular to a highly selective catalytic fuel cell based on mixed liquid and application thereof. The highly selective catalytic fuel cell based on mixed liquid includes a battery body, an oxidation electrode, a reduction electrode and a circuit system, the battery body is formed with a reaction chamber used for receiving a fuelsolution, and the oxidation electrode and the reduction electrode are arranged in the reaction chamber, the oxidation electrode catalyzes the fuel solution to generate the oxidation reaction, the reduction electrode catalyzes the oxidation reaction of the fuel solution, and the electrons generated by the oxidation electrode are transmitted to the reduction electrode through the circuit system. Inthe invention, a proton exchange membrane is not required for isolation of the reaction chamber so as to simplify the battery structure, reduce the battery weight and improve the catalytic efficiency.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Device and method for detecting concentration of particulate matters in air

This disclosure relates to a device and a method for detecting concentration of particulate matters in air. The device includes a first vibration sensing apparatus, which works according to an exciting signal; a filtering apparatus, which is arranged on the first vibration sensing apparatus and is used for filtering air so that the particulate matters and gases within a certain particle size range in air enter the first vibration sensing apparatus, wherein the dynamic characters of the first vibration sensing apparatus are changed under influence of the particulate matters. The concentration of the particulate matters is determined according to a data representing the dynamic characters of the first vibration sensing apparatus, and the data is outputted by the first vibration sensing apparatus.
Owner:XIAMEN NIELL ELECTRONICS

Air purification treatment equipment with formaldehyde concentration detection function and use method thereof

The invention discloses air purification treatment equipment with a formaldehyde concentration detection function and a use method thereof. The air purification treatment equipment comprises a box body; a first air pump is fixedly connected to the center of the top of the box body; the bottom of the first air pump communicates with a second pipeline, the bottom of the second pipeline communicateswith the top of the box body, the top of the first air pump communicates with a first pipeline, a baffle is fixedly connected between the tops of the two sides of an inner cavity of the box body, a through groove is formed in the bottom of the baffle, and the top of the inner cavity of the baffle is movably connected with a shell. The air purification treatment equipment has the advantages of being good in sterilization and disinfection effect and generally having no humidification function; the problems that an existing air purification treatment device with the formaldehyde concentration detection function is generally only used for filtering and removing air impurities, the sterilization effect on air is general, bacteria in the air cannot be effectively killed, the humidification function is generally not achieved, and certain inconvenience is easily caused to a user in use are solved.
Owner:俞高雄

Test device for determining efficiency of adsorbent

The invention discloses a test device for determining the efficiency of an adsorbent. The test device comprises an oil-gas generation unit for generating and outputting oil gas, an adsorption unit, atail gas treatment unit and a concentration detection unit. The adsorption unit comprises an adsorption column and a weight sensor, the adsorption column is located at the downstream of the oil-gas generation unit, and an oil-gas inlet of the adsorption column communicates with the output end of the oil-gas generation unit to adsorb oil in oil gas; the weight sensor is connected below the adsorption column to bear the adsorption column and is used for detecting the weight of the adsorption column in real time. The tail gas treatment unit is positioned at the downstream of the adsorption unit and communicated with the oil-gas outlet of the adsorption column. The concentration detection unit is communicated with the oil gas outlet and used for receiving the tail gas in real time and detecting the oil concentration in the tail gas in real time. According to the test device for measuring the efficiency of the adsorbent, the adsorption capacity of the adsorption column and the concentrationof adsorbed oil gas can be measured in real time, and then two kinds of data can be comprehensively compared, so that the detected efficiency of the adsorbent is more comprehensive and accurate.
Owner:NO 711 RES INST CHINA SHIPPING HEAVY IND GRP +1

Composite air mixing device for subway vehicle air conditioner

The invention discloses a complex air mixing device for a subway air conditioner. The complex air mixing device comprises a shell and a filter system, the shell is provided with a fresh air port, an air return port and an air outlet, and the filter system comprises a primary filter section, a secondary filter section, an electret filter section and an electrostatic filter section. The primary filter section and the secondary filter section are arranged at the fresh air port, the electret filter section is arranged at the air return port, and the electrostatic filter section is arranged at the air outlet. A power supply module is arranged on the top wall of the shell, and a particulate matter concentration detector is arranged in the shell, electrically connected with the power supply module and positioned between the electret filter section and the electrostatic filter section. The complex air mixing device is capable of efficiently filtering fine particulate matters in fresh air and returned air and has bactericidal, sterilizing and odor eliminating functions to truly guarantee physical health of passengers in carriages. In addition, the complex air mixing device has a synchronous detection function, electric energy distribution and energy saving are realized, completeness of an air conditioner set can be guaranteed, and convenience in assembly and utilization is achieved.
Owner:CHONGQING JIAOTONG UNIVERSITY

An Efficient Dust Monitoring System in Factory Workshop

The invention relates to an efficient monitoring system for factory workshop dust. The efficient monitoring system comprises a dust detecting device, a dust image processing module, a control module, a dust processing device and an alarming module, wherein a rotatable camera is adopted as the dust detecting device and is used for collecting the dust image in a workshop; the dust image processing module is used for processing, cutting and recognizing the dust image so as to calculate the dust content in the workshop; when the dust content in the workshop exceeds standard, the alarming module is driven to alarm; and the control module is arranged in a monitor room and is used for controlling the dust detecting device, the dust processing device and the alarming device. The efficient monitoring system for factory workshop dust disclosed by the invention has the beneficial effects that the efficient monitoring system for factory workshop dust provided by the invention is capable of detecting the dust concentration in the factory workshop in real time, alarming and reminding when the dust content in the workshop exceeds standard, using the dust processing device for effectively processing the workshop dust and achieving the purpose of monitoring the workshop dust.
Owner:JIANGSU XIYI HIGH NEW DISTRICT TECH DEV CO LTD

Smoke and sewage separation pipe

The invention relates to a smoke and sewage separation pipe. A shelter plate is arranged in the pipe to separate smoke from sewage in the pipe. The separation pipe comprises a conveying pipe for conveying a smoke-steam mixture, a sewage discharge pipe, the shelter plate and a control unit, wherein the sewage discharge pipe is arranged at the bottom of the conveying pipe and used for discharging sewage out of the conveying pipe; the shelter plate is arranged at the bottom of the conveying pipe and located at the upstream of the sewage discharging pipe, and is used for blocking sewage in the smoke-steam mixture and separating smoke from the sewage; the control unit is arranged on the outer wall of the conveying pipe and used for adjusting the angle of the shelter plate. The shelter plate isarranged in the conveying pipe, the sewage in the smoke-steam mixture is attached to the shelter plate and condensed into water drops, which are directly discharged through the sewage discharging pipe, so that the smoke and the sewage in the smoke-steam mixture can be quickly and efficiently separated; besides, the separation pipe has simple structure, and the manufacturing cost is reduced while separation efficiency is ensured.
Owner:启明星宇节能科技股份有限公司

Dehumidifier

The invention provides a dehumidifier. The dehumidifier includes a machine body, a compressor, an air discharging assembly and a concentration detection module. A mounting chamber is arranged in the machine body; the compressor is mounted in the mounting chamber; the air discharging assembly is provided with an air discharging channel, and the air discharging channel communicates with the mountingchamber, so that airflow in the mounting chamber can be discharged through the air discharging channel; at least partial concentration detection module is mounted in the mounting chamber, the concentration detection module is used to detect the concentration of refrigerant in the mounting chamber, and the air discharging channel is controlled to turn on or turn off according to the concentrationof the refrigerant in the mounting chamber. The dehumidifier is to solve the problem that the safety performance of a dehumidifier is low in the prior art.
Owner:GREE ELECTRIC APPLIANCES INC

Smart grain storage warehouse

The invention relates to an intelligent grain storage warehouse. The device comprises a main body, a multidirectional detection mechanism, a control mechanism and an insect trap, the multidirectional detection mechanism and the insect trap are arranged in the main body; the optimal gas concentration is obtained through the insect trap; the multidirectional detection mechanism detects the gas concentration, temperature and humidity in the granary, the control mechanism is used for controlling the gas concentration, temperature and humidity in the granary, and a camera device for detecting the environment in the main body is further arranged in the main body; by adopting the gas concentration sensor and the camera device, the optimal gas concentration of the insect dizziness can be calculated; the temperature and humidity detection device is used for detecting the temperature and the humidity of each area block, the air-conditioning gasification device, the air conditioner and the dryer are controlled through the single-chip microcomputer control module, and the concentration, the temperature and the humidity of gas in the adjusting bin tend to be stable. Dynamic states of insects in the whole granary are monitored in real time, and the insects are killed by trapping or controlling gas concentration in the granary.
Owner:HANGZHOU NORMAL UNIVERSITY

A liquid substance proportional mixing device and its proportional mixing method based thereon

The invention discloses a liquid substance proportional mixing device and a proportional mixing method based thereon, and relates to the technical field of liquid substance mixing. The invention includes a raw liquid storage tank and a mixing tank, a pipeline A is communicated between the raw liquid storage tank and the mixing tank, and a plunger pump is arranged on the pipeline A; a liquid level sensor is arranged in the mixing tank, and a water inlet is arranged on the top of the mixing tank, and the water inlet A water inlet valve is arranged on the mouth; a Y-shaped drainage pipe is arranged at the bottom of the mixing tank, and the three ends of the Y-shaped drainage pipe are respectively connected with a mixing tank, a drainage valve and a hose. a one-way valve, a first filter and a concentration detection module; and a liquid use device, the top of which is communicated with the mixing tank through a pipeline B. Through the use of a liquid level sensor, a concentration detection module and a PLC controller, the present invention detects the concentration of the disinfectant in real time, and controls the incoming water and the original slurry of the disinfectant to ensure that the concentration of the disinfectant in the mixing tank is within a certain range.
Owner:HEFEI ZHONGCHEN LIGHT IND MACHINERY

A reaction device for the production of 2-methyl-3-trifluoromethylaniline

The invention relates to the technical field of chemical equipment, and discloses a reaction device for producing 2-methyl-3-trifluoromethylaniline, comprising a reaction kettle and a recovery box, the top of the recovery box is threadedly connected to the bottom of the reaction kettle, and the reactor is fixed on the reaction kettle A dropper, a feeding pipe and a feeding pipe are provided, the dropping pipe is arranged on the side wall of the reaction kettle, the feeding pipe and the feeding pipe are arranged on the peripheral wall of the reaction kettle, a stirring device is arranged in the reaction kettle, and the stirring device There is a transmission device on the top, a scraper ring is fixedly connected to the top of the transmission device, a chassis is fixedly connected to the bottom of the reactor, a layering device is fixedly installed on the chassis, and a dripping device is fixedly connected to the side of the drip tube far away from the reactor. The device includes a rubber hose, and the invention can decompose the dimethyl sulfate, avoid the harm caused by the strong toxicity of the dimethyl sulfate, and can scrape off the residue on the inner wall of the reaction kettle in time to avoid waste.
Owner:东营曜康医药科技有限公司

Medicine adding platform of plant protection unmanned aerial vehicle

The invention discloses a medicine adding platform of a plant protection unmanned aerial vehicle. A water pump is arranged above the right side of a mixing box and a motor is arranged above the middleof the mixing box; a concentration detector is arranged at the left side of the mixing box and a liquid medicine box is arranged in the middle of the left side wall of the mixing box; universal wheels are arranged at the two sides of the bottom of the mixing box and a battery pack is arranged right under the mixing box; a landing table is arranged above a top supporting frame and the landing table is connected with the top supporting frame by springs; a medicine adding device consisting of a steering engine, a flexible pipe and a guiding pipe is arranged in the middle of the right side ofthe top supporting frame. The medicine adding platform has the beneficial effects that the concentration of the liquid medicine in the mixing box can be detected in real time by the concentration detector, so that errors in human estimation are prevented; it can be automatically detected whether an unmanned aerial vehicle lands on the landing table by an infrared sensor, so that the manpower is saved; the liquid medicine can be sufficiently stirred at short notice by a screw propeller; and the impact of the unmanned aerial vehicle on the landing table during landing can be reduced by the springs, so that the safety of the unmanned aerial vehicle is protected.
Owner:成都智鼎航达科技有限公司

High-selectivity catalytic fuel cell and application thereof

PendingCN110416580AHigh catalytic efficiencyAvoid the defects of low catalytic efficiencyCell electrodesStationary system fuel cellsFuel cellsHydrogen
The invention relates to the technical field of fuel cells, in particular to a high-selectivity catalytic fuel cell and application thereof. The high-selectivity catalytic fuel cell comprises a cell body, an oxidation electrode, a reduction electrode, a proton exchange membrane arranged between the oxidation electrode and the reduction electrode and a circuit system. The proton exchange membrane separates the cell body into an oxidation chamber and a reduction chamber. The oxidation electrode is arranged in the oxidation chamber. The reduction electrode is arranged in the reduction chamber. The oxidation chamber is used for receiving an energetic agent and the oxidation electrode catalyzes the oxidation reaction of the energetic agent. The reduction chamber is used for receiving an oxidantand the reduction electrode catalyzes the reduction reaction of the oxidant. The electrons generated by the oxidation electrode are transferred to the reduction electrode via the circuit system. Theenergetic agent and the oxidant are pumped directly into the oxidation chamber and the reduction chamber respectively. The energetic agent is directly contacted with the oxidation electrode. The hydrogen ions generated by the energetic agent catalyzed by the oxidation electrode enter the reduction chamber directly through the proton exchange membrane so as to improve the catalytic efficiency.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Medical electric tool sterilizing bag for orthopedics department

The invention discloses a medical electric tool sterilizing bag for the orthopedics department. The medical electric tool sterilizing bag comprises a bag body, foam and concentration measuring instruments. The foam is pasted to the inner wall of the bag body, disinfectant is arranged inside the foam, and the bag body comprises a vertical bag body and a horizontal bag body. An electric tool handle and an electric tool shell are sleeved with the vertical bag body and the horizontal bag body respectively. The vertical bag body and the horizontal bag body are connected through a vacuum zipper, the concentration measuring instruments are arranged at the foam positions inside the vertical bag body and the horizontal bag body respectively, a steel ring is installed at the connecting position of the left side of the horizontal bag body and the electric tool shell through an asbestos pad, six through holes with threads are formed in the radial direction of the steel ring, and the steel ring is locked through screws via the through holes. As the electric tool handle and the electric tool shell are sleeved with the sterilizing bag in an attached mode, it is only needed to sterilize an electric tool head and a connecting device, exposed outside, of an electric tool after the electric tool is used, using is convenient, time and labor are saved, and the labor intensity of an operator is low.
Owner:WUHU RUIJIN MEDICAL EQUIP

Device for detecting concentration of target substance in seawater

The invention belongs to the field of marine environment monitoring, and discloses a device for detecting the concentration of a target substance in seawater, which comprises a pressing ring, a front cylinder, a rear cylinder and a rear end cover which are connected in sequence, an optical glass window is arranged between the pressing ring and the front cylinder; a fluorescent probe is arranged in the front cylinder; an incidence channel and a detection channel are formed in the fluorescent probe, an incidence unit is arranged in the incidence channel, the incidence unit comprises a light source converging lens and a light source which are sequentially arranged, a detection unit is arranged in the detection channel, and the detection unit comprises a fluorescent light collecting lens, an optical filter and a fluorescent light detector which are sequentially arranged; a target substance concentration detection circuit is arranged in the rear cylinder, a mounting hole is formed in the rear end cover, a connector is arranged in the mounting hole and extends into the rear cylinder to be connected with the target substance concentration detection circuit, the center wavelength of the light source is the fluorescence excitation wavelength of a target substance, and the center wavelength of the optical filter is the center wavelength of excitation fluorescence of the target substance. Miniaturized design of the whole detection device is achieved, operation is easy and convenient, and use is convenient.
Owner:OCEAN UNIV OF CHINA

Cooling liquid for diamond wire cutting circulation system and preparation method and use method thereof

The invention relates to a cooling liquid for a diamond wire cutting circulation system and a preparation method and a use method thereof. The cutting liquid is mainly prepared by the following components: 10-30 part by weight of modified polyether; and the balance of water, wherein total weight part is 100. By implementing the embodiment of the invention, the cooling liquid has the following beneficial effects that the cooling liquid has a low-foam self-defoaming function, and a defoaming agent component does not need to be additionally added; a thioether group is introduced into a polyether structure so that the modified polyether has relatively low dynamic surface tension and extremely strong wetting ability and adsorption and dispersion performance, and the process is a better spraying circulation cutting process, the product structure system is stable, and the thioether structure has relatively strong antibacterial performance, and is more suitable for a cooling liquid large circulation system; and the problem of influence on cutting production due to bacteria growth of water in the existing circulation system is well controlled.
Owner:武汉宜田科技发展有限公司

A control method for a positive pressure explosion-proof system

The invention discloses a positive pressure explosion-proof system control method and belongs to the technical field of explosion prevention. After a first air source fan and a first electric valve are started, only when the concentration detected by each first gas detector is smaller than a first preset concentration, the concentration detected by the second gas detector is smaller than a secondpreset concentration, the pressure detected by the first pressure detector is smaller than a first preset pressure and / or the pressure detected by the second pressure detector is smaller than a secondpreset pressure, the concentration detected by the second gas detector is smaller than the second preset concentration; if not, a second air source fan is started, and a second electric valve is started; when the concentration detected by the at least one first gas detector is greater than or equal to a first preset concentration or the concentration detected by the second gas detector is greaterthan or equal to a second preset concentration, an alarm is given and the working device is turned off. According to the method, air can be supplemented through the second air source fan, continuousair supply of the air supply unit is ensured, the explosive gas concentration of air inlets of the two air source fans and the explosive gas concentration in the positive-pressure explosion-proof cavity are detected, and potential safety hazards are eliminated.
Owner:ESURGING TIANJIN TECH CO LTD
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