 Posted: Thu 11:30, 06 Jan 2011 Post subject: A new magnetic compass _74 |
|
| A new type of magnetic compass
Still intact after the vibration test. This structure no less severe than the mechanical strength of the magnet that the United States and the Soviet Union in a metal frame welded parts, the bracket and then dial Liu and tight structure. Obviously this structure is relatively simple manufacturing process. Just press a high precision plastic molds can be completed, this would greatly improve production efficiency. 3, the lighting sector organizations to adopt new magnetic compass, dual power system of lighting. This improves the reliability of aircraft lighting during night. Lighting products on the part of the Soviet Union only requires a dark room at the distance of 0.6 m, clear the indicator dial can be seen to listen, and now the U.S. military standard requirements of lighting indicators include light color, brightness,timberland sale, contrast, uniformity, and other items scattered light . And each inspection methods and testing instruments have more stringent requirements. Lighting requirements of the new magnetic compass standard set by the U.S. military after the reform of the implementation of the new beacon. In order to reach a new beacon lighting requirements. Try l3 rhyme with lighting principles shown in Figure 3. This principle is the rejection of lighting structures are taken to change the light bulbs dial direct exposure to Huo Yan's brightness, uniformity and scattered light were measured. , Two key materials and technology field 2 when in the selection of new magnetic compass the main starting point is: ① the materials used to ensure product performance ② can reduce the weight of the product should be better I @: b ~ 7 - and the assembly process of { ④ high production efficiency. Based on the above principle, the magnetic compass of our connections with the selection of high quality aircraft aluminum Taijin materials. Compass base corrector and lighting such as selection of the base strength and dimensional stability l4 Figure 3 of the better non-metallic materials - Cai carbonated alcohol. Part of the magnetic compass direction of high-quality selection of organic glass. For this part of the Soviet Union is hard plastic. Silicon-glass observation window is dumped. This rejection between the glass and hard plastic rubber seal. With the seal, asked the slow growth of oil leakage and pollution of the compass is easy oil. This part of the United States with a bronze compass Qi, also the silica glass observation window,oakley sunglasses, one is the high cost of steel material; second is to increase the weight of the magnetic compass. Rubber seal in order to avoid the compass brought the issue of oil color, the silicon between the glass and the shell sealed with lead welding, this method is more complicated process. Use the benefits of plexiglass; first shell and the observation window 13, as one solution, without a layer of sealing part, technology is better; second, sealing the entrance to the dial can be easily connected with the adhesive. Magnetic compass dial is the most demanding in the machining and assembly parts. This is partly made of POM plastic pressure. This structure is better technology. Furthermore, this material is light,moncler sito ufficiale, dimensional stability and resistance to oil, variety of performance with a good compass. Most prominent feature is not easily deformed. Dial the old product is made of aluminum i in pressure. Parts made of this material in the processing, inspection and assembly process to vote deformation, thus affecting the product performance and foreign magnetic compass three main properties and environmental conditions compared to the magnetic compass key performance indicators have reached the United States and France, the current level of the magnetic compass. The following table shows the old and new models of magnetic compass and the United States,uggs sale, France and the main properties of the magnetic compass control. Several tables were an old magnetic compass performance of new models of American and French models of the basic error of ≤ 1 ≤ 1. ≤ 1. ≤ l. Compass Error ≤ 2.5. ≤ 2. ≤ 2. ≤ 2 'maximum magnetic effect of 20 \Debate the biggest anger point l7. 20. 2,0. 20 angry debate tilt error of 17 '≤ 5. Tilt l {≤ tilt l {≤ 4. Anger inclined l4. ≤ ambient temperature - 55 ℃ ~ +55 ℃ 55 ℃ ~ +70 ℃ a one of a 55 ℃ ~ +70 ℃ 45 ℃ ~ +70 ℃ Here again we compare the old and new models some of the environmental conditions of the magnetic compass. Old models of magnetic compasses in the range 20 ~ 80Hz, 1.58 vibration of the vibration over 250 hours under load, this is only the vibration in the vertical direction. New models of the magnetic compass is in the range 5 ~ 500H =, 2 ~ 5g Vibration of the three coordinates of axial vibration load, each of axial vibration less than 2.5 hours, and in less than four resonant frequency equal to , each resonant frequency vibration for 20 minutes, three axial vibration total time of 7.5 hours. Two vibration test according to our point of view, although the new standards significantly reduce the vibration time, but excessive vibration load, frequency range, but also in the three axial vibration. There are options for each axial point of the resonant frequency of vibration. Therefore, the new standard of vibration on dynamic performance test of magnetic Luo Panzhen older than the requirements of the standard magnetic compass on a more comprehensive and more stringent. The impact of the old models had load of magnetic compass 4B, a width of 60O ~ 1000ms half-sine shock 1O · times, this is only the impact of the vertical direction. New models is the impact of the magnetic compass have load of 15g, half sine wave width 1lms coordinate axis in three,ugg italia, six shocks three times in each direction. 15 |
|
