185results about How to "High input cost" patented technology

The invention discloses key equipment applied to the pressure test operation of a deep sea oil and gas pipeline. The key equipment comprises a pressure test regulation and control system, a chemical agent injection system, a data collection and transmission system, a pressure maintaining control system, an auxiliary system, an immersed sea water filter, an underwater pressure testing pump, an underwater throttling and control system, an underwater flowmeter, an underwater pressure gage and a pressure sensor, wherein all above systems are designed according to the application of a water depth which is greater than 2000m, the requirements of underwater antiseptic materials are met, the above systems are connected through skid-mounted modules, and the above systems are externally provided with a protection frame of a frame type structure. By use of the key equipment, all underwater arrangement of pressure test operation equipment can be realized, the defects of more ground equipment, large space occupation, high input cost, more high-pressure potential safety hazards and the like in a conventional pigging operation are reduced, and pressure test operation efficiency of a deep water pipeline is improved.

The invention discloses a laser direct plate marking device for a plane screen print plate and device. The device comprises a screen frame for screen printing, a screen mesh stretched on the screen frame for screen printing, wherein the bottom of the screen mesh is coated with a photosensitive material coating, an optical component arranged below the screen frame for screen printing and used for performing exposure treatment on the photosensitive material coating, a scanning trolley for driving the optical component to reciprocate on the horizontal surface, and a longitudinal moving member for driving the optical component to shuttle on the horizontal surface; and the optical component comprises a plurality of lasers arranged on the same horizontal surfaces, the plurality of lasers are arranged on the same straight line parallel to a longitudinal central line of a rectangular screen frame from front to the back. The method comprises the following steps of confirming a control parameter of a mechanical structure, confirming a control parameter of a laser, and exposure imaging. The device disclosed by the invention is reasonable in design, low in investment cost, simple for use and operation, good in use effect, and wide in application range, and can be used for finishing the print plate manufacturing process of a screen frame in different sizes.

The invention relates to a preparation method for a high-activity humic acid biofertilizer. The high-activity humic acid biofertilizer comprises 97-99% of humic acid bio-organic fertilizer, 0.2-3% of special functional bacteria, and 0.1-0.3% of activator. The high-activity humic acid biofertilizer has high quality of organic matter nutrient, is excellent in soil conditioning function, has stable effect and long fertilizer efficiency, has balanced and complete nutrient, comprises multiple inorganic components needed by crops, has high fertilizer efficiency and can promote the growth of the crop and improve the yield and quality, has good disease resistance effect, improves the root system environment of the crop, improves the nutrient absorption of the crop, develops the root system of the crop, and enhances the stress resistance of the crop. After the high-activity humic acid biofertilizer is used by a peasant, a good planting effect can be obtained, and the yield and income are increased, so that the high-activity humic acid biofertilizer is used for producing environment-friendly and organic food.

The invention relates to an active thermal control focusing device for a space camera. The device comprises a secondary mirror component and a focusing component, wherein the secondary mirror component comprises a secondary mirror chamber (1), a secondary mirror pressure ring (2) and a secondary lens (3); the focusing component comprises a heatproof mat (4), an invar steel column (5), an aluminum ring (6), a heating piece (7), a radiator (8) and a thermistor (9); the secondary lens (3) is tightly pressed in the secondary mirror chamber (1) through the secondary mirror pressure ring (2). The device has the advantages of consistency with a space using condition, stable performance, high accuracy and reliable structure.

The invention discloses a continuous rigid frame bridge based on a steel truss-concrete slab composite beam. The continuous rigid frame bridge comprises a bridge substructure and the steel truss-concrete slab composite beam supported by the bridge substructure. The steel truss-concrete slab composite beam comprises a steel truss and a concrete bridge deck which is laid over the steel truss. The steel truss comprises one or more steel truss units; each steel truss unit is an inverted-triangle truss girder, wherein the inverted-triangle truss girder is composed of two upper chords, a lower chord, a left line of diagonal web members and a right line of diagonal web members, each upper chord comprises a first horizontal steel plate and a plurality of first vertical perforated steel plates evenly laid on the first horizontal steel plate, an upper chord transverse connecting system connected between the two upper chords comprises a plurality of upper chord transverse connecting pieces, and each upper chord transverse connecting piece comprises a second horizontal steel plate and a plurality of second vertical perforated steel plates evenly laid on the second horizontal steel plate. The continuous rigid frame bridge is simple in structure, reasonable in design, convenient to construct, good in stress performance, good in using effect and capable of effectively solving various problems existing in an existing continuous rigid frame bridge.

The invention relates to an electromagnetic mechanical gripper device which comprises an electromagnetic suction, a mounting seat, supporting rods, crank rockers, rotary grippers, movement connecting rods, springs and a driving rod and is characterized in that the mounting seat is fixed to manipulators; the electromagnetic suction is installed on the manipulators; in addition, a suction region of the electromagnetic suction is arranged aligning to a middle hole of the mounting seat; the driving rod penetrates through a through hole formed in the lower end of the mounting seat; the upper side of the driving rod is in a three arris shape and is provided with three hinging points which are used for being hinged to the three supporting rods separately; the middle parts of the supporting rods are hinged to the three movement connecting rods separately; the springs are installed on the movement connecting rods after the movement connecting rods penetrate through the mounting seat; then the movement connecting rods are hinged to the driving rod separately; the three rotary grippers are hinged to the mounting seat in a centering manner; and eccentric hinging holes are formed in the hinging parts of the rotary grippers and the mounting seat separately and are hinged to the tail ends of the supporting rods together separately. The electromagnetic mechanical gripper device has the beneficial effects that when the electromagnetic suction is not electrified, the gripper is in an opening posture; when the electromagnetic suction is electrified, the driving rod moves upward, the springs are compressed to drive the three rotary grippers to move, and grabbing is realized.

A fermenting pool for treating garbage (city's life garbage) to generator marsh gas features structurally that it has 4 mechanisms respectively used for pulverizing big organic material particles, automatically separating and collecting the inorganic substances, using solar energy or marsh gas to heat the liquid material, and generating the thermal insulation effect by use of air, vacuum and insulating material. Its advantage is short period.

A double shoot seed and fertilizer placement unit has a leading shank that cuts a fertilizer trench in the soil, a seed shovel immediately behind but above the lower extremity of the shank to cut one or more seed shelves in the soil above and outboard of the fertilizer trench, a boot behind the shovel that places seeds on the shelf and then drops fertilizer into the fertilizer trench between and below the seeds, and a fertilizer guide member that rides in the fertilizer trench below the fertilizer outlet to maintain the integrity of the trench in preparation for the fertilizer and helps guide the fertilizer down to the bottom of the trench as it emanates from the boot.

The invention relates to a textile machine, specifically a straight servo control guide bar shogging system of warp knitting machine. The straight servo control guide bar shogging system of warp knitting machine in the invention uses fieldbus technology, the system architecture is three-level network distributed control system based on CAN bus, among them, the first level is management layer, the central controller is IPC machine used for inputting pattern schema, controlling production, proofing and detecting pattern schema data, network communication; the second level is control layer which is the separated independent control unit composed by embedded microcontroller, it is used for receiving and storing the pattern schema parameters relative with rack knitting and transmitted by IPC and completing parameter proofing and detecting associated with IPC; the third level is on-site layer which includes servo driver, cylindrical straight servo motor, linking devices and rack, it can drive guide bar based on the order signals transmitted from control layer. The invention has the characteristics of accurate control, convenient and fast pattern schema replacement and high speed of pattern schema replacement, it can produce products with various pattern schemas and increase warp knitting production efficiency greatly.

A double shoot seed and fertilizer placement unit has a leading shank that cuts a fertilizer trench in the soil, a seed shovel immediately behind but above the lower extremity of the shank to cut one or more seed shelves in the soil above and outboard of the fertilizer trench, a boot behind the shovel that places seeds on the shelf and then drops fertilizer into the fertilizer trench between and below the seeds, and a fertilizer guide member that rides in the fertilizer trench below the fertilizer outlet to maintain the integrity of the trench in preparation for the fertilizer and helps guide the fertilizer down to the bottom of the trench as it emanates from the boot.

The invention discloses a road surface obstacle clearing apparatus for municipal engineering bridge construction, which comprises a cleaning vehicle with a sloped headstock; a bodywork is provided with an opened concave groove; the opened concave groove is provided with a rectangular notch, a connecting hinge seat, a left support lug, a right support lug, and a dust collection pore; lights and obstacle avoidance sensing devices are arranged at the headstock and a tailstock; a water tank is arranged at the headstock with a first front sprinkler, a second front sprinkler, a left sprinkler, a right sprinkler, a first middle sprinkler, a second middle sprinkler, and a sprinkling electromagnetic valve mounted thereon; the opened concave groove is provided with a rotating disk mechanism; a chassis of the cleaning vehicle is provided with a mightiness dust exhaust device and a universal camera; the tailstock is provided with a dustbin and a control bin; and left and right sides of the cleaning vehicle are provided with a cleaning assembly. The apparatus provided by the invention has the function of unmanned obstacle clearing, can automatically crush concrete blocks, automatically draw and take obstacles from bridge expansion joints, and take much rubbish by means of a diameter variable cleaning device, and can optimize construction steps at any time for more efficient and intelligent services.

The invention relates to a full face tunnel boring machine tunneling extrusion deformation machine jamming disaster safety control method. The method includes the steps of evaluating the surrounding rock extrusion deformation levels of a full face tunnel boring machine in the tunneling process; and determining different-combination tunneling and step-by-step joint surrounding rock support strategies according to the different extrusion deformation levels. By means of the method, reasonable calculation of the surrounding rock extrusion deformation levels can be achieved, and construction site operation and calculation are facilitated; reasonable tunneling parameter adjustment and step-by-step joint surrounding rock support control are carried out according to the surrounding rock extrusiondeformation degrees, machine jamming is avoided under the surrounding rock deformation working condition, smooth tunneling is ensured, delay of the construction period due to frequent downtime is avoided, the tunneling efficiency is better improved, material and labor cost increase caused by excessive supporting is avoided, and project construction is more economical and reasonable; and a varietyof support methods are organically combined, the effects of strengthening and supporting surrounding rocks are effectively improved, the restoration and improvement of the stress state of the surrounding rocks are realized, the self-bearing capacity of the surrounding rocks is improved, and the construction safety is greatly improved.

The invention discloses a domestic garbage treatment method and relates to the technical field of solid waste disposal. The domestic waste treatment method includes the following steps: S1, pretreating the domestic waste, breaking the bagged waste in the domestic waste, and stacking the broken bag in a fermentation tank; S2, fermenting The garbage accumulated in the tank is covered with a layer of expanded polytetrafluoroethylene composite film to form a closed space. Under aerobic conditions, aerobic bacteria are used for 14 to 17 days of static aerobic fermentation to reduce the moisture in domestic garbage. to 30% to 35%; S3, performing primary sieving treatment on the domestic garbage after aerobic fermentation in the step S2 to obtain the first-level sieve and the first-level sieve, and the first-level sieve The material and the undersize of the primary sieve are recycled separately. The beneficial effect of the invention is that the domestic waste can be decomposed and dried at low cost, the water content in the domestic waste can be reduced, the process is simplified, and the system investment and operation cost are reduced.

The invention discloses an energy-saving glass fiber and magnesium composite air duct manufacture and installation method. An energy-saving glass fiber and magnesium composite air duct is manufactured by assembling a plurality of sections of glass fiber and magnesium composite air duct sections. The method comprises the following steps of: 1, preparing before manufacturing; 2, manufacturing glass fiber and magnesium composite air duct sections, manufacturing a plurality of sections of glass fiber and magnesium composite air ducts in which upper plates and lower plates as well as left plates and right plates are malposed by adopting the glass fiber and magnesium composite air ducts and adhering glue; and 3, assembling and installing the energy-saving glass fiber and magnesium composite air duct: assembling all finished glass fiber and magnesium composite air duct sections and obtaining the integral energy-saving glass fiber and magnesium composite air duct. The invention has the advantages of simple manufacture process, convenient construction, low labor intensity and high construction speed; and the manufactured energy-saving glass fiber and magnesium composite air duct has the advantages of reliable connection among all members and easy insurance of quality. Meanwhile, the investment of used machinery equipment during the construction is less, the cost input is low, the manufacture process greatly reduces adverse factors of noise, vibration, and the like, thus the method can be used for manufacturing various shapes and structures of glass fiber and magnesium composite air ducts.

The invention relates to an anti-counterfeiting structure for a bottle, which consists of a bottle body and a bottle cover and is characterized in that the outer side wall of the bottleneck of the bottle body is provided with a plurality of ribs; the bottleneck is internally provided with an inner cork; the lower part of the bottle cover is connected on the internal thread of the inner cork in a tightening manner; the outer side parts of the bottleneck and the bottle cover are encircled by clasps; the clap comprises at least two semicycles, one pin hole is arranged at the joint part of two semicycles, and the pin hole is internally provided with pin bolts to connect each semicycle in an end-to-end manner to form clasps; and the side wall of the clasp is provided with a rib hole or a clipped groove matched with the rib, the outer side part of the bottle cover is provided with a shoulder, and the inner side wall above the rib hole or the clipped groove of the clasp is provided with a concave part matched with the shoulder. The invention integrates the anti-counterfeiting effects of the bottle cover, the inner cork and the bottle body dynamically and is provided with an anti-counterfeiting damage mark on the bottle body, thereby increasing counterfeiting difficulty and anti-counterfeiting cost and achieving and improving anti-counterfeiting effect.

The invention discloses a dynamic tomography system and method for a fully mechanized face near field coal rock under exploiting excitation of coal machine. The system comprises an array information synchronous acquisition device and a near-field coal rock tomography working station; the near-field coal rock tomography working station is connected to the array information synchronous acquisition device. The excitation source for vibration is a coal machine. The array information synchronous acquisition device comprises an exploiting position detection unit and two anchor rod vibration detection arrays that are uniformly arranged in a mining roadway. The system is simple in structure and reasonable in design. The system is also convenient to install and operate and is good in using effect. Taking a coal machine as an excitation source, the system makes good images. The invention further discloses a dynamic tomography method for a coal rock near a fully mechanized face under exploiting excitation of a coal machine; the method comprises following steps: 1) the anchor rod vibration detection units and the exploiting position detection units are deployed; 2) dynamic tomography for a coal rock near a fully mechanized face is done under an exploiting excitation of a coal machine. Such a method can be done with a few steps. Reasonably designed, the method can also be done very conveniently to provide dynamic chromatography imaging conveniently and quickly.

The invention provides a display system comprising a display chip, a first polarization beam splitter, a prism, a second polarization beam splitter, a reflection device, a projection lens and a conversion device. After light emitted by a light source passes through the first polarization beam splitter, P light in the light source enters the display chip. The display chip reflects the P light, the P light is converted into S light, and the S light enters the first polarization beam splitter. The first polarization beam splitter reflects the S light. When the conversion device is in a working state, the S light reflected by the first polarization beam splitter is converted into P light and the conversion device outputs the P light, or the polarization state of the S light reflected by the first polarization beam splitter does not change and the conversion device outputs the S light. When the conversion device outputs the S light, the S light is transmitted to the second polarization beam splitter through the prism. The second polarization beam splitter reflects the S light to the reflection device, and the S light is collimated and amplified by the reflection device and reflected to the human eye. When the conversion device outputs the P light, the P light passes through the second polarization beam splitter and enters the projection lens.

The invention discloses an engineering strain capable of producing high-content zeaxanthine or astaxanthin and application thereof. The engineering strain capable of producing the high-content zeaxanthine or astaxanthin carries a crtE gene, a crtB gene, a crtI gene, a crtY gene and a crtZ gene, wherein the copy number ratio of the crtY gene to the crtZ gene is preferably 1 to 2; the engineering strain capable of producing the high-content zeaxanthine or astaxanthin also carries at least one crtW gene, the copy number ratio of the crtW gene, the crtZ gene and the crtY gene is preferably 1 to 2 to 1; the used crtY gene and crtZ gene are preferably selected from pantoea ananatis, the crtW gene is preferably selected from brevundimonas, and plasmid-free engineering escherichia coli is preferably selected as the engineering strain. The content of the zeaxanthine or astaxanthin produced by the built engineering strain accounts for more than 90 percent of total carotenoids, the problems that the content of target products is low, the purification is difficult are solved, and the engineering strain can be applied to preparation of high-purity zeaxanthine or astaxanthin.

The invention provides a method for improving the pop strength of a paper sheet. The method includes the following steps that long fibers and short fibers are selected for use; a long fiber pulping line and a short fiber pulping line are adopted, the short fibers and long fibers are added in the short fiber pulping line, and only the long fibers are added in the long fiber pulping line; the added long fibber pulp accounts for the total amount of pulp by 55-60% in the long fiber pulping line and the short fiber pulping line, the balance is the short fiber pulp, and the long fiber pulp added in the short fiber pulping line accounts for the total amount of pulp by 25-30%; at least two pulping machines are arranged in series in each pulping line, and in the flowing direction of the pulp, power distribution proportions of all the pulping machines are set from low to high; on the premise that the ratio of net touch speed of the pulp to moving speed of a formation net is controlled to be larger than one, rotation speed of a pulp supplying pump is reduced. The invention further provides the paper sheet manufactured through the method. The method can achieve the purpose of improving the pop strength without increasing investment cost.

The invention provides a pH monitoring flat panel optrode fluorescence sensing film, as well as a preparation method and application thereof, and belongs to the field of monitoring of pH value two-dimensional distribution. The fluorescence sensing film is prepared from a fluorescent dye HPTS-lipo. In the preparation process, HPTS-lipo is embedded in a hydrogel D4. The fluorescent dye HPTS-lipo isprepared in such a way that a sulfonic acid group of the fluorescent dye HPTS-lipo is introduced in alkylamine. Based on modified fluorescent dye HPTS-lipo, and compared with a fluorescent dye HPTS, the pKA value is obviously increased, the fluorescence sensing film is suitable for monitoring different pH values, different experimental requirements are met, the fluorescent dye HPTS-lipo has higherhydrophobicity, and is kept for a longer time in an environment, and after embedding by the hydrogel D4, the problem of dye leakage is further solved.

The invention discloses a method for producing a semi-metallurgical metal composite tube through electric resistance welding. The method includes the steps that firstly, a base tube and a liner tube are machined; secondly, the base tube and the liner tube are assembled and mechanically composited to form a mechanical metal composite tube; thirdly, welding preparation of electric resistance welding is conducted, two electric resistance welding electrodes of an electric resistance welding machine are installed at the two ends of the mechanical metal composite tube respectively, one electric resistance welding electrode is installed on the extending section at one end of the liner tube, and the other electric resistance welding electrode is installed at one end of the base tube; fourthly, electric resistance welding is conducted, the base tube and the liner tube in the mechanical metal composite tube are welded through the electric resistance welding machine; and fifthly, subsequent machining is carried out. The method is simple in step, reasonable in design, convenient to implement, high in welding quality and good in use effect. Bonding strength between the base tube and the liner tube in the machined and formed semi-metallurgical metal composite tube is high. Besides, machining efficiency is high, and machining quality is easy to guarantee.

The invention provides a rescue mechanical device and a rescue mechanical system. The rescue mechanical device comprises a rescue device and a control device. The control device is used for controlling the rescue device to work according to received control commands, and the rescue device comprises a fixed end and multiple probes; one end of each probe is fixedly arranged on one side of the fixed end, a bent joint is arranged at the other end of each probe, and the bent joints are used for adjusting the bent degree of the probes according to the control commands sent by the control device. Each bent joint is provided with a self-locking device, and the bent joints are self-locked when being bent by a preset angle. The multiple probes of the rescue device are used for effectively rescuing rescued staff in real time, the bent joints are arranged at the free ends of the probes and are self-locked when being bent by proper angles, the rescued staff are prevented from falling off midway, the whole process is controlled by the control device (the control device has a whole-journey picture recording function and can achieve remote monitoring, talkback and control), and the rescue mechanical device is simple, convenient to use, and low in cost, and mainly is applied to rescue in irregular small-bore deep wells.

The invention discloses a commodity positioning detection re-identification method based on a feature map. According to the method, a dynamic mask subgraph and parallel feature graph matching method is adopted, the article overlapping detection is optimized, and the commodity recognition efficiency is improved. The method can be used for the commodity identification and settlement work in commodity settlement of supermarkets and sellers, the error rate is reduced, the labor cost is reduced, and the settlement efficiency is improved. By changing the input data, the method can be expanded to beapplied to other article detection fields.

The invention discloses a BBT interactive advertisement technology and a method for implementing the BBT interactive advertisement technology through an internet communication means and relates to the technical field of advertisement spreading and interacting. Users are registered, unique identifications of the users are obtained, an advertisement is registered, a unique identification of the advertisement is obtained, unique identification is carried out on a BBT interactive advertisement technology bearing platform, the advertisement comprising the advertisement ID is placed on the bearing platform comprising the platform ID, and the users watch and obtain the information; interaction is correctly carried out on the bearing platform in the mode set by an advertiser and the bearing platform; an interactive result is reported to a storage server platform and a manager; the server and the manager screen out the effectively interactive users according to the interactive rule set by the advertiser and the bearing platform in advance and feed back the related information to the advertiser. The BBT interactive advertisement technology and the method for implementing the BBT interactive advertisement technology through the internet communication means solve the problem that an advertisement publisher can not obtain the advertisement publishing effect in real time from an existing advertisement publishing mode, the advertisement publisher can master the advertisement volume information feedback in real time, and the advertisement publishing cost is lowered.

The invention discloses a modified cellulose acetate membrane for chiral resolution, a preparation method and application thereof, and belongs to the technical field of chiral resolution. The modifiedcellulose acetate membrane is prepared by taking a cellulose acetate membrane as a basilemma, beta-cyclodextrin or hydroxypropyl-beta-cyclodextrin as a chiral selector, and citric acid as a couplingagent. In a preparation process of the chiral cellulose acetate membrane, sodium hypophosphite is used as a catalyst, and the mass ratio of the beta-cyclodextrin, citric acid to sodium hypophosphite is (2 to 4) to (2 to 4) to (0.2 to 0.5). Racemic tryptophan and mandelic acid are used as resolution targets, the concentration of D-enantiomer and L-enantiomer in a filtrate and the concentration ratio of the two are monitored by high performance liquid chromatography, the prepared chiral membrane realizes that the number of layers required for tryptophan complete resolution is greatly reduced, and not only the resolution effect of tryptophan is excellent, but also the resolution effect of the enantiomer of mandelic acid is good, complete resolution can be performed, and a problem that an chiral membrane at the prior art has single resolution targets is overcome.

The invention discloses a steel box girder incremental launching construction method based on walking type three-dimensional hydraulic incremental launching equipment. The two ends of a construction steel box girder are each supported on a girder end pier, and the construction steel box girder is divided into a first girder body and a second girder body with a midspan pier being the boundary; incremental launching construction includes the steps that 1, temporary piers and midspan temporary piers are constructed; 2, incremental launching is conducted on the girder bodies synchronously throughthe walking type three-dimensional hydraulic incremental launching equipment; 3, midspan closing is conducted. The walking type three-dimensional hydraulic incremental launching equipment is adopted for conducting incremental launching on the two girder bodies synchronously until the two girder bodies of the constructed steel box girder are closed from two sides to the midspand; incremental launching of the walking type three-dimensional hydraulic incremental launching equipment is easy and convenient to control, multiple sets of walking type three-dimensional hydraulic incremental launching equipment can easily and conveniently act synchronously, incremental launching positions are arranged flexibility, a guide beam and a slideway beam used for longitudinal incremental launching are not needed, self-balance incremental launching is really realized, and the process of incremental launching is safe and reliable.

The invention discloses an efficient cost-saving citrus cultivation method. The efficient cost-saving citrus cultivation method comprises the steps: a method for reserving fruiting flower buds and fruiting mother branches in the next year is carried out, specifically, spring shoots are sprouted and picked once every year, and the fruiting flower buds are reserved; the shoots are sprout once, specifically, flower-free spring shoots are cultured as fruiting mother branches in the next year; a fertilizing method comprises the steps of applying root fertilizer and spraying foliar fertilizer, specifically, as for root fertilizer application, the root fertilizer is applied once within 20 days after blossom fall every year in the summer shoot period, as for foliar fertilizer spraying, the foliarfertilizer is sprayed in the spring shoot stage so as to promote and strengthen flowers and reduce the nutritional growth requirements of the spring shoots, the foliar fertilizer is sprayed in the summer shoot stage to supplement tree nutrition and reduce summer shoot sprouting, the foliar fertilizer is sprayed in the autumn shoot period and the winter shoot period so as to increase tree nutrition, control the shoots and promote blossom; and a pruning method comprises the step that uniform pruning is conducted once from October every year to February next year before the flowers bloom. Finally, eight outstanding effects of 'being free of sunlight bactericides, organic nutrient sources, young tree pruning, fruit bearing supporting, whitewashing, girdling, drip irrigation equipment and herbicides' and the like are achieved.

The invention discloses puffed pellet feed for grass carps and a preparation method thereof. The puffed pellet feed comprises following components by weight percent: 3.5% of imported fish meal, 6% of soya bean meal, 7% of peanut meal, 29% of rapeseed meal, 1.5% of spray-dried animal blood cells, 16% of No.4 powder, 12% of rice bran, 17.5% of wheat middling, 1.5% of soyabean lecithin, 5.0% of compound multi-vitamin and compound multi-mineral, 1.0% of an additive and 28% of feed protein. The feed disclosed by the invention is low in feed coefficient, safe and reliable to use, good for environmental friendliness and low in cost and is suitable for popularization and application.

The invention provides universal sensor control equipment and system. A data bus interface is used for receiving a setting command from an MCU, and transmitting the setting command to a master controller; the master controller sets current states of a data acquisition interface and a data acquisition device according to the setting command; the set data acquisition interface receives data information transmitted by sensors, and transmits the data information to the data acquisition device; the set data acquisition device transmits the received data information to the data bus interface through the master controller, so that the data bus interface transmits the data information to the MCU. According to the equipment and the system, by the interconnection and intercommunication of the data acquisition device and each sensor, various personalized transmitters are unified, investment cost is reduced, and the operation is simple; a working mechanism like that of a programmable logic controller is realized, universality for sensors and transmitters, correctness and low cost are achieved, and the equipment and the system play an important role in the interconnection of things, rapid application and market promotion.

The invention discloses an automatic fire extinguishing system for a belt conveyor based on distributed optical fiber temperature measurement technology. The automatic fire extinguishing system comprises a control host which is connected with a ground monitoring alarm center through a network switch to receive signals, connected with a distributed optical fiber temperature measurement system to monitor data, connected with a belt conveyor explosion-proof switch and a sound and light alarm to receive temperature signals and then control the belt conveyor explosion-proof switch to close the belt conveyor and start the sound and light alarm, and connected with an explosion-proof solenoid valve and a corresponding high-pressure water mist nozzle thereof through pipelines to control the explosion-proof solenoid valve to open or close the high pressure water mist nozzle. The high-pressure water mists are used for extinguishing the fire, water consumption is low, fire extinguishing effects are good, and the system effectively solves the practical problems of untimely fire extinguishing, low efficiency and poor effects of an existing underground coal mine belt conveyor.