34results about How to "Strong temperature" patented technology

The invention discloses an amplitude detection circuit with a direct current offset elimination function. The amplitude detection circuit has a differential structure, and consists of a direct current offset elimination circuit, an amplitude limiting amplification circuit, an amplitude detection circuit, a current addition circuit and a filtering circuit, wherein the direct current offset elimination circuit comprises a plurality of direct current offset suppressors with a low-pass filtering function; the amplitude limiting amplification circuit comprises a plurality of amplitude limiting amplifiers; and the amplitude detection circuit comprises a plurality of amplitude detection units. A differential radio frequency signal is amplified to be saturated by a plurality of stages of cascaded amplitude limiting amplifiers, the output of each stage of amplitude limiting amplifier is detected by the amplitude detection units, output detected amplitude values are transmitted to the current addition circuit for addition, and the sum is filtered by the low-pass filtering circuit to obtain output voltage related to the amplitude of the input signal. The circuit can be adapted to the requirements of high monolithic integration level of a radio frequency chip, and is applied to a high-integration level zero-intermediate frequency receiver with the requirement of signal amplitude detection.

The invention discloses a distributed strain and temperature optical fiber sensor based on brillouin scattering. The sensor comprises a light source, an electro-optical modulator, a pulse signal source, a first erbium-doped optical fiber amplifier, a second erbium-doped optical fiber amplifier, a circulator, a first optical coupler, a second optical coupler, double balance detectors, a signal processing system and a sensing optical fiber. The sensing optical fiber comprises a long period optical fiber grating and is an all-solid photonic crystal band gap optical fiber. Output light of the light source is divided into two paths, wherein one path of the output light is modulated to be detection pulse light by means of the electro-optical modulator, is amplified through the erbium-doped optical fiber amplifiers and is input into the sensing optical fiber through the circulator. The sensor can simultaneously obtain temperature and strain with high resolution through a single measurement, and can well solve the problem of cross sensitivity existing in measurement of a brillouin sensor.

The invention discloses an automatic loading system for a lithium battery. The automatic loading system for the lithium battery comprises a powder putting system, a solvent putting system, a stirringmachine, a transferring tank, a coating feeding system and a control system, wherein the coating feeding system comprises a diaphragm pump, an iron removing device, a coating storage tank, a coating die head and a return pipe arranged on the coating storage tank and connected to a pipe between the diaphragm pump and the transferring tank, a return pipe valve is arranged on the return pipe, and thecoating storage tank is provided with a stirring device and a non-contact liquid level sensor. During coating, when the liquid level in the coating storage tank reaches the certain height, a discharging valve of the transferring tank is automatically switched off, the transferring tank is vacuumized, then vacuum breaking and defoaming are carried out, the uniformity of coating slurry is guaranteed, and when the liquid level is lower than the certain height, materials are fed into the coating storage tank; when the system is stopped for a long time, the discharging valve of the transferring tank is automatically switched off, the return pipe valve is automatically switched on, automatic cycling of coating slurry in the transferring tank is achieved, and blocking caused by material accumulation and material drying is prevented.

The invention is applicable to the field of integrated circuits, and provides a multi-loop self-biasing phase-locked loop circuit and a clock generator. The circuit comprises a multi-phase output phase frequency detector, a reverse unit, a first charge pump, a second charge pump, a third charge pump, a switch unit, a voltage-controlled oscillator array and a frequency divider, wherein when a frequency difference between a signal output by the frequency divider and input reference frequency is less than a first threshold, the first and second charge pumps work simultaneously, the output current of the first charge pump is used for controlling a voltage-controlled oscillator to work so as to achieve output with a wide frequency range; the second charge pump and the third charge pump forms a control voltage on a second energy storage unit to control the current of the switch unit, so as to achieve dynamic adjustment of a ratio between the current of the chare pump and the current of the voltage-controlled oscillator. The multi-loop self-biasing phase-locked loop circuit provided by the invention has the advantages of being wide in application range, good in transportability, wide in input and output range and free from being affect by PVT, and having extremely strong capacity of resistant to technology, supply voltage and ambient temperature.

The invention discloses a corn starch adhesive and a preparation method thereof. The corn starch adhesive is prepared from corn starch, potassium permanganate, sodium hydroxide, borax, sodium thiosulfate, sodium bentonite and water. The preparation method comprises the following steps of: grinding and screening the sodium thiosulfate; preparing pasty corn starch in a constant-temperature water bath; mixing the water, the potassium permanganate and the screened sodium bentonite in the constant-temperature water bath, and pouring into the pasty corn starch to prepare mixed solution; adding water to dissolve the sodium hydroxide, the borax and the sodium thiosulfate, and pouring into the mixed solution to prepare the finished product. The preparation process is simple, and the conventional equipment is not needed to be changed; during production, the temperature is low, and the energy consumption is low; and the produced starch adhesive has the advantages of good liquidity, strong adhesiveness, quick drying, high stability, no pollution, and can greatly improve the ring crush compression resistance and the tension strength of corrugated paper.

The invention relates to a FeMnNi powder accelerant with low cost, wherein the alloy comprises the components in percentage by weight as follows: 30-50% of Mn, 0-10% of Ni, 1-3% of Cr, 0.1-0.8% of C, 0.05-0.2% of Si and the balance of Fe. The oxygen content of a powder accelerant product optimized is less than or equal to 300ppm, and the nitrogen content is less than or equal to 180ppm. The accelerant is prepared by a gas atomization process of inertial gas, so that the accelerant powder is spherical or approximately spherical with uniform alloy composition. Diamond synthesized by the accelerant and graphite in proportion is greyish-green or dark green in color, and the crystal form of the diamond is a polygonal aggregate in a granular structure. The per mixed unit yield reaches over 154 carat / block by cavity with diameter of 40mm, the static pressure strength is average about 20N, and the coarsness proportion of 80 / 100 reaches over 60%, so that the accelerant is an ideal raw material for manufacturing an efficient diamond grinding apparatus for crisp and hard materials.

The invention discloses a new process for comprehensive utilization of hazardous waste resources containing heavy metal. The process comprises the following steps of S1, the hazardous waste containing the heavy metal is subjected to pretreatment and classified storage; S2, the hazardous waste containing the heavy metal, coke powder, bentonite, quartz sand or lime are mixed with water to form a mixture; S3, the mixture is subjected to ball pressing and drying; S4, pellets enter a rotary kiln after being screened, and powder returns to the step S2; S5, the operation temperature of the rotary kiln is reduced, and flue gas is treated to produce primary soot containing zinc and lead and secondary zinc oxide; S6, kiln slag is subjected to hot conveying o a melting electric furnace for smelting, residual zinc and lead are subjected to secondary reduction to volatilize to enter the flue gas, iron, nickel, chromium and manganese are reduced to produce molten iron, and molten slag is subjected to hot conveying to a step S7 for hardening and tempering; S7, solid waste is added into a hardening and tempering electric furnace to conduct hardening and tempering on the molten slag; and S8, a mineral wool board is produced from the qualified quenched and tempered molten slag. According to the method, the technical problems that thorough harmlessness and recycling of Waelz kiln slag and a waste catalyst are difficult, and ring formation is prone to occurring in the Waelz kiln are solved.

The invention relates to a lignin modified phenolic resin and a preparing method thereof, and belongs to the technical field of phenolic resin. The lignin modified phenolic resin is prepared from, by weight, 50-70 parts of lignin, 100-150 parts of phenol, 2-25 parts of an acidic hemicellulose liquid, 50-100 parts of alkaline hemicellulose liquid, 10-50 parts of soft water, 50-70 parts of phytate phosphorus resin, 1-15 parts of zeolite solid acid, 40-190 parts of formaldehyde, 2-20 parts of gel-type ion exchange resin and 1-15 parts of a nanometer composite catalyst. The preparing method includes the steps that the lignin, the phenol, the hemicellulose liquid, the soft water, the phytate phosphorus resin and the zeolite solid acid are added into a reaction kettle and reacted, then the formaldehyde and the nanometer composite catalyst are added, the mixture is washed, dried and smashed, then the gel-type ion exchange resin is added, and the lignin modified phenolic resin is obtained. The lignin modified phenolic resin is good in stability and low in production cost, and has the excellent size stability, forming processing performance and fire resistance.

The invention discloses a harmless treatment method for retired lithium battery pyrolysis tail gas, which relates to the field of comprehensive recycling of waste lithium batteries. The harmless treatment method specifically comprises the following steps of crushing a retired lithium battery electrode material, putting the crushed retired lithium battery electrode material into a pyrolyzing furnace for air pyrolysis, and recovering pyrolysis oil from oil gas discharged by pyrolysis through condensation, enabling the tail gas to pass through alkali liquor to intercept fluoride in the tail gas, enabling positive active powder of the retired lithium battery to be subjected to sulfuration roasting-water immersion to prepare a cobalt / manganese-based catalyst, and then enabling the tail gas treated by the alkali liquor to enter a fixed bed catalytic oxidation reactor filled with the cobalt / manganese-based catalyst recycled from the retired lithium battery to be subjected to catalytic degradation treatment. The catalyst prepared from the retired lithium battery is used for treating the organic waste gas generated by pyrolysis treatment, and is suitable for treating various retired lithium batteries such as lithium cobalt oxide, lithium manganate and nickel cobalt lithium manganate, and the applicability is extremely high; the harmless treatment process of the organic waste gas has the advantages of low temperature, simple process, good operation environment, easiness in control and amplification and the like.

The invention relates to the technical field of a film coating premix agent of a probiotic preparation, in particular to a film coating premix agent of a probiotic preparation, as well as a preparation method and application of the film coating premix agent. The film coating premix agent of the probiotic preparation comprises the following components in percentage by mass: 50-70% of a methacrylic acid and ethyl acrylate copolymer, 20-30% of talcum powder, 6-8% of a plastifier, 2-12% of an antisticking agent and 0.05-0.1% of simethicone. The film coating premix agent as well as the preparation method and application thereof disclosed by the invention have the beneficial effects that an enteric type film coating technique is introduced into producing and processing of the probiotic preparation, so that probiotics are isolated from external environment, the influence of oxygen, moisture, carbon dioxide, light rays, temperature variation and the like in air is avoided, the stability of the probiotic preparation is guaranteed, and problems existing in the prior art are economically and effectively solved.

The invention relates to the technical field of wallpaper and provides white ink slurry which solves the defects of poor dispersion performance, weak covering capacity and low whiteness of the white ink slurry in the prior art. In addition, the invention also provides an application method of the white ink slurry in wallpaper. The white ink slurry is prepared from the following raw materials in parts by weight: 10-20 parts of styrene-acrylic emulsion, 0-10 parts of VAE emulsion, 20-25 parts of distilled water, 1-5 parts of a thickening agent, 3-8 parts of a dispersing agent, 0-1 part of a wetting agent, 1-3 parts of a defoaming agent, 1-2 parts of a retarder, 5-10 parts of propylene glycol, 30-50 parts of kaolin and 1-10 parts of titanium pigment.

The invention discloses aluminum alloy rotary mixing amplitude adjustable double fire nozzles for a printing-dyeing singeing machine, and relates to the field of a fire port with rotary mixing amplitude adjustable double nozzles on the printing-dyeing singeing machine. A left shaft head (2) and a right shaft head (3) of the aluminum alloy rotary mixing amplitude adjustable double fire nozzles (1) are welded with an air inlet box (4) together; a connecting flange (5) welded with the air inlet box (4) is connected with a fire port body; a left fire port body (6) and a right fire port body (7) are connected through a stud (9); two sides of a middle rail (47) of a fire port rail double-nozzle assembly (10) are provided with a left rail (45) and a right rail (46), and a left nozzle (48) and a right nozzle (49) are formed on the upper part of the middle rail; and a left fire port brick (13) and a right fire port brick (14) are arranged on a left heat insulation plate (15) and a right heat insulation plate (16) at the tops of the left fire port body (6) and the right fire port body (7). The aluminum alloy rotary mixing amplitude adjustable double fire nozzles for the printing-dyeing singeing machine have the advantages of high strength, energy conservation, high flame temperature, no excursion and clean singeing.

The invention discloses a humidity-adjusting dryer for drying layered soft products, which is easy to adjust temperature and humidity. It is used for drying layered soft products. room, transmission room, air inlet duct and air return duct connected with the adjustment room and transmission room, the adjustment room has a heating device and a blower, and the adjustment room is also equipped with a cooling and dehumidification device and a temperature detector that cooperate with each other , a humidity detector, a spray gun for increasing the humidity of the hot air in the conditioning unit, and a computer-controlled real-time controller for controlling the heating device, refrigeration and dehumidification device, temperature detector, humidity detector and spray gun.

The invention relates to a FeMnNi powder accelerant with low cost, wherein the alloy comprises the components in percentage by weight as follows: 30-50% of Mn, 0-10% of Ni, 1-3% of Cr, 0.1-0.8% of C, 0.05-0.2% of Si and the balance of Fe. The oxygen content of a powder accelerant product optimized is less than or equal to 300ppm, and the nitrogen content is less than or equal to 180ppm. The accelerant is prepared by a gas atomization process of inertial gas, so that the accelerant powder is spherical or approximately spherical with uniform alloy composition. Diamond synthesized by the accelerant and graphite in proportion is greyish-green or dark green in color, and the crystal form of the diamond is a polygonal aggregate in a granular structure. The per mixed unit yield reaches over 154 carat / block by cavity with diameter of 40mm, the static pressure strength is average about 20N, and the coarsness proportion of 80 / 100 reaches over 60%, so that the accelerant is an ideal raw material for manufacturing an efficient diamond grinding apparatus for crisp and hard materials.

The invention relates to a filtering element, in particular to a preparation method of a composite filtering element and a composite filtering element. The preparation method comprises the following steps: a, preparing a first filtering element and a second filtering element having a filtering surface and a plane and different in size; b: preparing at least one reinforcing material layer; and c, fixing the reinforcing material layer prepared in step b between the planes of the first filtering element and second filtering element prepared in step a by virtue of plane welding or plane hot melting or plane cold adhesion. By adopting the preparation method of the composite filtering element provided by the invention, the concept of the traditional process is thoroughly changed, and the technical difficulty of the contradiction between the strength and elasticity / toughness of the conventional filtering element which cannot be solved at present can be solved. The composite filtering elementprepared in the preparation method provided by the invention not only can improve the strength of the filtering element in a geometrical progression manner, and can reduce the deformation, but also can ensure the elasticity and toughness of the filtering element, and can thoroughly overcome the problem that the reinforced filtering element is likely to break and crack.

The invention discloses an anti-ultraviolet agent. The anti-ultraviolet agent is prepared by taking a modified nano powder glue, octyl methoxycinnamate and cinnamate as main raw materials and matchingwith activated carbon, cationic polyacrylamide, dipropylene glycol methyl ether, polyvinyl alcohol and other aids. After the anti-ultraviolet agent acts on the textile fabric, the anti-ultraviolet property of the textile fabric can be obviously improved, so that the UVA transmittance and UVB transmittance are lower than 4%, and the UPF (Ultraviolet Protection Factor) is more than 30; the finishedtextile fabric has excellent anti-ultraviolet effect stability and timeliness, and anti-ultraviolet time is longer; moreover, the using safety is high, any adverse effects to the human body are not caused after the agent is used for a long time, and poison problems existing in the conventional chemical ultraviolet light absorbers are solved.

The invention discloses a manufacturing method for promoting edible safety of preserved meat. The method is characterized by comprising the following steps: (1) selecting raw materials: cutting streaky pork into 0.7-1.0kg meat strips in 4-5cm thickness; (2) cleaning: cleaning with sterile water and 0.9-1.2% saline water; (3) preparing yellow rice wine juice: juicing fresh ginger and garlic and preparing into the yellow rice wine juice under water bath temperature of 32-34 DEG C; (4) vibrating an immersion liquid: putting the meat strips into a 50Hz oscillator, adding 6-7cm yellow rice wine juice and vibrating the immersion liquid in two stages; (5) pickling: performing micronization treatment on the raw material, fermenting and cooking and then marinating; and (6) drying and airing: drying and airing the meat strips in a drying machine and an indoor airing room. The preserved meat prepared according to the method disclosed by the invention is low in nitrite content, less in bacteria adhesion volume and higher in edible safety and health.

The invention discloses a natural leather full-automatic processing device used for drying a layered leather product. The natural leather full-automatic processing device comprises at least one adjusting device which comprises an adjustor, a conveying device, an inlet channel and an outlet channel, wherein the inlet channel and the outlet channel communicate with the adjustor and the conveying device. The natural leather full-automatic processing device can increase the drying speed of the leather product and improve the drying efficiency. Meanwhile, the temperature and humidity adjusting capacity of the natural leather full-automatic processing device is high so that the leather product can be uniformly and totally dried in a machine from the interior to the exterior, and fiber of the leather product is free of distorsion, deformation and shrinkage and good in hand feeling.

The invention discloses a high-sodium low-rank coal flotation sodium removal method and system. The method comprises the steps that primary flotation is conducted through a primary flotation machine, a primary flotation foam product is medium-sodium concentrate, primary flotation residual ore pulp is medium-sodium tailings, and medium-sodium clean coal is obtained after the primary flotation foam product is washed and filtered; the medium-sodium clean coal is subjected to secondary flotation through a separation flotation machine, separated foam products are low-sodium vitrinite-rich concentrate, and separated residual ore pulp is low-sodium inertinite-rich tailings. According to the method, the acetic acid solution is added on the basis of the two-stage flotation process, so that the sodium content can be effectively reduced and no harmful waste gas is generated while coal rock macerals of the coal sample are subjected to flotation separation, the corrosion of acetic acid to production equipment is very small, the service cycle of the equipment is basically not influenced, and the method is safe and green. According to the method, the sodium content in the high-sodium coal can be effectively reduced while the good flotation enrichment effect can be guaranteed, the quality of the coal is improved, and considerable economic benefits are achieved.

The invention discloses a humidity adjusting drying machine adjusting temperature and humidity easily. The humidity adjusting drying machine is used for drying lamellar soft products and comprises at least one adjusting unit. Each adjusting unit comprises an adjusting chamber, a transmission chamber, an air inlet channel and an air return channel, wherein the air inlet channel and the air return channel communicate with the adjusting chamber and the transmission chamber, the adjusting chamber is provided with a heating device and an air blower and further provided with a refrigeration dehumidifying device, a hygrosensor, a humidity detector, a spraying gun and a controller, the refrigeration dehumidifying device, the hygrosensor and the humidity detector are matched with one another, the spraying gun is used for increasing the humidity of hot air in the adjusting unit, and the controller is used for controlling the heating device, the refrigeration dehumidifying device, the hygrosensor, the humidity detector and the spraying gun in real time in a full-computer manner.

The invention discloses a free-air defense method for preventing massive morality of Hongkong oysters in winters. The free-air defense method includes a, early-stage forecasting: transmitting early-stage forecasting of massive morality of the Hongkong oysters once continuous heavy fog weather is forecast in weather reports in late winter and early spring seasons and abnormal morality of lower than or equal to 10% of oysters in high-salinity regions is discovered; b, free-air treatment: harvesting Hongkong oysters older than one age after the forecasting is transmitted at the step a, placing the Hongkong oysters on floating mats or bank sides, exposing the Hongkong oysters in the air, covering the Hongkong oysters by breathable woven fabrics, preventing sunlight from directly irradiating on the Hongkong oysters and keeping the temperature constant within a range from 4 DEG C to 8 DEG C; c, free-air management: watering the Hongkong oysters everyday, keeping the body surfaces of oyster groups in moisture states and maintaining the temperature constant within the range from 4 DEG C to 8 DEG C; d, secondary hanging cultivation: opening the breathable woven fabrics after the continuous heavy fog weather, airing the Hongkong oysters for 3-5h, pouring seawater on the Hongkong oysters, hanging the Hongkong oysters on the floating mats or sinking mats again and cultivating the Hongkong oysters.

The invention discloses an energy-efficient dry-wet-process production line for synthetic leather. The energy-efficient dry-wet-process production line is used for drying a layered soft product and comprises at least one adjusting apparatus. The adjusting apparatus comprises an intelligent adjusting device, a displacement device, and an inlet pipe and an outlet pipe communicated with the intelligent adjusting device and the displacement device. The energy-efficient dry-wet-process production line provided by the invention can accelerate the drying speed of flexible substance products and improve drying efficiency; and the production line has good temperature and humidity adjusting capability and enables flexible substances to be uniformly and overally dried from interior to exterior in a machine, and the fibers of the flexible substances have no distortion, deformation and contraction and feels good.

The invention relates to the technical field of range hoods, in particular to an AC motor used in range hoods, comprising a casing, a core is arranged in the casing, a center shaft is arranged in the middle of the core, and the casing comprises The front-end housing and the rear-end housing are inserted and connected, and the side wall of the rear-end housing is bent and folded outward to form a ring-shaped groove, and the inner cavity of the ring-shaped groove forms a return channel through the guide spacer. The two ends of the channel are cyclically connected by the circulating pump and the cooling coil; the rear end of the central shaft is provided with a synchronizing section, and outside the synchronizing section, the cooling fan and the circulating pump are respectively linked with the fan synchronizing ring and the pump body same ring which are slidingly connected. And one side of the fan synchronizing ring and the same ring of the pump body are respectively connected with an air-cooled heat dissipation adjusting mechanism and a liquid-cooled heat dissipation adjusting mechanism. The present invention can achieve accurate and appropriate heat dissipation effect according to the temperature change of the AC motor of the range hood, and keep the inner cavity of the housing in a more tightly sealed state, thereby preventing the intrusion of oil fume into the housing.

The invention provides a functionalized polyester, which is prepared by polymerizing functionalized epoxy compound and functionalized anhydride. Because the functional groups on the functionalized epoxy compound and the functionalized anhydride have sensitivity on changes of pH value, temperature and ionic strength, so the polyester prepared from the epoxy compound and the anhydride with the functional groups has multi-responsiveness, a structural unit contained in the polyester has good biocompatibility, and the polyester is biodegradable due to the existence of ester bonds. The functionalized polyester not only has multi-responsiveness, but also has biocompatibility and biodegradability. The invention also provides a preparation method of the functionalized polyester, the method is operated simply, and the reaction is rapid so as to control preparation process of the polyester well.

The invention discloses a high-density snake raising house construction and use method which includes the steps: 1) site selection and technical requirements of snake house construction; 2) snake shedconstruction; 3) snake house construction; 4) snake house internal construction; 5) snake house use; 6) snake house feeding management.

The invention provides a method for obtaining immobilized tyrosinase by using polyacrylonitrile microspheres as carriers, and an application. According to the method, the modified polyacrylonitrile microspheres are used as the carriers, tyrosinase is used as an immobilized enzyme, through glutaraldehyde covalent cross-linking combination, the tyrosinase is immobilized on the polyacrylonitrile microspheres, and the purpose of degrading phenolic compounds can be achieved. The method disclosed by the invention is simple, the cost of raw materials is low, the reaction condition is easy to realize, the cyclic utilization effect of the synthetized immobilized tyrosinase is good, the pH tolerance is high, the temperature tolerance is high, the immobilized tyrosinase is heated stably, and the tyrosinase combined to the polyacrylonitrile microspheres can effectively remove phenolic substances in waste water under the effect of oxygen. According to the method disclosed by the invention, the phenolic compounds are degraded by a biological method, and the method conforms to the current international development trend of green decontamination and environmental-friendly decontamination.

The embodiment of the invention discloses an electric servo control method for a firebrick pressing skip car, and the method comprises the steps that man-machine interaction equipment obtains a target set value of the skip car, and transmitting the target set value to a controller; the controller generates an initial instruction according to the target set value, and outputting the initial instruction to a servo controller; the servo controller generates a control instruction according to the initial instruction, and outputs the control instruction to a servo motor so as to control the rotating speed of the servo motor; the servo motor rotates according to the control instruction; a coder detects a feedback signal in real time and enables the feedback signal to be fed back to the servo controller; and the servo controller enables the feedback signal to be compared with the initial instruction, and adjusts the outputted control instruction. The embodiment of the invention also discloses an electric servo control system for the firebrick pressing skip car. The system provided by the invention replaces a conventional hydraulic control system, effectively simplifies a hydraulic oil path, employs a closed loop mode, improves the control precision, and improves the system response speed and stability.

The invention discloses a fur product production device for a full-digitalization monitoring industry. The fur product production device is used for drying lamellar leather products and comprises at least one adjusting device. Each adjusting device comprises an adjuster, a conveying device, an inlet channel and an outlet channel, wherein the inlet channel and the outlet channel communicate with the adjuster and the conveying device. According to the fur product production device, the drying speed of the leather products can be increased, and the drying efficiency is improved. Meanwhile, the temperature and humidity adjusting capability of the fur product production device is high, the leather products are evenly and comprehensively dried from interior to exterior in a machine, fiber of the leather products is free of distortion, deformation and shrinkage, and the hand feeling is good.

The invention discloses an optical fiber spectrometer which comprises a grating base and a detector base, a grating is arranged at one side of the grating base, six adjusting holes are symmetrically formed in the grating base, six screw grooves corresponding to the adjusting holes are formed in the surface of the grating, and adjusting fixing screws penetrate through the adjusting holes to extendinto the screw grooves to fix the grating base and the grating. A rotating shaft is arranged in the upper portion of the middle position of the grating base and the grating, a square groove is formedin the detector base, a detector is installed in the square groove, a PCB is installed on the surface of the detector, threaded holes are formed in the four corners of the PCB, threaded grooves used in cooperation with the threaded holes are formed in the surface of the detector base, and a mounting seat is arranged at one end part of the detector seat. The side wall of the grating is designed tobe installed, and the adjusting screw and the fixing screw are both perpendicular to the rotating shaft on the side face, so that the grating cannot deviate from the shaft during fixing or rotating debugging, the wall thickness of the side wall is uniform, and reliable thickness strength can be guaranteed.