45results about How to "The test value is accurate" patented technology

The invention discloses a method for manufacturing an architectural acoustics 1: 10 reduced ruler head and torso simulator. The method comprises the first step of scanning a full-size standard head and torso simulator prototype through a three-dimensional laser scanner and storing the scanned data file as a DXF; the second step of guiding the DXF into a 3DMAX so that three-dimensional patch editing can be carried out on the DXF and an accurate three-dimensional curved surface digital model of the head and torso simulator can be obtained, wherein an auditory meatus is reserved in the head and torso simulator in the process of modeling; the third step of manufacturing the 1: 10 reduced ruler head and torso simulator through a 3D printing machine according to the designed three-dimensional digital model in a proportional zooming mode; the fourth step of vertically placing two microphones connected with rotary unions into the auditory meatus pre-reserved in the 1: 10 reduced ruler head and torso simulator to serve as a binaural signal receiver simulating the full-size head and torso simulator; the fifth step of plugging filler into a chest of the 1: 10 reduced ruler head and torso simulator. The 1: 10 reduced ruler head and torso simulator can be used for measuring hall space sense parameters in an acoustics reduced ruler model experiment and will be applied to the auralization technology.

The invention relates to a method for testing the original viscosity of an adhesive by adopting a vertical tension method, belonging to the field of viscosity tests of adhesives and comprising a tension tester. The method is technically characterized by comprising the following steps: firstly, a clean steel ball is vertically hung on the tension tester through a stayguy; secondly, an adhesive tape is flatly adhered to a carrying platform arranged below the clean steel ball; and thirdly, the tension tester is started to enable the clean steel ball to descend with uniform speed of 250 to 350 mm / min until the clean steel ball is in a stationary state on the surface of the adhesive tape, and then the clean steel ball is fast lifted upwards with speed of 250 to 350 mm / min through the tension tester until the clean steel ball leaves the adhesive tape, and the tension tested by the tension tester is the original viscosity of the adhesive. After improving the prior art, the invention has the advantages that the method can test the adhering performance of a single mark, and has accurate test value and little error.

The present invention belongs to bearing detection and test in mechanical engineering and is the load uniforming detection device and method for serial combined thrust bearing. There are vertical frame, oil cylinder in the lowr part, driving box in the upper part with thrust bearing on its output shaft, bearing fixing seat screwed to the output end of oil cylinder piston rod; serial combined cylindrical roller thrust bearing to be set in the bearing fixing seat and with spindle connected to the output shaft; speed varying gear mechanism inside the driving box; and electrical resistance strain gages to be adhered to the outer surface of the bearing to be measured. The present invention has the features of reasonable structure and reliable measured data and is suitable for dynamic detection of uniform load performance and fatigue life of various serial combined cylindrical roller thrust bearings.

A detection device for air intake resistance of a general-purpose small-flow air filter, which is characterized in that it includes a sealing inspection tool, and a fixing device for positioning the air filter to be tested is arranged in the sealing inspection tool, and the entire air filter to be tested can be The inner cavity of the sealed inspection tool is divided into an air intake chamber and an exhaust chamber, wherein the upper sides of the air intake chamber are respectively provided with an air inlet and a side outlet, and the bottom of the exhaust chamber is provided with an exhaust port, and the exhaust port The negative pressure air source is connected through the pipeline, and the side air outlet is connected with the pipeline of the exhaust port after being connected with the differential pressure gauge through the pipeline. The detection device for the air intake resistance of the small-flow air filter of the general machine designed by the invention can accurately measure the air intake resistance of the small air filter, and has the characteristics of simple operation and high data consistency.

The invention relates to a wood drying method, which is a method for controlling a wood drying process by wood stress. In a drying process, the bending degree of a stress test piece represents a stress value to control the temperature and the moisture of a drying kiln so as to control a wood drying process. Wood of a certain length is sawn on dried material; the sawn wood is equally divided into two parts on the half of the thickness direction along the fiber direction, i.e. a first stress test piece and a second stress test piece; except the wood surface, the two stress test pieces seal rest five surfaces to isolate the five surfaces from air; then, the five sealing surfaces of the second stress test piece are fastened by a fixing sleeve; the two stress test pieces are put on the position with the highest drying speed in the drying kiln along with the dried material; the stress of the dried material is judged according to the bending degree of the two stress test piece; and the bending degrees of the stress test piece is observed to control the temperature and the moisture of a drying medium and the drying kiln so as to guarantee the drying quality of the wood and prolong the service life of the dried material. The method is especially suitable for drying tree types which are difficult to dry.

The invention relates to the technical field of mechanical property tests, and discloses a horizontal push-pull force tester. The horizontal push-pull force tester comprises a fine tuning module, a tensiometer, a coarse tuning module, a base, precise guide rails and a transitional plate, wherein the fine tuning module comprises a tension fine tuning handle wheel, a lead screw and a lead screw seat; the forwarding or retracting of the lead screw is controlled by the forward and reverse rotation of the tension fine tuning handle wheel; the other end of the lead screw is contacted with the precise guide rails fixedly provided with the tensiometer and the transitional plate; and the accurate position of the transitional plate on the precise guide rails can be controlled. The coarse tuning module comprises a winding wheel, a winding handle, a ratchet wheel and a bearing seat; and the winding handle controls the ratchet wheel to rotate only toward one direction by the bearing seat and generate stepping. The horizontal push-pull force tester can carry out detection of mechanical tension or thrust on a single product, and has the advantages that the testing value is accurate, the error isless and the occupied space is less. In addition, by applying the fine tuning function of the horizontal push-pull force tester, the tension can be increased at constant speed, and the product is prevented from being damaged after being impacted by sudden force in the testing process.

The invention relates to a colloidal gold reading instrument, in particular to a colloidal gold portable CCD reading instrument. The reading instrument includes an upper cover, a lower cover, a front upper cover, an image acquisition device, a display unit, a processing system and a power supply module; The image acquisition device is set, the front upper cover is arranged above the notch to close, and an insertion port for the sample to enter the image acquisition device is arranged on the upper cover; The button module is provided with a transparent window, the display unit is arranged below the transparent window, and a processing system is fixedly arranged on the lower cover below the installation port, and the processing system is respectively connected to the image acquisition device, the button module, the display unit and the power supply module. The reading instrument of the invention has the characteristics of small volume, light weight and portability, can independently process data, and achieve the function of quantitative detection.