1057results about How to "Avoid compromising accuracy" patented technology

The invention discloses a thermal gravimetrical reactor applied to bulk specimen testing, belonging to testing equipment for performing thermo gravimetric analysis on specimens and aiming to solve the problems that small-mass and small-sized specimens are required and a sample vessel is unbeneficial to gas-solid reactions in the conventional thermo gravimetric analyzer. Through a high-temperature reactor, reaction gas is preheated fully, so that mass measuring errors caused by temperature change of the reaction atmosphere are avoided; two types of hanging baskets are specific to different specimens respectively, so that the diffusion resistance during the reactions of bulk specimens is reduced effectively, and complete reactions and measuring accuracy are ensured; the height of an electric heating furnace is adjusted through a hydraulic lifting platform, so that samples can be heated at constant temperature under a high-accuracy condition. The thermal gravimetrical reactor can be used for dynamically measuring the mass changes of bulk specimens at various heating rates or under a constant-temperature condition, and is more consistent with the requirements of scientific research production than the conventional thermal gravimetrical analyzer.

The invention relates to the field of analytical chemistry and discloses a method for rapidly detecting a main component in active lime and passivated lime. The method comprises the following steps: 1, weighing a proper amount of active lime and passivated lime samples and carrying out a blank test along with the samples; placing the samples into a heating container; adding a proper amount of hydrochloric acid solution; heating till the samples are completely decomposed; cooling a few undissolved substances of the passivated lime sample to the room temperature; after the solution is filled into a volumetric flask to fix volume, respectively extracting two parts of proper amount of test solution; and 2, respectively titrating calcium oxide and magnesium oxide or calcium and magnesium. Theinvention has the characteristics that the sample decomposition is simplified, and a measurement error is reduced and the analysis time is shortened by controlling the titer of EDTA and EGTA titrand within the burette volume range; two separately added indicating agents are prepared into a mixed indicating agent to be added once when the calcium and magnesium or magnesium oxide is directly titrated so as to reduce the operation time; and the final result is obtained by adding the experience correction coefficient in the passivated lime sample.

The invention discloses a turbidity sensor and a water body turbidity on-line detection method. The turbidity sensor is of a special structure; the phenomena that the turbidity detection accuracy is influenced by attaching pollutants in a water body on a transmitting lens is possibly avoided; the condensation water mist on the transmitting lens is prevented by virtue of heating so as to eliminate the influence of the mist of the transmitting lens on detection; scattered light of the water body is acquired by an annular photovoltaic conversion device in 360 degrees, so that the effective received quantity of the scattered light is increased to the maximum extent; and the signal of an operation amplifying device is not needed to be amplified to guarantee the stability and reliability of the turbidity sensor. By utilizing the water body turbidity on-line detection method of the turbidity sensor, output voltage values, acquired for many times of a photovoltaic conversion device, are used and a processing mode that the average value is taken is adopted; modes of heating and light control are combined during the detection process every time, so that the detection error caused by the mist of the transmitting lens and the unstable light sources is eliminated, and the turbidity detection accuracy is further guaranteed.

The invention relates to an end shaft drilling device. The end shaft drilling device comprises a machine frame and a supporting table, wherein a triangular plate is connected to the machine frame, a cam is arranged below one end of the triangular plate, a rotating shaft is arranged below the cam, a rotating shaft is coaxially connected with a rotating disc, the rotating disc can be meshed with thecam, the rotating shaft is connected with a transverse shaft and a supporting shaft through a bevel gear, a supporting disc is fixedly connected to the top end of the supporting shaft, and a collecting box is rotationally connected to the bottom end of the supporting shaft, the other end of the triangular plate is connected with a first fixing block, and the bottom end of the first fixing block is connected with a first supporting plate, the first supporting plate is connected with a sliding rod, the other end of the sliding rod is connected with a drill bit, a supporting spring sleeves the sliding rod, the first fixing block is fixedly connected with a transverse plate, the other end of the transverse plate is connected with a second fixing block, the bottom end of the second fixing block is connected with a push rod, a water bag is fixedly connected to the supporting table, the water bag is connected with a water spraying pipe, and the water spraying pipe is connected with a spray head. According to the device, the problems that the drill bit needs to be moved in a drilling process and iron scraps are not easy to remove due to excessively high temperature are solved.

The invention belongs to the technical field of label or nameplate processing and discloses a cutting method of an adhesive label. The cutting method comprises the steps of winding, fixing, transversecutting and longitudinal cutting. A printed adhesive sticker is wound on a mounting roller, and then, the mounting roller is fixed to a transmission device. The adhesive sticker is pulled until the adhesive sticker clings to the upper surface of a conveyor belt, and the end part of the adhesive sticker is fixed to a winding roller. Then, a cutting knife is driven through a rotating motor to rotate, and transverse rip lines are cut on the adhesive sticker. Then, the cutting knife is driven by a cam to move downwards, longitudinal rip lines are cut on the adhesive sticker, and the cutting of the adhesive label is realized. The cutting method solves the problem that the use of manual cutting in the prior art causes a high defective rate during the production of the adhesive label.

The invention discloses a shell assembling equipment capable of achieving accurate dispensing for LED lamp production. The shell assembling equipment particularly comprises a workbench, an operation table, a glue storage pipe and a grabbing mechanism, supporting columns are installed at the four corners of the top end of the workbench correspondingly, a top plate is fixed to the top ends of the supporting columns, and a silica gel storage tank is installed at one side of the top end of the top plate; and a vacuum pump is fixed to the other side of the top end of the top plate, an electromagnetic sliding rail is arranged at the side, close to the vacuum pump, of the interior of the top plate, a sliding block is installed in the electromagnetic sliding rail, a hydraulic lifting rod is fixedto the bottom end of the sliding block, and a vacuum suction cup is installed at the bottom end of the hydraulic lifting rod. According to the shell assembling equipment capable of achieving accuratedispensing for LED lamp production, through the arrangement of the electromagnetic valve, a hydraulic rod and a piston, after one-time dispensing is finished, the hydraulic rod can drive the piston tomove upwards, silica gel in a glue injection head is sucked back into the glue storage pipe, and the situation that the residual silica gel in the glue dispensing head drips and pollutes a shell of alamp body is avoided.

The invention discloses multi-point and multi-depth water body sampling equipment and a sampling method thereof. The equipment comprises a mounting plate, first group of water sample collecting devices are arranged on the mounting block and a sliding block; a handle is fixedly arranged on a cord-winding column, one end, far away from the cord-winding column, of an extension cord is fixed on the water sample collection box; a cylinder two switch is arranged at the top of an upper convex part, a floating ball is fixedly arranged on a push rod, a filter screen is fixedly arranged in a water inlettank formed at the side convex part, a baffle plate is fixedly arranged at a top surface of an output end of the cylinder two, and a hairbrush is fixedly arranged at one side, far away from the fixedplate, of a recess plate. The invention provides the multi-point and multi-depth water body sampling equipment, and has the function of automatically opening when reaching a specified depth, automatically closing after sampling, automatically coiling the cord after closing, and automatically cleaning the attached aquatic plant and moss in the upward movement of the cord coiling. The invention further discloses a sampling method of the multi-point and multi-depth water body sampling equipment, the operation is simple, and the equipment is worthy of popularizing.

The invention discloses an infrared heating testing device and testing method for bituminous pavement, and aims to enable the measured test data conclusion to play a theoretical guiding function on practice, and further enable the accuracy to be high, the simulation performance to be high and operation to be simple; the infrared heating testing device comprises a test bed framework, wherein an infrared ray generation device is arranged on the test bed framework; the infrared ray generation device is connected with an infrared ray generation controller, a liquefied petroleum gas inlet control valve and a variable-frequency air blower; the liquefied petroleum gas inlet control valve is connected to a liquefied petroleum gas source; the variable-frequency air blower is connected with an air source; a test block tray used for placement of a pitch test block is arranged at the lower end of the infrared ray generation device; an infrared radiation flow sensor capable of collecting the infrared ray radiation quantity of the infrared ray generation device is arranged on the test block tray; a plurality of temperature sensors are arranged in the pitch test block during testing; the infrared radiation flow sensor and the temperature sensors are all connected to a data acquisition instrument; the data acquisition instrument is connected to a computer capable of displaying test data.

The invention relates to a personalized lumber internal fixation auxiliary device and a manufacturing method thereof. The personalized lumber internal fixation auxiliary device comprises two guide holes, two sleeve pipes and a connector, wherein the sleeve pipes are positioned in the guide holes, and the connector is connected with the guide holes on two sides. The manufacturing method comprises the following steps of: firstly, acquiring lumbar three-dimensional parameters through CT (computed tomography) scanning; secondly, designing a guide plate containing positioning guide holes for vertebral pedicles on two sides of a single vertebral body on a three-dimensionally reconstructed lumbar digital anatomical model; and finally, producing a template through a laser radiation layer-by-layer solidification forming technology. The personalized lumber internal fixation auxiliary device is used for accurate implantation of pedicle screws.

The invention relates to a mechanical characteristic researching method of an asphalt mixture based on an atomic force microscopic technology. The method comprises the following steps that (1) a freezing low-temperature cutting method is used to prepare an asphalt mixture sample; (2) an AFM-QNM nano-scale mechanical property quantification module of an atomic force microscope is used to observe the asphalt mixture sample, mechanical characteristic images, including a modulus characteristic image, an anchoring strength characteristic image, a dissipation energy characteristic image and a deflection characteristic image, of the asphalt mixture sample are obtained; and (3) Nanoscope Analysis software is used analyze the mechanical characteristic images quantitatively, and the modulus value, anchoring strength value, dissipation energy value and deflection value of a component to be researched are obtained. The method provided by the invention is simple and easy to operate, and on the premise that different components of the mixture are not separated, the mechanical characteristic of the micro nano-scale of certain component can be measured directly, and basis is provided for in-situ discrimination of asphalt performance.

The invention discloses a sample processing device for soil heavy metal detection and a processing method thereof. The processing device comprises a hopper, a screen-out device, a preprocessing device, an allocation device, a sample rack and a digestion device. The screen-out device comprises a separating base, a positive electrode suction device, a screen-out fan and a collecting groove. The preprocessing device comprises a drying chamber, an electric heating wire, a lifting crushing screen and a sample suction port. The suction pump of the allocation device is connected with the sample suction port through a pipeline. The allocation device is connected with a metering valve. The sample rack comprises a rotating base used for rotating the sample rack at a fixed angle. A plurality of sample tubes are circumferentially arranged on the rotating base. An ultrasonic generator is arranged at the connection between the sample tubes and the rotating base. The digestion device comprises a storage tank and a digestion liquid peristaltic pump. In a word, the sample processing device has the advantage of novel structure, perfect method, good processing effect, small detection error and the like.

The invention discloses an ultrathin adhesive tape preparation method and a thickness adjusting device thereof, and relates to the technical field of ultrathin adhesive tape preparation. The spraying thickness of an adhesive is convenient to control. The ultrathin adhesive tape thickness adjusting device comprises a glue scraping mechanism and two first supporting frames, the glue scraping mechanism and the two first supporting frames are installed in a dust-free chamber, an adjusting stud is rotatably installed on the outer wall of the top of one first supporting frame, an adjusting guide rod is fixed to the outer wall of the top of the other first supporting frame through a screw, and a servo adjusting motor is fixed to one outer wall of the first supporting frame through a screw. The ultrathin adhesive tape preparation method comprises the following steps that one end of an adhesive tape base film is pulled to a winding roller to be fixed; and parameters are adjusted through a control screen, so that the servo adjusting motor controls the adjusting stud to rotate. By arranging a glue scraping roller, an adjusting frame and other structures, the servo adjusting motor can be controlled to work to drive the adjusting stud to rotate, and then the adjusting frame is made to ascend and descend, so that the distance between the glue scraping roller and the adhesive tape base film is changed, and the purpose of adjusting the thickness is achieved.

The invention discloses a method and device for detecting a direct current power transmission line fault. The method comprises: obtaining an input current and an output current of a to-be-detected segment of a direct current power transmission line; judging whether the relation between the input current and the output current satisfies a preset condition; and if the preset condition is satisfied, determining that the to-be-detected segment breaks down. According to the invention, the technical problem that in the prior art, the accuracy of a detection scheme of a direct current feeder line fault in a subway traction power supply system is easily affected by subway power consumption, so that the accuracy of fault detection is insufficient is overcome. The accuracy of direct current power transmission line fault detection is increased.

The invention relates to a single-side pedicle screw-driving auxiliary device and a manufacturing method thereof. The device comprises a guide hole, a sleeve, a first clamping piece, a second clamping piece, a cross shaft and a torsion spring. The invention also discloses the manufacturing method of the device. The manufacturing method comprises the following steps of: firstly, acquiring three-dimensional data of a vertebral body through CT (computed tomography) scanning, and three-dimensionally constructing a three-dimensional model of the vertebral body; secondly, fitting the clamping pieces which are complementary with anatomic form curved surfaces of a cone plate and an acantha by using engineering software; and finally, producing the device by using a rapid forming technology. The single-side pedicle screw-driving auxiliary device has the beneficial effects of being convenient and simple to use, shortening the average operation time, improving the efficiency, reducing the risk of exposure infection, avoiding traction injuries to surrounding tissues, and the like.

The invention discloses a test simulation device for a confined aquifer. The test simulation device comprises a sandy soil container, a feed water height control device, a water supply device and a pressure measuring and observing device, wherein the sandy soil container is arranged obliquely, one end of the sandy soil container is provided with a first water inlet pipe, a plurality of pressure measuring nozzles are uniformly distributed on the front side wall, the rear side wall and the bottom face of the sandy soil container and are connected with one pressure measuring pipe of the pressure measuring and observing device through a connecting pipe, a water pumping pipe is arranged at the bottom of the sandy soil container, a discharge casing is fixed outside a side wall at the lower end of the sandy soil container, the top of the sandy soil container is connected with a pressure-bearing top cover which is provided with at least one overflow pipe; the feed water height control device comprises a water tank, which is connected with a lift device; and the pressure measuring and observing device comprises a pressure measuring plate and a plurality of pressure measuring pipes which are arranged on the pressure measuring plate side by side. By means of the scheme, the test simulation device disclosed by the invention can simulate the change characteristics of a three-dimensional flow field of the confined aquifer under a natural condition and a mining condition, and test simulation device is simple in structure and low in price.

The invention relates to a method for measuring the platelet aggregation and a blood coagulation factor. In the method, a full-automatic coagulate blood analytical instrument is used, the platelet aggregation is measured by using photoelectric turbidimetry and the blood coagulation factor is measured by using a double magnetic circuit and bead method. The method comprises the following measuring steps of: preparing a platelet aggregation inductive agent, platelet rich plasma and platelet poor plasma; respectively reading light transmittance data of a platelet poor plasma sample and light transmittance data of a platelet rich plasma sample as well as light transmittance data of the platelet rich plasma during the forming process of the platelet aggregation within the specified time; calculating the platelet aggregation rate of the measured blood sample; absorbing the platelet poor plasma and injecting the platelet poor plasma in a hemagglutination cup; absorbing the selected reagent according to a test program and injecting the selected reagent into the hemagglutination cup; automatically monitoring the amplitude of a steel bead; and generating a test report by using measuring results of the platelet aggregation and the blood coagulation factor according to input information of patients.

The invention provides an automobile automatic oiling device and system. By arranging an oil cap opening mechanism and an oiling mechanism which work cooperatively, the oil cap opening mechanism can automatically open an oil cap of an automobile, the oiling mechanism can automatic inject gasoline into an oil tank with the oil cap being opened, the whole oiling process is automatic, the tedious process of labor manual oiling is omitted, and the labor intensity of workers is relieved; the oil tank is uncapped through a six-axis robot, and the six-axis robot is high in flexibility, can uncap oiltanks of vehicles of different brands and different models and thus is high in universality; by arranging an X-axis sliding module, a Z-axis sliding module, a first rotating support and a Y-axis sliding module, an oil gun can be accurately driven to move multi-directionally, damage caused by inaccuracy of the action of inserting the oil gun into the oil tanks to a gun head is avoided, and the automobile automatic oiling device and system can adapt to the vehicles of different brands and different models; and an inner cap clamping assembly is further arranged in the oiling mechanism, and the inner cap clamping assembly is in butt joint with a second uncapping assembly to clamp inner caps of the oil tanks to prevent the inner caps from hindering oiling.

The invention discloses a capillary rheometer and a method for measuring rheological properties of polymer materials. The capillary rheometer comprises a charging barrel, wherein the front end of the charging barrel is provided with a feed port, and the rear end of the charging barrel is provided with a discharging port. A first capillary channel, a material flowing pipeline and a second capillary channel are arranged in the charging barrel, and the feed port is communicated with the discharging port sequentially through the first capillary channel, the material flowing pipeline and the second capillary channel. The cross-sectional area of the material flowing pipeline is larger than that of the first capillary channel and the second capillary channel. The method can simultaneously measure shearing rheological parameters and extensional rheological parameters of the polymer materials. During measuring polymer composite materials, the method can avoid the influence of artificial factors, reduce the errors in measurement for several times, and increase the accuracy of measurement.