39results about How to "Help improve" patented technology

The invention discloses intelligent teaching demonstration equipment for art teaching. The intelligent teaching demonstration equipment comprises four supporting legs and a circular plate, wherein the tops of the four supporting legs are fixedly connected with a mounting cylinder; the mounting cylinder is internally provided with an adjusting mechanism enabling the circular plate to ascend or descend; the adjusting mechanism comprises a screw rod, and the screw rod is rotatably connected to the inner bottom of the mounting cylinder; the outer wall of the screw rod is in threaded connection with a screw rod sleeve; the outer wall of the screw rod sleeve is fixedly connected with two mounting frames; the tops of the two mounting frames are fixedly connected with the bottom of the circular plate; the outer wall, located below the two mounting frames, of the screw rod sleeve is fixedly connected with a limiting block; a plurality of limiting grooves are formed in the inner wall of the mounting cylinder in a circumferential array mode; and the limiting block is connected with the inner walls of the limiting grooves in an up-down sliding mode. Through the cooperation of the above structures, a diversified and rich light environment can be constructed for teachers and students, demonstration and explanation of the teachers and observation of the students are facilitated, and the students can conveniently cultivate the sense of space and the sense of light.

The invention relates to the technical field of air bearings, and discloses an ultrasonic-based air foil bearing air film thickness measurement system and method, including an eddy current displacement sensor, an ultrasonic transmitting and receiving device, a hydrogel layer and signal processing equipment, and the air foil Real-time non-destructive monitoring of the air film thickness of the disc bearing. The eddy current displacement sensor measures the displacement of the rotor in two vertical directions, and calculates the axis trajectory of the rotor; the ultrasonic transmitting and receiving device transmits and receives the ultrasonic signal reflected by the hydrogel layer, and transmits to the The signal processing equipment transmits data; the signal processing equipment analyzes and stores the signal data to obtain the elastic deformation of the air foil bearing support layer measurement point; according to the rotor axis track and the elastic deformation of the support layer measurement point, the measurement point is obtained. Air film thickness. The invention realizes the non-intervention measurement of the air film thickness of the air foil bearing by introducing ultrasonic measurement and combining the hydrogel and the air foil bearing.

The present invention relates to the field of soil improvement, in particular to a soil improvement method for garden planting, which includes step 01), inserting several seepage irrigation pipes into the compacted soil, the insertion ends of the seepage irrigation pipes are closed, and the seepage irrigation pipes There are several seepage irrigation holes through the pipe wall; step 02), inject the premix containing iron powder and water into the compacted soil through the seepage irrigation pipe; step 03), dry naturally for 24 hours or more, and then Inject hydrochloric acid solution through the irrigation pipe; step 04), inject liquid organic fertilizer through the irrigation pipe; step 05), inject weak alkaline solution through the irrigation pipe. The invention has the effects of saving a lot of physical strength and greatly reducing labor intensity without manually raking or plowing up compacted soil.

The invention discloses a full-size helicopter rotor test tower, and belongs to the technical field of helicopter rotor test. The test tower comprises a tower, a transmission device, a force measuring device, a rainproof awning, an elevating device, a control platform and a lightning protection device; the tower comprises a tower body and a tower top platform; the transmission device comprises a motor and a transmission shaft; the force measuring device comprises a rotor balance, a rotor shaft and a rotor; the rainproof awning comprises a skeleton, a rainproof tarpaulin, a rotating shaft and a buckle; the elevating device comprises a guide rail rack, a driving motor and a driving rack; the transmission device is connected with the force measuring device via the transmission shaft and the rotor balance; the tower top platform is provided with a guardrail; the rainproof awning is fixed on the guardrail via the buckle; the guide rail rack is fixed on the tower body; the driving motor is mounted on the driving rack; and the elevating device is connected with the control platform via the driving rack. The test tower can shorten a development period, reduce risk and cost of flight test, and satisfy requirements for improvement of the rotor system and development of a novel rotor system.

The invention discloses a mixed slow-release snow-melting and de-icing material and its preparation method and application method. Every 100 parts by weight of the slow-release snow-melting and de-icing material includes: 30-65 parts of ionic snow-melting active materials, 25 parts of inorganic gelling materials ‑60 parts, gel stability enhancer 2‑8 parts, ion buffer stabilizer 0.3‑5 parts. Compared with the traditional ionic deicing agent, the snowmelting and deicing material of the present application reduces the amount of snowmelting and deicing electrolyte (i.e. ionic snowmelting active material) by forming a stable sol system with high ionic strength on the road surface , not only improves the efficiency of snow melting and deicing, but also enhances the skid resistance of the road surface.

The invention discloses an establishment method and a solving method of an optimization design model on the basis of a principle of uniform accuracy life. The establishment method is carried out according to the following steps: 1. adopting a dynamic error decomposition and traceability method to obtain a dynamic measurement system and a respective accuracy loss function of n error units; 2. according to n+1 accuracy loss extremities and n+1 accuracy loss functions set for the dynamic measurement system and the n error units of the dynamic measurement system, obtaining the respective accuracy life of the dynamic measurement system and the error units of the dynamic measurement system; 3. utilizing an unhomogeneity definition in the establishment method to obtain the unhomogeneity of the dynamic measurement system; 4. utilizing a total-system dynamic error model to obtain the average accuracy loss speed weight of the n error units; and 5. establishing a life uniform optimization design model of the dynamic measurement system. The optimization design of the uniform accuracy life of the measurement system can be realized, so that each unit in the system can be subjected to accuracy failure in the roughly same time so as to perform the maximum efficiency of resources.